Laminate and process for its production

• US 5,871,843 A
• Filed: 03/26/1997
• Issued: 02/16/1999
• Est. Priority Date: 03/27/1996
• Status: Expired due to Fees

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Fujita, Hiroyuki, Takeda, Satoshi, Gunji, Fumiaki, Fukawa, Makoto, Sato, Kazuo, Morimoto, Takeshi, Yoneda, Takashige, Nishimura, Hiromichi, Hayashi, Yasuo
• Primary Examiner(s): ZIRKER, DANIEL R
• Application Number:
  US08/824,290
• Time in Patent Office: 692 Days
• Field of Search: 428/315.5, 428/319.1, 428/327, 428/428, 428/429, 428/447, 428/448, 428/337, 427/162, 427/164, 427/165
• US Class Current: 428/337
• CPC Class Codes: C03C 17/007 containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
• CPC Class Codes: C03C 17/009 Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
• CPC Class Codes: C03C 17/25 by deposition from the liquid phase
• CPC Class Codes: C03C 2217/213 SiO2
• CPC Class Codes: C03C 2217/42 consisting of particles only
• CPC Class Codes: C03C 2217/77 Coatings having a rough surface
• CPC Class Codes: C03C 2218/113 by sol-gel processes
• CPC Class Codes: G02B 1/113 using inorganic layer materials only
• CPC Class Codes: Y10T 428/249978 Voids specified as micro
• CPC Class Codes: Y10T 428/266 of base or substrate

Abstract

A laminate comprising a substrate and at least one layer formed on the substrate, in which the outermost layer as a surface layer has a plurality of micropores therein and, at its surface, a flat portion and fine craters, said flat portion having a surface roughness R_a of at most 3 nm and an area ratio of at least 20%.

Claims

1. A laminate comprising a substrate and at least one layer formed on the substrate, in which the outermost layer as a surface layer has a plurality of micropores therein and, at its surface, a flat portion and fine craters, said flat portion having a surface roughness R_a of at most 3 nm and an area ratio of at least 20%, and wherein the volume ratio of the micropores in the outermost layer is from 3 to 35%.

2. The laminate according to claim 1, wherein the average size of the micropores is from 10 to 150 nm.

3. The laminate according to claim 1, wherein the average size of the craters is from 10 to 150 nm.

4. The laminate according to claim 1, wherein the outermost layer comprises an oxide of at least one metal selected from the group consisting of Si, Al, Ti, Zr and Sn, as the main component.