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April 2014

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TechNet <[log in to unmask]>
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Date:
Mon, 28 Apr 2014 11:50:56 -0500
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TechNet E-Mail Forum <[log in to unmask]>, Ramakrishnan Saravanan <[log in to unmask]>
Subject:
Test coupon and PCB
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From:
Ramakrishnan Saravanan <[log in to unmask]>
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We are making pcbs for aerospace applications. Our QC informed that the test coupon used to evaluate the board shall be representative of PCB. Our PCB consist of PTH ranging from 0.7mm to 1.4mm. Also design contains power planes. 

At present test coupons contain only 0.8mm PTH which lacks representation of entire board. 

Whether we shall carryout microsection of all types of holes initial and stressed one ?.

Shall we include power planes in the test coupon ?.

diagonally opposite coupons are o.k ?.

waiting for your suggestions,

regards,

R.Saravanan

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