Note : Your Quotation Request will be directed to W. L. Gore & Associates.
The GORE G620 from W. L. Gore & Associates is a Laminate with Dk (Dielectric Constant) 2.8, Tg 155 Degree C, CTE x-y 55 ppm/Degree C, CTE z 55 ppm/Degree C, Thickness 0.03 to 0.06 mm. More details for GORE G620 can be seen below.
Laminate for Microwave Printed Circuit Board with Enhanced Thermal Conductivity
You can now find similar products from multiple companies on everything RF.