We have had an enquiry from a customer regarding Rogers 4003 material and
I do have some info. on it from the material supplier in Europe. The US
supplier is Rogers Corp., Microwave and Circuit materials Division, 100
S. Roosevelt Avenue, Chandler, AZ 85226.
According to the data sheets the R4003 can be processed as FR4 material -
although the drilling parameters may be different.
I  have samples of the material being processed around our factory at
present - I will let you know how "similar to FR4" processing turns out.

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