Thick conductor built-in type printed wiring board and method for producing same
摘要
說明書
It is preferable that at least one surface of first circuit 12 is a matte surface. In this case, one surface of first circuit 12 may be a matte surface and the other surface thereof may be a shiny surface, or both surfaces of first circuit 12 may be the matte surface. When the matte surface of first circuit 12 is disposed to face insulating layer 11, peel strength between first circuit 12 and insulating layer 11 in thick conductor built-in type printed wiring board 1 can be improved due to an anchor effect.
Ten-point average roughness (RZJIS) of the matte surface of the first circuit is not specifically limited, but ranges preferably from 0.5 μm to 5.0 μm, inclusive. Ten-point average roughness (RZJIS) of the shiny surface of the first circuit is not specifically limited, but ranges preferably from 0.5 μm to 2.5 μm, inclusive. On the matte surface, larger number of irregularities that are more precise than those on the shiny surface are formed as compared with the shiny surface.
