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Halbleiterwerk Frankfurt (Oder)
Volkseigener Betrieb, VEB Halbleiterwerk Frankfurt (Oder) (abbreviated HFO or HWF) was the largest manufacturer of semiconductor devices in the German Democratic Republic. In 1989, HFO produced 110 million integrated circuits (70% of all integrated circuits produced in the GDR in that year), 9.7 million transistors, and 150 million transistor chips. Despite this, HFO did not rise to prominence like Zentrum Mikroelektronik Dresden (of ''U61000, megabit chip'' fame) or VEB Mikroelektronik "Karl Marx" Erfurt (known for Kombinat Mikroelektronik Erfurt#Microprocessors, its microprocessors). Also unlike Zentrum Mikroelektronik Dresden and VEB Mikroelektronik "Karl Marx" Erfurt, HFO did not survive long after German Reunification. History In January 1958, the production of germanium diodes started in the building of a former vocational school. Halbleiterwerk Frankfurt (Oder) was officially founded on 1 January 1959. In January 1961 new production facilities for germanium alloy-junction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volkseigener Betrieb
The Publicly Owned Enterprise (; abbreviated VEB) was the main legal form of industrial enterprise in East Germany. These state-owned enterprise were all publicly owned and were formed after mass nationalisation between 1945 and the early 1960s, and the handing back in 1954 of some 33 enterprises previously taken by the Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ... as reparations. The managing director of a VEB was called a plant or works manager (, or ). They were assisted by the first secretary of the factory party organisation () of the SED, and the chairman of the factory trade union (). Subordinate to them were roles such as "Chief Accountant" and "Technical Director". 200px, View of the VEB Carl Zeiss Jena, 1978 VEBs were initially vertical integratio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
7400 Series
The 7400 series is a popular logic family of transistor–transistor logic (TTL) integrated circuits (ICs). In 1964, Texas Instruments introduced the SN5400 series of logic chips, in a ceramic semiconductor package. A low-cost plastic package SN7400 series was introduced in 1966 which quickly gained over 50% of the logic chip market, and eventually becoming ''de facto'' standardized electronic components. Since the introduction of the original bipolar-transistor TTL parts, Pin-compatibility, pin-compatible parts were introduced with such features as low power CMOS technology and LVCMOS, lower supply voltages. Surface-mount technology, Surface mount packages exist for several popular logic family functions. Overview The 7400 series contains hundreds of devices that provide everything from basic logic gates, flip-flop (electronics), flip-flops, and counters, to special purpose bus transceivers and arithmetic logic units (ALU). Specific functions are described in a list of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
555 Timer IC
The 555 timer IC is an integrated circuit used in a variety of timer, delay, pulse generation, and Electronic oscillator, oscillator applications. It is one of the most popular timing ICs due to its flexibility and price. Derivatives provide two (#556 dual timer, 556) or four (#558 quad timer, 558) timing circuits in one package. The design was first marketed in 1972 by Signetics and used bipolar junction transistors. Since then, numerous companies have made the original timers and later similar low-power CMOS timers. In 2017, it was said that over a billion 555 timers are produced annually by some estimates, and that the design was "probably the most popular integrated circuit ever made". History The timer IC was designed in 1971 by Hans Camenzind under contract to Signetics. In 1968, he was hired by Signetics to develop a phase-locked loop (PLL) IC. He designed an oscillator for PLLs such that the frequency did not depend on the power supply voltage or temperature. Signe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Threshold Logic
High-threshold logic (HTL), also known as ''low-speed logic'' (''LSL'') or ''high-level logic'' (''HLL''), is a variant of diode–transistor logic used in environments where noise is very high. Operation The threshold values at the input to a logic gate determine whether a particular input is interpreted as a logic 0 or a logic 1 (e.g. anything less than 1 V is a logic 0, and anything above 3 V is a logic 1; in this example, the threshold values are 1 V and 3 V). HTL incorporates Zener diodes to create a large offset between logic 1 and logic 0 voltage levels. These devices usually ran off a 15 V power supply and were found in industrial control, where the high differential was intended to minimize the effect of noise. Advantages * Increased noise margin * High noise threshold value Disadvantage *Slow speed due to increased supply voltage resulting in use of high value resistors. *High power drawn Usage It is used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
7400-series Integrated Circuits
The 7400 series is a popular logic family of transistor–transistor logic (TTL) integrated circuits (ICs). In 1964, Texas Instruments introduced the SN5400 series of logic chips, in a ceramic semiconductor package. A low-cost plastic package SN7400 series was introduced in 1966 which quickly gained over 50% of the logic chip market, and eventually becoming ''de facto'' standardized electronic components. Since the introduction of the original bipolar-transistor TTL parts, pin-compatible parts were introduced with such features as low power CMOS technology and lower supply voltages. Surface mount packages exist for several popular logic family functions. Overview The 7400 series contains hundreds of devices that provide everything from basic logic gates, flip-flops, and counters, to special purpose bus transceivers and arithmetic logic units (ALU). Specific functions are described in a list of 7400 series integrated circuits. Some TTL parts were made with an ext ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transistor–transistor Logic
Transistor–transistor logic (TTL) is a logic family built from bipolar junction transistors (BJTs). Its name signifies that transistors perform both the logic function (the first "transistor") and the amplifying function (the second "transistor"), as opposed to earlier resistor–transistor logic (RTL) and diode–transistor logic (DTL). TTL integrated circuits (ICs) were widely used in applications such as computers, industrial controls, test equipment and instrumentation, consumer electronics, and synthesizers. After their introduction in integrated circuit form in 1963 by Sylvania Electric Products, TTL integrated circuits were manufactured by several semiconductor companies. The 7400 series by Texas Instruments became particularly popular. TTL manufacturers offered a wide range of logic gates, flip-flops, counters, and other circuits. Variations of the original TTL circuit design offered higher speed or lower power dissipation to allow design optimization. TTL devices w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bipolar Junction Transistor
A bipolar junction transistor (BJT) is a type of transistor that uses both electrons and electron holes as charge carriers. In contrast, a unipolar transistor, such as a field-effect transistor (FET), uses only one kind of charge carrier. A bipolar transistor allows a small current injected at one of its terminals to control a much larger current between the remaining two terminals, making the device capable of amplification or switching. BJTs use two p–n junctions between two semiconductor types, n-type and p-type, which are regions in a single crystal of material. The junctions can be made in several different ways, such as changing the doping of the semiconductor material as it is grown, by depositing metal pellets to form alloy junctions, or by such methods as diffusion of n-type and p-type doping substances into the crystal. The superior predictability and performance of junction transistors quickly displaced the original point-contact transistor. Diffused trans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Innovations For High Performance Microelectronics
Leibniz-Institut für innovative Mikroelektronik (English: Innovations for High Performance Microelectronics) is a German research institute located in Frankfurt (Oder), Brandenburg, Germany. The IHP was founded in 1983 as Institut für Halbleiterphysik (English: Institute for Semiconductor Physics), and is today part of the Gottfried Wilhelm Leibniz Scientific Community. The institute has four departments: System Design, Circuit Design, Technology and Materials Research. See also * Communicant Semiconductor Technologies * Halbleiterwerk Frankfurt (Oder) Volkseigener Betrieb, VEB Halbleiterwerk Frankfurt (Oder) (abbreviated HFO or HWF) was the largest manufacturer of semiconductor devices in the German Democratic Republic. In 1989, HFO produced 110 million integrated circuits (70% of all integrat ... (HFO, tr. "Semiconductor Factory in Frankfurt (Oder)") References External links * IHP Annual Report 2008(pdf-file) Joint Lab IHP / BTU Cottbus {{Authority control Resear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communicant Semiconductor Technologies
Communicant Semiconductor Technologies AG was a company based in Frankfurt (Oder), Eastern Germany, that aimed to mass-produce integrated circuits based on a carbon- doped silicon-germanium (Si-Ge:C) technology. The technology was developed by a local institute founded during the Communist era, Innovations for High Performance Microelectronics (IHP). History Communist era IHP was founded as Institut für Halbleiterphysik (tr. Institute for Semiconductor Physics), on December 22, 1983, from the research part of its parent organization, Halbleiterwerk Frankfurt (Oder) (HFO, tr. "Semiconductor Factory in Frankfurt (Oder)"), then the largest IC factory in East Germany. HFO itself was founded in 1959. On the eve of reunification the plant had 8000 employees. After German reunification in 1990 After German reunification, HFO lost its customer base in the Soviet bloc. Efforts were made to adapt, but it shrank from 8,000 to 100 people and finally closed in July 2002. However, IHP remai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CoCom
The Coordinating Committee for Multilateral Export Controls (CoCom) was established in 1949 at the beginning of the Cold War to coordinate controls on exports from Western Bloc countries to the Soviet Union and its allies. Operating through informal consensus, CoCom maintained extensive control lists covering arms, nuclear materials, and dual-use technologies. However, CoCom faced criticism for weak enforcement and inconsistent application among member states. CoCom officially disbanded on March 31, 1994. However, many of its export restrictions remained in effect among member nations until they were formally replaced by the Wassenaar Arrangement in 1996. CoCom's legacy continues to influence contemporary export control regimes, highlighting its enduring relevance in nonproliferation and technology policy. Origins and historical context CoCom originated from the tense geopolitical atmosphere following World War II, as Western nations grew increasingly wary of advanced technology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wafer (electronics)
In electronics, a wafer (also called a slice or substrate) is a thin slice of semiconductor, such as a crystalline silicon (c-Si, silicium), used for Semiconductor device fabrication, the fabrication of integrated circuits and, in photovoltaics, to manufacture solar cells. The wafer serves as the substrate (materials science), substrate for microelectronic devices built in and upon the wafer. It undergoes many microfabrication processes, such as doping (semiconductor), doping, ion implantation, Etching (microfabrication), etching, thin-film deposition of various materials, and Photolithography, photolithographic patterning. Finally, the individual microcircuits are separated by wafer dicing and Integrated circuit packaging, packaged as an integrated circuit. History In the semiconductor industry, the term wafer appeared in the 1950s to describe a thin round slice of semiconductor material, typically germanium or silicon. The round shape characteristic of these wafers comes f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bob Widlar
Robert John Widlar (pronounced ''wide-lar''; November 30, 1937 – February 27, 1991) was an American electronics engineer and a designer of linear integrated circuits (ICs). Early years Widlar was born November 30, 1937, in Cleveland to parents of Czech, Irish and German ethnicity.Lojek, p. 250. His mother, Mary Vithous, was born in Cleveland to Czech immigrants Frank Vithous (František Vitouš) and Marie Zakova (Marie Žáková).Lojek, p. 249. His father, Walter J. Widlar, came from prominent German and Irish American families whose ancestors settled in Cleveland in the middle of the 19th century. A self-taught radio engineer, Walter Widlar worked for the radio station and designed pioneering ultra high frequency transmitters. The world of electronics surrounded him since birth: one of his brothers became the first baby monitored by wireless radio. Guided by his father, Bob developed a strong interest in electronics in early childhood. Widlar never talked about his e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
