Metal fusion bonding – Process – With measuring – testing – indicating – inspecting – or...
Patent
1995-04-24
1997-07-29
Bradley, P. Austin
Metal fusion bonding
Process
With measuring, testing, indicating, inspecting, or...
228103, B23K 119, B23K 3102, B23K 3112
Patent
active
056514930
ABSTRACT:
A method for analyzing solder joint assemblies in devices such as solder bumped silicon chips, ball grid arrays or land grid arrays is disclosed. The method includes applying a dye solution to a device under test and then causing that dye solution to penetrate any interstices between any solder interconnect and the device under test, which also includes penetrating any fractures in any joints or joint failures. Next, the dye is dried or cured so as to provide ready analysis upon the analysis portion of the method. The device under test is then caused to be separated or fractured in such a way that a seam or border of a solder joint or an attachment border may be analyzed to identify any structural failure by visually analyzing where any dye has penetrated such structural failures.
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Andrew J. Mawer, et al., "Plastic BGA Solder Joint Reliability Considerations", Surface Mount International Conference, Aug. 28, 1994, pp. 239-251.
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Bielick James D.
Hoffmeyer Mark K.
Isaacs Phillip D.
Bradley P. Austin
International Business Machines - Corporation
Knapp Jeffrey T.
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