Laminate and its production method

• US 7,005,189 B1
• Filed: 12/27/1999
• Issued: 02/28/2006
• Est. Priority Date: 12/28/1998
• Status: Expired due to Fees

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Ohsaki, Hisashi, Tachibana, Yuko
• Primary Examiner(s): Morris, Terrel
• Assistant Examiner(s): Piziali, Andrew T
• Application Number:
  US09/857,209
• Time in Patent Office: 2,255 Days
• Field of Search: 428/336, 428/432, 428/447, 428/448, 428/450, 428/469, 428/472, 428/672, 428/673, 428/674, 428/698, 428/699, 428/701, 428/702, 427/164, 427/165
• US Class Current: 428/432
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3618 Coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic
• CPC Class Codes: C03C 17/3626 one layer at least containing a nitride, oxynitride, boronitride or carbonitride
• CPC Class Codes: C03C 17/3634 one layer at least containing carbon, a carbide or oxycarbide
• CPC Class Codes: C03C 17/3639 Multilayers containing at least two functional metal layers
• CPC Class Codes: C03C 17/3642 the multilayer coating containing a metal layer
• CPC Class Codes: C03C 17/3644 the metal being silver
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C03C 17/3676 specially adapted for use as electromagnetic shield
• CPC Class Codes: C03C 2217/78 Coatings specially designed to be durable, e.g. scratch-resistant
• CPC Class Codes: C03C 2217/948 Layers comprising indium tin oxide [ITO]
• CPC Class Codes: C23C 14/06 characterised by the coating material C23C14/0021 , C23C14/04 take precedence
• CPC Class Codes: C23C 14/083 of refractory metals or yttrium
• CPC Class Codes: C23C 14/185 by cathodic sputtering
• CPC Class Codes: C23C 28/00 Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
• CPC Class Codes: C23C 28/321 with at least one metal alloy layer
• CPC Class Codes: C23C 28/322 only coatings of metal elements only
• CPC Class Codes: C23C 28/34 including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
• CPC Class Codes: C23C 28/341 with at least one carbide layer
• CPC Class Codes: C23C 28/3455 with a refractory ceramic layer, e.g. refractory metal oxide, ZrO2, rare earth oxides or a thermal barrier system comprising at least one refractory oxide layer
• CPC Class Codes: C23C 28/42 : characterized by the composition of the alternating layers
• CPC Class Codes: G02B 5/282 : reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
• CPC Class Codes: Y10T 428/12889 : Au-base component
• CPC Class Codes: Y10T 428/12896 : Ag-base component
• CPC Class Codes: Y10T 428/12903 : Cu-base component
• CPC Class Codes: Y10T 428/265 : 1 mil or less

Abstract

A laminate having improved visible light transmittance and abrasion resistance, which comprises a substrate, and a titanium oxide layer, a metal layer and a titanium oxide layer laminated alternately in this order on the substrate in (2n+1) layers (wherein n is a positive integer), wherein an interlayer having a refractive index of less than 2.4 at a wavelength of 550 nm is interposed at at least one interlaminar boundary between the titanium oxide layer and the metal layer.

Claims

1. A laminate which comprises

a substrate, and

a titanium oxide layer, a metal layer and a titanium oxide layer laminated alternately in this order on the substrate in (2n+1) layers (wherein n is a positive integer),

wherein an interlayer having a refractive index of less than 2.4 at a wavelength of 550 nm is interposed at at least two interlaminar boundaries between the titanium oxide layer and the metal layer,

wherein each interlayer independently is a layer consisting of at least one member selected from the group consisting of a nitride, an oxynitride, a carbide, a boride, niobium oxide, GZO, and ITO,

wherein each metal layer independently is a layer containing silver as the sole or main component,

wherein the thickness of each interlayer independently is from 0.1 to 30 nm,

wherein both sides of at least one metal layer is sandwiched between interlayers,

wherein the titanium oxide layer closest to the substrate and the titanium oxide layer furthest from the substrate each independently has a thickness of from 20 to 60 nm, and all other titanium oxide layers each independently has a thickness of from 40 to 120 nm, and

which laminate contains at least two metal layers.

2. The laminate according to claim 1, wherein each of the titanium oxide layers has a refractive index of at least 2.4 at a wavelength of 550 nm.

3. The laminate according to claim 1, wherein the sheet resistance value is from 0.5 to 3.5 Ω

/□

, the visible light transmittance is at least 40%, and the visible light reflectance is at most 10%.

4. The laminate according to claim 1, wherein a resin film having a low-reflecting property is further laminated thereon.

5. The laminate according to claim 1, wherein a resin film having a near-infrared shielding property is further laminated thereon.

6. The laminate according to claim 1, wherein the visible light reflectance is at most 3%.

7. The laminate according to claim 1, which contains at least three metal layers.

8. The laminate according to claim 7, which contains at least four metal layers.

9. The laminate according to claim 1, wherein all metal layers are sandwiched between two interlayers.

10. The laminate according to claim 1, wherein each metal layer independently is a layer containing Ag—

Pd alloy (0.1 to 5 atomic % Pd).