Patent ID: 9420696
Filing Date: 2016-08-16
CPC Classification: H01L,H05K

Claim Text:
1. A method of manufacturing a wiring substrate, the method comprising, sequentially: forming a pair of core substrates, each including a first surface, a second surface located on an opposite side of the first surface, and a cavity that opens in the first and second surfaces; applying a film that covers the cavity to the second surface of each of the core substrates; adhering an electronic component to the film that is exposed in the cavity of each of the core substrates; arranging a support between the core substrates and arranging a first insulator between the support and each of the core substrates, wherein the first surfaces of the core substrates face the respective first insulator, and the first surfaces of the core substrates face toward each other and face toward the support; stacking the core substrates, the support, and the first insulators so that the first insulators form first insulation layers on the first surfaces of the core substrates, the cavities are filled with the first insulators, and the first insulators fix the corresponding electronic components to the corresponding core substrates, with the film covering the second surface of each of the core substrates; applying heat to have the core substrates, the support, and the first insulators integrated; removing the film from each of the core substrates; applying a second insulator on the second surface of each of the core substrates to form a second insulation layer on the second surface of each of the core substrates; and separating the core substrates from the support to separate the core substrates from each other.