John,

Wow, That seems an excessive amount of work for a heat sink finish.  What is driving you to go to this level of finish?

We have upped or tightened our heat sink surface specs at quite a significant cost and I can't say that it has made a significant improvements in performance for the cost.  I believe that the biggest offender for us has been contaminates (dirt, metal chips) under the Isostrate thermal transfer material that has caused a punch through during a Hi-pot test.

Phil Nutting

-----Original Message-----
From: Grabski III, John R. [mailto:[log in to unmask]]
Sent: Monday, February 24, 2003 10:15 AM
To: [log in to unmask]
Subject: [TN] off topic, more plating (kinda)...


We have a roll of silver solder in house, and I want to try a little project
with a couple heatsinks...

One's copper, the other is aluminum...  They've been lapped, and have
near-mirror finish...  I'd like to take 1/32" off both and drop on an even
coat of this silver solder...  I don't know how well they will bond, and
wonder if some chemicals will need to be used to aid in the bonding
process...

Or do I just let it drip onto the surface??

After the silver's on there, I'm gonna lap THAT finish to mirror-ish quality
and run some temperature tests...

Any advice??

Best Regards,
John Grabski III
Badger Technologies, Inc.

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