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. 13, 2025
Filed:
Jul. 08, 2020
Disco Corporation, Tokyo, JP;
Jinyan Zhao, Tokyo, JP;
Takayuki Masada, Tokyo, JP;
DISCO CORPORATION, Tokyo, JP;
Abstract
An expanding method includes a frame securing step of securing an annular frame of a workpiece unit with frame securing means, an expanding step of, after the frame securing step, pressing a portion of an expandable sheet that lies between an outer circumferential edge of the workpiece and an inner circumferential edge of the annular frame, with an expanding drum to expand the expandable sheet, and a heating step of, after the expanding step, heating and shrinking a slackening portion of the expandable sheet which has been formed by expansion of the expandable sheet. The heating step includes a fully circumferential heating step of heating a full outer circumferential portion of the workpiece and an additional heating step of additionally heating a local area of the full outer circumferential portion of the workpiece.