EP 0092005 A1 19831026 - A thermal head.
Title (en)
A thermal head.
Title (de)
Thermischer Druckkopf.
Title (fr)
Tête d'imprimeur thermique.
Publication
Application
Priority
EP 82302017 A 19820420
Abstract (en)
A thermal head for high speed printing at high temperature comprises a dielectric substrate (10, 15), a first thin SiO2 layer (20) formed on the substrate, a heater layer (30) on the first SiO2 layer, conductive layers (40) for coupling the heater layers to an external circuit, a second thin SiO2 layer (50) on the heater layer, and a protection layer (60) over the second SiO2 layer. The width of the heater layer is less than 30 mu m. The preferable thickness of the SiO2 layers is less than 2 mu m. Preferably, the heater layer is made of tantalum nitride. The presence of the first SiO2 layer (20) and the narrow width of the heater layer (30) allow the heater to operate at a higher input power, and hence at a higher temperature.
IPC 1-7
IPC 8 full level
B41J 2/335 (2006.01); B41J 2/345 (2006.01)
CPC (source: EP)
B41J 2/3351 (2013.01); B41J 2/33515 (2013.01); B41J 2/33525 (2013.01); B41J 2/3353 (2013.01); B41J 2/33535 (2013.01); B41J 2/33545 (2013.01); B41J 2/3355 (2013.01); B41J 2/3357 (2013.01); B41J 2/345 (2013.01)
Citation (search report)
- [AD] GB 1524347 A 19780913 - OKI ELECTRIC IND CO LTD
- [A] GB 2022019 A 19791212 - IBM
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0092005 A1 19831026; EP 0092005 B1 19850327; DE 3262754 D1 19850502
DOCDB simple family (application)
EP 82302017 A 19820420; DE 3262754 T 19820420