The Intel 4004 has been called the first commercial microprocessor so often that the sentence can become wallpaper. Intel4004.com is more interesting because it gets into the messy part: who conceived it, who actually built it, and which manufacturing breakthroughs made the chip possible.
Visit the Intel 4004 history site
The site is built around Federico Faggin’s account of the project. Faggin joined Intel from Fairchild in April 1970 and led the implementation of the MCS-4 chip set for Busicom. His pages separate the earlier architectural proposal by Ted Hoff and Stan Mazor from the later design and development work that turned the idea into working silicon.
That distinction is the point of the site. It is not a neutral museum label. It is a technical participant arguing the historical record.
The manufacturing story matters
A large part of the material deals with silicon-gate technology, self-aligned gates, buried contacts, chip layout, and the practical problem of putting roughly 2,300 transistors into one commercially manufacturable processor in 1971.
That makes the site unusually useful. Plenty of histories say the 4004 “changed computing.” Fewer explain why the available MOS process technology was such a constraint or why Faggin’s background at Fairchild mattered to getting the design onto a chip.
The archive also includes papers, patent references, interviews, photographs, and detailed responses to accounts that Faggin believes overstate the role of others. Even if a researcher ultimately consults multiple histories, this is exactly the kind of primary-source perspective worth preserving.
For webmasters, the site is also a reminder that a narrow technical subject can support years of useful material without needing a giant publishing platform. One disputed detail leads to a patent. The patent leads to a process history. The process history leads to the entire early microprocessor industry.
This page came from the larger CacheRat Ancient Web corpus, a list of 1,967 older and unusual websites collected for research.
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The 4004 is famous. The argument over how it actually became silicon is less tidy, and therefore much more interesting.