TV and other consumer products, over 70 year old material. Cannot make a pth. Can make double sided with jumper wires, not common. Lousy tolerances compared with modern materials.

CEM3 is chopped fiberglass in epoxy. Can make pth. It took sometime for assemblers not to lift pads. Material selected for rf product made in China, 10 million units per year. Product designed by rf company in NY.


Gerry Gagnon <[log in to unmask]> wrote:
>Hi David,
>
>You know CEM1 is an epoxy-paper reinforced laminate right?
>
>________________________________________
>From: TechNet <[log in to unmask]> on behalf of David Hillman <[log in to unmask]>
>Sent: Tuesday, April 19, 2016 8:35 AM
>To: [log in to unmask]
>Subject: Re: [TN] CEM-1 material suitable for PTH technology
>
>Hi Lawrence - is the CEM-1 brittle or just not thermally robust?
>
>Dave
>
>On Tue, Apr 19, 2016 at 4:00 AM, Lawrence Dzaugis <[log in to unmask]>
>wrote:
>
>> CEM3 can be used. Cheap, easily damaged. Takes some practice compared to
>> FR4.
>> Never used CEM1 for anything other than unplated holes. Jumper wires used
>> to route traces.
>>
>> MPH <[log in to unmask]> wrote:
>> >Hello everyone,    We are challenge on PTH application for CEM-1
>> material, does anyone has any ideas on this?
>> >
>> >Best regardsPhoil. M
>> >
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