Kelvin Contactors for Wafer-Scale Test - Semiconductor Wafer Test ...

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BGAs Present Challenges for Kelvin contact Accuracy is Critical • Leaving Mark in Ball Apex Can Negatively Affect Solderability • Landing a Probe Too Close to Edge Can Cause Ball Shear • Decreasing Pitch Exacerbates Issues Pair of misaligned probes on 0.4 mm solder ball Probe pairs on 0.65 mm BGA June 7 to 10, 2009 IEEE SW Test Workshop 10
ECT’s Gemini Kelvin • Gemini Kelvin in Use Since 2007 • Over 150 Designs, Over 700 Contactors Shipped • Mostly In-Line (QFN/MLF) Designs • Hundreds of Thousands of Insertions per Contactor Gemini Kelvin probe pair June 7 to 10, 2009 IEEE SW Test Workshop 11
Page 1 and 2: June 7-10, 2009 San Diego, CA Kelvi
Page 3 and 4: Two Growing Test Trends Wafer-Scale
Page 5 and 6: WST a Contacting Challenge • Cont
Page 7 and 8: Kelvin: Very Useful in Final Test
Page 9: Kelvin Test at Wafer-Scale A Growin
Page 13 and 14: Example: Gemini Kelvin Contactor
Page 15 and 16: Example: Gemini Kelvin Contactor Re
Page 17 and 18: Need for Finer-Pitch Kelvin 0.5 mm
Page 19 and 20: Fine-Pitch Gemini Kelvin in Develop
Page 21 and 22: GMK030 in Wafer Scale Test June 7 t
Page 23 and 24: Issues to Overcome at Fine Pitch

Kelvin Contactors for Wafer-Scale Test - Semiconductor Wafer Test ...

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