Patent ID: 8053175
Filing Date: 2011-11-08
Classification: H05K

Abstract:
1. A method of forming measuring targets for measuring the dimensions of a substrate during a substrate manufacturing process, comprising: (a) providing a board, wherein the board comprises a base layer and a first conductive layer, and the first conductive layer is disposed on a surface of the base layer; (b) forming at least one through hole on the board as a measuring target for measuring the dimensions of the substrate; (c) forming a plated via in the through hole as another measuring target for measuring the dimensions of the substrate; (d) forming a dielectric layer on the board and directly on the plated via, wherein the dielectric layer is filled into the through hole to completely fill up the through hole; and (e) removing the dielectric layer above the plated via to expose the plated via as a next measuring target for measuring the dimensions of the substrate.