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Electrically conductive adhesive tape

A technology of adhesive tape and conductivity, which is applied to the conductive layer on the insulating carrier, film/sheet adhesive, adhesive, etc., can solve the problems of decreased electrical conductivity and increased contact resistance, and achieve stable electrical conduction sexual effect

Active Publication Date: 2012-11-14
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the above-mentioned conductive adhesive tape is used for the internal wiring of the electronic device, etc., the contact resistance of the portion where the conductive adhesive tape is pasted gradually increases, resulting in a problem that the electrical conductivity decreases over time.
It can be seen that the current situation is that there is no conductive adhesive tape that can exert stable electrical conductivity when used for a long time or under harsh environmental conditions.

Method used

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  • Electrically conductive adhesive tape
  • Electrically conductive adhesive tape
  • Electrically conductive adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0153] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

manufacture example

[0155] 97 parts by weight of n-butyl acrylate (BA) and 3 parts by weight of acrylic acid (AA) as monomer components, 0.2 parts by weight of 2,2'-azobisisobutyronitrile as a polymerization initiator, and toluene as a polymerization solvent 27 parts by weight were put into the flask, and stirred for 1 hour while introducing nitrogen gas. Oxygen in the polymerization system was removed by such an operation, the temperature was raised to 63°C and reacted for 10 hours, and toluene was added to adjust the concentration to obtain an acrylic polymer solution with a solid content concentration of 30% by weight. The weight average molecular weight of the acrylic polymer in the acrylic polymer solution is 500,000.

[0156] Preparation example of adhesive composition solution

[0157] To the acrylic polymer solution obtained above, 2 parts by weight of an isocyanate crosslinking agent (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name "Corone 1 トL") and mixed them to pr...

Embodiment 1

[0161] Tape the conductive adhesive tape out from the roll-shaped winding body obtained above, and use Figure 11 The pattern shown (h=2.598mm, i=1.5mm) is configured on the surface with Figure 9 and Figure 10 The male mold roll of the pin (c=1.0427mm, d=1.8061mm, e=60°, f=1.2mm, g=0.1mm) of the shape shown and the surface formed with Figure 12 In the shown female roll with a cylindrical hole of diameter 1.6 mmφ x depth 1.4 mm, the tape for conductive adhesive tape is placed in such a manner that the metal foil side of the tape for conductive adhesive tape is in contact with the male roll By punching between the rolls (male roll and female roll), protrusions (burrs) of the metal foil are formed on the through holes and the surface on the adhesive layer side.

[0162] Then, peel off the release paper, such as Figure 15 As shown, make the scraper (material: iron (FK4), front end angle: 45°, front end R (front radius): 0.5) at the angle formed by the surface of the adhesiv...

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Abstract

Disclosed is an electrically conductive adhesive tape which can exhibit steady electrical conductivity even when used for a long period or when used under severe environmental conditions. The electrically conductive tape has an adhesive layer on one surface side of a metal foil, and is characterized in that the maximum resistivity value in the 1st cycle is 1 omega or less and the maximum resistivity value in the 200th cycle is higher by 5 times or less than the maximum resistivity value in the 1st cycle as measured in a heat cycle test.

Description

technical field [0001] The present invention relates to a conductive adhesive tape. More specifically, the present invention relates to a conductive pressure-sensitive adhesive tape for applications such as making electrical conduction between two spaced sites. Background technique [0002] The conductive pressure-sensitive adhesive tape has electrical conductivity (especially electrical conductivity in the thickness direction), and is used for applications such as electrical conduction between two spaced parts, electromagnetic wave shielding applications, and the like. As such a conductive adhesive tape, conventionally known, for example, includes a metal foil and an adhesive layer (pressure-sensitive adhesive layer) provided on one side of the metal foil, and on the adhesive layer-covered side of the metal foil A conductive adhesive tape (for example, refer to Patent Documents 1 to 4) that penetrates the adhesive layer and has a conduction portion at its tip, and a conduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J201/00H01B5/14C09J7/28
CPCC09J7/0292C09J2201/20C09J2203/326C09J2201/606C09J7/28Y10T428/2804C09J2301/18C09J2301/302C09J201/00H01B5/14C09J2301/314C09J2301/16C09J2203/00
Inventor 大学纪二中尾航大村上亚衣野中崇弘玉井弘宣武藏岛康中野真也平慎太郎大塚哲弥
Owner NITTO DENKO CORP