NDLI: Application of air cooled microchannel heat exchangers to card cage systems

Content Provider	IEEE Xplore Digital Library
Author	Nelson, R. Dolbear, T. Chen, K. Chao, C.
Copyright Year	1993
Description	Author affiliation: Microelectronics & Computer Technology Corp., Austin, TX, USA (Nelson, R.; Dolbear, T.)
Abstract	An application of a novel-geometry, air-cooled, microchannel heat exchanger for electronic chips reported by C. Hilbert et al. (1990) is described. These heat exchangers, based on narrow channels and laminar flow, are scaled to cool large packets, mated to high-power pin grid arrays (PGAs) or multichip modules (MCMs), and mounted on printed circuit boards in a card cage. The heat exchanger reported fits within the package footprint and meets chip temperature specifications to 50 W. The system provides cooling for two MCM or PGA boards, each carrying eight 35-W modules using the scaled design. The modules were mounted on a printed wiring board, along with conventional components dissipating an additional 100 W. Chip temperature rises within the packages were kept to 50 degrees C above ambient. The entire card cage contained the two MCM or PGA boards and several other conventionally cooled boards. Fan placement and air flow design were conventional except for the provision of ducting above the high-power packages. The heat exchangers operate at a very low pressure loss, allowing the MCM section to be cooled with two common axial flow fans while generating acoustic noise within the range acceptable for office equipment.
Starting Page	50
Ending Page	62
File Size	1322222
Page Count	13
File Format	PDF
ISBN	0780308638
DOI	10.1109/STHERM.1993.225331
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-02-02
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microchannel Electronics packaging Temperature Multichip modules Printed circuits Chip scale packaging Cooling Wiring Packaging machines Fans
Content Type	Text
Resource Type	Article

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