Patent ID: 9451700
Filing Date: 2016-09-20
CPC Classification: H01L,H05K,Y10T

Claim Text:
1. A method for producing a multi-layer substrate including sealing resin layers disposed on both of principal surfaces of a core individual substrate, the method comprising: (a) a step of mounting first surface mount devices on a first principal surface of a core parent substrate, wherein the core parent substrate includes a plurality of the core individual substrates and has through holes formed in each of the core individual substrates so as to extend therethrough; (b) a first resin layer forming step of forming a first partially cured resin layer on the first principal surface and filling the through holes with the first resin layer so that the first surface mount devices are sealed with the first resin layer; (c) a step of mounting second surface mount devices on a second principal surface of the core parent substrate, wherein the second principal surface is opposed to the first principal surface; (d) a second resin layer forming step of forming a second partially cured resin layer on the second principal surface so that the second surface mount devices are sealed with the second resin layer and the first partially cured resin layer and the second partially cured resin layer are joined and integrated to each other at a predetermined region of the through holes; (e) a main curing step of completely curing the first partially cured resin layer and the second partially cured resin layer formed on the core parent substrate; and (f) a dividing step of dividing at a predetermined position the core parent substrate provided with the first and second resin layers completely cured in the main curing step to separate the core parent substrate into each core individual substrate.