Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Multilayer PTFE Boards

#6165

Multilayer PTFE Boards | 18 December, 2000

What are the issues with fabricating multilayer PTFE boards? Are these compare with the issues of throught holes and vias in PTFE boards? If not what are these issues?

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Charles Harper

#6166

Re: Multilayer PTFE Boards | 18 December, 2000

The major problems are poor layer to layer bond strength(due to surface tension of most fluoropolymers),and poor cold flow,or dimensional creep of these materials.Please also click on Chapter Author Konsowski,listed above.E-mail form will pop up when you click.

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markt

#6167

Re: Multilayer PTFE Boards | 20 December, 2000

What steps are presently being taken by manufacturers to deal with problems such as layer bond strength, cold flow, and dimensial creep at present? Are there substantial materials research efforts, that you are aware of, in progress that address these areas of concern?

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Charles Harper

#6168

Re: Multilayer PTFE Boards | 20 December, 2000

With basic fluorochemical polymers,these problems are inherent,and there is little that can be done on a practical basis.However,Gore,Rogers (www.rogers-corp.com)and Taconic(www.taconic-add.com)have modified PTFE based materials which improve these problem areas greatly.I suggest contacting their technical service people to discuss their current products.Also,Chapter Author Gipprich has experience with some of these products.Click on his name listed at the top of this Forum,and submit some questions to him.

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