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:
Jun. 30, 1992
Filed:
Jan. 02, 1990
Applicant:
Inventors:
Hideho Inagawa, Yokohama, JP;
Shigenobu Nojo, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
2191217 ; 21912176 ; 21912174 ; 21912175 ;
Abstract
A two-step boring process is disclosed. A first step of the process is high speed rough boring by thermal processing using a long wavelength laser, and a second step is an optical chemical processing using a short wavelength laser for smoothing the bore wall. A highly reliable through hole can be high speed processed in a short period of time. The bore thus formed has excellent bore wall shape while it has a very small diameter.