CHMOS refers to one of a series of Intel

CMOS Complementary metal–oxide–semiconductor (CMOS, pronounced "sea-moss ", , ) is a type of MOSFET, metal–oxide–semiconductor field-effect transistor (MOSFET) semiconductor device fabrication, fabrication process that uses complementary an ...

processes developed from their

HMOS In integrated circuits, depletion-load NMOS is a form of digital logic family that uses only a single power supply voltage, unlike earlier NMOS (n-type metal-oxide semiconductor) logic families that needed multiple power supply voltages. Althou ...

process. CHMOS stands for "complementary high-performance metal-oxide-silicon. It was first developed in 1981. CHMOS was used in the Intel 80C51BH, a new version of their standard

MCS-51 The Intel MCS-51 (commonly termed 8051) is a single-chip microcontroller (MCU) series developed by Intel in 1980 for use in embedded systems. The architect of the Intel MCS-51 instruction set was John H. Wharton.. Intel's original versions w ...

microcontroller. The chip was also used in later versions of

Intel 8086 The 8086 (also called iAPX 86) is a 16-bit computing, 16-bit microprocessor chip designed by Intel between early 1976 and June 8, 1978, when it was released. The Intel 8088, released July 1, 1979, is a slightly modified chip with an external 8-b ...

, and the 80C88, which were fully static version of the

Intel 8088 The Intel 8088 ("''eighty-eighty-eight''", also called iAPX 88) microprocessor is a variant of the Intel 8086. Introduced on June 1, 1979, the 8088 has an eight-bit external data bus instead of the 16-bit bus of the 8086. The 16-bit registers ...

. The

Intel 80386 The Intel 386, originally released as the 80386 and later renamed i386, is the third-generation x86 architecture microprocessor from Intel. It was the first 32-bit computing, 32-bit processor in the line, making it a significant evolution in ...

was made in 1.5 μm CHMOS III, and later in 1.0 μm CHMOS IV. CHMOS III used 1.5 micron

lithography Lithography () is a planographic method of printing originally based on the miscibility, immiscibility of oil and water. The printing is from a stone (lithographic limestone) or a metal plate with a smooth surface. It was invented in 1796 by ...

, p-well processing, n-well processing, and two layers of metal. CHMOS III-E was used for the 12.5 MHz Intel 80C186 microprocessor. This technology uses 1 μm process for the EPROM. CHMOS IV (H stands for High Speed) used 1.0 μm lithography. Many versions of the

Intel 80486 The Intel 486, officially named i486 and also known as 80486, is a microprocessor introduced in 1989. It is a higher-performance follow-up to the i386, Intel 386. It represents the fourth generation of binary compatible CPUs following the Inte ...

were made in 1.0 μm CHMOS IV. Intel uses this technology on these 80C186EB and 80C188EB embedded processors. CHMOS V used 0.8 μm lithography and 3 metal layers, and was used in later versions of the 80386, 80486, Intel486 SL and i860.Chen, Allan, "On the Air and on the Road", Intel Corporation, Microcomputer Solutions, January/February 1993. page 2

References

Electronic design Digital electronics Integrated circuits MOSFETs Intel {{electronics-stub

See also

References