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:
May. 28, 2002
Filed:
Sep. 21, 2000
Sony Corporation, Tokyo, JP;
Abstract
Disclosed is a method capable of producing, at a high throughput, a large-area FPD such as a liquid crystal display panel or O-ELD having a horizontal scanning circuit portion including a TFT characteristic having a high drive current (a high mobility), and a pixel portion and a vertical scanning circuit portion each of which contains crystal grains excellent in uniformity. The method includes the steps of: irradiating a location, in which a horizontal scanning circuit equivalent portion is to be formed, of an amorphous silicon thin film panel to be crystallized with 10 to 30 shots of a laser beam having a uniform energy density distribution and having a rectangular shape of a long-side larger than a width of the amorphous silicon thin film panel and a short-side larger than a short-side of the horizontal scanning circuit equivalent portion, in a state in which a relative positional relationship between the amorphous silicon thin film panel and the laser beam is fixed; and irradiating a location, in which a vertical scanning circuit portion and a pixel portion are to be formed, of the amorphous silicon thin film panel with the laser beam while moving the laser beam relative to the amorphous silicon thin film panel along the length direction of the amorphous silicon thin film panel.