Patent ID: 8314345
Filing Date: 2012-11-20
Classification: H01L

Abstract:
1. A device mounting board comprising: an insulating resin layer; a wiring layer provided on one major surface of the insulating resin layer; and a bump electrode electrically connected to the wiring layer at the end of the wiring layer, the bump electrode being provided in the insulating resin layer, wherein the height of part of the wiring layer on the end side is lower than that of the wiring layer in an area of the wiring layer extending toward the side opposite to the end side, a surface of the bump electrode opposite to a top surface of the bump electrode is lower than one major surface of the insulating resin layer and is not covered by the insulating resin layer, and a surface of the part of the wiring layer on the end side is continuous with the surface of the bump electrode opposite to the top surface of the bump electrode so that the continuous surfaces of the part of the wiring layer and the bump electrode become a curved surface.