Patent ID: 9301406
Filing Date: 2016-03-29
CPC Classification: G11B,H05K

Claim Text:
1. A wired circuit board, comprising: a metal supporting layer; a first insulating layer formed on the metal supporting layer; a conductive layer formed on the first insulating layer; a second insulating layer formed on the first insulating layer so as to cover the conductive layer; and a ground layer formed on the second insulating layer, wherein the first insulating layer is formed with a first opening extending therethrough in a generally circular shape in a thickness direction, the second insulating layer is formed with a second opening extending therethrough in a generally circular shape in the thickness direction to correspond to the first opening, and the first opening is surrounded by the second opening when projected in the thickness direction, and the ground layer fills the first opening via the second opening so as to come in contact with an upper surface of the metal supporting layer.