Patent ID: 9210807
Filing Date: 2015-12-08
Classification: H01L,H05K,Y02P

Abstract:
1. A wiring substrate comprising: a connection pad having a first surface; a protective insulation layer formed on the first surface of the connection pad and having an opening portion therein, wherein a portion of the first surface of the connection pad is exposed from the opening portion; a metal layer having a lower surface facing the first surface of the connection pad and an upper surface opposite to the lower surface and formed on the first surface of the connection pad which is exposed from the opening portion, the metal layer comprising a raised portion that extends upward from the upper surface of the metal layer in a peripheral portion thereof; and a bump electrode formed on the upper surface of the metal layer, wherein the protective insulation layer comprises a protrusion portion that extends from an inner wall of the opening portion in a lower portion of the protective insulation layer, wherein a slope of the protrusion portion is less than a slope of the inner wall in an upper portion of the protective insulation layer.