Thermal head and method of manufacturing the same, and heat-sensitive recording method
AssigneeFuji Photo Film Co., Ltd.
InventorOsamu Shimizu
Life of this patent
Estimating the term…
Abstract
A thermal head, used for an image forming device, comprises a glaze formed at at least a portion of a base plate of the thermal head so that at least a portion of the glaze is protruded, and a plurality of heater portions provided at the glaze, a length of each of the heater portions in a image forming direction of a recording material being less than or equal to 100 .mu.m, wherein an outer surface of each of the heater portions is a convex curved surface and is the outermost portion of the glaze.
Claims22
A thermal head used for an image forming device, comprising:
- a glaze formed at at least a portion of a base plate of the thermal head so that at least a portion of said glaze is protruded;
- and
- a plurality of heater portions provided at said glaze, a length of each of said heater portions in a image forming direction of a recording material being less than or equal to 100 .mu.m,
- wherein an outer surface of each of said heater portions is a convex curved surface and is the outermost portion of said glaze.
A method of manufacturing a thermal head for an image forming device, in which a glaze is formed at at least a portion of a base plate of the thermal head, in which a plurality of heater portions are provided at said glaze, a length of each of said heater portions in an image forming direction of a recording material being less than or equal to 100 .mu.m, wherein an outer surface of each of said heater portions being a convex curved surface and the outermost portion of said glaze, comprising the step of:
- lapping the outer surface of said glaze a plurality of times and under different conditions.
A heat-sensitive recording method, comprising the step of:
- recording, onto a heat-sensitive recording material which has an ink layer having a film thickness of 1.0 .mu.m or less, by a thermal head having a base plate on which a glaze is formed, said glaze having a heater portion with a convex curved surface having a curvature of 0.04 mm.sup.-1 or more that forms an outermost portion of said glaze.
A thermal head comprising:
- a base plate;
- and
- a glaze formed on said base plate, said glaze having a heater portion;
- wherein said heater portion has a convex curved surface that forms an outermost portion of said glaze;
- and
- wherein said convex curved surface has a curvature of 0.04 mm.sup.-1 or more.
Dependencies are inferred from the claim text.