Heat dissipation structures and method of making

• US 20040070945A1
• Filed: 06/03/2003
• Published: 04/15/2004
• Est. Priority Date: 06/05/2002
• Status: Abandoned Application

• Current Assignee: Wayne Rowland
• Original Assignee: Wayne Rowland
• Inventors: Rowland, Wayne
• Application Number:
  US10/454,755
• Publication Number:
  US 20040070945A1
• Time in Patent Office: Days
• US Class Current: 361/705
• CPC Class Codes: H01L 21/4871 Bases, plates or heatsinks
• CPC Class Codes: H01L 23/3733 having a heterogeneous or anisotropic structure, e.g. powder or fibres in a matrix, wire mesh, porous structures H01L23/3732, H01L23/3737 take precedence
• CPC Class Codes: H01L 23/3737 Organic materials with or without a thermoconductive filler
• 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

Abstract

A method and related structure for dissipating heat, particularly in electronic components. The method includes mixing magnetite particles and epoxy into a paste-like state, subjecting the mixture to opposing polarities of a magnetic field on opposing sides of the mixture until the epoxy hardens to urge the magnetite particles into alignment and to form elongate structures to conduct heat away from a heat source, such as an electronic component on which the epoxy is applied.

Claims

1. A method of providing a heat dissipating structure, comprising:

forming a mixture of magnetite particles and epoxy; and

subjecting the mixture to a magnetic field to cause the magnetite particles to connect and align into elongate heat conductive structures.

2. The method of claim 1 wherein subjecting the mixture to a magnetic field comprises passing an electric current through a coil to create the magnetic field.

3. The method of claim 1 wherein subjecting the mixture to a magnetic field comprises placing opposite poles of magnets on opposing sides of the mixture of magnetite particles and the epoxy.

4. A method of forming a heat dissipating coil, comprising:

forming a mixture of magnetite particles and epoxy;

applying the mixture to an electronic component;

subjecting the mixture of the magnetite particles and the epoxy to a magnetic field before the epoxy dries to form elongate heat conducting structures of the magnetite particles; and

maintaining the magnetic field until the epoxy hardens.

5. The method of claim 4 wherein applying the magnetic field comprises passing an electric current through a coil to induce the magnetic field.

6. The method of claim 4, wherein applying the magnetic field comprises placing opposite magnetic poles at opposing sides of the electronic structure.

7. An electronic device, comprising:

an electronic component; and

an epoxy compound form of an epoxy and magnetite particles applied to the electronic component, the magnetite particles formed into heat conducting structures in the epoxy to conduct heat generated by the electronic component.

8. The device of claim 7 wherein the electronic component comprises a coil, and the epoxy compound is applied to the coil.

9. The device of claim 7 wherein the electronic component comprises an integrated circuit and the epoxy compound is applied to the integrated circuit.

10. The device of claim 7 wherein the electronic component comprises a semiconductor chip and the epoxy compound is applied to the semiconductor chip.