3 μm process
{{use dmy dates|date=March 2022}}
{{More citations needed|date=February 2014}}
{{Semiconductor manufacturing processes}}
The 3 μm process (3 micrometer process) is the level of MOSFET semiconductor process technology that was reached around 1977,{{cite web | last=Mueller | first=S | title=Microprocessors from 1971 to the Present | publisher=informIT | date=2006-07-21 | url=http://www.informit.com/articles/article.aspx?p=482324&seqNum=2 | access-date=2012-05-11 }}{{cite web | last=Myslewski | first=R | title=Happy 40th birthday, Intel 4004! | publisher=TheRegister | date=2011-11-15 | url=https://www.theregister.co.uk/Print/2011/11/15/the_first_forty_years_of_intel_microprocessors/ }} by companies such as Intel.
The 3 μm process refers to the minimum size that could be reliably produced. The smallest transistors and other circuit elements on a chip made with this process were around 3 micrometers wide.
Products featuring 3 μm manufacturing process
- Intel's 8085, 8086, 8088 CPU's launched in 1976, 1978, 1979, respectively, were manufactured using its 3.2 μm NMOS (HMOS) process. {{Failed verification|date=June 2020|reason=Source says 3μm not 3.2}}.{{Cite web |url=http://www.listoid.com/list/142 |title=History of the Intel Microprocessor - Listoid |access-date=2014-01-05 |archive-date=2015-04-27 |archive-url=https://web.archive.org/web/20150427124729/http://www.listoid.com/list/142 |url-status=dead }}{{Dubious|reason=Other sources say 3μm and not a reliable source.|date=June 2020}}
- Hitachi's 4{{nbsp}}kbit HM6147 SRAM memory chip, launched in 1978, introduced the twin-well CMOS process, at 3 μm.{{cite web |title=1978: Double-well fast CMOS SRAM (Hitachi) |url=http://www.shmj.or.jp/english/pdf/ic/exhibi727E.pdf |website=Semiconductor History Museum of Japan |access-date=5 July 2019 |archive-url=https://web.archive.org/web/20190705234921/http://www.shmj.or.jp/english/pdf/ic/exhibi727E.pdf |archive-date=5 July 2019 |url-status=dead }}
- Motorola 68000 (MC68000) CPU, launched in 1979, was originally fabricated using an HMOS process with a 3.5 μm feature size.Motorola 68000{{Circular reference|date=April 2018}}
- The ARM1 was launched in 1985 and manufactured on a 3{{nbsp}}μm process.{{cite web|title=ARM's Race to Embedded World Domination|url=http://www.realworldtech.com/arms-race/}}
References
{{reflist}}
{{Sequence|
prev=6 μm process|
next=1.5 μm process|
list=MOSFET semiconductor device fabrication process
}}
{{DEFAULTSORT:3 micrometre Process}}
Category:Computer-related introductions in 1975
{{nano-tech-stub}}