Infrared-ray absorption film

a technology of infrared radiation and absorption film, which is applied in the direction of thermoelectric devices, optical radiation measurement, instruments, etc., can solve the problems of high cost and the inability of gold black film to be free from high cost, and achieve the effects of low reflection factor, increased irregular reflection, and high absorption ratio

Inactive Publication Date: 2005-06-23
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an infrared-ray absorbing film with lower reflectivity compared to traditional metal films while also improving its ability to absorb infrared rays effectively. This results in better sensing capabilities for detecting objects located near them.

Problems solved by technology

The technical problem addressed in this patent is how to create a cheaper and more efficient way to use a gold black film for detecting infrared rays without requiring expensive processes like vacuum deposition.

Method used

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  • Infrared-ray absorption film
  • Infrared-ray absorption film

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Embodiment Construction

[0010] An infrared-ray absorption film according to the invention uses a porous material. The pore size of this porous material is suitably within the range of several hundreds of nm to several μm. Such a porous material is formed of carbon or a meso-porous (having a pore diameter of 2 to 50 nm) material.

[0011] The infrared-ray absorption film using the porous material is suitably formed by the steps of applying a porous material precursor solution onto a substrate by ink jet printing, etc, and then conducting sintering. Examples of such a porous material precursor solution are a solution prepared by dispersing carbon particles and resin particles in a dispersion medium and a solution prepared by dispersing resin particles in a dispersion medium containing a meso-porous skeletal material (such as a metal alkoxide), a surface active agent and water.

[0012] The pore size of the porous material in the invention is decided by burn-out of the resin particles described above.

[0013] For exa

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Abstract

The invention aims at providing an infrared-ray absorption film having a low reflection factor and a high absorption ratio equivalent to those of gold black through an economical process such as ink jet printing involving the steps of printing a porous material solution and then conducting sintering without using a vacuum process. The invention provides an infrared-ray absorption film using a porous material which suitably has a pore size within the range of hundreds of nm to several μm and is formed of a metal oxide of carbon or silica, an organic/inorganic hybrid material or a meso-porous material having the composition described above. The infrared-ray absorption film is produced by applying the porous material precursor solution onto a substrate and then conducting sintering.

Description

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Claims

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Application Information

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Owner DENSO CORP
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