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. 30, 2010
Filed:
Sep. 10, 2007
Masahiro Murata, Tokyo, JP;
Hiroshi Morikazu, Tokyo, JP;
Masahiro Murata, Tokyo, JP;
Hiroshi Morikazu, Tokyo, JP;
Disco Corporation, Tokyo, JP;
Abstract
A method of carrying out laser processing along processing lines having linear portions and curved portions formed on a workpiece by using a laser beam processing machine comprising a laser beam application means for applying a laser beam to the workpiece held on a chuck table which comprises a condenser for converging a laser beam, having a focal spot changing means for changing the shape of a focal spot between an elliptic spot and a circular spot, comprising the steps of: moving a processing line formed on the workpiece to the application position of a laser beam, activating the focal spot changing means to make an elliptic focal spot and positioning the long axis of the elliptic spot along a linear portion of the processing line when the linear portion of the processing line is located at the application position of the laser beam and activating the focal spot changing means to make a circular focal spot when a curved portion of the processing line is located at the application position of the laser beam.