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SouthWest Test Workshop 2004
June 7, 2004
FORMFACTOR, INC.
Predictive Probing Pressure Evaluation
Effects of K and Tip Size
•15 touchdowns in same spot •The low and high g/mil springs were grown from standard to large by repeated touchdowns on a controlled abrasive surface
•“High” OT for all cases.
•Tip size is dominant variable.
•
K
Tip Size
           Low                      High
Standard
Large