PRINTED WIRING BOARD

摘要

A printed wiring board is disclosed which comprises an insulating layer (11, (12)), at least one resistor device (311, (312)), and a conductive pattern (351, (352)). The resistor device (311, (312)) mainly contains a metal, and has an arithmetic surface roughness of 0.5-5 mum in one surface (in the -Z direction) and an average thickness of 5-50% of the arithmetic surface roughness. The resistor device (311, (312)) is embedded in one surface (in the -Z direction) of the insulating layer (11) so that the one surface of the resistor device forms a wiring surface for conductive pattern together with the one surface of the insulating layer (11). The conductive pattern (351, (352)) is formed on the wiring surface and connected to a terminal portion of the resistor device (311, (312)). By having such a structure, the printed wiring board can have a built-in resistor device which has stable, high-precision resistance over a wide resistance range.