Cooling jacket

• US 20060219387A1
• Filed: 03/31/2006
• Published: 10/05/2006
• Est. Priority Date: 04/01/2005
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Nakanishi, Masato, Atarashi, Takayuki
• Granted Patent: US 7,721,788 B2
• Time in Patent Office: Days
• US Class Current: 165/80.400
• CPC Class Codes: H01L 23/3672 Foil-like cooling fins or heat sinks being part of lead-frames H01L23/49568
• CPC Class Codes: H01L 23/473 by flowing liquids H01L23/4332, H01L23/4338 take precedence
• 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 cooling jacket for cooling a heat-generating element 300 through transmitting heat-generation therein into a coolant flowing within an inside thereof, which is mounted within an electronic apparatus, comprises a base portion 110, having a heat-transfer surface 111 to be contact on a surface of the heat-generating element, and a plural number of wall portions 113, each being defined to extend into a direction perpendicular to the heat-transfer surface, thereby defining flow passages 114 for the liquid coolant between the wall portions; and a cover portion 120, being attached on the base portion surrounding a periphery thereof, thereby defining a passage for guiding the liquid coolant into the base portion, wherein the base portion builds up the sector-like shaped flow passages and a summit portion at a central portion of the base, and has a configuration being thermally isotropic to the heat-generating element to be contact thereon.

Claims

1. A cooling jacket for cooling a heat-generating element through transmitting heat-generation therein into a coolant flowing within an inside thereof, which is mounted within an electronic apparatus, comprising:

a base portion being built up with flow passages therein; and

a cover portion, wherein said base portion being comprises a heat-transfer surface to be contact on a surface of said heat-generating element, a projecting portion extending into a direction perpendicular to said heat-transfer surface, and a plural number of wall portions, each being formed to extend into a direction perpendicular to said heat-transfer surface and to said projecting portion, thereby defining flow passages for the liquid coolant between said plural number of wall portions, and

said cover potion is attached on said base portion surrounding a periphery thereof, and thereby defining a flow passage for guiding the liquid coolant into said base portion.

2. The cooling jacket, as is described in the claim 1, wherein said projecting portion of said base portion is shaped so that width thereof is narrowed as it separates from a center of said heat-transfer surface.

3. The cooling jacket, as is described in the claim 1, wherein the flow passage for the liquid coolant, which is defined between the wall portions of said base portion is sector-like in configuration thereof.

4. The cooling jacket, as is described in the claim 3, wherein said projecting portion of said base portion forms a summit portion with respect to a central portion of said heat-transfer surface, and thereby defining the sector-like flow passages for the liquid coolant on both sides of said summit portion.

5. A cooling jacket for cooling a heat-generating element through transmitting heat-generation therein into a coolant flowing within an inside thereof, which is mounted within an electronic apparatus, comprising:

a base portion having a heat-transfer surface to be contact on a surface of said heat-generating element, and a plural number of wall portions, each being defined to extend into a direction perpendicular to said heat-transfer surface, thereby defining flow passages for the liquid coolant between said plural number of wall portions; and

a cover portion, being attached on said base portion surrounding a periphery thereof, thereby defining a passage for guiding the liquid coolant into said base portion, wherein

said base portion has a configuration being thermally isotropic to said heat-generating element to be contact on said heat-transfer surface.