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:
Feb. 12, 2019
Filed:
Jun. 03, 2015
Tokyo Electron Limited, Tokyo, JP;
Katsunori Ichino, Kumamoto, JP;
Takayuki Ishii, Kumamoto, JP;
Kouzou Kawahara, Kumamoto, JP;
Daisuke Simokawa, Kumamoto, JP;
Kazuyuki Tashiro, Kumamoto, JP;
Tokyo Electron Limited, Tokyo, JP;
Abstract
Disclosed is a liquid coating method. The method executes processes of: coating a coating liquid in a spiral form on a surface of a substrate by ejecting the coating liquid from the ejection nozzle while moving the ejection nozzle in a predetermined direction between the rotary axis and a peripheral edge of the substrate during rotation of the substrate; making a linear velocity at an ejection position of the coating liquid from the ejection nozzle substantially constant by reducing a number of rotations of the substrate as the ejection position is positioned closer to the peripheral edge of the substrate; and making an ejection flow rate of the coating liquid ejected from the ejection nozzle substantially constant by changing a gap between the ejection port of the ejection nozzle and the surface of the substrate based on a flow rate of the coating liquid before ejection from the ejection nozzle.