An Interview with Michael Qiu 采访邱学丞
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Die Attach
X-rays On Your Mind?
Anyone working with BGA solder joint reliability should be used to X-ray detection, made possible by Si-Li and Ge-Li......
What's Acceptable?
Unacceptable voiding under a die With less voiding under a power die, more heat can be dissipated through the solder into......
Die Attach Paste Alternative
We are looking into a way to deposit solder on a typical die attach machine without using die-attach paste – and without a tooling change. This...
Die-attach Stresses
Soft solders are used instead of hard solders in applications were there are large coefficient of thermal expansion mismatches between semiconductor d...
I Make House Calls
If you need me to troubleshoot your ball attach process, PoP process, flip-chip assembly process, or die-attach process, I’d be happy to come an...
Dispensing Die-Attach Solder Paste
The picture shows a “Dispensing Component Kit”. I find this is extremely helpful in quickly verifying your powder/needle combination. This...
Conductive Epoxy
Conductive epoxy is a polymer matrix with flakes of silver mixed into it. These silver flakes span a distance of about 40 microns or less. The silver....