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Technology Stocks : Silicon Valley Group
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To: Dave Grady who wrote (967)9/12/1997 11:24:00 AM
From: Grant C   of 2946
 
Dave,

>>Can you elaborate on the quartz situation? Why the 9 month cure? Is this at the quartz maker or the stepper company user? Corning is the supplier of fused silica (reacted quartz vs mined), is this the contraint? How do you see this affecting the various players?<<

It takes 3 months to slowly bring the quarts up to cure temperature; then they hold this temp for 3 months; the last 3 months temp is gradually brought back to ambient. More or less a galvanizing process to ready the quarts for lens production. This probably takes place at the quarts supplier before it is shipped. Don't forget that some stepper companies make lenses in-house and some outsource such as ASML's use of Zeiss. The constraint comes with the long advance purchase time (sometimes 2 years) - makes a quick ramp difficult.
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