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January 1998

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Joe Wackerman <[log in to unmask]>
Date:
Sun, 11 Jan 1998 22:04:48 -0500
Reply-To:
"TechNet Mail Forum." <[log in to unmask]>, Gregg Klawson <[log in to unmask]>
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From:
Gregg Klawson <[log in to unmask]>
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At 03:27 PM 1/9/98 -0800, Joe Wackerman wrote:
>We have identified a problem where burrs on FET tabs cut through the
>insulator (dry grease on Kapton), and short to the heatsink. To avoid this
>possibility, we now include a quick sanding operation at part prep. Very
>labor intensive, inconsistent, wasted time..... Anyone have similar
>problems? What do you do? Any automated equipment to do this operation?
>Thanks in advance. Joe

My $0.02.  Go back to your FET supplier and have them fix the problem.
Or get another supplier.  The parts should not have this condition.  If I
had to keep my production line going I might rework some parts. Otherwise
any time we would spend on this sort of effort just eats into profits.
Besides, some FETs can be very sensitive to damage from ESD and all the
extra handling to fix this problem is only asking for more trouble.  -Gregg

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