Patent ID: 8945336
Filing Date: 2015-02-03
Classification: H01L

Abstract:
1. A wiring substrate comprising: an adhesive layer including a first surface and a second surface that is opposite to the first surface; a wiring layer formed on the first surface of the adhesive layer; and a support substrate formed on the second surface of the adhesive layer, wherein the wiring layer is partially exposed in a through hole extending through the adhesive layer and the support substrate in a thickness-wise direction, and the support substrate is adhered to the adhesive layer in a removable manner such that the support substrate is peelable from the adhesive layer, wherein the adhesive layer is a thermally cured adhesive layer that has a first adhesive force that adheres the wiring layer to the adhesive layer and a second adhesive force that adheres the support substrate to the adhesive layer, and the first adhesive force is stronger than the second adhesive force.