Thermal pressed silicon rubber sheets and manufacture thereof

A silicone rubber sheet, thermocompression bonding technology, applied in the direction of rubber layer products, chemical instruments and methods, film/sheet adhesives, etc., can solve the increase of surface roughening steps, cost increase, anisotropy Problems such as poor surface release properties of conductive adhesives, to solve pollution problems, reduce costs, and avoid adhesion problems

Inactive Publication Date: 2005-10-12
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, methods such as a transfer embossed surface after coating, a corona discharge method, or a sandblasting method have been proposed as methods for such surface roughening, but it is necessary to additionally increase the surface roughening step, and there is a silicone rubber sheet. Poor production performance and increased cost
In addition, depending on the method and degree of surface roughening, even if the problem of adhesion can be solved, there is a problem that the surface releasability of the anisotropic conductive adhesive is deteriorated

Method used

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  • Thermal pressed silicon rubber sheets and manufacture thereof
  • Thermal pressed silicon rubber sheets and manufacture thereof
  • Thermal pressed silicon rubber sheets and manufacture thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] Using a kneader, 100 parts by weight of methylvinyl polysiloxane having an average degree of polymerization of 8,000, which is composed of 99.85 mol% of dimethylsiloxane units and 0.15 mol% of methylvinylsiloxane units Oxane, 400 parts by weight of alumina powder as a filler with good thermal conductivity: alumina AL-45 (manufactured by Showa Denko (KK)), 30 parts by weight of specific surface area of ​​200m 2 Silica fine powder per g: Aerosil 200 (manufactured by Japan Aerosil (KK)) and 5 parts by weight of α, ω-dihydroxymethylpolysiloxane represented by the following formula (1), uniformly mixed, And heat treatment at 150°C for 2 hours.

[0119]

[0120] After cooling, use a twin-roller to add 0.5 parts by weight of a silicone rubber compound with a specific surface area of ​​140 m to 100 parts by weight of the silicone rubber compound. 2 / g of cerium oxide powder, 1.5 parts by weight of organic peroxide as a curing agent: C-23 (manufactured by Shin-Etsu Chemical ...

Embodiment 2

[0129] 100 parts by weight of methylvinylpolysiloxane with an average degree of polymerization of 8,000 formed from 99.85 mol% of dimethylsiloxane units and 0.15 mol% of methylvinylsiloxane units using twin rolls In alkanes, the average particle diameter of mixing 50 parts by weight is 23nm, and the BET specific surface area of ​​0.10 weight % of volatile matter is 130m 2 / g of acetylene black, the BET specific surface area of ​​5 parts by weight is 120m 2 / g of hydrophobic silica (Aerosil R-972: trade name, manufactured by Degussa Co.) and 0.5 parts by weight of BET specific surface area is 140m 2 / g of cerium oxide powder, kneading and kneading to homogenize it.

[0130] With respect to 100 parts by weight of the silicone rubber compound, 0.1 parts by weight of isopropanol solution of chloroplatinic acid (platinum content is 2% by weight), 0.1 parts by weight of ethynylcyclohexanol as a reaction inhibitor, and 1.2 parts by weight Parts of methylhydrogen polysiloxane repres...

Embodiment 3

[0137] A first silicone rubber layer with a thickness of 0.2 mm was prepared in the same manner as in Example 1.

[0138] The second silicone rubber composition was prepared in the same manner as in Example 1 except that polyorganosilsesquioxane was used to solidify the silicone resin powder with an average particle diameter of 10 μm. After heating and curing the composition at a temperature of 150°C for 5 minutes, and post-curing at a temperature of 200°C for 4 hours, the type A hardness thereof was measured as 55 by a JIS K 6253 Chow hardness tester.

[0139]The composition and molding method of the second silicone rubber layer are the same as in Example 1, the thickness of the second silicone rubber layer obtained is 10 μm, and the total thickness of the silicone rubber sheet formed by the combination of the first silicone rubber layer and the second silicone rubber layer is 0.21 mm and the same post-cured laminated silicone rubber sheet as in Example 1.

[0140] The surfa...

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Abstract

The invention provides a silicone rubber sheet for thermocompression bonding which does not stick the periphery without dusting powder, does not adhere to an anisotropic electrically conductive adhesive, is excellent in surface releasing properties and durability, is provided with flexibility, and is inexpensive, and to provide a method for manufacturing the same. The silicone rubber sheet for thermocompression bonding is manufactured by providing the second silicone rubber layer prepared by molding and curing a composition comprising (F) an organopolysiloxane, (G) a silicone powder, preferably, (H) a carbon black with a volatile content of <=0.5 mass% or (I) a fine powder silica with a specific surface area of >=50 m2 / g, and (J) a curing agent, on one face or both faces of the first silicone rubber layer prepared by molding and curing a composition comprising (A) an organopolysiloxane with an average degree of polymerization of >=200, (B) a carbon black with a volatile content of <=0.5 mass%, (C) a fine powder silica with a specific surface area of >=50 m2 / g, (D) one or more selected from metals, metal oxides, metal nitrides, or metal carbides, and (E) a curing agent.

Description

technical field [0001] The present invention relates to a silicone rubber sheet for thermocompression bonding that is uniformly stressed while transferring heat, and in particular, to a thermocompression adhesive sheet that has good mold release properties and is used for non-adhesion to surrounding device parts or objects to be pressed. Silicone rubber sheet for bonding, specifically, when forming laminated boards and flexible printed substrates, or by introducing anisotropic conductive adhesive between electrodes connected in liquid crystal panels and the like and lead electrodes of flexible printed substrates. Silicone rubber sheet for thermocompression bonding used for electrical connection and mechanical connection and its manufacturing method. Background technique [0002] In recent years, liquid crystal panels have been increasingly used as displays for mobile phones, portable computers, electronic computer controllers, video cameras, digital cameras, navigation syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B25/20B32B27/28C08K3/00C08L83/04C09J7/00C09J183/04
CPCE04G17/0644E04G17/0754
Inventor 樱井郁男桥本毅
Owner SHIN ETSU CHEM IND CO LTD
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