1947 Bipolar Transistor invented by Bardeen, Brattain and Shockley at Bell Laboratories 1958 Simultaneous Development of Integrated Circuit by Kilby at Texas Instruments & Noyce and Moore at Fairchild Semiconductor 1961 First commercial digital IC available from Fairchild Semiconductor 1967 First Semiconductor RAM (64bits) discussed at the IEEE International Solid-State Circuits Conference (ISSCC) 1968 Introduction of the first commercial IC operational amplifier the µA709 by Fairchild Semiconductor 1970 1-transistor dynamic memory cell invented by Dennard at IBM 1971 Introduction of the 4004 microprocessor by intel 1972 First 8-bit Microprocessor The Intel 8008 1974 First 1kBit memory chip, 8080 microprocessor 1978 First 16-bit Microprocessor 1984 1MBit Memory芯片