Re: Stiff PCB material?
thanks for the replies. It's ok if it's not too expensive. It just have to be available commercially. I am however constrained by having to use double sided, single layered PCB since the final design must be lowest cost possible.
i've tried using copper fill in the more sparse copper side of the board but the warpage is still dominant. i guess this is because I am using a continuous ground plane on the bottom side so there is practically no empty copper area on the bottom side of the board. all the tracks are on the top side.
hence have u used a double sided, single layered PCB substrate that is engineered to be stiffer than usual?