| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring board which is advantageous in microscopic wiring formation, electrical characteristics and manufacturing cost, and is further reliable, and is excellent in high-frequency properties. SOLUTION: This printed wiring board is composed of a conductive circuit and an insulating layer, wherein a part of the conductive circuit is formed of a metallic foil, a ten-point average roughness (Rz) in an inner layer side of the conductive circuit is 2μm or less, and the insulating layer is constituted so as to include at least two or more layers of an adhesion layer and a bulk layer. COPYRIGHT: (C)2009,JPO&INPIT
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