Method of Manufacturing Heat Conductive Sheet, Heat Conductive Sheet, and Heat Dissipation Member

Patent metadata

Field	Value
Publication number	US-2016150680-A1
Application number	US-201414898858-A
Country	US
Kind code	A1
Filing date	Jun 27, 2014
Priority date	Jul 1, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

Provided is a method of manufacturing a heat conductive sheet with improved adhesion and heat conductivity. The method includes the steps of molding a heat conductive resin composition, which includes heat conductive fillers and a binder resin, into a predetermined shape and curing the heat conductive resin composition to obtain a molded product of the heat conductive resin composition, cutting the molded product into sheets to obtain a molded product sheet, and pressing the molded product sheet.

First claim

1 . A method of manufacturing a heat conductive sheet, comprising the steps of:
molding a heat conductive resin composition, which includes heat conductive fillers and a binder resin, into a predetermined shape and curing the heat conductive resin composition to obtain a molded product of the heat conductive resin composition; cutting the molded product into sheets to obtain at least one molded product sheet; and coating a surface of the molded product sheet with an uncured component of the binder resin oozing from a main body of the molded product sheet by pressing a slice surface of the molded product sheet.

2 . The method of manufacturing a heat conductive sheet according to claim 1 , wherein
the binder resin includes liquid silicone gel as a main ingredient and a curing agent, and a compounding ratio of the curing agent to the main ingredient is as follows: Main ingredient:curing agent=35:65 to 65:35.

3 . The method of manufacturing a heat conductive sheet according to claim 1 , wherein
the heat conductive fillers comprise carbon fibers, and the heat conductive resin composition is extruded and filled into a hollow die, and the heat conductive resin composition is heat cured, to obtain the molded product in which the carbon fibers are orientated randomly with respect to a direction in which the heat conductive resin composition is extruded.

4 . The method of manufacturing a heat conductive sheet according to claim 1 , wherein
the molded product sheet is pressed via a spacer into a predetermined thickness.

5 . The method of manufacturing a heat conductive sheet according to claim 3 , wherein
the molded product sheet is pressed via a spacer into a predetermined thickness.

6 . The method of manufacturing a heat conductive sheet according to claim 1 , wherein
the at least one molded product sheet comprises a plurality of molded product sheets being disposed adjacent to each other, and the molded product sheets are pressed together to manufacture the heat conductive sheet in which the molded product sheets are integrated.

7 . The method of manufacturing a heat conductive sheet according to claim 3 , wherein
the at least one molded product sheet comprises a plurality of molded product sheets being disposed adjacent to each other, and the molded product sheets are pressed together to manufacture the heat conductive sheet in which the molded product sheets are integrated.

8 . The method of manufacturing a heat conductive sheet according to claim 4 , wherein
the at least one molded product sheet comprises a plurality of molded product sheets being disposed adjacent to each other, and the molded product sheets are pressed together to manufacture the heat conductive sheet in which the molded product sheets are integrated.

9 . The method of manufacturing a heat conductive sheet according to claim 5 , wherein
the at least one molded product sheet comprises a plurality of molded product sheets being disposed adjacent to each other, and the molded product sheets are pressed together to manufacture the heat conductive sheet in which the molded product sheets are integrated.

10 . A heat conductive sheet, comprising:
a sheet main body made of a cured heat conductive resin composition, which includes heat conductive fillers and a binder resin, wherein a surface of the sheet main body is coated with an uncured component of the binder resin oozing from the sheet main body.

11 . The heat conductive sheet according to claim 10 , wherein
the entire surface of the sheet main body is coated with the uncured component of the binder resin oozing from the sheet main body as a result of pressing.

12 . The heat conductive sheet according to claim 10 , wherein
the heat conductive fillers comprise carbon fibers, and the carbon fibers that are present on the surface of the sheet main body are coated with the uncured component of the binder resin oozing from the sheet main body.

13 . The heat conductive sheet according to claim 10 , wherein
the sheet main body is obtained by integrating a plurality of molded product sheets, each molded product sheet being made of the cured heat conductive resin composition, which includes the heat conductive fillers and the binder resin.

14 . The heat conductive sheet according to claim 12 , wherein
the sheet main body is obtained by integrating a plurality of molded product sheets, each molded product sheet being made of the cured heat conductive resin composition, which includes the heat conductive fillers and the binder resin.

15 . The heat conductive sheet that is manufactured by the method according to claim 1 .

16 . A heat dissipation member, comprising:
a heat spreader configured to dissipate heat generated by an electronic element; and a heat conductive sheet disposed on the heat spreader and sandwiched between the heat spreader and the electronic element, wherein the heat conductive sheet includes a sheet main body made of a cured heat conductive resin composition, which includes heat conductive fillers and a binder resin, and an entire surface of the sheet main body is coated with an uncured component of the binder resin oozing from the sheet main body.

17 . The method of manufacturing a heat conductive sheet according to claim 2 , wherein
the molded product sheet is pressed via a spacer into a predetermined thickness.

18 . The method of manufacturing a heat conductive sheet according to claim 2 , wherein
the at least one molded product sheet comprises a plurality of molded product sheets being disposed adjacent to each other, and the molded product sheets are pressed together to manufacture the heat conductive sheet in which the molded product sheets are integrated.

Assignees

• Dexerials Corp

Inventors

• Aramaki Keisuke
• Yoshinari Atsuya
• Ishii Takuhiro
• Uchida Shinichi
• Ito Masahiko

Classifications

• B32B2383/00

  Polysiloxanes · CPC title

• H05K7/2049

  Pressing means used to urge contact, e.g. springs · CPC title

• B32B38/0004

  Cutting, tearing or severing, e.g. bursting; Cutter details (cutting in general B26D; laminating combined with punching or perforating B32B38/04; removing all or part of the layers B32B38/10; cutting in combination with laying up and registration B32B38/185 takes precedence) · CPC title

• H05K7/20481 Primary

  characterised by the material composition exhibiting specific thermal properties · CPC title

• F28F13/18

  by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing · CPC title