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Don't laminate it at all, The thickness you have designated is typical
for conformal coating. This has the added benefit of insulating all of
the plated through solder joints.
______________________________ Reply Separator _________________________________
Subject: Insulating layer
Author: [log in to unmask] at internet
Date: 11/1/96 9:42 AM
Anyone,
We have an application on a 2 layer board with through hole
technology which requires an insulating material
laminated/applied to one surface/side. Initially we thought
of having a prepreg material laminated to one surface but are
unsure if this is the most cost effective method. Anyone out
there who knows of a method or material which would support
this requirement please respond.
Some of our requirements are;
1. Must be a UL recognized material
2. Must provide at least 500V of dielectric insulation
3. Would preferably be thin, .001-.003 thick.
Some questions we have are;
1. What type of relief would be needed around PTH?
2. How thick would the material need to be?
3. Who is doing this type of fabrication today?
4. Can it be applied selectively?
5. What is the typical cost impact to a double sided board?
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