Patent ID: 7273988

Claim:
A wiring board including: a substrate comprising at least one through hole, a first surface and a second surface opposite to said first surface; a first conductive film extending on an inner wall of said at least one through hole; at least one first-side circuit wiring extending on said first surface of said substrate; at least one second-side circuit wiring extending on said second surface of said substrate; at least one first-side protection film covering said at least one first-side circuit wiring on said first surface of said substrate; at least one second-side protection film covering said at least one second-side circuit wiring on said second surface of said substrate; at least one first-side land extending on said first surface of said substrate, and said at least one first-side land extending adjacent to a first-side opening of said at least one through hole, and said at least one first-side land being connected with said first conductive film and also with said at least one first-side circuit wiring; at least one second-side land extending on said second surface of said substrate, and said at least one second-side land extending adjacent to a second-side opening of said at least one through hole, and said at least one second-side land being connected with said first conductive film and also with said at least one second-side circuit wiring; at least one first-side coating layer extending on said first surface of said substrate; and at least one second-side coating layer extending on said second surface of said substrate, wherein a gap is disposed between said at least one first-side protection film and said at least one first-side land, and a gap is disposed between said at least one second-side protection film and said at least one second-side land, and wherein said at least one first-side coating layer omnidirectionally coats an entirety of said outer peripheral region of said at least one first-side land, and said at least one second-side coating layer omnidirectionally coats an entirety of said outer peripheral region of said at least one second-side land.