Heat spreader for plasma display panel

• US 8,211,260 B2
• Filed: 10/05/2006
• Issued: 07/03/2012
• Est. Priority Date: 10/14/2003
• Status: Active Grant

• Current Assignee: NeoGraf Solutions, LLC
• Original Assignee: Graftech International Holdings Inc (Graftech International Limited)
• Inventors: Norley, Julian, Smalc, Martin David, Capp, Joseph Paul, Clovesko, Timothy
• Primary Examiner(s): Lee, Katarzyna Wyrozebski
• Assistant Examiner(s): LEE, DANIEL H.
• Application Number:
  US11/543,714
• Publication Number:
  US 20080085389A1
• Time in Patent Office: 2,098 Days
• Field of Search: 156/249, 428/40.1
• US Class Current: 156/249
• CPC Class Codes: B32B 9/007 comprising carbon, e.g. graphite, composite carbon
• CPC Class Codes: C09J 133/04 Homopolymers or copolymers of esters C09J143/04 takes precedence
• CPC Class Codes: C09J 2203/318 for the production of liquid crystal displays
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 7/385 Acrylic polymers
• CPC Class Codes: C09J 7/40 characterised by release liners
• CPC Class Codes: H01J 11/10 AC-PDPs with at least one main electrode being out of contact with the plasma
• CPC Class Codes: H01J 2211/66 Cooling arrangements cooling or supporting means not being part of the tube H05K
• CPC Class Codes: H01J 9/241 the vessel being for a flat panel display H01J9/261 takes precedence; flat discharge lamps H01J9/248
• CPC Class Codes: H05K 7/20963 Heat transfer by conduction from internal heat source to heat radiating structure H05K7/20972 takes precedence
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/1476 Release layer
• CPC Class Codes: Y10T 428/149 Sectional layer removable

Abstract

The invention presented is a method for applying heat spreaders to a plurality of plasma display panels, including (a) providing a plurality of heat spreader composites, each of which comprises a heat spreader material having an adhesive thereon and a release material positioned such that the adhesive is sandwiched between the heat spreader material and the release material; (b) removing the release material from a plurality of the composites; and (c) applying at least one of the composites to each of the plurality of plasma display panels each such that the adhesive adheres the heat spreader material to the plasma display panel.

Claims

1. A method for applying heat spreaders to a plurality of plasma display panels, comprising (a) providing a plurality of heat spreader composites, each of which comprises a heat spreader material comprising at least one sheet of compressed particles of exfoliated graphite having an adhesive thereon and a release material positioned such that the adhesive is sandwiched between the heat spreader material and the release material, wherein the adhesive and release material provide an average release load of no greater than about 40 grams per centimeter at a release speed of one meter per second;

(b) removing the release material from a plurality of the composites; and

(c) applying at least one of the composites to each of the plurality of plasma display panels each such that the adhesive adheres the heat spreader material to the plasma display panel.

2. The method of claim 1 wherein the release material and adhesive are selected to permit a predetermined rate of release of the release material without causing undesirable damage to the heat spreader material.

3. The method of claim 1 wherein the average release load is no greater than about 10 grams per centimeter at a release speed of one meter per second.

4. The method of claim 1 wherein the adhesive achieves a minimum lap shear adhesion strength of at least about 125 grams per square centimeter.

5. The method or claim 4 wherein the adhesive achieves an average lap shear adhesion strength of at least about 700 grams per square centimeter.

6. The method of claim 4 wherein the adhesive results in an increase in through thickness thermal resistance of the adhesive/heat spreader material of not more than about 35% as compared to the heat spreader material itself.

7. The method of claim 6 wherein the thickness of the adhesive is no greater than about 0.5 mils.

8. The method of claim 7 wherein the thickness of the adhesive is no greater than about 0.25 mils.

9. The method of claim 1 wherein the heat spreader material comprises a laminate comprising a plurality of sheets of compressed particles of exfoliated graphite.

10. A method for applying a heat spreader to a heat source, comprising (a) providing a heat spreader composite, which comprises a heat spreader material comprising at least one sheet of compressed particles of exfoliated graphite having an adhesive thereon and a release material positioned such that the adhesive is sandwiched between the heat spreader material and the release material, wherein the adhesive and release material provide an average release load of no greater than about 40 grams per centimeter at a release speed of one meter per second;

(b) removing the release material from the composite; and

(c) applying the composite to a heat source such that the adhesive adheres the heat spreader material to the heat source, wherein the release material and adhesive are selected to permit a predetermined rate of release of the release material without causing undesirable damage to the heat spreader material.

11. The method of claim 10 wherein the average release load is no greater than about 10 grams per centimeter at a release speed of one meter per second.

12. The method of claim 10 wherein the adhesive achieves a minimum lap shear adhesion strength of at least about 125 grams per square centimeter.

13. The method or claim 12 wherein the adhesive achieves an average lap shear adhesion strength of at least about 700 grams per square centimeter.

14. The method of claim 12 wherein the adhesive results in an increase in through thickness thermal resistance of the adhesive/heat spreader material of not more than about 35% as compared to the heat spreader material itself.

15. The method of claim 14 wherein the thickness of the adhesive is no greater than about 0.5 mils.

16. The method of claim 15 wherein the thickness of the adhesive is not greater than about 0.25 mils.

17. The method of claim 10 wherein the heat spreader material comprises a laminate comprising a plurality of sheets of compressed particles of exfoliated graphite.