Reflective film laminate

A technology of reflective film and laminated body, which is applied in the field of optical mirror bodies, vehicle lamps, and lighting appliances. It can solve the problems of high reflectivity reduction of Ag film, and achieve excellent vulcanization resistance, high reflectivity, and excellent heat resistance. Effect

Inactive Publication Date: 2012-09-19
KOBE STEEL LTD
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  • Abstract
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Problems solved by technology

Furthermore, in Patent Documents 4 and 5, although a metal oxide layer is formed as a protective film, at this time, a sputtering target made of a metal oxide is used, and pinholes may be formed in the metal oxide layer.
[0006] In addition, since a protective film is formed on the Ag film, the high reflectance of the Ag film may decrease

Method used

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Examples

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Effect test

manufacture example 1～41

[0089] The substrate uses polycarbonate (PC), and the sputtering target uses a pure Ag or Ag-based alloy sputtering target with a diameter of 101.6 mm×a thickness of 5 mm. First, according to the pressure in the sputtering chamber is 1.3×10 -3 The method below Pa is evacuated. Next, by introducing Ar gas into the sputtering chamber, the pressure in the sputtering chamber is 2.6×10 -1 In the method of Pa, DC (direct current) power of 200W is applied to the electrode to generate plasma, and the sputtering target is sputtered to form a film to form the first layer. The distance between the sputtering target and the PC base was 80 mm, and it was formed while the PC base was revolving. In addition, film formation was performed at normal temperature except that the film formation temperature in Production Example 41 was set to 150°C.

[0090] The method of measuring the average content of various additive elements in the Ag-based alloy film thus formed will be described later.

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Abstract

Disclosed is a reflective film laminate, which has a pure Ag film or an Ag-based alloy film as a first layer on a base body, and an oxide film of a metal of one or more kinds selected from among Zr, Cr, Nb, Hf, Ta, V, Ni, Mo, W, Al and Si, as a second layer on the first layer. The thickness of the second layer is 0.1-10 nm, and deterioration of the reflection ratio of the reflective film laminate is 30 % or less by having the second layer provided therein. The reflective film laminate is provided with a protection film, which has a high initial reflection ratio, excellent sulfuration resistance and heat resistance, and an extremely small number of pin holes. As a result, the reflection ratio of the reflective film laminate is not easily deteriorated due to aggregation of Ag atoms of the Ag film.

Description

technical field [0001] The present invention relates to a reflective film laminate, and a vehicle lamp, lighting fixture, and optical mirror body having the reflective film laminate. Background technique [0002] Pure Ag films and Ag-based alloy films (hereinafter sometimes referred to as Ag films) are widely used as reflectors for vehicle lamps using various light sources such as halogen lamps, HIDs, and LEDs, due to their film thickness of 70 nm or more and high reflectance of visible light. membrane. However, since Ag atoms in the Ag film tend to aggregate, the surface of the Ag film may become rough and the reflectance may decrease due to aggregation. [0003] The above-mentioned causes of accumulation of Ag atoms include adsorption of sulfur components in the air to the surface of the Ag film, and exposure of the reflective film to a high-temperature environment of about 80 to 200° C. due to heat emitted from various light sources. [0004] Currently, in order to solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08B32B15/01B32B15/04C23C14/14C23C14/58F21V7/22F21Y101/00
CPCC23C14/205F21S48/1394F21V7/22G02B5/08C22C5/06G02B5/0808F21S41/37F21V7/24
Inventor 桂翔生铃木顺小林宣裕佐藤俊树
Owner KOBE STEEL LTD
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