Enhanced multichip module cooling with thermally optimized pistons and closely coupled convective cooling channels

• US 5,170,319 A
• Filed: 10/18/1991
• Issued: 12/08/1992
• Est. Priority Date: 06/04/1990
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Simons, Robert E., Ellsworth, Michael J. Jr., Goth, Gary F., Zumbrunnen, Michael L., Chao-Fan Chu, Richard
• Primary Examiner(s): Tolin, Gerald P.
• Application Number:
  US07/780,688
• Time in Patent Office: 417 Days
• Field of Search: 165/80.3, 165/80.4, 165/104.33, 165/185, 165/109.1, 165/170, 174/16.3, 357/81, 357/82, 361/382, 361/383, 361/385-389
• US Class Current: 361/689
• CPC Class Codes: H01L 23/4338 Pistons, e.g. spring-loaded members
• 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 thermally optimized piston for use in a liquid cooled module. The thermally optimized piston has three distinctive sections, an upper tapered section, a central cylindrical section, and a lower diverging section. In a preferred embodiment, the thermally optimized piston is provided as part of an improved electronic module. The improved electronic module includes enhanced convective cooling channels disposed between the pistons.

Claims

1. An electric circuit cooling module, comprising:

a first section having a plurality of channels formed therein,

a first flow distributor connected to the first section and disposed at a first end of the channels, the first flow distributor comprising distribution means for receiving coolant from an inlet and for supplying the coolant to the first end of the channels; and

a second flow distributor connected to the first section and disposed at a second end of the channels, the second flow distributor comprising collection means for collecting the coolant from the channels and for expelling the coolant from the module,

wherein the distribution means is of a converging shape with respect to the first end of the channels starting at the first end of a first one of the channels closest to the inlet and proceeding toward the first end of a second one of the channels furthest from the inlet, and wherein the collection means is of a diverging shape with respect to the channels starting at a the second end of the first one of the channels and proceeding toward the second end of the second one of the channels.

2. The electronic circuit cooling module of claim 1 wherein the first section comprises a plurality of I-shaped bars, the I-shaped bars being welded to one another so as to form the channels therebetween.

3. The electronic circuit cooling module of claim 1, further comprising, a top plate connected to the first section and disposed to cover the channels.

4. The electronic circuit cooling module of claim 1 wherein the first section comprises a plurality of bars, each of the bars having at least one protrusion on each side thereof.

5. The electronic circuit cooling module of claim 1 wherein the channels comprise at least one surface having a metallic alloy plating.

6. The electronic circuit cooling module of claim 1 wherein the channels comprise interweaved fins and wherein the channels have a width of less than 0.3 millimeters.

7. The electronic circuit cooling module of claim 1 wherein the channels comprise first and second pluralities of channels, the second plurality of channels is of a lesser number than the first plurality of channels.

8. The electronic circuit cooling module of claim 1 wherein the channels comprise flow turbulators disposed therein.

9. The electronic circuit cooling module of claim 8 wherein the flow turbulators are disposed alternately with one another on opposing walls of the channels.

10. The electronic circuit cooling module of claim 1, wherein the first section has a plurality of blind holes formed therein, the holes being disposed between the channels, and further comprising plurality of pistons disposed at least partially in the holes.

11. The electronic circuit cooling module of claim 10 wherein each of the pistons comprises a crown having a chip contacting surface, the chip contacting surface having a radius of curvature approximating that of a surface of an integrated circuit chip with which the chip contacting surface is to make contact.

12. The electronic circuit cooling module of claim 11 wherein the piston is of a barrel shape and comprises an upper tapered portion, a central cylindrical portion, and a lower tapered portion.

13. The electronic circuit cooling module of claim 12 wherein the upper portion is of greater length than the central portion.

14. An electronic circuit cooling module, comprising:

a first section having a plurality of serpentine channels formed therein,

a first flow distributor connected to the first section and disposed at a first end of the channels, the first flow distributor comprising distribution means for receiving coolant from an inlet and for supplying the coolant to the first end of each of the channels; and

,

a second flow distributor connected to the first section and disposed at a second end of the channels, the second flow distributor comprising collection means for collecting the coolant from each of the channels and for expelling the coolant from the module,

wherein the distribution means converges with respect to the first end of the channels as a function of distance from the inlet and wherein the collection means converges with respect to the second end of the channels as a function of distance from the outlet.