# US 8,999,508 B2 · Back sheet of solar cell and manufacturing method thereof

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,999,508 B2
- Document ID: US8999508B2
- Status: Granted
- Kind: B2
- Application number: 13/059,520
- Filed: 2009-08-21
- Published: 2011-06-09
- Granted: 2015-04-07
- Earliest claimed: 2008-08-29
- Assignees: Jolywood (Suzhou) Sunwatt Co., Ltd.
- Applicants: Jianwei Lin; Zhihuang Fei; Yuzheng Zhang
- Inventors: Jianwei Lin; Zhihuang Fei; Yuzheng Zhang
- Web page: https://patentgrep.com/patent/US8999508B2

## CPC

- C08J 7/048: Forming gas barrier coatings
- B32B 5/18: characterised by features of a layer {of} foamed material
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/08: of synthetic resin
- B32B 27/30: comprising vinyl {(co)polymers; comprising acrylic (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/36: comprising polyesters
- C08J 7/0423: {with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder}
- C08J 7/043: Improving the adhesiveness of the coatings per se, e.g. forming primers (adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50)
- C08J 7/044: Forming conductive coatings; Forming coatings having anti-static properties
- H10F 19/80: Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
- H10F 19/85: Protective back sheets
- B32B 37/12: characterised by using adhesives
- B32B 2307/714: Inert, i.e. inert to chemical degradation, corrosion
- B32B 2307/7242: Non-permeable
- B32B 2309/025: Temperature vs time profiles
- B32B 2309/105: Thickness
- B32B 2310/0875: using particle radiation
- B32B 2327/12: containing fluorine
- B32B 2331/04: Polymers of vinyl acetate, e.g. PVA
- B32B 2367/00: Polyesters, e.g. PET, i.e. polyethylene terephthalate
- B32B 2457/12: Photovoltaic modules
- C08J 2367/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence)
- Y02E 10/50: Photovoltaic [PV] energy
- Y10T 428/3154: Of fluorinated addition polymer from unsaturated monomers
- Y10T 428/31544: Addition polymer is perhalogenated
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A back sheet of solar module with high adhesivity comprises a substrate (3), a layer of fluorine-based film (2), and a layer of fluoro-silicone film (1) or titanium-silicon film (4) formed between the layer of fluorine-based film (2) and the substrate (3), as well as on outer surface of the layer of fluorine-based film (2). A method for manufacturing the back sheet of solar module comprises the treatment on the layer of fluorine-based film (2) and/or substrate (3) with compound of fluoro-silicone or titanium-silicon, so as to coat a layer of fluoro-silicone film (1) or titanium-silicon film (4).

## Claims

### Claim 1

A back sheet for attachment to a solar module comprising
a substrate,
a layer of fluorine-based film defining a top surface and a bottom surface, one of which faces toward the substrate, and
fluoro-silicone material associated with the fluorine-based film and appearing at the top and bottom surfaces of the film, wherein the layer of fluorine-based film is tetrafluoroethylene homopolymer, a ternary copolymer, or chlorotrifluoroethylene, and wherein said ternary copolymer includes C2F4, C3F6, and PVDF, such that when the back sheet is attached to said solar module the fluoro-silicone material is in direct contact with said solar module.

### Claim 2 (depends on 1)

The back sheet as defined in claim 1, wherein said substrate is a substrate of PET, a substrate of a PET alloy, or a substrate of a PET composite.

### Claim 3 (depends on 2)

The back sheet as defined in claim 2, wherein said PET alloy is melt blended PET and PBT or melt blended PET and PEN with PBT or PEN of said PET alloy being 1-50 parts by mass.

### Claim 4 (depends on 2)

The back sheet as defined in claim 2, wherein said PET composite includes an inorganic oxide selected from SiO2, TiO2, Al2O3 or ZrO2, with said PET composite being 1-35 parts by mass of said inorganic oxide.

### Claim 5 (depends on 1)

The back sheet as defined in claim 1, wherein said substrate is (a) fine closed-module foam layer or (b) closed-module foamed PET having a fine closed-module foam layer with foam holes having closed and ultra fine structures.

### Claim 6 (depends on 1)

The back sheet as defined in claim 1, wherein a thickness of said substrate is 0.1 to 10 mm.

### Claim 7 (depends on 1)

The back sheet as defined in claim 1, wherein a content of fluororesin in said layer of fluorine-based film is 30-95 parts by mass.

### Claim 8 (depends on 1)

The back sheet as defined in claim 1, the back sheet consisting essentially of: the first-mentioned layer of fluorine-based film, the first-mentioned fluoro-silicone material associated with the first-mentioned film, the substrate, a second layer of fluorine-based film defining a top surface and a bottom surface, and fluoro-silicone material being associated with the second film and appearing at the top and bottom surfaces of the second film.

### Claim 9 (depends on 1)

The back sheet as defined in claim 1, the back sheet consisting essentially of: the layer of fluorine-based film, the fluoro-silicone material appearing at the top and bottom surfaces of the film, and the substrate.

### Claim 10 (depends on 1)

The back sheet as defined in claim 1, the back sheet consisting essentially of: the layer of fluorine-based film, the fluoro-silicone material, and the substrate, the substrate defining a top surface and a bottom surface with the film on one of the top surface or bottom surface of the substrate, the fluoro-silicone material appearing at the other of the top surface or bottom surface of the substrate.

### Claim 11

A back sheet for attachment to a solar module, comprising
a substrate,
a layer of fluorine-based film defining a top surface and a bottom surface, one of which faces toward the substrate,
a layer of titanium-silicon film comprising a titanium-silicon material associated with the flourine-based film and appearing at the top and bottom surfaces of the film, such that when the back sheet is attached to said solar module the titanium-silicon material is in direct contact with said solar module the layer of titanium-silicon film having a thickness of 0.01 to 5 μm.

### Claim 12 (depends on 11)

The back sheet as defined in claim 11, wherein said substrate is a substrate of PET, a substrate of a PET alloy, or a substrate of a PET composite.

### Claim 13 (depends on 12)

The back sheet as defined in claim 12, wherein said PET alloy is melt blended PET and PBT or melt blended PET and PEN with PBT or PEN of said PET alloy being 1-50 parts by mass.

### Claim 14 (depends on 12)

The back sheet as defined in claim 12, wherein said PET composite includes an inorganic oxide selected from SiO2, TiO2, Al2O3 or ZrO2, with said PET composite being 1-35 parts by mass of said inorganic oxide.

### Claim 15 (depends on 11)

The back sheet as defined in claim 11, wherein said substrate is (a) fine closed-module foam layer or (b) closed-module foamed PET having a fine closed-module foam layer with foam holes having closed and ultra fine structures.

### Claim 16 (depends on 11)

The back sheet as defined in claim 11, wherein said layer of fluorine-based film is tetrafluoroethylene, a ternary copolymer or chlorotrifluoroethylene, and wherein said ternary copolymer includes C2F4, C3F6, and PVDF.

### Claim 17 (depends on 11)

The back sheet as defined in claim 11, the back sheet consisting essentially of: the first-mentioned layer of fluorine-based film, the first-mentioned titanium-silicon material associated with the first-mentioned layer of fluorine-based film, the substrate, a second layer of fluorine-based film defining a top surface and a bottom surface, and titanium-silicon material being associated with the second film and appearing on the top and bottom surfaces of the second film.

### Claim 18 (depends on 11)

The back sheet as defined in claim 11, the back sheet consisting essentially of: the layer of fluorine-based film, the titanium-silicon material, and the substrate, the substrate defining a top surface and a bottom surface with the film on one of the top surface or bottom surface of the substrate, and the titanium-silicon material appearing at the other of the top surface or bottom surface of the substrate.

### Claim 19 (depends on 11)

The back sheet as defined in claim 11, wherein the titanium-silicon material is an organic compound.