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IEICE TRANSACTIONS on Electronics

Cooling Characteristics of Small Planar Packaging System Combined with Card-On-Board Packaging for High-Speed Telecommunication Systems

Tohru KISHIMOTO, Yasuo KANEKO

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Summary :

The small planar packaging (SPP) system described here can be combined with card-on-board (COB) packaging in high-speed asynchronous transfer mode (ATM) switching systems with throughput of over 40-Gb/s. The SPP system provides high I/O pin count density, high packaging density and high cooling capability. Prototype SPP system with air flow control structure for switching MCMs is constructed. Each MCM contained a 35 array of low thermal resistance butt-lead pin-grid-array on a glass ceramic substrate measuring 100170 mm with a plate fin heat-sink. This allows a power dissipation of more than 125 W per MCM, and 300 W per printed circuit board (PCB). Obtained board level heat flux density of the SPP system is 0. 37 W/cm2, which is six times that of conventional COB packaging. The SPP system combined with the COB packaging provides a small system foot-print and compact hardware for high-speed, large capacity ATM switching systems. This high-performance air cooling technology will be especially useful for future broadband ISDN high-speed switching systems.

Publication
IEICE TRANSACTIONS on Electronics Vol.E81-C No.10 pp.1639-1647
Publication Date
1998/10/25
Publicized
Online ISSN
DOI
Type of Manuscript
Category
Components

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