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DirtyPCBs support / dirty pcbs 2 layer flex pcb specifications
I would like to ask you for some more data about your flex PCBs. I'm designing a RF flex PCB. I would need full information about the stackup: all thicknesses (solder mask, copper, polyimide) and also permittivity of dielctrics (solder mask, polyimide). So that I can calculate correct impedance.
Best regards,
Matej