Aaaaah. I've experienced something similar in the distant past when
hand-assembling prototypes and such.
The cover (epoxy?) of metal-film through-hole resistors is not as
structurally sound as one would presume.

Craig Cullum, Engineering Technologist, AMTELCO
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v: 608 838 4194, or 4197, x128

Please visit us at www.amtelco.com 
 

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting
> Sent: Friday, August 17, 2007 7:15 AM
> To: [log in to unmask]
> Subject: Re: [TN] Solder mask as an insulator - illustration posted
> 
> Good Morning folks,
> 
> I created a graphic to illustrate our "punch through" problem 
> as I don't have any photographs of the failed board/part.
> 
> Steve Gregory has posted the illustration at 
> http://stevezeva.homestead.com/files/LPI_punch_thru.jpg.  
> Thanks Steve.
> 
> Phil

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