ADHESIVE SHEET AND ELECTRONIC DEVICE

• US 20130209800A1
• Filed: 08/18/2011
• Published: 08/15/2013
• Est. Priority Date: 09/07/2010
• Status: Abandoned Application

• Current Assignee: Lintec Corporation
• Original Assignee: Lintec Corporation
• Inventors: Uemura, Kazue, Amino, Yumiko, Suzuki, Yuta, Ono, Yoshitomo, Nakajima, Emi
• Application Number:
  US13/820,837
• Publication Number:
  US 20130209800A1
• Time in Patent Office: Days
• US Class Current: 428/354
• CPC Class Codes: C09D 183/16 in which all the silicon atoms are connected by linkages other than oxygen atoms
• CPC Class Codes: C09J 121/00 Adhesives based on unspecified rubbers
• CPC Class Codes: C09J 133/04 Homopolymers or copolymers of esters C09J143/04 takes precedence
• CPC Class Codes: C09J 183/16 in which all the silicon atoms are connected by linkages other than oxygen atoms
• CPC Class Codes: C09J 2203/326 for bonding electronic components such as wafers, chips or semiconductors
• CPC Class Codes: C09J 2421/00 Presence of unspecified rubber
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 2483/006 in the substrate
• CPC Class Codes: C09J 7/29 Laminated material metallised plastics C09J7/22
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: Y10T 428/2848 Three or more layers

Abstract

The invention pertains to an adhesive sheet including a base material having thereon at least a gas barrier layer and an adhesive layer, wherein the gas barrier layer is constituted of a material containing at least an oxygen atom and a silicon atom; in a surface layer part of the gas barrier layer, an existing proportion of an oxygen atom is from 60 to 75%, an existing proportion of a nitrogen atom is from 0 to 10%, and an existing proportion of a silicon atom is from 25 to 35% relative to a total existing amount of the oxygen atom, the nitrogen atom, and the silicon atom; and a film density in the surface layer part of the gas barrier layer is from 2.4 to 4.0 g/cm³, and also to an electronic device provided with the subject adhesive sheet as an electronic device member. The invention is able to provide an adhesive sheet with excellent gas barrier properties, resistance to folding and transparency and also an electronic device provided with the subject adhesive sheet as an electronic device member.

Claims

1. An adhesive sheet, comprising:

a base material comprising a gas barrier layer and an adhesive layer,

wherein the gas barrier layer comprises a material comprising an oxygen atom and a silicon atom;

a surface layer of the gas barrier layer comprises the oxygen atom in an amount of from 60 to 75%, a nitrogen atom in an amount of from 0 to 10%, and the silicon atom in an amount of from 25 to 35% relative to a total amount of the oxygen atom, the nitrogen atom, and the silicon atom; and

a film density in the surface layer is from 2.4 to 4.0 g/cm³.

2. The adhesive sheet according to claim 1, wherein the material comprises a polysilazane compound.

3. The adhesive sheet according to claim 2, wherein the polysilazane compound is a perhydropolysilazane.

4. The adhesive sheet according to claim 1, wherein the gas barrier layer is obtained by a process comprising implanting an ion.

5. The adhesive sheet according to claim 4, wherein the ion is obtained by a process ionizing at least one gas selected from the group consisting of hydrogen, nitrogen, oxygen, argon, helium, neon, xenon, and krypton.

6. The adhesive sheet according to claim 1, wherein a water vapor transmission rate of the adhesive layer at a thickness of 50 μ

m is not more than 25 g/m²/day under an atmosphere at 40°

C. and a relative humidity of 90%.

7. The adhesive sheet according to claim 1, wherein an adhesive material of the adhesive layer is a rubber based adhesive.

8. An electronic device, comprising the adhesive sheet according to claim 1.

9. The adhesive sheet according to claim 1, wherein an adhesive material of the adhesive layer is an acrylic adhesive.

10. The adhesive sheet according to claim 1, wherein the surface layer of the gas barrier layer comprises the oxygen in the amount of from 60 to 72%, the nitrogen atom in the amount of from 0.1 to 8.0%, and the silicon atom in the amount of from 27 to 35% relative to the total amount of the oxygen atom, the nitrogen atom, and the silicon atom.

11. The adhesive sheet according to claim 1, wherein the film density on the surface is from 2.5 to 4.0 g/cm³.

12. The adhesive sheet according to claim 1, wherein an adhesive material of the adhesive layer comprises a polyisobutylene based resin.

13. The adhesive sheet according to claim 1, wherein an adhesive material of the adhesive layer comprises both a polyisobutylene based resin and a polybutene resin.

14. The adhesive sheet according to claim 6, wherein the water vapor transmission rate of the adhesive layer at the thickness of 50 μ

m is not more than 8 g/m²/day under an atmosphere at 40°

C. and a relative humidity of 90%.