abstract |
A wiring board is provided which includes an insulating layer; and a frame body disposed on the insulating layer. The frame body is provided with a through-hole. The insulating layer has a concave portion in one main surface on a frame body side. In a plan view of the wiring board, the concave portion has a first portion positioned at the through-hole, and a second portion which is positioned at the frame body and is continuous with the first portion. An air gap is formed between the frame body and the insulating layer in the second portion. |