Microcircuits Semiconductors

A. Barraud, C. Rosiho, and A. Ruaudel-Teixier, Microcircuit Engineering 79, Institut of Semiconductors and Electronics, Aachen, Germany, 1979, p. 127. 

RAC publications include data summaries for specific component types, such as hybrid microcircuits, small, medium and large-scale integration digital devices, linear and interface devices, digital monolithic devices, and discrete semiconductors. In addition, there are reliability and equipment maintenance data books that provide the failure and repair time data on military electronic equipment by application such as subsystem. 

A semiconductor microcircuit is a series of electrically intercoimected films that are laid down by chemical reactions. The successful growth and manipulation of these films depend heavily on proper design of the chemical reactors in which they are laid down, the choice of chemical reagents, separation and purification steps, and the design and operation of sophisticated control systems. Microelectronics based on microcircuits are commonly used in such consumer items as calculators, digital watches, personal computers, and microwave ovens and in information processing units that are used in communication, defense, space exploration, medicine, and education. 

Gallium arsenide exhibits semiconductor properties. It is used in transistors, lasers, solar cells and various high-speed microcircuits. 

Chemistry is everywhere, even in industries that do not seem chemical. Making a single electronic microcircuit, for example, involves nearly one hundred different chemical processes. The air we breathe, the water we drink, the food we eat, and even the sunlight that we used to bask in, all are affected by chemical processes that we understand better thanks to new research. We depend on synthetic materials in our homes and workplaces, and even in our clothing. Our society is built in large part on plastics and semiconductors. Many of the problems that we confront have causes that chemistry can elucidate. Many of the remedies that we apply to these problems are chemical remedies, which often, as in the agreement to phase out CFCs, involve political solutions too. Whether we like it or not, the present scale of food production around the globe would be impossible without extensive use of chemical aids, in the form of pesticides and fertilizers. 

It is reasonable to expect that, if methods for quantitative measurement of the transport of ions in surface phases of semiconductors are developed, the way will open to the exploration of chemical and physical modification of these surface phases. The goal is to make these less conductive solid electrolytes—i.e., surface phases in which ion transport is reduced. Such modification is likely to reduce the cost of encapsulation and packaging and increase the reliability of microcircuits. 

Adhesives may substitute for wire or solder in forming electrical connections for example, in connecting capacitors, resistors, or semiconductor devices to a printed-wiring board or to a thin-film or thick-film hybrid microcircuit. The best and most... 

The Semiconductor Industry of America conducted a quality statistics program to monitor and report on industry data on various quality control indices and parameters of microcircuits from 1985 to the early... 

Hermetic Sealed so that the object is gas tight (usually to a rate of less than 1 x 10 cc/s of helium.) Joint Army Navy (JAN) When used when referring to microcircuits indicated a part fully qualified to the requirements of MIL-M-38510 for ICs (now replaced by MIL-M-38535) and MIL-S-19500 for semiconductors. JAN class B microcircuit level of the standard military drawing (SMD) program is the preferred level for design in new weapons systems. 

Metallization The deposited thin metallic coating layer on a microcircuit or semiconductor. 

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