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. 22, 2018
Filed:
Mar. 10, 2016
Disco Corporation, Tokyo, JP;
Senichi Ryo, Tokyo, JP;
Yusaku Ito, Tokyo, JP;
Tomoaki Endo, Tokyo, JP;
Yukinobu Ohura, Tokyo, JP;
Kentaro Odanaka, Tokyo, JP;
DISCO CORPORATION, Tokyo, JP;
Abstract
A method detects whether or not a workpiece is coated with a water-soluble protective film. The method includes a preparatory step before detection and a detecting step. The preparatory step includes irradiating with infrared light a first region coated with the water-soluble protective film and a second region not coated with the water-soluble protective film for a reference, receiving the reflected light, and thereby acquiring an intensity of reflection from the first region and an intensity of reflection from the second region; and a threshold determining step of determining a threshold from the intensity of reflection from the first region and the intensity of reflection from the second region at a wavenumber of 3000 cmto 3600 cm. The detecting step includes irradiating a surface of the workpiece with the infrared light, receiving the reflected light, and comparing the thus obtained intensity of reflection with the threshold.