Manufacturing method of printed wiring board and printed wiring board including potting dam obtained by using manufacturing method

Abstract

The present invention provides a manufacturing method of a printed wiring board including a potting dam of favorable shape and positional accuracy. The method includes a process A of preparing a substrate comprising a wiring pattern, a process B of providing a resin layer on a surface of the substrate comprising the wiring pattern, a process C of fluidizing the resin layer by heating and deforming the resin layer to obtain a potting dam shape using a press plate comprising a mold shape, and a process D of removing the press plate comprising a mold shape to expose the resin layer comprising a portion with the deformed potting dam shape. When required, a process E of removing unnecessary portions of the resin layer deformed to obtain the potting dam shape can be added after the process D.

Dependencies are inferred from the claim text.