Patent ID: 9380707
Filing Date: 2016-06-28
CPC Classification: H01L,H05K,Y10T

Claim Text:
1. A method of manufacturing a wiring substrate, the method comprising: preparing a laminated plate in which a metal layer and an insulating layer are laminated; adhering the laminated plate to a first support body with the metal layer facing the first support body; forming a first wiring layer including vias that extend through the insulating layer and first pads exposed from a first surface of the insulating layer; separating from the first support body a multilayer structure including the metal layer, the insulating layer, and the first wiring layer; adhering the multilayer structure to a second support body with the first wiring layer facing the second support body; removing the metal layer with the second support body supporting the first wiring layer and the insulating layer; forming a plurality of second wiring layers including second pads that are connected to the vias and exposed from a second surface of the insulating layer that is opposite to the first surface; and separating the insulating layer, the first wiring layer, and the plurality of second wiring layers from the second support body to obtain the wiring substrate.