Randy;

I believe that the customer is calling out for IPC-D-949. This is the
obsolete design standard that was replaced by IPC-D-275, in 1991. The solder
coat thickness, back then was 0.0003 inch. In the present standard, we call
for coverage to meet the soderability requirements og J-STD-003.

At 04:16 PM 5/2/96 PDT, [log in to unmask] wrote:
>I have a customer specification requirement to inspect solder coating 
>thickness per IPC-D-949 Class 2.  I reviewed the Design Guide and did not 
>find any solder coat thickness requirements.
>
>Where in this IPC spec is the solder coat thickness requirements?
>
>What is the relationship of IPC-D-949 and IPC-D-275?
>
>If I use the solder coat thickness in IPC-D-275, do I meet the 
>requirements of IPC-D-949?
>
>Your help is appreciated.
>
>Randy Reed
>Merix Corporation
>[log in to unmask]
>
>
Regards,

Gary Ferrari
Tech Circuits
(203)269-3311
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