Patent ID: 11956896
Assignee: IBIDEN CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The printed wiring board according to claim 4, wherein the first conductor circuit has a first lower surface in contact with the surface of the first resin insulating layer and a first upper surface on an opposite side with respect to the first lower surface and is formed such that the first conductor circuit has a first angle between the second side wall and the first lower surface of the second portion, a second angle between the first side wall and the first lower surface, a third angle between the second side wall of the first portion and the first lower surface, and a fourth angle between the second side wall of the third portion and the first lower surface, and the second conductor circuit has a second lower surface in contact with the surface of the first resin insulating layer and a second upper surface on an opposite side with respect to the second lower surface and is formed such that the second conductor circuit has a fifth angle between the third side wall of the fifth portion and the second lower surface, a sixth angle between the third side wall of the fourth portion and the second lower surface, a seventh angle between the third side wall of the sixth portion and the second lower surface, and an eighth angle between the fourth side wall and the second lower surface and that the second, third, fourth, sixth, seventh and eighth angles are larger than the first and fifth angles.