Substrate equipped with a multilayer comprising a partial metal film, glazing unit, use and process

Patent metadata

Field	Value
Publication number	US-2017198518-A1
Application number	US-201515313623-A
Country	US
Kind code	A1
Filing date	May 22, 2015
Priority date	May 23, 2014
Publication date	Jul 13, 2017
Grant date	—

Abstract

A substrate is coated on one face with a thin-film multilayer including at least one functional metal film based on silver or made of silver having a thickness e of between 7 nm and 20 nm inclusive of these values, and two antireflection coatings each including at least one antireflection film. The functional film is placed between the two antireflection coatings. The multilayer includes a lower discontinuous metal film having a thickness e′ of between 0.5 nm and 5 nm inclusive of these values. The lower discontinuous metal film is located between the face and the only or first functional metal film as counted starting from the face.

First claim

1 - 12 . (canceled)

13 . A substrate, comprising:
a thin-film multilayer coated on one face of the substrate, the thin-film multilayer comprising at least one functional metal film based on silver or made of silver having a thickness e of between 7 nm and 20 nm inclusive of these values, and two antireflection coatings, said antireflection coatings each comprising at least one antireflection film, said functional film being placed between the two antireflection coatings, wherein said multilayer comprises a lower discontinuous metal film having a thickness e′ of between 0.5 nm and 5 nm inclusive of these values, said lower discontinuous metal film being located between said face and the only or first functional metal film as counted starting from said face.

14 . The substrate as claimed in claim 13 , wherein said multilayer comprises only one lower discontinuous metal film.

15 . The substrate as claimed in claim 13 , wherein said multilayer further comprises an upper discontinuous metal film having a thickness e′ of between 0.5 nm and 5 nm inclusive of these values, said upper discontinuous metal film being located above the only or last functional metal film as counted starting from said face.

16 . The substrate as claimed in claim 13 , wherein said discontinuous metal film is located directly on an antireflection film having a refractive index at 550 nm of at least 1.9, and directly under an antireflection film having a refractive index at 550 nm of at least 1.9, the refractive index of said antireflection film directly below being identical to the refractive index of said antireflection film directly above.

17 . The substrate as claimed in claim 13 , wherein said discontinuous metal film is located directly on an antireflection film having an optical thickness at 550 nm of between 1 nm and 8 nm inclusive of these values and directly under an antireflection film having an optical thickness at 550 nm of between 1 nm and 8 nm inclusive of these values.

18 . The substrate as claimed in claim 13 , wherein said discontinuous metal film is located directly on an antireflection film having an optical thickness at 550 nm of between 2 nm and 6 nm inclusive of these values and directly under an antireflection film having an optical thickness at 550 nm of between 2 nm and 6 nm inclusive of these values.

19 . The substrate as claimed in claim 13 , wherein said discontinuous metal film is based on silver or is made of silver.

20 . The substrate as claimed in claim 13 , wherein said antireflection coating placed under each metal functional film comprises an antireflection film of middling index made of a material having a refractive index of between 1.8 and 2.2 at 550 nm.

21 . The substrate as claimed in claim 20 , wherein the antireflection film of middling index is oxide-based or the antireflection film of middling index has a physical thickness of between 5 and 35 nm.

22 . The substrate as claimed in claim 13 , wherein said antireflection coating placed between the face and a first or the only metal functional film comprises an antireflection film of high index made of a material having a refractive index of between 2.3 and 2.7 at 550 nm.

23 . The substrate as claimed in claim 22 , wherein the antireflection film of high index is oxide-based or the antireflection film of high index has a physical thickness of between 5 and 25 nm.

24 . The substrate as claimed in claim 13 , wherein the antireflection coating placed above a first or the only metal functional film, on the side opposite the face, comprises an antireflection film of middling index made of a material having a refractive index of between 1.8 and 2.2 at 550 nm.

25 . The substrate as claimed in claim 24 , wherein the antireflection film of middling index is oxide-based or the antireflection film of middling index has a physical thickness of between 5 and 35 nm.

26 . A multiple glazing unit, comprising:
at least two substrates that are held together by a frame structure, said glazing unit separating an exterior space from an interior space, in which at least one intermediate gas-filled cavity is placed between the two substrates, at least one of the two substrates being the substrate as claimed in claim 13 .

27 . The substrate as claimed in claim 13 , wherein the lower discontinuous metal film is the only discontinuous metal film in the thin-film multilayer that is deposited on the substrate.

28 . A process comprising:
depositing at least one discontinuous metal film in a thin-film multilayer that is deposited on the substrate as claimed in claim 13 .

29 . The process as claimed in claim 28 , wherein two of the discontinuous metal films are deposited in the thin-film multilayer.

Assignees

• Saint Gobain

Inventors

• Caillet Xavier
• Lorenzzi Jean-Carlos
• Georges Benoit

Classifications

• C03C2217/734

  comprising an alternation of high and low refractive indexes · CPC title

• C03C17/36 Primary

  at least one coating being a metal · CPC title

• C03C17/3649

  made of metals other than silver · CPC title

• E06B3/673

  Assembling the units (E06B3/677 takes precedence {; making hollow glass sheets or bricks C03B23/24}) · CPC title

• C03C2217/281

  Nitrides · CPC title