Hi Inge!

5 grams per square mil average shear for gold ball bonding
Avg - 3 x StdDev > 3 grams for 1 mil gold destructive pull test

The latter is kind of vague because the wire set must be large enough to get a good sample size and all of the loops have to have reasonable heights and must be similar.

For aluminum, we're very application-dependent, but use the Avg - 3 x StdDev as the parameter of interest.

These don't test how close to cratering we are, which is an industry-wide issue.

Visually, we are looking for a consistent rim on the ball, and a rim height no greater than about one half of the wire diameter.  For the stitch, consistency and virtually no capillary imprint from the stitch process on the lead/land.

Wayne

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge
Sent: Wednesday, June 16, 2010 1:58 PM
To: [log in to unmask]
Subject: [TN] ?

What standards do you use for inspection and qualification of wire bonding
today?
Thanks
IInge


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