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:
Jan. 07, 1997
Filed:
Mar. 16, 1995
Sony Corporation, , JP;
Abstract
A spin coating device for a substrate, in which a uniform thin film can be formed by applying an application liquid to a substrate and the quality of the substrate can be further improved. The spin coating device for a substrate comprises a turntable 2 for holding and rotating a substrate 1; an application liquid supply means 4 for supplying an application liquid 3 to the rotating substrate 1: splash preventing means 20, which are arranged at the periphery of the substrate 1 held by the turntable 2, prevent the droplets of the application liquid from splashing and provide with an opening portion 10 for circulating the flow A of external air in an area ranging from the central portion toward the peripheral portion of the substrate 1 held by the turntable 2. Exhaust means 8 and 9 for exhausting air from within the splash preventing means 20 are provided.