Semi-conductive electrical heating device with voids

Details Semi-conductive electrical heating device with voids Semi-conductive electrical heating device with voids

1987-12-29

1990-01-09

Reynolds, B. A.

Electric heating

Heating devices

With heating unit structure

338333, 219532, H05B 310

Patent

active

048929980

ABSTRACT:
Heating devices, in which a semi-conductor pattern is carried on an insulating surface and a pair of spaced apart electrodes are electrically connected to the semi-conductor pattern, are characterized in that the semi-conductor pattern in at least one heating area of the device defines a two-dimensional array of areas that are devoid of semi-conductor material ("voids") within a continuous "mesh" of semi-conductive material. Preferably, the voids are hexagons arranged with the sides of adjacent hexagons parallel to each other, the centers of adjacent hexagons are at the corners of equilateral triangles, and the overall direction of current flow in the device is not parallel to any of the sides of the triangles.

REFERENCES:
patent: 3266005 (1966-08-01), Balde et al.
patent: 3287161 (1966-11-01), Schwertz et al.
patent: 3664013 (1972-05-01), MacGuire
patent: 3704359 (1972-11-01), Laing
patent: 4485297 (1984-11-01), Grise et al.

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