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Subject:	Minimum Acceptable Solder Coverage on PCB
From:	Roger Stoops <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Fri, 6 Dec 2002 08:27:41 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (23 lines)

Greetings and Felicitations!

We currently specify a finished solder coverage for pcbs using HASL of .0003" to .002".  A vendor has stated that (according to IPC-6012, which refers to J-STD-003) for HASL the range in solder coverage is .00005" to .0001".  I was under the impression that anything under .0001" was not good due to the intermetallics from a previous TechNet discussion.  Help!!!

TIA.
Sincerely,

Roger M. Stoops, CID 
Trimble Navigation Ltd., Dayton, OH, USA
Ph: 937.233.8921  or  937.233.4574  ext 288 
Fax: 937.233.7511 

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