Patent ID: 8642444
Filing Date: 2014-02-04
Classification: H01L,H04N,Y10T

Abstract:
1. A method of manufacturing a bonded substrate, comprising the steps of: forming a first bonding layer on a surface on one side of a semiconductor substrate; forming a second bonding layer on a surface on one side of a support substrate; adhering the first bonding layer and the second bonding layer to each other; a heat treatment for bonding the first bonding layer and the second bonding layer to each other; thinning the semiconductor substrate from a surface on the other side of the semiconductor substrate to form a semiconductor layer; a step of forming an electronic circuit in or on at least one of the semiconductor substrate and the support substrate; a step of forming a first contact penetrating the first bonding layer and connected to the electronic circuit of the semiconductor substrate, and a step of forming a second contact penetrating the second bonding layer and connected to the electronic circuit of the support substrate, before the step of adhering the first bonding layer and the second bonding layer to each other, wherein a layer having silicon carbide or silicon carbonitride is formed on a surface of at least either one of the first bonding layer and the second bonding layer, in at least either one of the first bonding layer forming step and the second bonding layer forming step, wherein a layer having silicon carbide or silicon carbonitride is formed on a surface of an area, exclusive of the areas of the first contact and the second contact, of at least either one of the first bonding layer and the second bonding layer in at least either one of the first bonding layer forming step and the second bonding layer forming step, and the first contact and the second contact are electrically connected to each other in the step of adhering the first bonding layer and the second bonding layer to each other.