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. 08, 2022
Filed:
Oct. 02, 2020
Disco Corporation, Tokyo, JP;
Hideyuki Sandoh, Tokyo, JP;
Minoru Suzuki, Tokyo, JP;
DISCO CORPORATION, Tokyo, JP;
Abstract
A processing method of a wafer includes a resist film coating step of coating either one surface of a front surface and a back surface with a resist film containing an ultraviolet absorber, a laser beam irradiation step of irradiating the side of the one surface with a laser beam absorbed by the wafer and removing part of the wafer and the resist film along planned dividing lines, a plasma etching step of supplying a gas in a plasma state to the side of the one surface and removing an exposed region of the wafer exposed along the planned dividing lines through plasma etching, and a check step of irradiating plural positions on the side of the one surface of the wafer with ultraviolet rays and detecting light emission of the resist film to measure the thickness of the resist film and check a coating state of the resist film.