Patent ID: 9082778
Filing Date: 2015-07-14
Classification: H01L

Abstract:
1. A semiconductor device manufacturing method comprising: forming a metal layer above a semiconductor substrate; forming a first passivation film that contacts a top surface of the metal layer and at least a portion of one side surface of the metal layer; removing a first portion of the first passivation film that is on the top surface of the metal layer such that the top surface of the metal layer is exposed; baking the first passivation film such that (i) an upper surface of the first passivation film becomes lower than the top surface of the metal layer, and (ii) a second portion of the first passivation film is in contact with the one side surface of the metal layer; and after baking the first passivation film, forming a second passivation film extending from the first passivation film to the metal layer, the second passivation film contacting the upper surface of the first passivation film and at least a portion of the upper surface of the metal layer, wherein a linear expansion coefficient of the metal layer is greater than a linear expansion coefficient of the second passivation film, and a linear expansion coefficient of the first passivation film is greater than the linear expansion coefficient of the second passivation film.