Electronic device having a cooling element

Details Electronic device having a cooling element Electronic device having a cooling element

1990-04-26

1991-04-16

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310800, 310330, 310324, 416 83, 417322, 417436, H01L 4108

Patent

active

050085824

ABSTRACT:
In an electric device having a package included an electric circuit element therein, a cooling fan is fixed on the package directly. The fan is formed of piezoelectric elements and a flexible cooling fin. The fan generates the cooling air flow due to vibration of the piezoelectric elements.

REFERENCES:
patent: 4498851 (1985-02-01), Kolm et al.
patent: 4595338 (1986-06-01), Kolm et al.
Piezo Ceramic Devices, by Daniel Ruby, Popular Science, Jul. 1982, pp. 69-71.
Ferroelectrics, vol. 22, pp. 919-923, "High Field Dielectric Loss of PVF.sub.2 and The Electromechanical Conversion Effiency of a PVF.sub.2 Fan"; M. Toda, 1979.
Proceedings of the 5th meeting on FMA-5, Kyoto, Japan, J. Application Phys. 24 Suppl., pp. 203-205, "A Piezoelectric Fan Using PZT Ceramics"; M. Yorinaga et al.; 1985.
Ferroelectrics, vol. 22, pp. 911-918, "Theory of Air Flow Generation by a Resonant Type PVF.sub.2 Bimorph Cantilever Vibrator"; M. Toda; 1979.

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