Patent ID: 9117803
Filing Date: 2015-08-25
Classification: H01L

Abstract:
1. A method for producing a semiconductor device including a semiconductor element and a wiring substrate on which the semiconductor element is mounted, the method comprising: a first step of forming vertically-through conductive wiring through an insulating substrate by shaping of a raw material for the insulating substrate in such a manner that a through hole is formed through the shaped raw material, application of a metallic material to an inner surface of the through hole, and firing of the shaped raw material; a second step of forming an adhesion layer constituting an underlying layer over a region of the insulating substrate containing the vertically-through conductive wiring, on each of an upper side and a back-side of the insulating substrate, by physical vapor deposition of a material containing an alloy of Ti; a third step of forming a mask on an area of an upper surface of the underlying layer which is predetermined to contain at least an isolation line for electrically isolating electrodes in a pair from each other; a fourth step of forming a main conductive layer by plating with a material containing a conductive material, over the insulating substrate after the underlying layer and the mask are formed; a fifth step of removing the mask; a sixth step of etching an area of the underlying layer which is exposed in the fifth step until an area of the insulating substrate under the etched area of the underlying layer is exposed; and a seventh step of forming an electrode layer by plating with a material containing a metal for the electrodes, over the insulating substrate after the main conductive layer is formed, in such a manner that the electrode layer covers side surfaces of the underlying layer and side surfaces and an upper surface of the main conductive layer which are exposed in the sixth step.