Transparent electrically conductive film

• US 4,345,000 A
• Filed: 12/15/1980
• Issued: 08/17/1982
• Est. Priority Date: 12/15/1979
• Status: Expired due to Fees

• Current Assignee: Nitto Electric Industrial Co., Ltd. (Nitto Denko Corporation)
• Original Assignee: Nitto Electric Industrial Co., Ltd. (Nitto Denko Corporation)
• Inventors: Matsui, Takao, Moriuchi, Takahiko, Kawazoe, Shozo
• Primary Examiner(s): HERBERT JR, THOMAS
• Application Number:
  US06/216,740
• Time in Patent Office: 610 Days
• Field of Search: 428/458, 428/457, 428/480, 428/938, 428/212, 428/218, 428/336, 428/697, 428/701, 427/124, 427/109, 427/126.3
• US Class Current: 428/212
• CPC Class Codes: 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
• CPC Class Codes: C08J 7/044 Forming conductive coatings; Forming coatings having anti-static properties
• CPC Class Codes: C08J 7/06 with compositions not containing macromolecular substances
• CPC Class Codes: C23C 14/086 of zinc, germanium, cadmium, indium, tin, thallium or bismuth
• CPC Class Codes: G02F 1/0102 Constructional details, not otherwise provided for in this subclass
• CPC Class Codes: H01B 1/08 oxides
• CPC Class Codes: Y10S 428/938 Vapor deposition or gas diffusion
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/24992 Density or compression of components
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/31678 Of metal
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]

Abstract

A transparent electrically conductive film and processes for the production thereof are described, said film comprising a metallic oxide wherein the metallic component comprises from 60 to 95 wt % indium and from 40 to 5 wt % tin formed on the surface of a plastic base, wherein the weight ratio of the tin to the indium changes continuously from the outer surface to the inner surface in such a manner that the ratio on the inner surface of the film is appreciably lower than the average ratio of the film and the ratio on the outer surface of the film is appreciably higher than the average ratio of the film.

Claims

1. A transparent electrically conductive film comprising a metallic oxide, wherein the metallic component comprises from 60 to 95 wt% indium and from 40 to 5 wt% tin, formed on the surface of a plastic base, and wherein the weight ratio of the tin to the indium changes continuously from the outer surface to the inner surface in such a manner that the ratio on the inner surface of the film is appreciably lower than the average ratio of the film and the ratio of the outer surface of the film is appreciably higher than the average ratio of the film.

2. A film as in claim 1 wherein the film has a thickness of from 40 to 10,000 A, a transmittance of visible light at 600 nm of at least 60%, and a surface resistivity of from 0.01 to 10⁵ kΩ

/cm².

3. A film as in claim 2 wherein the thickness is from 40 to 6,000 A, the transmittance is at least 80%, and the surface resistivity if from 0.1 to 100 kΩ

/cm².

4. A film as in claim 3 wherein the thickness is from 60 to 2,000 A, the transmittance is at least 90%, and the surface resistivity is from 0.1 to 10 kΩ

/cm².

5. A film as in claim 1, 2, 3, or 4, wherein the metallic component comprises from 65 to 90 wt% indium and from 35 to 10 wt% tin.