Article View: comp.sys.ibm.pc.hardware
Article #19087Re: What's the deal? My chip says "SX-25";
From: Gary Gendel
Date: Wed, 06 Jan 1993 15:09
Date: Wed, 06 Jan 1993 15:09
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In article 25566@bmers95.bnr.ca, khor@bnr.ca (Kyle Hor) writes:
>There's a question I'd always wanted to ask. Why are wafers still made circular?
>Since the dice are rectangular, wouldn't it save material growing the crystals
>in a rectangular wafer?
The process of growing high quality silicon hasn't changed much. Basically a seed
of solid silicon is suspended in container of melted silicon. The seed is turned
and raised VERY slowly, allowing the silicon to crystalize around the seed. This
process produces very high quality crystalline structures, and by its nature
produces a salami shaped product.
Gary
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Path: arc1-ca.pugleaf.net!sparky!uunet!news.mentorg.com!sdl!sdl!usenet From: garyg@warren.mentorg.com (Gary Gendel) Newsgroups: comp.sys.ibm.pc.hardware Subject: Re: What's the deal? My chip says "SX-25"; Date: 6 Jan 1993 15:09:26 GMT Organization: Mentor Graphics Corp. -- IC Group Lines: 15 Distribution: world Message-ID: <1iesn6INNgrp@sdl.Warren.MENTORG.COM> References: <1993Jan6.142124.25566@bmers95.bnr.ca> Reply-To: garyg@warren.mentorg.com NNTP-Posting-Host: garyg.warren.mentorg.com