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Probing Lead Free Solder Bumps in Final Wafer Test

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Microelectronics<br />

Setup<br />

TEL P8XL wafer prob<strong>in</strong>g system with <strong>in</strong>tegral -10 to 140C<br />

thermal unit w/ IBM custom tester <strong>in</strong>terface with hand<br />

wired space transformer<br />

Z drive - maximum impact velocity (~40 mm/sec)<br />

SARA (Socket Analog Resistance Analyzer) (DC<br />

switch<strong>in</strong>g matrix with measurement unit)<br />

Cres Measurement method - "p<strong>in</strong> return" with 10 ma<br />

forc<strong>in</strong>g current and 5V clamp w/null<strong>in</strong>g file - to subtract<br />

path resistance<br />

Clean<strong>in</strong>g frequency - 1/wafer (>300 sites) - 5 micron<br />

abrasive material<br />

Environment - m<strong>in</strong>i-clean hood over prober<br />

Sam McKnight June 2002 Southwest <strong>Test</strong> Workshop<br />

8

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