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Subject:
FAB/DES: Resin Fill Criteria for Vias
From:
<[log in to unmask]> (Randy Reed)
Date:
Wed, 12 Jun 96 9:30:27 PDT
Content-Type:
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Good Morning Technetters -

IPC-RB-276 Paragraph 3.9.2.7 states that vias shall have 60% resin 
fill.

I understand the European community uses a higher number near 100% 
fill.  My engineering group has asked me the below questions and I have 
no words of wisdom.  So I forward the questions to you folks. 

Where did the 60% value originate from?

What reliability studies confirm the 60% value is valid?

Thanks for your help,

Randy Reed
Merix Corporation
503.359.9300
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