Patent ID: 11917756
Assignee: IBIDEN CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for manufacturing a printed wiring board, comprising:
forming a plurality of metal posts on a conductor circuit formed on a resin insulating layer;
forming an outermost resin layer on the resin insulating layer such that the metal posts is embedded in the outermost resin layer;
forming a mask at a dam formation site for a dam structure of the outermost resin layer to surround at least part of a pad group comprising the plurality of metal posts on the outermost resin layer; and
reducing a thickness of the outermost resin layer exposed from the mask such that end portions of the metal posts are exposed from the outermost resin layer, that the plurality of metal posts forms the pad group, and that the outermost resin layer has the dam structure forming part of the outermost resin layer and formed to surround at least part of the pad group comprising the plurality of metal posts.