thumb|upright=1.6|[[MOSFET, showing gate (G), body (B), source (S), and drain (D) terminals. The gate is separated from the body by an insulating layer (pink).]]
The MOSFET is the basic building block of most modern electronics, and the most frequently manufactured device in history, with an estimated total of 13sextillion (1.3 × 1022) MOSFETs manufactured between 1960 and 2018. It is the most common semiconductor device in digital and analog circuits, and the most common power device. It was the first truly compact transistor that could be miniaturized and mass-produced for a wide range of uses. MOSFET scaling and miniaturization has been driving the rapid exponential growth of electronic semiconductor technology since the 1960s, and enable high-density integrated circuits (ICs) such as memory chips and microprocessors.
MOSFETs in integrated circuits are the primary elements of computer processors, semiconductor memory, image sensors, and most other types of integrated circuits. Discrete MOSFET devices are widely used in applications such as switch mode power supplies, variable-frequency drives, and other power electronics applications where each device may be switching thousands of watts. Radio-frequency amplifiers up to the UHF spectrum use MOSFET transistors as analog signal and power amplifiers. Radio systems also use MOSFETs as oscillators, or mixers to convert frequencies. MOSFET devices are also applied in audio-frequency power amplifiers for public address systems, sound reinforcement, and home and automobile sound systems.
The MOSFET is the most widely used type of transistor and the most critical device component in integrated circuit (IC) chips.[2]Planar process, developed by Jean Hoerni at Fairchild Semiconductor in early 1959, was critical to the invention of the monolithic integrated circuit chip by Robert Noyce later in 1959.[3][4][5] The same year,[6] Atalla used his surface passivation process to make the first working MOSFET with Dawon Kahng at Bell Labs.[7][8] This was followed by the development of clean rooms to reduce contamination to levels never before thought necessary, and coincided with the development of photolithography[9] which, along with surface passivation and the planar process, allowed circuits to be made in few steps.
Atalla realised that the main advantage of a MOS transistor was its ease of fabrication, particularly suiting it for use in the recently invented integrated circuits.[10] In contrast to bipolar transistors which required a number of steps for the p–n junction isolation of transistors on a chip, MOSFETs required no such steps but could be easily isolated from each other.[11] Its advantage for integrated circuits was re-iterated by Dawon Kahng in 1961.[12] The Si–SiO2 system possessed the technical attractions of low cost of production (on a per circuit basis) and ease of integration. These two factors, along with its rapidly scaling miniaturization and low energy consumption, led to the MOSFET becoming the most widely used type of transistor in IC chips.
The earliest experimental MOS IC to be demonstrated was a 16-transistor chip built by Fred Heiman and Steven Hofstein at RCA in 1962.[13]General Microelectronics later introduced the first commercial MOS integrated circuits in 1964, consisting of 120 p-channel transistors.[14] It was a 20-bit shift register, developed by Robert Norman[13] and Frank Wanlass.[15] In 1967, Bell Labs researchers Robert Kerwin, Donald Klein and John Sarace developed the self-aligned gate (silicon-gate) MOS transistor, which Fairchild Semiconductor researchers Federico Faggin and Tom Klein used to develop the first silicon-gate MOS IC.[16]
MOS IC chips
Intel 4004 (1971), the first single-chip microprocessor. It is a 4-bit central processing unit (CPU), fabricated on a silicon-gate PMOS large-scale integration (LSI) chip with a 10 µm process.
There are various different types of MOS IC chips, which include the following.[17]
MOS large-scale integration (MOS LSI)
With its high scalability,[34] and much lower power consumption and higher density than bipolar junction transistors,[35] the MOSFET made it possible to build high-density IC chips.[1] By 1964, MOS chips had reached higher transistor density and lower manufacturing costs than bipolar chips. MOS chips further increased in complexity at a rate predicted by Moore's law, leading to large-scale integration (LSI) with hundreds of MOSFETs on a chip by the late 1960s.[22] MOS technology enabled the integration of more than 10,000 transistors on a single LSI chip by the early 1970s,[36] before later enabling very large-scale integration (VLSI).[23][18]
Microprocessors
The MOSFET is the basis of every microprocessor,[28] and was responsible for the invention of the microprocessor.[37] The origins of both the microprocessor and the microcontroller can be traced back to the invention and development of MOS technology. The application of MOS LSI chips to computing was the basis for the first microprocessors, as engineers began recognizing that a complete computer processor could be contained on a single MOS LSI chip.[22]
The earliest microprocessors were all MOS chips, built with MOS LSI circuits. The first multi-chip microprocessors, the Four-Phase Systems AL1 in 1969 and the Garrett AiResearch MP944 in 1970, were developed with multiple MOS LSI chips. The first commercial single-chip microprocessor, the Intel 4004, was developed by Federico Faggin, using his silicon-gate MOS IC technology, with Intel engineers Marcian Hoff and Stan Mazor, and Busicom engineer Masatoshi Shima.[38] With the arrival of CMOS microprocessors in 1975, the term "MOS microprocessors" began to refer to chips fabricated entirely from PMOS logic or fabricated entirely from NMOS logic, contrasted with "CMOS microprocessors" and "bipolar bit-slice processors".[39]
Complementary metal–oxide–semiconductor (CMOS) logic[41] was developed by Chih-Tang Sah and Frank Wanlass at Fairchild Semiconductor in 1963.[42] CMOS had lower power consumption, but was initially slower than NMOS, which was more widely used for computers in the 1970s. In 1978, Hitachi introduced the twin-well CMOS process, which allowed CMOS to match the performance of NMOS with less power consumption. The twin-well CMOS process eventually overtook NMOS as the most common semiconductor manufacturing process for computers in the 1980s.[43] By the 1980s CMOS logic consumed over 7times less power than NMOS logic,[43] and about 100,000 times less power than bipolar transistor-transistor logic (TTL).[44]
Digital
The growth of digital technologies like the microprocessor has provided the motivation to advance MOSFET technology faster than any other type of silicon-based transistor.[45] A big advantage of MOSFETs for digital switching is that the oxide layer between the gate and the channel prevents DC current from flowing through the gate, further reducing power consumption and giving a very large input impedance. The insulating oxide between the gate and channel effectively isolates a MOSFET in one logic stage from earlier and later stages, which allows a single MOSFET output to drive a considerable number of MOSFET inputs. Bipolar transistor-based logic (such as TTL) does not have such a high fanout capacity. This isolation also makes it easier for the designers to ignore to some extent loading effects between logic stages independently. That extent is defined by the operating frequency: as frequencies increase, the input impedance of the MOSFETs decreases.
The MOSFET's advantages in digital circuits do not translate into supremacy in all analog circuits. The two types of circuit draw upon different features of transistor behavior. Digital circuits switch, spending most of their time either fully on or fully off. The transition from one to the other is only of concern with regards to speed and charge required. Analog circuits depend on operation in the transition region where small changes to Vgs can modulate the output (drain) current. The JFET and bipolar junction transistor (BJT) are preferred for accurate matching (of adjacent devices in integrated circuits), higher transconductance and certain temperature characteristics which simplify keeping performance predictable as circuit temperature varies.
Nevertheless, MOSFETs are widely used in many types of analog circuits because of their own advantages (zero gate current, high and adjustable output impedance and improved robustness vs. BJTs which can be permanently degraded by even lightly breaking down the emitter-base).[vague] The characteristics and performance of many analog circuits can be scaled up or down by changing the sizes (length and width) of the MOSFETs used. By comparison, in bipolar transistors the size of the device does not significantly affect its performance.[citation needed] MOSFETs' ideal characteristics regarding gate current (zero) and drain-source offset voltage (zero) also make them nearly ideal switch elements, and also make switched capacitor analog circuits practical. In their linear region, MOSFETs can be used as precision resistors, which can have a much higher controlled resistance than BJTs. In high power circuits, MOSFETs sometimes have the advantage of not suffering from thermal runaway as BJTs do.[dubious – discuss] Also, MOSFETs can be configured to perform as capacitors and gyrator circuits which allow op-amps made from them to appear as inductors, thereby allowing all of the normal analog devices on a chip (except for diodes, which can be made smaller than a MOSFET anyway) to be built entirely out of MOSFETs. This means that complete analog circuits can be made on a silicon chip in a much smaller space and with simpler fabrication techniques. MOSFETS are ideally suited to switch inductive loads because of tolerance to inductive kickback.
Some ICs combine analog and digital MOSFET circuitry on a single mixed-signal integrated circuit, making the needed board space even smaller. This creates a need to isolate the analog circuits from the digital circuits on a chip level, leading to the use of isolation rings and silicon on insulator (SOI). Since MOSFETs require more space to handle a given amount of power than a BJT, fabrication processes can incorporate BJTs and MOSFETs into a single device. Mixed-transistor devices are called bi-FETs (bipolar FETs) if they contain just one BJT-FET and BiCMOS (bipolar-CMOS) if they contain complementary BJT-FETs. Such devices have the advantages of both insulated gates and higher current density.
Bluetooth dongle. RF CMOS mixed-signal integrated circuits are widely used in nearly all modern Bluetooth devices.[31]
In the late 1980s, Asad Abidi pioneered RF CMOS technology, which uses MOS VLSI circuits, while working at UCLA. This changed the way in which RF circuits were designed, away from discrete bipolar transistors and towards CMOS integrated circuits. As of 2008, the radio transceivers in all wireless networking devices and modern mobile phones are mass-produced as RF CMOS devices. RF CMOS is also used in nearly all modern Bluetooth and wireless LAN (WLAN) devices.[31]
Analog switches
MOSFET analog switches use the MOSFET to pass analog signals when on, and as a high impedance when off. Signals flow in both directions across a MOSFET switch. In this application, the drain and source of a MOSFET exchange places depending on the relative voltages of the source/drain electrodes. The source is the more negative side for an N-MOS or the more positive side for a P-MOS. All of these switches are limited on what signals they can pass or stop by their gate–source, gate–drain, and source–drain voltages; exceeding the voltage, current, or power limits will potentially damage the switch.
Single-type
This analog switch uses a four-terminal simple MOSFET of either P or N type.
In the case of an n-type switch, the body is connected to the most negative supply (usually GND) and the gate is used as the switch control. Whenever the gate voltage exceeds the source voltage by at least a threshold voltage, the MOSFET conducts. The higher the voltage, the more the MOSFET can conduct. An N-MOS switch passes all voltages less than Vgate − Vtn. When the switch is conducting, it typically operates in the linear (or ohmic) mode of operation, since the source and drain voltages will typically be nearly equal.
In the case of a P-MOS, the body is connected to the most positive voltage, and the gate is brought to a lower potential to turn the switch on. The P-MOS switch passes all voltages higher than Vgate − Vtp (threshold voltage Vtp is negative in the case of enhancement-mode P-MOS).
Dual-type (CMOS)
This "complementary" or CMOS type of switch uses one P-MOS and one N-MOS FET to counteract the limitations of the single-type switch. The FETs have their drains and sources connected in parallel, the body of the P-MOS is connected to the high potential (VDD) and the body of the N-MOS is connected to the low potential (gnd). To turn the switch on, the gate of the P-MOS is driven to the low potential and the gate of the N-MOS is driven to the high potential. For voltages between VDD − Vtn and gnd − Vtp, both FETs conduct the signal; for voltages less than gnd − Vtp, the N-MOS conducts alone; and for voltages greater than VDD − Vtn, the P-MOS conducts alone.
The voltage limits for this switch are the gate–source, gate–drain and source–drain voltage limits for both FETs. Also, the P-MOS is typically two to three times wider than the N-MOS, so the switch will be balanced for speed in the two directions.
Tri-state circuitry sometimes incorporates a CMOS MOSFET switch on its output to provide for a low-ohmic, full-range output when on, and a high-ohmic, mid-level signal when off.
DDR4 SDRAM dual in-line memory module (DIMM). It is a type of DRAM (dynamic random-access memory), which uses MOS memory cells consisting of MOSFETs and MOS capacitors.
MOS technology is the basis for DRAM (dynamic random-access memory). In 1966, Dr. Robert H. Dennard at the IBMThomas J. Watson Research Center was working on MOS memory. While examining the characteristics of MOS technology, he found it was capable of building capacitors, and that storing a charge or no charge on the MOS capacitor could represent the 1 and 0 of a bit, while the MOS transistor could control writing the charge to the capacitor. This led to his development of a single-transistor DRAM memory cell.[47] In 1967, Dennard filed a patent under IBM for a single-transistor DRAM (dynamic random-access memory) memory cell, based on MOS technology.[48] MOS memory enabled higher performance, was cheaper, and consumed less power, than magnetic-core memory, leading to MOS memory overtaking magnetic core memory as the dominant computer memory technology by the early 1970s.[49]
USB flash drive. It uses flash memory, a type of MOS memory consisting of floating-gate MOSFET memory cells.
There are various different types of MOS memory. The following list includes various different MOS memory types.[53]
MOS sensors
A number of MOSFET sensors have been developed, for measuring physical, chemical, biological and environmental parameters.[63] The earliest MOSFET sensors include the open-gate FET (OGFET) introduced by Johannessen in 1970,[63] the ion-sensitive field-effect transistor (ISFET) invented by Piet Bergveld in 1970,[64] the adsorption FET (ADFET) patented by P.F. Cox in 1974, and a hydrogen-sensitive MOSFET demonstrated by I. Lundstrom, M.S. Shivaraman, C.S. Svenson and L. Lundkvist in 1975.[63] The ISFET is a special type of MOSFET with a gate at a certain distance,[63] and where the metal gate is replaced by an ion-sensitive membrane, electrolyte solution and reference electrode.[65]
MOS technology is the basis for modern image sensors, including the charge-coupled device (CCD) and the CMOS active-pixel sensor (CMOS sensor), used in digital imaging and digital cameras.[66]Willard Boyle and George E. Smith developed the CCD in 1969. While researching the MOS process, they realized that an electric charge was the analogy of the magnetic bubble and that it could be stored on a tiny MOS capacitor. As it was fairly straightforward to fabricate a series of MOS capacitors in a row, they connected a suitable voltage to them so that the charge could be stepped along from one to the next.[66] The CCD is a semiconductor circuit that was later used in the first digital video cameras for television broadcasting.[70]
MOS image sensors are widely used in optical mouse technology. The first optical mouse, invented by Richard F. Lyon at Xerox in 1980, used a 5µm NMOS sensor chip.[73][74] Since the first commercial optical mouse, the IntelliMouse introduced in 1999, most optical mouse devices use CMOS sensors.[69]
Other sensors
MOS sensors, also known as MOSFET sensors, are widely used to measure physical, chemical, biological and environmental parameters.[63] The ion-sensitive field-effect transistor (ISFET), for example, is widely used in biomedical applications.[65]
MOSFETs are also widely used in microelectromechanical systems (MEMS), as silicon MOSFETs could interact and communicate with the surroundings and process things such as chemicals, motions and light.[75] An early example of a MEMS device is the resonant-gate transistor, an adaptation of the MOSFET, developed by Harvey C. Nathanson in 1965.[76]
Common applications of other MOS sensors include the following.
Power MOSFET
thumb|upright=1.2|Two [[power MOSFETs in D2PAK surface-mount packages. Operating as switches, each of these components can sustain a blocking voltage of 120V in the off state, and can conduct a continuous current of 30 A in the on state, dissipating up to about 100 W and controlling a load of over 2000 W. A matchstick is pictured for scale.]]
The power MOSFET, which is commonly used in power electronics, was developed in the early 1970s.[82] The power MOSFET enables low gate drive power, fast switching speed, and advanced paralleling capability.[83]
The power MOSFET is the most widely used power device in the world.[83] Advantages over bipolar junction transistors in power electronics include MOSFETs not requiring a continuous flow of drive current to remain in the ON state, offering higher switching speeds, lower switching power losses, lower on-resistances, and reduced susceptibility to thermal runaway.[84] The power MOSFET had an impact on power supplies, enabling higher operating frequencies, size and weight reduction, and increased volume production.[85]
Switching power supplies are the most common applications for power MOSFETs.[86] They are also widely used for MOS RF power amplifiers, which enabled the transition of mobile networks from analog to digital in the 1990s. This led to the wide proliferation of wireless mobile networks, which revolutionised telecommunication systems.[87] The LDMOS in particular is the most widely used power amplifier in mobile networks such as 2G, 3G,[87]4G and 5G,[88] as well as broadcasting and amateur radio.[89] Over 50billion discrete power MOSFETs are shipped annually, as of 2018. They are widely used for automotive, industrial and communications systems in particular.[90] Power MOSFETs are commonly used in automotive electronics, particularly as switching devices in electronic control units,[91] and as power converters in modern electric vehicles.[92] The insulated-gate bipolar transistor (IGBT), a hybrid MOS-bipolar transistor, is also used for a wide variety of applications.[93]
LDMOS, a power MOSFET with lateral structure, is commonly used in high-end audio amplifiers and high-power PA systems. Their advantage is a better behaviour in the saturated region (corresponding to the linear region of a bipolar transistor) than the vertical MOSFETs. Vertical MOSFETs are designed for switching applications.[94]
RF DMOS, also known as RF power MOSFET, is a type of DMOS power transistor designed for radio-frequency (RF) applications. It is used in various radio and RF applications, which include the following.[121][122]
Consumer electronics
MOSFETs are fundamental to the consumer electronics industry.[109] According to Colinge, numerous consumer electronics would not exist without the MOSFET, such as digital wristwatches, pocket calculators, and video games, for example.[127]
MOSFETs are commonly used for a wide range of consumer electronics, which include the following devices listed. Computers or telecommunication devices (such as phones) are not included here, but are listed separately in the Information and communications technology (ICT) section below.
Casio pocket calculator with liquid-crystal display (LCD). MOSFETs are the basis for pocket calculators and LCDs.
Pocket calculators
One of the earliest influential consumer electronic products enabled by MOS LSI circuits was the electronic pocket calculator,[36] as MOS LSI technology enabled large amounts of computational capability in small packages.[151] In 1965, the Victor 3900 desktop calculator was the first MOS LSI calculator, with 29 MOS LSI chips.[152] In 1967 the Texas Instruments Cal-Tech was the first prototype electronic handheld calculator, with three MOS LSI chips, and it was later released as the Canon Pocketronic in 1970.[153] The Sharp QT-8D desktop calculator was the first mass-produced LSI MOS calculator in 1969,[152] and the Sharp EL-8 which used four MOS LSI chips was the first commercial electronic handheld calculator in 1970.[153] The first true electronic pocket calculator was the Busicom LE-120A HANDY LE, which used a single MOS LSI calculator-on-a-chip from Mostek, and was released in 1971.[153] By 1972, MOS LSI circuits were commercialized for numerous other applications.[128]
Audio-visual (AV) media
Sony home cinema setup, with full HD LCD television, digital TV set-top box, DVD player, PlayStation 3 video game console, and loudspeakers. MOSFETs are used in all of these consumer electronic devices.
MOSFETs are commonly used for a wide range of audio-visual (AV) media technologies, which include the following list of applications.[140]
Mobile phone battery charger, a type of switched-mode power supply (SMPS) AC adapter. Power MOSFETs are widely used in most SMPS power supplies[86] and mobile device AC adapters.[181]
Information and communications technology (ICT)
MOSFETs are fundamental to information and communications technology (ICT),[189][190] including modern computers,[188][127][18] modern computing,[191] telecommunications, the communications infrastructure,[188][120] the Internet,[188][185][192]digital telephony,[32]wireless telecommunications,[87][88] and mobile networks.[88] According to Colinge, the modern computer industry and digital telecommunication systems would not exist without the MOSFET.[127] Advances in MOS technology has been the most important contributing factor in the rapid rise of network bandwidth in telecommunication networks, with bandwidth doubling every 18 months, from bits per second to terabits per second (Edholm's law).[193]
Computers
Personal computer (PC) with monitor, keyboard and mouse. MOSFETs are the basis for PCs,[185] and also widely used in peripherals such as monitors, keyboards, printers, speakers and optical mouse devices.
MOSFETs are commonly used in a wide range of computers and computing applications, which include the following.
The insulated-gate bipolar transistor (IGBT) is a power transistor with characteristics of both a MOSFET and bipolar junction transistor (BJT).[232](As of 2010), the IGBT is the second most widely used power transistor, after the power MOSFET. The IGBT accounts for 27% of the power transistor market, second only to the power MOSFET (53%), and ahead of the RF amplifier (11%) and bipolar junction transistor (9%).[233] The IGBT is widely used in consumer electronics, industrial technology, the energy sector, aerospace electronic devices, and transportation.
The IGBT is widely used in the following applications.
A two-dimensional electron gas (2DEG) is present when a MOSFET is in inversion mode, and is found directly beneath the gate oxide.
In quantum physics and quantum mechanics, the MOSFET is the basis for two-dimensional electron gas (2DEG)[237] and the quantum Hall effect.[237][238] The MOSFET enables physicists to study electron behavior in a two-dimensional gas, called a two-dimensional electron gas. In a MOSFET, conduction electrons travel in a thin surface layer, and a "gate" voltage controls the number of charge carriers in this layer. This allows researchers to explore quantum effects by operating high-purity MOSFETs at liquid helium temperatures.[237]
In 1978, the Gakushuin University researchers Jun-ichi Wakabayashi and Shinji Kawaji observed the Hall effect in experiments carried out on the inversion layer of MOSFETs.[239] In 1980, Klaus von Klitzing, working at the high magnetic field laboratory in Grenoble with silicon-based MOSFET samples developed by Michael Pepper and Gerhard Dorda, made the unexpected discovery of the quantum Hall effect.[237][238]
MOSFETs are widely used in transportation.[108][80][95] For example, they are commonly used for automotive electronics in the Automotive industry .[68][55] MOS technology is commonly used for a wide range of vehicles and transportation, which include the following applications.
The Cassini–Huygens to Saturn in 1997 had spacecraft power distribution accomplished 192 solid-state power switch (SSPS) devices, which also functioned as circuit breakers in the event of an overload condition. The switches were developed from a combination of two semiconductor devices with switching capabilities: the MOSFET and the ASIC (application-specific integrated circuit). This combination resulted in advanced power switches that had better performance characteristics than traditional mechanical switches.[112]
Other applications
MOSFETs are commonly used for a wide range of other applications, which include the following.
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↑Boyle, William S; Smith, George E. (1970). "Charge Coupled Semiconductor Devices". Bell Syst. Tech. J.49 (4): 587–593. doi:10.1002/j.1538-7305.1970.tb01790.x.
↑Matsumoto, Kazuya et al. (1985). "A new MOS phototransistor operating in a non-destructive readout mode". Japanese Journal of Applied Physics24 (5A): L323. doi:10.1143/JJAP.24.L323. Bibcode: 1985JaJAP..24L.323M.
↑Eric R. Fossum (1993), "Active Pixel Sensors: Are CCD's Dinosaurs?" Proc. SPIE Vol. 1900, p. 2–14, Charge-Coupled Devices and Solid State Optical Sensors III, Morley M. Blouke; Ed.
↑Mysiński, W. (September 2017). "SiC mosfet transistors in power analog application". 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe): P1–P7. doi:10.23919/EPE17ECCEEurope.2017.8099305. ISBN978-90-75815-27-6.
↑ 120.0120.1120.2120.3120.4120.5120.6120.7Whiteley, Carol; McLaughlin, John Robert (2002). Technology, Entrepreneurs, and Silicon Valley. Institute for the History of Technology. ISBN9780964921719. https://books.google.com/books?id=x9koAQAAIAAJ. "These active electronic components, or power semiconductor products, from Siliconix are used to switch and convert power in a wide range of systems, from portable information appliances to the communications infrastructure that enables the Internet. The company's power MOSFETs – tiny solid-state switches, or metal oxide semiconductor field-effect transistors – and power integrated circuits are widely used in cell phones and notebook computers to manage battery power efficiently"
↑ 140.00140.01140.02140.03140.04140.05140.06140.07140.08140.09140.10Paul, D. J. (2002). "Nanoelectronics". Encyclopedia of Physical Science and Technology (3rd ed.). Academic Press. pp. 285–301 (285–6). doi:10.1016/B0-12-227410-5/00469-5. ISBN978-0-12-227420-6. https://books.google.com/books?id=T4xUAAAAMAAJ. "Many new technologies appeared during the 20th century. If one had to decide on which new technology had the largest impact on mankind, the microelectronics industry would certainly be one of the main contenders. Microelectronic components in the form of microprocessors and memory are used in computers, audiovisual components from hi-fis and videos to televisions, cars (the smallest Daimler-Benz car has over 60 microprocessors), communications systems including telephones and mobile phones, banking, credit cards, cookers, heating controllers, toasters, food processors – the list is almost endless. (...) The microelectronics industry has therefore become nanoelectronics named after the Greek for a dwarf "nanos." This article will review the silicon nanoelectronic field and discuss how far the silicon MOSFET can be scaled down."
↑ 146.0146.1146.2Business Automation. Hitchcock Publishing Company. 1972. p. 28. https://books.google.com/books?id=KPC7AAAAIAAJ. "In addition, electro-optical technology and MOS/LSI electronics combine to provide a highly accurate embossed credit card reader which can be part of a POS terminal or standalone unit. It detects embossed numbers for direct checking with a central computer to verify a customer's credit and initiate the purchasing transaction. Also, the same electronics can be used to read data contained on magnetic tape and other types of credit card"
↑ 160.0160.1160.2160.3160.4160.5160.6Zeidler, G.; Becker, D. (1974). "MOS LSI Custom Circuits Offer New Prospects for Communications Equipment Design". Electrical Communication (Western Electric Company) 49–50: 88–92. https://books.google.com/books?id=TihQAAAAYAAJ. "In many fields of communications equipment design, MOS LSI custom built circuits provide the only practical and economic solution. Important examples include the coin telephone NT 2000, the QUICKSTEP*push button set, a push button signal receiver. (...) A complete list of all applications is beyond the scope of this paper since new MOS developments are constantly being initiated in the various technical areas. Typical examples of completed and present MOS developments are: — crosspoints — multiplexers — modems — mobile radios — push button signal receivers — mail sorting machines — multimeters — telephone sets — coin telephones — teleprinters — screen displays — television receivers.".
↑U.S. Patent 5,598,285: K. Kondo, H. Terao, H. Abe, M. Ohta, K. Suzuki, T. Sasaki, G. Kawachi, J. Ohwada, Liquid crystal display device, filed 18 September 1992 and 20 January 1993.
↑Hamaoui, H.; Chesley, G.; Schlageter, J. (February 1972). "1972 IEEE International Solid-State Circuits Conference. Digest of Technical Papers". 1972 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. XV. pp. 124–125. doi:10.1109/ISSCC.1972.1155048.
↑Holler, M.; Tam, S.; Castro, H.; Benson, R. (1989). "An electrically trainable artificial neural network (ETANN) with 10240 'floating gate' synapses". Proceedings of the International Joint Conference on Neural Networks (Washington, D.C.) 2: 191–196. doi:10.1109/IJCNN.1989.118698.
↑ 207.0207.1Hayward, G.; Gottlieb, A.; Jain, S.; Mahoney, D. (October 1987). "CMOS VLSI Applications in Broadband Circuit Switching". IEEE Journal on Selected Areas in Communications5 (8): 1231–1241. doi:10.1109/JSAC.1987.1146652. ISSN1558-0008.
↑ 208.0208.1Hui, J.; Arthurs, E. (October 1987). "A Broadband Packet Switch for Integrated Transport". IEEE Journal on Selected Areas in Communications5 (8): 1264–1273. doi:10.1109/JSAC.1987.1146650. ISSN1558-0008.
↑Daneshrad, Babal; Eltawil, Ahmed M. (2002). "Integrated Circuit Technologies for Wireless Communications". Wireless Multimedia Network Technologies. The International Series in Engineering and Computer Science (Springer US) 524: 227–244. doi:10.1007/0-306-47330-5_13. ISBN0-7923-8633-7.
↑ 238.0238.1K. v. Klitzing; G. Dorda; M. Pepper (1980). "New method for high-accuracy determination of the fine-structure constant based on quantized Hall resistance". Phys. Rev. Lett.45 (6): 494–497. doi:10.1103/PhysRevLett.45.494. Bibcode: 1980PhRvL..45..494K.
↑Jun-ichi Wakabayashi; Shinji Kawaji (1978). "Hall effect in silicon MOS inversion layers under strong magnetic fields". J. Phys. Soc. Jpn.44 (6): 1839. doi:10.1143/JPSJ.44.1839. Bibcode: 1978JPSJ...44.1839W.
↑Riethmuller, W.; Benecke, W.; Schnakenberg, U.; Wagner, B. (June 1991). "Development of commercial CMOS process-based technologies for the fabrication of smart accelerometers". TRANSDUCERS '91: 1991 International Conference on Solid-State Sensors and Actuators. Digest of Technical Papers: 416–419. doi:10.1109/SENSOR.1991.148900. ISBN0-87942-585-7.
↑Lewallen, D. R. (1969). "Proceedings of the 6th annual conference on Design Automation - DAC '69". DAC '69 Proceedings of the 6th annual Design Automation Conference. pp. 91–101. doi:10.1145/800260.809019.
↑Van Beek, H. W. (May 1972). "Proceedings of the November 16-18, 1971, fall joint computer conference on - AFIPS '71 (Fall)". AFIPS '72 (Spring) Proceedings of the 16–18 May 1972, spring joint computer conference. pp. 1059–1063. doi:10.1145/1478873.1479014.
↑Lança, Luís; Silva, Augusto (2013). "Digital Radiography Detectors: A Technical Overview". Digital imaging systems for plain radiography. New York: Springer. pp. 14–17. doi:10.1007/978-1-4614-5067-2_2. ISBN978-1-4614-5066-5.