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Technology Stocks : WDC/Sandisk Corporation

WDC 155.64

-2.7%

Dec 3 3:59 PM EST

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To: Ausdauer who wrote (21180)	11/15/2001 11:00:07 PM
From: wily	Read Replies (1) of 60323

What is the deal with endurance on this technology? Copying to SI from the original article loses the exponentiation -- endurance is 10^12 cycles compared to 10^6 or 10^7 for Flash. I'm not immediately encouraged by Intel farming out the chip design work, but I need to hear more. Does anyone know how SNDK manufactures... ...a 16 or 32 or 64 MB CompactFlash card with a 1.0 gigabit flash chip? Is this the "chop-chop" process Eli mentioned? I doubt they do this. The bulk of their production is probably 256Mb, and the 1Gb chips are probably used only in the more expensive, largest density cards. The higher the density of a chip, the lower the yields and thus the higher the cost. Here's a picture showing how yields work: frontiernet.net The red star is a defect. On a wafer with only one chip (an exaggerated 'extreme' case) you lose the entire wafer. On a wafer with many small chips, yield loss to the one defect is low on a percentage basis. wily

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