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Technology Stocks : Disk Drive Sector Discussion Forum
WDC 168.90+4.9%Dec 5 9:30 AM EST
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To: Stitch who wrote (2555)2/24/1998 8:25:00 PM
From: MKL  Read Replies (1) of 9256
 
Here is some information from TrendFocus regarding industry yields
(on TF inductive). MR yields would be much lower.

Processing Step: 2 layers 3 layers 4 layers
---------------- -------- -------- --------

Wafer Probe test 95-98% 70-86% 48-65%
Row/bar slicing, test 85-90% 72-82% 68-80%
Slider 88-95% 85-92% 80-88%
HGA Assembly 93-98% 87-91% 83-88%
Dynamic test 96-99% 92-95% 85-93%
Head Stack Assembly 95-99% 94-97% 93-96%

Cumulative Yields 61-80% 33-54% 18-40%

I have heard that some manufacturers are getting yields of 10-20%
for MR heads.

Happy Investing
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