Thermal print head and process for producing

Details Thermal print head and process for producing Thermal print head and process for producing

1985-12-04

1987-01-06

Evans, Arthur G.

Recorders

Thermal recording

400120, 219543, 338308, G01D 1510

Patent

active

046350756

ABSTRACT:
An improved thermal printhead is disclosed which includes a plurality of addressable electrodes, each corresponding to a spot to be printed. In alternative embodiments, a single common electrode or a plurality of common electrodes are located in a plane below that of the addressable electrodes and are separated therefrom by an insulating layer. A portion of the common electrode is left exposed in the vicinity of each of the addressable electrodes and a covering of thermal resistive material electrically interconnects the two types of electrodes. Passage of a current through an addressable electrodes result in a current flow to the nearest points on a common electrode causing local heating in the resistive material. The electrode arrangement permits printing closer to the edge of the printhead and further, enables smaller, more clearly spaced printed "dots".

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