| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed wiring board capable of satisfactorily attaining impedance matching in design of various signal lines by improving position dependency and angle dependency, and a conductor sheet for a printed wiring board for accomplishing the printed wiring board of satisfactory impedance matching.SOLUTION: A printed wiring board 11 is configured to comprise a conductor layer 16 including a conductor part 23 and a plurality of independent pattern openings 22 and a signal line formed at an upper side of the conductor part 23 via an insulation layer, and to provide the pattern openings 22 in a local region 25 in such a manner that, when assuming as a band-like virtual line having line width equal to that of the signal line a first virtual line 26 positioned to maximize a ratio of the conductor part 23 within a plane of the virtual line or a second virtual line 27 positioned to minimize the ratio of the conductor part 23 within the plane of the virtual line, an extending direction of the first virtual line 26 or the second virtual line 27 becomes non-parallel with a directional line 28 indicating a direction of disposing central positions of the plurality of pattern openings 22. |
