First Solar - JMP
First Solar - JMP
First Solar - JMP
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My <strong>First</strong> Success Story using <strong>JMP</strong><br />
Introduced to <strong>JMP</strong> in 1993 by Tom Little while at Read-Rite Corp in Milpitas CA<br />
Used <strong>JMP</strong> to visualize the interactions between OW, PW50, Amplitude and Resolution<br />
and their inter-relationships to Throat Height<br />
Throat Height, for an inductive write-read head, is one of the most critical design<br />
dimensions<br />
DEC RZ28L was “starved” for OW – Yields were 27% - breakeven yields 55%<br />
The common tribal knowledge suggested going short as possible<br />
After not more than 20 minutes of data analysis using <strong>JMP</strong> was able to establish that<br />
the TH was far too short (Multivariate tool with brushing)<br />
• But Kuhn Steve – we need more OW not less!<br />
• Get a refund from Cal Poly<br />
Yields with the longer TH were greater than 73%!<br />
Standardized the method for a non destructive Throat Height optimization<br />
Pradip Thyamballi improved the magnetic models to include the interactions with<br />
media and spacing<br />
<strong>JMP</strong> became the undisputed program of choice – extends to many engineers in S.E.<br />
Asia including Western Digital today<br />
MD-5-921 US October 2007 34
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