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:
Feb. 12, 2002
Filed:
Jan. 13, 1999
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K 1/03 ;
U.S. Cl.
CPC ...
H05K 1/03 ;
Abstract
A printed circuit board is free from any residue of the carbide of resin produced on the surface of its copper foil exposed after boring a blind hole by means of a laser beam. Such a printed circuit board is adapted to have a blind hole bored through an insulator until the hole gets to the copper foil arranged under the insulator by irradiating the insulator with a laser beam. A laser beam absorbing region is provided between said insulator and said copper foil