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September 2003

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Subject:
warp heatsink
From:
ricky <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 19 Sep 2003 19:03:54 -0500
Content-Type:
text/plain
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We are producing heatsink pcb and we are experiencing problems on the
flatness of the finished pcb after hotpress.We used prepreg to bond the
aluminum heatsink to the pcb.After hotpress(oil type)the heatsink warps in
both direction x & y. Does anyone please assists me on this.Heatsink is
about 3.5 mm thick and pcb is 1.7 mm.We used 2 ply 1080 of prepreg

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