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Novel adhesive sticker with viscous force reduced after UV illumination and preparation method thereof

A new type of sticky technology, applied in the direction of adhesive types, ester copolymer adhesives, non-polymer adhesive additives, etc., which can solve the problems of high defect rate, high initial viscosity, and easy downtime.

Active Publication Date: 2019-01-11
深圳深汕特别合作区昌茂粘胶新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at this problem, the present invention provides a novel self-adhesive with reduced viscosity by UV irradiation and a preparation method thereof. The prepared self-adhesive has a higher initial adhesive force, and can quickly reduce the adhesive force after UV irradiation to achieve natural The degree of shedding will not remain on the wafer body, which solves the problem of high defect rate and prone to downtime during electronic product processing and electronic wafer cutting operations

Method used

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  • Novel adhesive sticker with viscous force reduced after UV illumination and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] A new type of self-adhesive for reducing viscosity by UV light, which is characterized in that it includes a release backing paper and an outer adhesive layer, wherein the outer adhesive layer includes an acrylic pressure-sensitive adhesive with a molecular weight of 500,000-600,000 and an ultraviolet light area of ​​250 -420nm free radical photoinitiator and isocyanate, the thickness of the outer adhesive layer is 18-25um; the mass ratio of the acrylic pressure sensitive adhesive, isocyanate and free radical photoinitiator is 100:2.2:16; the release backing paper 80g glassine backing paper with release liner was used for coating.

[0021] The outer adhesive layer also includes a triarylsulfonium salt photoinitiator I-160, and the mass ratio of the triarylsulfonium salt photoinitiator I-160 to the free radical photoinitiator is 1.2:5. The free radical photoinitiator is a hydrogen abstraction type photoinitiator BP. The outer adhesive layer also includes nano-lanthanum ...

Embodiment 2

[0024] A new type of self-adhesive for reducing viscosity by UV light, which is characterized in that it includes a release backing paper and an outer adhesive layer, wherein the outer adhesive layer includes an acrylic pressure-sensitive adhesive with a molecular weight of 500,000-600,000 and an ultraviolet light area of ​​250 -420nm free radical photoinitiator and isocyanate, the thickness of the outer adhesive layer is 18um; the mass ratio of the acrylic pressure sensitive adhesive, isocyanate and free radical photoinitiator is 100:1.5:20; the release backing paper uses 80 grams of glassine backing paper with release function for coating.

[0025] The outer adhesive layer also includes a triarylsulfonium salt photoinitiator I-160, and the mass ratio of the triarylsulfonium salt photoinitiator I-160 to the free radical photoinitiator is 1:5. The free radical photoinitiator is a hydrogen abstraction type photoinitiator BP. The outer adhesive layer also includes nano-lanthanu...

Embodiment 3

[0028] A new type of self-adhesive for reducing viscosity by UV light, which is characterized in that it includes a release backing paper and an outer adhesive layer, wherein the outer adhesive layer includes an acrylic pressure-sensitive adhesive with a molecular weight of 500,000-600,000 and an ultraviolet light area of ​​250 -420nm free radical photoinitiator and isocyanate, the thickness of the outer adhesive layer is 25um; the mass ratio of the acrylic pressure-sensitive adhesive, isocyanate and free radical photoinitiator is 100:3:12; the release backing paper uses a 80 grams of glassine backing paper with release function for coating.

[0029] The outer adhesive layer also includes a triarylsulfonium salt photoinitiator I-160, and the mass ratio of the triarylsulfonium salt photoinitiator I-160 to the free radical photoinitiator is 1.5:5. The free radical photoinitiator is a hydrogen abstraction type photoinitiator BP. The outer adhesive layer also includes nano-lantha...

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Abstract

The invention relates to a novel adhesive sticker which comprises release body paper and an outer adhesive layer, wherein the outer side adhesive layer comprises an acrylic sensitive adhesive having amolecular weight of 500-600 thousand, a free radical photoinitiator with an ultraviolet region in a range of 250-420 nm, and isocyanate. The outer side adhesive layer is 18-25 [mu]m thick; the mass ratio of the acrylic sensitive adhesive to isocyanate to the free radical photoinitiator is 100: (1.5-3): (12-20); and the release body paper is coated by 80 g glassine body paper with a releasing function. The adhesive sticker prepared by the method has a relatively high initial viscous force, the viscous force can be quickly reduced after UV illumination to achieve a natural falling extent, and the adhesive sticker is not left on a wafer body.

Description

technical field [0001] The invention belongs to the technical field of glue, and in particular relates to a novel self-adhesive that reduces viscosity by UV light and a preparation method thereof. Background technique [0002] Electronic wafer dicing requires a certain amount of sticky adhesive to fix the wafer, and when the electronic wafer dicing is sent to the next working position for processing, the wafer must be completely separated. After the common self-adhesive is fixed, it is difficult to fall off for a long time, and at the same time, it is easy to leave residual glue on the wafer body. [0003] In order to avoid the electronic crystal garden from falling off during electronic wafer cutting, and to make the electronic wafer garden easy to fall off in the next process, it solves the problems of high defect rate and easy downtime during electronic product processing and electronic wafer cutting operations. Phenomenon. Therefore, in the wafer dicing process, a new ...

Claims

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Application Information

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IPC IPC(8): C09J7/38C09J7/40C09J133/04C09J11/04
CPCC08K2003/221C08K2201/011C09J11/04C09J133/04C09J7/38C09J7/40
Inventor 黄伟
Owner 深圳深汕特别合作区昌茂粘胶新材料有限公司
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