Patent ID: 8166648
Filing Date: 2012-05-01
Classification: H05K,Y10T

Abstract:
1. A method of manufacturing a wiring substrate, the method comprising: (a) forming a plurality of first conductor patterns and a plurality of second conductor patterns on a wiring substrate, wherein the first conductor patterns are formed on a mounting surface of the wiring substrate on which an electronic component is to be mounted; (b) forming a first insulating layer on the wiring substrate such that the second conductor patterns are covered by the first insulating layer while the first conductor patterns are exposed from the first insulating layer; (c) covering the first conductor patterns with metal layers; (d) forming a second insulating layer on the wiring substrate so as to cover the first conductor patterns covered by the metal layers and the second conductor patterns covered by the first insulating layer; (e) exposing at least top surfaces of the first conductor patterns covered by the metal layers by removing at least portions of the second insulating layer; (f) removing the metal layers so as to form grooves in the second insulating layer such that the grooves are provided along side wall surfaces of the second conductor patterns; and (g) covering each of the side wall surfaces and the top surfaces of the second conductor patterns with a corresponding one of solder layers.