Ceramic wiring member

Abstract

This ceramic wiring member comprises: a ceramic insulating substrate which has a first main surface and a second main surface, and in which a first layer including the first main surface and a second layer are laminated; and a conductive part which is disposed in contact with the insulating substrate and is formed from a conductor. The conductive part has an outer layer conductor which is formed on the first main surface, an inner layer conductor which is formed between the first layer and the second layer, and a lateral surface conductor which electrically connects the outer layer conductor and the inner layer conductor. The lateral surface conductor includes a lateral surface portion which is formed in contact with a lateral surface intersecting the first main surface in the first layer, a first connection portion which connects the lateral surface portion and the inner layer conductor, and a second connection portion which connects the lateral surface portion and the outer layer conductor. The first connection portion protrudes from the surface of the lateral surface portion, and the distal end of the first connection portion on the first main surface side thereof in a first direction heading from the second main surface toward the first main surface is located more toward the first main surface in comparison to the interface between the first layer and the inner layer conductor.

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