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:
Jan. 20, 2004
Filed:
Aug. 16, 2000
Applicant:
Inventors:
Hiromichi Takaoka, Tokyo, JP;
Tomoyuki Akashi, Kanagawa, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 2/606 ;
U.S. Cl.
CPC ...
B23K 2/606 ;
Abstract
In a semiconductor thin film producing apparatus for irradiating a semiconductor thin film by a laser beam through an aperture pattern formed in a mask to reform the semiconductor thin film, the mask has a reflecting surface having a reflectance not smaller than 70% with respect to the laser beam. An absorbing substrate is arranged at a position before the laser beam is irradiated onto the mask. The absorbing substrate is for locally absorbing the laser beam and is for absorbing a reflected beam which is reflected by the reflecting surface of the mask when the laser beam is irradiated onto the reflecting surface of the mask.