Heating element and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2016278166-A1
Application number	US-201415033370-A
Country	US
Kind code	A1
Filing date	Nov 27, 2014
Priority date	Nov 29, 2013
Publication date	Sep 22, 2016
Grant date	—

Abstract

The present specification provides a heating element including an adhesive film; and a conductive heating pattern provided on at least one surface of the adhesive film and having a line height of 10 micrometers or less, and a method for fabricating the same.

First claim

1 . A heating element comprising:
an adhesive film; and a conductive heating pattern provided on at least one surface of the adhesive film and having a line height of 10 micrometers or less.

2 . A heating element comprising:
an adhesive film; a conductive heating pattern provided on at least one surface of the adhesive film and having a line height of 10 micrometers or less; and a protective film provided on at least one surface of the surface provided with the conductive heating pattern of the adhesive film, and a surface opposite to the surface provided with the conductive heating pattern of the adhesive film.

3 . (canceled)

4 . The heating element of claim 1 , further comprising an additional adhesive film provided on the surface provided with the conductive heating pattern of the adhesive film.

5 . The heating element of claim 1 , wherein a thickness of the adhesive film is 190 to 2,000 micrometers.

6 . The heating element of claim 1 , wherein a glass transition temperature (Tg) of the adhesive film is 55 to 90° C.

7 . The heating element of claim 1 , wherein a material of the adhesive film includes polyvinylbutyral (PVB), ethylene vinyl acetate (EVA), polyurethane (PU) or polyolefin (PO).

8 . (canceled)

9 . The heating element of claim 1 , wherein specific resistance of the conductive heating pattern is twice or less compared to specific resistance of a metal forming the conductive heating pattern.

10 . The heating element of claim 1 , wherein the conductive heating pattern includes a plating catalyst.

11 . The heating element of claim 1 , wherein a variation in the line height of the conductive heating pattern is 20% or less.

12 . The heating element of claim 1 , further comprising a primer layer or a cohesive layer provided at an interface of the conductive heating pattern and the adhesive film.

13 . (canceled)

14 . (canceled)

15 . A window for vehicles comprising the heating element of claim 1 .

16 . A method for fabricating a heating element including forming a conductive heating pattern having a line height of 10 micrometers or less on at least one surface of an adhesive film.

17 . The method for fabricating a heating element of claim 16 , wherein the operation of forming the conductive heating pattern having a line height of 10 micrometers or less on at least one surface of the adhesive film includes heat bonding a metal film having a thickness of 10 micrometers or less on at least one surface of the adhesive film; and forming the conductive heating pattern by patterning the metal film.

18 . The method for fabricating a heating element of claim 17 , wherein the operation of heat bonding the metal film having a thickness of 10 micrometers or less on at least one surface of the adhesive film includes forming a metal plating layer on a metal layer; laminating the metal layer provided with the metal plating pattern with the adhesive film so that the metal plating pattern contacts with the adhesive film; and removing the metal layer from the metal plating pattern.

19 . (canceled)

20 . The method for fabricating a heating element of claim 16 , wherein the operation of forming the conductive heating pattern having a line height of 10 micrometers or less on at least one surface of the adhesive film includes forming a metal plating pattern having a thickness of 10 micrometers or less on a metal layer; laminating the metal layer provided with the metal plating pattern with the adhesive film so that the metal plating pattern contacts with the adhesive film; and removing the metal layer from the metal plating pattern.

21 . The method for fabricating a heating element of claim 20 , wherein the operation of forming the metal plating pattern having a thickness of 10 micrometers or less on the metal layer includes forming a metal plating layer having a thickness of 10 micrometers or less on the metal layer; and forming the metal plating pattern by patterning the metal plating layer.

22 . (canceled)

23 . The method for fabricating a heating element of claim 20 , wherein the operation of forming the metal plating pattern having a thickness of 10 micrometers or less on the metal layer includes forming an insulation pattern on the metal layer; and forming the metal plating pattern having a thickness of 10 micrometers or less on a surface that is not covered by the insulation pattern of the metal layer, wherein the insulation pattern is removed either before being laminated with the adhesive film, or after removing the metal layer from the metal plating pattern.

24 . The method for fabricating a heating element of claim 18 , further comprising forming a primer layer or a cohesive layer on the adhesive film, or on the metal plating layer or the metal plating pattern before the lamination.

25 . (canceled)

26 . (canceled)

27 . The method for fabricating a heating element of claim 18 , wherein the lamination is carried out using a lamination process passing through a heating roll at a [glass transition temperature (Tg) of the adhesive film—10° C.] or more.

28 . (canceled)

29 . The method for fabricating a heating element of claim 20 , further comprising forming a primer layer or a cohesive layer on the adhesive film, or on the metal plating layer or the metal plating pattern before the lamination.

Assignees

• Lg Chemical Ltd

Inventors

• Seong Jiehyun
• Choi Hyeon
• Kim Sarah
• Lee Seung Heon

Classifications

• H05B1/0236

  for vehicles · CPC title

• H05B3/0014

  Devices wherein the heating current flows through particular resistances · CPC title

• H05B3/84 Primary

  Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields · CPC title

• H05B3/20

  Heating elements having extended surface area substantially in a two-dimensional [2D] plane, e.g. plate-heater (H05B3/62, H05B3/68, H05B3/78, H05B3/84 take precedence) · CPC title

• H05B2203/017

  Manufacturing methods or apparatus for heaters · CPC title