GRAPHITE COMPLEX AND MANUFACTURING METHOD THEREOF

• US 20110045300A1
• Filed: 03/17/2009
• Published: 02/24/2011
• Est. Priority Date: 06/02/2008
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Tamaoki, Mitsuru, Funaba, Masashi, Kawamura, Norihiro, Kubo, Kazuhiko
• Granted Patent: US 8,673,446 B2
• Time in Patent Office: Days
• US Class Current: 428/408
• CPC Class Codes: C01B 32/205 Preparation
• CPC Class Codes: C01B 32/21 After-treatment
• CPC Class Codes: H01L 23/373 Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
• CPC Class Codes: H01L 23/3735 Laminates or multilayers, e.g. direct bond copper ceramic substrates
• 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: Y10T 156/10 Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

A graphite complex has a pyrolytic graphite sheet and a graphite layer. The pyrolytic graphite sheet is made by firing a polymer film. The graphite layer contains graphite powder as the main ingredient and is directly joined to the pyrolytic graphite sheet.

Claims

1. A graphite complex comprising:

a pyrolytic graphite sheet made by firing a polymer film; and

a graphite layer containing graphite powder as a main ingredient and directly joined to the pyrolytic graphite sheet.

2. The graphite complex according to claim 1, wherein a recess is formed in a joining surface of the pyrolytic graphite sheet to the graphite layer, and the graphite powder is packed into the recess.

3. The graphite complex according to claim 2, wherein the recess in the pyrolytic graphite sheet is formed by roll-pressing the pyrolytic graphite sheet after firing the polymer film.

4. A manufacturing method of a graphite complex, comprising the steps of:

overlaying a pyrolytic graphite sheet and a molded graphite sheet with each other so as to make contact with each other, the pyrolytic graphite sheet being made by firing a polymer film, the molded graphite sheet being formed of graphite powder as a main ingredient; and

joining the pyrolytic graphite sheet and the molded graphite sheet by pressing the pyrolytic graphite sheet and the molded graphite sheet overlaid with each other.

5. The manufacturing method of the graphite complex according to claim 4, wherein a pressure when pressing ranges from 30 MPa to 150 MPa inclusive.

6. The manufacturing method of the graphite complex according to claim 4, further comprising:

roll-pressing the pyrolytic graphite sheet before overlaying the pyrolytic graphite sheet and the molded graphite sheet with each other.

7. The manufacturing method of the graphite complex according to claim 6, wherein a compressibility ratio of the pyrolytic graphite sheet by roll-pressing ranges from 20% to 80% inclusive.