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Frank Wanlass
Frank Marion Wanlass (May 17, 1933, in Thatcher, AZ – September 9, 2010, in Santa Clara, California) was an American electrical engineer. He is best known for inventing, along with Chih-Tang Sah, CMOS (complementary MOS) logic in 1963. CMOS has since become the standard semiconductor device fabrication process for MOSFETs (metal–oxide–semiconductor field-effect transistors). Biography He obtained his PhD from the University of Utah. Wanlass invented CMOS (complementary MOS) logic circuits with Chih-Tang Sah in 1963, while working at Fairchild Semiconductor. Wanlass was given U.S. patent #3,356,858 for "Low Stand-By Power Complementary Field Effect Circuitry" in 1967.IC Knowledge - History of the Integrated Circuit - 1960s In 1963, while studying |
Thatcher, AZ
Thatcher is a town in Graham County, Arizona, United States. According to the 2010 Census, the population of the town is 4,865. It is part of the Safford Micropolitan Statistical Area. Thatcher is the home of Eastern Arizona College (EAC), a college that offers two year degrees and includes a nursing school. History Thatcher was originally settled by members of the Church of Jesus Christ of Latter-day Saints. The first settler was John M. Moody who arrived in Thatcher with his wife and children in 1881. The founding of Thatcher is attributed to Mormon pioneer Christopher Layton, who bought two thousand acres, named the acreage "Thatcher", divided them into lots, and sold those lots to Mormon settlers. Layton also bought a gristmill and built roads, canals and homes. Eastern Arizona College traces its history to the St. Joseph Stake Academy started by the church in nearby Central. Central is also the location of the Gila Valley Arizona Temple. Geography The town is cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Programmable Read-only Memory
A programmable read-only memory (PROM) is a form of digital memory where the contents can be changed once after manufacture of the device. The data is then permanent and cannot be changed. It is one type of read-only memory (ROM). PROMs are used in digital electronic devices to store permanent data, usually low level programs such as firmware or microcode. The key difference from a standard Read-only memory, ROM is that the data is written into a ROM during manufacture, while with a PROM the data is programmed into them after manufacture. Thus, ROMs tend to be used only for large production runs with well-verified data. PROMs may be used where the volume required does not make a factory-programmed ROM economical, or during development of a system that may ultimately be converted to ROMs in a mass produced version. PROMs are manufactured blank and, depending on the technology, can be programmed at wafer, final test, or in system. Blank PROM chips are programmed by plugging them int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Beam Epitaxy
Molecular-beam epitaxy (MBE) is an epitaxy method for thin-film deposition of single crystals. MBE is widely used in the manufacture of semiconductor devices, including transistors. MBE is used to make diodes and MOSFETs (MOS field-effect transistors) at microwave frequencies, and to manufacture the lasers used to read optical discs (such as CDs and DVDs). History The original ideas of the MBE process were first established by K. G. Günther. Films that he deposited were not epitaxial, but were deposited on glass substrates. With the development of vacuum technology, the MBE process was demonstrated by John Davey and Titus Pankey who succeeded in growing GaAs epitaxial films on single crystal GaAs substrates using Günther's method. Major subsequent development of MBE films was enabled by J.R. Arthur's investigations of kinetic behavior of growth mechanisms and Alfred Y. Cho's in situ observation of MBE process using reflection high-energy electron diffraction (RHEED) in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dov Frohman
Dov Frohman (, also Dov Frohman-Bentchkowsky; born March 28, 1939) is an Israeli electrical engineer and business executive. A former vice president of Intel Corporation, he is the inventor of the erasable programmable read only memory (EPROM) and the founder and first general manager of Intel Israel. He is also the author (with Robert Howard) of ''Leadership the Hard Way'' (Jossey-Bass, 2008). Biography Dov Frohman was born in March 1939 in Amsterdam, five months before the start of World War II. His parents were Abraham and Feijga Frohman, Polish Jews who had emigrated to the Netherlands in the early 1930s to escape rising anti-Semitism in Poland. In 1942, after the German invasion of the Low Countries and as the Nazi grip on Holland’s Jewish community tightened, his parents decided to give their child to acquaintances in the Dutch resistance who placed him with the Van Tilborghs, an orthodox Christian farming family that lived in the village of Sprang-Capelle in the regio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Hoerni
Jean Amédée Hoerni (September 26, 1924 – January 12, 1997) was a Swiss-born American engineer. He was a silicon transistor pioneer, and a member of the "traitorous eight". He developed the planar process, an important technology for reliably Semiconductor device fabrication, fabricating and manufacturing semiconductor devices, such as transistors and integrated circuits. Biography Hoerni was born on September 26, 1924, in Geneva, Switzerland. He received his Bachelor of Science, B.S. in Mathematics from the University of Geneva and two Doctor of Philosophy, Ph.D.s in physics; one from the University of Geneva and the other from the University of Cambridge. In 1952, he moved to the United States to work at the California Institute of Technology, where he became acquainted with William Shockley, a physicist at Bell Labs who was intimately involved with the creation of the transistor. A few years later, Shockley recruited Hoerni to work with him at the newly founded Shockley Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planar Process
The planar process is a semiconductor device fabrication, manufacturing process used in the semiconductor industry to build individual components of a transistor, and in turn, connect those transistors together. It is the primary process by which silicon integrated circuit chips are built, and it is the most commonly used method of producing Junction (electricity), junctions during the manufacture of semiconductor devices. The process utilizes the surface passivation and thermal oxidation methods. The planar process was developed at Fairchild Semiconductor in 1959 and process proved to be one of the most important single advances in semiconductor technology. Overview The key concept is to view a circuit in its two-dimensional projection (a plane), thus allowing the use of photographic processing concepts such as film negatives to mask the projection of light exposed chemicals. This allows the use of a series of exposures on a substrate (silicon) to create silicon oxide (insulators ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dawon Kahng
Dawon Kahng (; May 4, 1931 – May 13, 1992) was a Korean-American electrical engineer and inventor, known for his work in solid-state electronics. He is best known for inventing the MOSFET (metal–oxide–semiconductor field-effect transistor, or MOS transistor), along with his colleague Mohamed Atalla, in 1959. Kahng and Atalla developed both the PMOS and NMOS processes for MOSFET semiconductor device fabrication. The MOSFET is the most widely used type of transistor, and the basic element in most modern electronic equipment. Kahng and Atalla later proposed the concept of the MOS integrated circuit, and they did pioneering work on Schottky diodes and nanolayer-base transistors in the early 1960s. Kahng then invented the floating-gate MOSFET (FGMOS) with Simon Min Sze in 1967. Kahng and Sze proposed that FGMOS could be used as floating-gate memory cells for non-volatile memory (NVM) and reprogrammable read-only memory (ROM), which became the basis for EPROM (eras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mohamed Atalla
Mohamed M. Atalla (; August 4, 1924 – December 30, 2009) was an Egyptian-American engineer, physicist, cryptographer, inventor and entrepreneur. He was a semiconductor pioneer who made important contributions to modern electronics. He is best known for inventing, along with his colleague Dawon Kahng, the MOSFET (metal–oxide–semiconductor field-effect transistor, or MOS transistor) in 1959, which along with Atalla's earlier surface passivation processes, had a significant impact on the development of the electronics industry. He is also known as the founder of the data security company Atalla Corporation (now Utimaco Atalla), founded in 1972. He received the Stuart Ballantine Medal (now the Benjamin Franklin Medal in physics) and was inducted into the National Inventors Hall of Fame for his important contributions to semiconductor technology as well as data security. Born in Port Said, Egypt, he was educated at Cairo University in Egypt and then Purdue University in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semiconductor
A semiconductor is a material with electrical conductivity between that of a conductor and an insulator. Its conductivity can be modified by adding impurities (" doping") to its crystal structure. When two regions with different doping levels are present in the same crystal, they form a semiconductor junction. The behavior of charge carriers, which include electrons, ions, and electron holes, at these junctions is the basis of diodes, transistors, and most modern electronics. Some examples of semiconductors are silicon, germanium, gallium arsenide, and elements near the so-called " metalloid staircase" on the periodic table. After silicon, gallium arsenide is the second-most common semiconductor and is used in laser diodes, solar cells, microwave-frequency integrated circuits, and others. Silicon is a critical element for fabricating most electronic circuits. Semiconductor devices can display a range of different useful properties, such as passing current more easil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Inventors Hall Of Fame
The National Inventors Hall of Fame (NIHF) is an American not-for-profit organization, founded in 1973, which recognizes individual engineers and inventors who hold a US patent of significant technology. Besides the Hall of Fame, it also operates a museum in Alexandria, Virginia, sponsors educational programs, and a collegiate competition. As of 2025, 652 inventors have been inducted, mostly constituting historic persons from the past three centuries, but also including living inductees. Nominees must hold a US patent of significant contribution to the US welfare, and which advances science and useful arts. History The National Inventors Hall of Fame was founded in 1973 on the initiative of H. Hume Mathews, then the chairman of the National Council of Patent Law Associations (now the National Council of Intellectual Property Law Associations). It was launched by Ed Sobey, who was also the first director. In 1974, it gained a major sponsor in the U.S. Patent and Trademar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IEEE Solid-State Circuits Award
The IEEE Donald O. Pederson Award in Solid-State Circuits is a Technical Field Award of the Institute of Electrical and Electronics Engineers (IEEE). It was previously called the IEEE Solid-State Circuits Award. In November 2005 the award was renamed to honor Donald O. Pederson. He was one of the co-founders of the IEEE Solid-State Circuits Council, and was a driving force behind the initiation of the IEEE Journal of Solid-State Circuits. Recipients of this award receive a bronze medal, a certificate and an honorarium. This award is given for "outstanding contributions to solid-state circuits, as exemplified by benefit to society, enhancement to technology, and professional leadership". The award may be presented to an individual, or a team of up to three people. Recipients The following people received this award as the IEEE Donald O. Pederson Award in Solid-State Circuits: * 2024: Deong-Kyoon Jeong * 2023: Ingrid Verbauwhede * 2022: Akira Matsuzawa * 2021: A. Paul Bro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Four-phase Logic
Four-phase logic is a type of, and design methodology for dynamic logic. It enabled non-specialist engineers to design quite complex ICs, using either PMOS or NMOS processes. It uses a kind of 4-phase clock signal to smooth out power delivery and improvies switching time for MOS transistors. History R. K. "Bob" Booher, an engineer at Autonetics, invented four-phase logic and communicated the idea to Frank Wanlass at Fairchild Semiconductor; Wanlass promoted this logic form at General Instrument Microelectronics Division. Booher made the first working four-phase chip, the Autonetics DDA integrator, during February 1966; he later designed several chips for and built the Autonetics D200 airborne computer using this technique. In April 1967, Joel Karp and Elizabeth de Atley published an article, "Use four-phase MOS IC logic" in ''Electronic Design'' magazine. In the same year, Cohen, Rubenstein, and Wanlass published "MTOS four phase clock systems." Wanlass had been direc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
