Patent ID: 8263878
Filing Date: 2012-09-11
Classification: H05K,Y10T

Abstract:
1. A printed wiring board, comprising: a first insulating layer having a first surface and a second surface on an opposite side of the first surface, the first insulating layer having a concave portion formed in the first surface and an aperture extending from the first surface to the second surface; a first conductor circuit formed in the concave portion of the first insulating layer, the first conductor circuit comprising a wiring having a width tapered from the first surface of the first insulating layer toward the second surface of the first insulating layer; a conductive pad formed on the second surface of the first insulating layer and configured to connect to an electronic device; a first via conductor formed in the aperture of the first insulating layer and connecting the conductive pad on the second surface of the first insulating layer to the first conductor circuit formed in the concave portion of the first insulating layer in the first surface of the first insulating layer; a second insulating layer having a first surface and a second surface on an opposite side of the first surface of the second insulating layer, the second insulating layer having a concave portion formed in the first surface of the second insulating layer and an aperture extending from the first surface of the second insulating layer to the second surface of the second insulating layer; a second conductor circuit formed in the concave portion of the second insulating layer, the second conductor circuit comprising a wiring having a width tapered from the first surface of the second insulating layer toward the second surface of the second insulating layer; and a second via conductor formed in the aperture of the second insulating layer and connecting the second conductor circuit formed in the concave portion of the second insulating layer in the first surface of the second insulating layer to the first conductor circuit formed in the concave portion of the first insulating layer in the first surface of the first insulating layer, wherein the second insulating layer is laminated to the first surface of the first insulating layer.