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Date: | Tue, 14 Sep 2010 09:17:17 -0400 |
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Hi Chris,
These clips would put the SJs into compression—that means that even when fatigued to fracture, you will not see a functional failure.
Werner
-----Original Message-----
From: Chris Mahanna <[log in to unmask]>
To: [log in to unmask]
Sent: Mon, Sep 13, 2010 10:25 pm
Subject: [TN] Bergquist Gap Pad
We are working on a memory module FA. Sandwich looks like this:
top of clip
Ni plated Cu heat spreader (goes across all 8 BGAs)
Gap Pad
8 BGAs in a single row
board
Gap Pad
bottom of clip
Has anyone seen more than [expected] damage after natural field cycling (maybe)
caused by the gap pad? The material appears to be patented for low-modulus,
high W/mk but...
Chris
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