Bonding study of wrapping part of PA1/2

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Presentation transcript:

Bonding study of wrapping part of PA1/2 T. Morii (Kavli IPMU) 2014/01/22

Materials Used PA (Lot : 311008-02s) Sensor AIREX rev.2.0 PA1-3R. 09-17 Pad width Ave. 30.62 um, min. 28.93 um, max. 34.51um PA2-3R. 15-07 Pad width Ave. 29.15 um, min. 26.01 um, max. 33.34 um Sensor Glass DSSD (thickness : 0.3 mm) AIREX rev.2.0 Mockup origami-Z ver.5

Bonding condition 1st bond : Gold metal plate at APV side 2nd bond : PA1/2 3rd row pad Distance : 3mm Height : 0.9mm Power and force (Machine parameters) : 70 and 20 These are good bonding parameters between APV25 and PA1/2. (Studied by Kang-san and Jeon-san using pull test module) Bonding pad : 96 pads / 1 PA 2nd bond Realistic values at IPMU

Pad width 30 um 30 um Pad width (um) Pad width (um) 23 pads width are less than 30 um. 84 pads width are less than 30 um.

Wrapping condition PA1 side PA2 side

Wrapping condition PA1 side PA2 side Glue line No glue part Glue is not spread to 3rd row pads Glue looks spread to under the 3rd row pads

Pull force result PA1 w/ correction factor PA2 w/ correction factor Efficiency 99% Efficiency 100% 5.0±2.1 7.5±0.8 Pull force (g) Pull force (g) Pull force is too low (less than 4g) at some pads, because of bad glue condition. PA2 side, pull force value is enough for requirement.

Pad width V.S. pull force of PA2 Width < 27 um 27 um ≦Width < 29 um 29 um ≦Width < 30 um 30 um ≦Width Pad width = 27 to 29 um, pull force looks not so bad. Pull force (g)

Bonding foot condition V.S. pull force of PA2 PA side lift off APV side lift off PA side neck broken APV side neck broken Pull force (g)

PA1 pull force VS pad width and bonding foot condition PA side lift off APV side lift off PA side neck broken APV side neck broken Miss bonding Pull force (g) Pull force (g)

Conclusion We measured wrapping part pull force. Wrapping method is not defined, but glue is good condition at PA2 side. PA1 side, glue is not spread to 3rd row. 84 pads width are less than 30 um at PA2 but still enough pull force. 7.5±0.8 (w/ correction factor) at PA2 part, it is among the requirement. Very low pull force at PA1, because of bad wrapping condition.

Raw pull force Pull force (g) Pull force (g) Pull force w/o correction factor.