DOUBLE SIDES BOARD flexible, compact, light, insulated stable conveying, ... + HDI)Description:4- LayMaterial Base Film:1 mil with 1/2 oz CuCover Film:1 milFinished:Au / NiL ... as flexible printed circuit board. Cover flexible base board with dry film, and then produce circuit after being ... printed circuit board, the flexible boards are better with advantages of being compact and light,. The function ...