<P> The chip design started in April 1970 , when Federico Faggin joined Intel , and it was completed under his leadership in January 1971 . The first commercial sale of the fully operational 4004 occurred in March 1971 to Busicom Corp. of Japan for which it was originally designed and built as a custom chip . In mid-November of the same year , with the prophetic ad `` Announcing a new era in integrated electronics '' , the 4004 was made commercially available to the general market . The 4004 was the first commercially available monolithic CPU , fully integrated in one small chip . Such a feat of integration was made possible by the use of the then - new silicon gate technology for integrated circuits , originally developed by Faggin ( with Tom Klein ) at Fairchild Semiconductor in 1968 , which allowed twice the number of random - logic transistors and an increase in speed by a factor of five compared to the incumbent MOS aluminum gate technology . Faggin also invented the bootstrap load with silicon gate and the `` buried contact '' , improving speed and circuit density compared with aluminum gate . </P>
<P> The chip design started in April 1970 , when Federico Faggin joined Intel , and it was completed under his leadership in January 1971 . The first commercial sale of the fully operational 4004 occurred in March 1971 to Busicom Corp. of Japan for which it was originally designed and built as a custom chip . In mid-November of the same year , with the prophetic ad `` Announcing a new era in integrated electronics '' , the 4004 was made commercially available to the general market . The 4004 was the first commercially available monolithic CPU , fully integrated in one small chip . Such a feat of integration was made possible by the use of the then - new silicon gate technology for integrated circuits , originally developed by Faggin ( with Tom Klein ) at Fairchild Semiconductor in 1968 , which allowed twice the number of random - logic transistors and an increase in speed by a factor of five compared to the incumbent MOS aluminum gate technology . Faggin also invented the bootstrap load with silicon gate and the `` buried contact '' , improving speed and circuit density compared with aluminum gate . </P>
who introduced the first microprocessor for intel in 1971
who introduced the first microprocessor for intel in 1971
Federico Faggin
Federico Faggin