The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 2013
Filed:
May. 02, 2012
Hirohito Watanabe, Sakura, JP;
Taiji Ogawa, Sakura, JP;
Eriko Tomonaga, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
Quickly making changes to etching conditions suppresses the production yield of printed wiring boards from being deteriorated. Disclosed is a method comprising: an etching step that comprises: preparing a conductor-clad base material continuous in a certain direction, the conductor-clad base material () having an insulating layer and one or more conductive layers formed on main surfaces of the insulating layer; and subjecting a predetermined region of a conductor layer of one main surface of the conductor-clad base material () to an etching process thereby to form a wiring pattern () to be of a product and an inspection pattern () to be used for inspection; a measuring step that measures a line width of the inspection pattern after the etching step; and a control step that controls an etching condition in the etching step based on the measured line width.