Liquid-cooling cold plate and method for manufacturing same

• US 10,532,401 B2
• Filed: 02/22/2016
• Issued: 01/14/2020
• Est. Priority Date: 04/13/2015
• Status: Active Grant

• Current Assignee: Hitachi Kokusai Electric Incorporated (Hitachi, Ltd.)
• Original Assignee: Hitachi Kokusai Electric Incorporated (Hitachi, Ltd.)
• Inventors: Ujiie, Satoru, Daikoku, Takahiro
• Primary Examiner(s): Jonaitis, Justin M
• Application Number:
  US15/556,307
• Publication Number:
  US 20180078997A1
• Time in Patent Office: 1,422 Days
• Field of Search: 165 804, 165168, 165170, 165171, 2989003, 29890032, 2989004, 29890043, 29890045
• CPC Class Codes: B22D 19/0072 for making objects with integrated channels
• CPC Class Codes: F28D 1/0383 with U-flow or serpentine-flow inside the conduits
• CPC Class Codes: F28D 1/0475 the conduits having a single U-bend
• CPC Class Codes: F28D 1/0476 the conduits having a non-circular cross-section
• CPC Class Codes: F28D 2021/0029 Heat sinks
• CPC Class Codes: F28F 1/006 with variable shape, e.g. with modified tube ends, with different geometrical features F28F1/025, F28F1/06, F28F1/08, F28F9/16, F28F9/18 take precedence
• CPC Class Codes: F28F 1/16 the means being integral with the element, e.g. formed by extrusion F28F1/22 takes precedence
• CPC Class Codes: F28F 13/08 by varying the cross-section of the flow channels
• CPC Class Codes: F28F 2240/00 Spacing means
• CPC Class Codes: F28F 2255/146 overmolded
• CPC Class Codes: F28F 3/12 Elements constructed in the shape of a hollow panel, e.g. with channels F28D1/02, F28D1/03 take precedence
• CPC Class Codes: F28F 9/0131 formed by plates F28F9/0138 takes precedence
• CPC Class Codes: F28F 9/0258 of quick acting type, e.g. with snap action
• CPC Class Codes: H01L 21/4871 Bases, plates or heatsinks
• CPC Class Codes: H01L 23/473 by flowing liquids H01L23/4332, H01L23/4338 take precedence
• CPC Class Codes: H05K 7/20254 Cold plates transferring heat from heat source to coolant

Abstract

In a method of manufacturing a liquid-cooling cold plate, cast molding is performed after embedding a metal pipe for supplying a cooling liquid inside a casting mold. Fixing brackets to be attached to the metal pipe is provided to maintain a positional relationship between a plurality of portions of the metal pipe embedded in the casting mold. The casting molding is performed by pouring molten metal into the casting mold while the fixing metal parts are attached to the metal pipe.

Claims

1. A method of manufacturing a liquid-cooling cold plate, in which cast molding is performed after embedding a curved metal pipe for supplying a cooling liquid in a casting mold, and a heat-generating component is disposed on the cast molded metal pipe, the method comprising:

providing a plurality of pipe pressing portions in conformation with the shape of the curved metal pipe in positions which avoid portions directly below the heat-generating component for pressing and fixing the metal pipe at the casting mold, and

performing casting molding by pouring molten metal into the casting mold while sandwiching, pressing and fixing the metal pipe by the pipe pressing portions.

2. A liquid-cooling cold plate, in which cast molding is performed after embedding a curved metal pipe, and a heat-generating component is mounted directly above the cast molded metal pipe, comprising:

a pair of recesses configured to be provided in a plurality of positions which avoid portions directly below the heat-generating component,

wherein the metal pipe is pressed, fixed and sandwiched by the pair of recesses when the metal pipe is embedded in the liquid-cooling cold plate.