| |  | Author | Message | | | yangandjiao | | Posted: Tue Jul 01, 2008 2:49 am Post subject: ULSI, WSI, SOC | | | | Joined: 23 Apr 2008 Posts: 65 | To reflect further growth of the complexity, the term ULSI that stands for "Ultra-Large Scale Integration" was proposed for chips of complexity more than 1 million of transistors. However, there is no qualitative leap between VLSI and ULSI, hence normally in technical texts the "VLSI" term covers ULSI as well, and "ULSI" is reserved only for cases when it is necessary to emphasize the chip complexity, e.g. in marketing.
The most extreme integration technique is wafer-scale integration (WSI), which uses whole uncut wafers containing entire computers (processors as well as memory). Attempts to take this step commercially in the 1980s (e.g. by Gene Amdahl) failed, mostly because of defect-free manufacturability problems, and it does not now seem to be a high priority for the industry.
The WSI technique failed commercially, but advances in semiconductor manufacturing allowed for another attack on IC complexity, known as System-on-Chip (SOC) design. In this approach, components traditionally manufactured as separate chips to be wired together on a printed circuit board are designed to occupy a single chip that contains memory, microprocessor(s), peripheral interfaces, Input/Output logic control, data converters, and other components, together composing the whole electronic system. | |
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| sophia86 | | Posted: Wed Jul 02, 2008 2:37 am Post subject: want to buy IC | | | | Joined: 02 Jul 2008 Posts: 4 | | seems you know many things about electronic,so would you please tell me a good place for IC trade,thank you | |
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| yangandjiao | | Posted: Thu Jul 03, 2008 1:36 am Post subject: here are the places | | | | Joined: 23 Apr 2008 Posts: 65 | |
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