Nitto-denko Corporation

Hidetoshi Yoshitake

Hideo Sugawara

Tomotake Nashiki

Tomonori Noguchi

Hidehiko Andou

Yoshimasa Sakata

Toshiyuki Umehara

Tadaaki Harada

Nobuyoshi Yagi

Yuuzou Akada

A transparent conductive film comprising a transparent film base material, a resin layer having a fine uneven geometrical structure, and a transparent conductive thin film laminated on the film base material through the resin layer, wherein the surface of the transparent conductive thin film has an average centerline roughness (Ra) of 0.11 to 0.18 &#x3bc;m, the maximum height (Ry) of 0.9 to 1.6 &#x3bc;m and the average distance between peaks (S) of 0.05 to 0.11 mm. The film can prevent the formation of a Newton's ring and shows satisfactory durability (particularly, pen input durability) and satisfactory display property without buzzing.

Transparent conductive film, electrode sheet for use in touch panel, and touch panel

A transparent conductive multilayer body of the invention comprises a transparent film substrate with a thickness of 2 to 120 &#x3bc;m; a first transparent dielectric thin film, a second transparent dielectric thin film and a transparent conductive thin film laminated in this order on one side of the transparent film substrate; and a transparent substrate bonded to the other side of the film substrate through a transparent pressure-sensitive adhesive layer, wherein the second dielectric thin film is made of an inorganic material or a mixture of an organic material and an inorganic material, and the conductive thin film contains a crystalline material in which the content of crystal particles whose maximum particle sizes are at most 300 nm is higher than 50% by area. Such a transparent conductive multilayer body fully satisfies the pen input bending durability for a touch panel.

Transparent conductive multilayer body and touch panel

The transparent conductive laminate of the present invention is a transparent conductive laminate, comprising: a transparent film substrate; a transparent conductive thin film provided on one side of the transparent film substrate with a dielectric thin film interposed therebetween; and a transparent substrate bonded to another side of the transparent film substrate with a transparent pressure-sensitive adhesive layer interposed therebetween, wherein the transparent substrate comprises at least two transparent base films laminated with the transparent pressure-sensitive adhesive layer interposed therebetween, and the dielectric thin film comprises a first transparent dielectric thin film consisting of a SiO(x is from 1.5 to less than 2) film having a relative refractive index of 1.6 to 1.9, and a second transparent dielectric thin film consisting of a SiOfilm. This feature can improve the surface contact pressure durability.

Transparent conductive laminate and touch panel equipped with it

A transparent electrically-conductive film of the present invention comprises a transparent film substrate, a hard coat layer formed on one side of the transparent film substrate, a SiOlayer with a thickness of 10 nm to 300 nm that is formed on the hard coat layer by a dry process, and a transparent electrically-conductive thin layer with a thickness of 20 nm to 35 nm that is formed on another side of the transparent film substrate. The transparent electrically-conductive film has good resistance to moisture and heat and high durability against pen-based input and can be prevented from cracking during a punching process and also prevented from waving or curling even in a high-temperature, high-humidity environment.

Transparent electrically-conductive film

A transparent conductive laminated body comprising: a transparent film substrate having a thickness of 2 to 200 &#x3bc;m, and a first transparent dielectric thin film, a second transparent dielectric thin film and a transparent conductive thin film that are formed on one side of the substrate in this order from the side of the substrate, wherein the first transparent dielectric thin film is formed by vacuum deposition, sputtering or ion plating and comprises a complex oxide containing 0 to 20 parts by weight of tin oxide and 10 to 40 parts by weight of cerium oxide relative to 100 parts by weight of indium oxide, and the relationship: n&#x3c;n&#x2266;nis satisfied, where nis the refractive index of the first transparent dielectric thin film, nis the refractive index of the second transparent dielectric thin film, and nis the refractive index of the transparent conductive thin film, suppresses coloration of transmitted light and is produced with high productivity.

Transparent conductive laminated body

A transparent conductive multilayer body of the present invention is characterized by having: a transparent film base; an SiOfilm (x is no less than 1.5 and less than 2) which is provided on one surface of the above described film base in accordance with a dry process, and has a thickness of 1 nm to 30 nm and a relative index of refraction of 1.6 to 1.9; an SiOfilm which is provided on the above described SiOfilm and has a thickness of 10 nm to 50 nm; and a transparent conductive thin film which is provided on the above described SiOfilm and has a thickness of 20 nm to 35 nm.

Transparent conductive multilayer body

A process for producing a transparent conductive laminate having a completely crystallized, transparent conductive layer on a substrate comprising an organic polymer molding is provided. The transparent conductive layer is excellent in transparency and wet heat confidence, is not excessively low in specific resistivity, and has no variation on optical properties such as retardation characteristic. The transparent conductive laminate is obtained by sputter-film forming a transparent conductive layer on a substrate comprising an organic polymer molding under conditions of a substrate temperature of 80-150&#xb0; C. and a degree of vacuum of 8&#xd7;10Pa or lower to form an amorphous transparent conductive layer comprising an In.Sn composite oxide having an amount of Sn atom of 1-6 % by weight based on the total weight of In atom and Sn atom and having a film thickness of 15-30 nm, a Hall mobility of 15-28 cmV&#xb7;S, and a carrier density of 2&#xd7;10/cmto 5&#xd7;10/cm, and heat treating the layer at a temperature lower than 120&#xb0; C., to convert it into a completely crystallized transparent conductive layer having a Hall mobility of 30-45 cm/V&#xb7;S and a carrier density of 2&#xd7;10/cmto 7&#xd7;10/cm.

Process for producing transparent conductive laminate

A resin sheet that is unlikely to be affected by heat and allows prevention of the occurrence of a crack is provided. A glass fiber cloth-like material is dipped into an epoxy resin solution and subjected to curing, thereby obtaining an epoxy resin-based sheet including the glass fiber cloth-like material. The resin sheet has a haze value of 10% or lower, and preferably, has a light transmittance of 88% or higher, an in-plane retardation of not more than 2 nm, a retardation in a thickness direction of 40 nm, and a surface roughness of not more than 2 &#x3bc;m.

Resin sheet, liquid crystal cell substrate comprising the same

The present invention provides a touch panel having: a first panel board having a first base layer and a first conductive thin film disposed on one side of the first base layer; and a second panel board having a second base layer and a second conductive thin film disposed on one side of the second base layer; wherein the first panel board and the second panel board are arranged thorough a spacer so that the first conductive thin film and the second conductive thin film face each other, wherein the distance between the first conductive thin film and the second conductive thin film is from 20 to 100 &#x3bc;m, wherein the touch panel has a pushing angle of 3.9&#xb0; or less at a point distant from an electrode provided at an end portion of the first panel board by 1.5 mm.

Growing community of inventors

Ibaraki, Japan

Hidetoshi Yoshitake