Patent ID: 9066439
Filing Date: 2015-06-23
Classification: H05K,Y10T

Abstract:
1. A wiring board, comprising: a first multilayer wiring board comprising a first solder-resist layer; a second multilayer wiring board connected to the first multilayer wiring board and positioned in a first opening portion formed in the first solder-resist layer of the first multilayer wiring board; and a third multilayer wiring board connected to the first multilayer wiring board and positioned in a second opening portion formed in the first solder-resist layer of the first multilayer wiring board such that the second multilayer wiring board and the third multilayer wiring board are on a same side of the first multilayer wiring board, wherein the first opening portion of the first multilayer wiring board has an opening area which is greater than a bottom surface area of the second multilayer wiring board facing the first opening portion, and the second opening portion of the first multilayer wiring board has an opening area which is greater than a bottom surface area of the third multilayer wiring board facing the second opening portion.