Adhesive tape containing getter material

• US 10,323,163 B2
• Filed: 12/05/2013
• Issued: 06/18/2019
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Tesa SE (maxingvest GmbH & Co. KGaA)
• Original Assignee: Tesa SE (maxingvest GmbH & Co. KGaA)
• Inventors: Keite-Telgenbuscher, Klaus, Ellinger, Jan, Grunauer, Judith, Petersen, Anika
• Primary Examiner(s): Ducheneaux, Frank D
• Application Number:
  US14/653,143
• Publication Number:
  US 20150337174A1
• Time in Patent Office: 2,021 Days
• Field of Search: None
• CPC Class Codes: B32B 2264/10 Inorganic particles
• CPC Class Codes: B32B 2405/00 Adhesive articles, e.g. adhesive tapes
• CPC Class Codes: B32B 27/14 next to a particulate layer
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: C08K 3/08 Metals
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C09J 153/005 Modified block copolymers
• CPC Class Codes: C09J 153/025 modified
• CPC Class Codes: C09J 171/00 Adhesives based on polyethers obtained by reactions forming an ether link in the main chain based on polyacetals C09J159/00; based on epoxy resins C09J163/00; based on polythioether-ethers C09J181/02; based on polyethersulfones C09J181/06; Adhesives based on derivatives of such polymers
• CPC Class Codes: C09J 177/02 Polyamides derived from omega-amino carboxylic acids or from lactams thereof C09J177/10 takes precedence
• CPC Class Codes: C09J 177/06 Polyamides derived from polyamines and polycarboxylic acids C09J177/10 takes precedence
• CPC Class Codes: C09J 2203/326 for bonding electronic components such as wafers, chips or semiconductors
• CPC Class Codes: C09J 2301/124 the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
• CPC Class Codes: C09J 2301/18 characterized by perforations in the adhesive tape
• CPC Class Codes: C09J 2301/302 the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
• CPC Class Codes: C09J 2301/304 the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
• CPC Class Codes: C09J 2301/41 additives as essential feature of the carrier layer
• CPC Class Codes: C09J 2400/123 in the substrate
• CPC Class Codes: C09J 2400/243 in the substrate
• CPC Class Codes: C09J 2400/263 : in the substrate
• CPC Class Codes: C09J 2423/006 : in the substrate
• CPC Class Codes: C09J 2423/046 : in the substrate
• CPC Class Codes: C09J 2433/00 : Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 2453/00 : Presence of block copolymer
• CPC Class Codes: C09J 2463/00 : Presence of epoxy resin
• CPC Class Codes: C09J 2471/00 : Presence of polyether
• CPC Class Codes: C09J 7/22 : Plastics; Metallised plastics
• CPC Class Codes: C09J 7/29 : Laminated material metallised plastics C09J7/22
• CPC Class Codes: C09J 7/38 : Pressure-sensitive adhesives [PSA]
• CPC Class Codes: C09J 7/40 : characterised by release liners
• CPC Class Codes: H01L 23/26 : including materials for absorbing or reacting with moisture or other undesired substances , e.g. getters
• CPC Class Codes: H01L 23/3164 : the coating being a foil
• CPC Class Codes: H01L 2924/00 : Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 : Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H10K 50/841 : Self-supporting sealing arrangements
• CPC Class Codes: Y10T 428/24331 : including nonapertured component
• CPC Class Codes: Y10T 428/249983 : As outermost component
• CPC Class Codes: Y10T 428/2848 : Three or more layers

Abstract

The aim of the invention is to effectively protect a flat adhesive compound from permeates originating from the surroundings as well as from permeates trapped during lamination, winding, stacking or other processing steps. For this purpose, the adhesive tape comprises at least the following layers in the indicated order: a first outer adhesive compound layer A, a layer B, which contains at least one inorganic getter material, and a second outer adhesive compound layer C. The invention also relates to the use of said adhesive tape as an encapsulation material.

Claims

1. An adhesive tape comprising the layers A, B and C in the order stated, wherein:

layer A is a first outer layer of adhesive,

layer B is a continuous layer comprising at least 95 wt %, based on a total weight of the layer B, of at least one inorganic getter material, and

layer C is a second outer layer of adhesive

wherein the getter material in its application form has a minimum permeate uptake capacity for water and/or oxygen of 1% of its own weight, and

wherein the inorganic getter material is selected form the group consisting of calcium sulfate, calcium chloride, calcium oxide, fumed silicas, zeolites, and a mixture of two or more of the above substances.

2. The adhesive tape of claim 1, wherein at least one of the layers A and C consists of a pressure sensitive adhesive.

3. The adhesive tape of claim 2, wherein the getter material is present in particulate form in the layer B.

4. The adhesive tape of claim 1, wherein the getter material is present in particulate form in the layer B.

5. The adhesive tape of claim 1 which comprises, in addition to the layers A, B, and C, a carrier layer which does not comprise any getter material and is disposed between the layers A and C.

6. The adhesive tape of claim 1, wherein layer B comprises at least 99 wt %, based on a total weight of the layer B, of the at least one inorganic getter material.

7. The adhesive tape of claim 1,

wherein layer A and layer C both consist of pressure sensitive adhesives.

8. An adhesive tape comprising the layers A, B and C in the order stated, wherein:

layer A is a first outer layer of adhesive,

layer B is a continuous layer comprising at least 95 wt %, based on a total weight of the layer B, of at least one inorganic getter material, and

layer C is a second outer layer of adhesive

wherein layer A and layer C layers each consist of the same adhesive.

9. An adhesive tape comprising the layers A, B and C in the order stated, wherein:

layer A is a first outer layer of adhesive,

layer B is a continuous layer comprising at least 95 wt %, based on a total weight of the layer B, of at least one inorganic getter material, and

layer C is a second outer layer of adhesive, and

wherein the layer A and the layer C each have a water vapor permeation rate of less than 50 g/(m²*d), said water vapor permeation rates being measured based on an adhesive thickness of 50 μ

m, measured at 38°

C. and 90% relative humidity in accordance with the American Society for Testing and Materials (ASTM) F-12249 test.

10. An adhesive tape comprising the layers A, B and C in the order stated, wherein:

layer A is a first outer layer of adhesive,

layer B is a continuous layer comprising at least 95 wt %, based on a total weight of the layer B, of at least one inorganic getter material, and

layer C is a second outer layer of adhesive, and

wherein the adhesive tape further comprises, in addition to the layers A, B, and C, at least one carrier layer and at least one barrier layer against one or more permeates, the barrier layer and the carrier layer being in direct contact with one another and disposed between the layers A and C.