Thermal printhead with a resistor layer and method for manufacturing same
AssigneeRohm Co., Ltd.
InventorsTadashi Yamamoto, Shinobu Obata, Kanjou Ishibashi
Life of this patent
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Abstract
A thermal printhead (A1) comprises an insulating substrate (1), a common electrode (31) which is formed on the insulating substrate (1) and includes a plurality of comb teeth (31a), a plurality of individual electrodes (41) formed on the insulating substrate (1), and a resistor layer (51) formed on the insulating substrate (1) and electrically connected to the comb teeth (31a) and the individual electrodes (41). The resistor layer (51) comprises a thin film, whereas the common electrode (31) and the individual electrodes (41) comprise a thick film.
Claims4
A thermal printhead comprising:
- an insulating substrate;
- a common electrode formed on the insulating substrate and including a plurality of comb teeth;
- a plurality of individual electrodes formed on the insulating substrate;
- and a resistor layer formed on the insulating substrate and electrically connected to the comb teeth and the individual electrodes;
- wherein the resistor layer comprises a thin film of TaSiO2, whereas the common electrode and the individual electrodes comprise a thick film;
- wherein the comb teeth and the individual electrodes have respective front ends facing and spaced from each other;
- and
- wherein the resistor layer is divided into a plurality of electrically-separated resistor portions correspondingly to the comb teeth and the individual electrodes, each of the resistor portions being positioned between the front end of one of the comb teeth and the front end of the corresponding one of the individual electrodes.
A thermal printhead comprising:
- an insulating substrate;
- a common electrode formed on the insulating substrate and including a plurality of comb teeth;
- a plurality of individual electrodes formed on the insulating substrate;
- and a resistor layer formed on the insulating substrate and electrically connected to the comb teeth and the individual electrodes;
- wherein the resistor layer comprises a thin film, whereas the common electrode and the individual electrodes comprise a thick film;
- wherein the comb teeth and the individual electrodes have respective front ends facing and spaced from each other;
- and
- wherein the resistor layer is divided into a plurality of electrically-separated resistor portions correspondingly to the comb teeth and the individual electrodes, each of the resistor portions being positioned between the front end of one of the comb teeth and the front end of the corresponding one of the individual electrodes.
Dependencies are inferred from the claim text.