Hi,I want to design a Flexi-PCB Interposer to bring all traces out from a 240 BGA (16 x 15 balls. 0.4mm Pitch) to a connector, how many layers would be required to do this?Thanks.
I need to set up a differential pair of traces on a PCB for 90 ohms. I cannot find what values for epsilon I should use on the stackup page for FR4. In fact, I cannot find the epsilon value anywhere. ...
PCB available for Gadget Reboot's 'ESP and the MT8008 Analog Matrix'/'Subscriber Line Audio Matrix'? His write-up mentioned that it was available from you...