Glass plate with oxide film and process for producing same

• US 6,866,937 B2
• Filed: 08/16/2001
• Issued: 03/15/2005
• Est. Priority Date: 08/22/2000
• Status: Expired due to Fees

• Current Assignee: Central Glass Company Limited
• Original Assignee: Central Glass Company Limited
• Inventors: Nishida, Yoshihiro, Honjo, Hiroshi, Yamamoto, Hideki, Tanaka, Katsuto
• Primary Examiner(s): STEIN, STEPHEN J
• Application Number:
  US09/930,258
• Publication Number:
  US 20020051870A1
• Time in Patent Office: 1,307 Days
• Field of Search: 428/428, 428/432, 428/433, 428/434, 428/192, 428/697, 428/702, 428/426
• US Class Current: 428/432
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: C03C 17/23 Oxides C03C17/02 takes precedence
• CPC Class Codes: C03C 17/256 Coating containing TiO2
• CPC Class Codes: C03C 2217/212 TiO2
• CPC Class Codes: C03C 2217/23 Mixtures
• CPC Class Codes: C03C 2217/71 Photocatalytic coatings
• CPC Class Codes: C03C 2218/365 Coating different sides of a glass substrate
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/24926 including ceramic, glass, porcelain or quartz layer
• CPC Class Codes: Y10T 428/265 1 mil or less

Abstract

The invention relates to a glass plate including (a) a glass substrate having a major surface divided into a central major portion and a peripheral portion surrounding the central major portion; and (b) an oxide film formed on the central major portion by baking a precursory film. The oxide film is not formed on the peripheral portion such that the peripheral portion is free from shrinkage force caused by the baking.

Claims

1. A glass plate comprising:

a glass substrate comprising a major surface divided into a central major portion and a peripheral portion surrounding said central major portion; and

an oxide film formed on said central major portion by baking a precursory film, said peripheral portion being free from said oxide film such that said peripheral portion is free from shrinkage force caused by said baking;

wherein said oxide film is a photocatalytic film comprising titania crystals such that said glass plate is provided with at least one of hydrophilicity and stain resistance.

2. A glass plate according to claim 1, wherein said photocatalytic film further comprises at least one of SiO₂, Al₂O₃ and ZrO2.

3. A glass plate comprising:

a glass substrate comprising a major surface divided into a central major portion and a peripheral portion surrounding said central major portion; and

an oxide film formed on said central major portion by baking a precursory film, said peripheral portion being free from said oxide film such that said peripheral portion is free from shrinkage force caused by said baking;

wherein said peripheral portion has a width of 15 mm or greater when said glass plate is used as a vehicular rear window glass.

4. A glass plate comprising:

a glass substrate comprising a major surface divided into a central major portion and a peripheral portion surrounding said central major portion; and

an oxide film formed on said central major portion by baking a precursory film, said peripheral portion being free from said oxide film such that said peripheral portion is free from shrinkage force caused by said baking;

wherein said glass substrate further comprises another major surface comprising a peripheral portion, said peripheral portion of said another major surface having thereon a black-color ceramic film.

5. A glass plate comprising:

a glass substrate comprising a major surface divided into a central major portion and a peripheral portion surrounding said central major portion; and

an oxide film formed on said central major portion by baking a precursory film, said peripheral portion being free from said oxide film such that said peripheral portion is free from shrinkage force caused by said baking;

wherein said peripheral portion has a width of 10 mm or greater.