Thermal head

Details Thermal head Thermal head

1998-04-16

1999-12-14

Tran, Huan

Incremental printing of symbolic information

Thermal marking apparatus or processes

Specific resistance recording element type

B41J 2335

Patent

active

060024186

ABSTRACT:
The improved thermal head comprises heating elements which were provided with heating histories to previously change their resistance values by predetermined values; and a carbon-based protective layer which was formed after the heating elements were provided with the heating histories. The invention provides the thermal head in which corrosion and wear of the protective film, and the resistance variation of the heating elements due to thermal recording were significantly reduced, and which has a sufficient durability and stability with the passage of time to perform thermal recording of high-quality images in a consistent manner over an extended period of operation.

REFERENCES:
patent: 5238705 (1993-08-01), Hayashi et al.

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