Thin film thermal-sensitive printing head and manufacturing method thereof

Abstract

The invention discloses a thin film thermal-sensitive printing head. The thin film thermal-sensitive printing head comprises a base plate, a thermal storage layer, a resistive layer, a conducting layer, a protective layer, an anti-oxidation layer, drive ICs and a protecting layer; the thermal storage layer comprises an uplift part and a base body part which are arranged on the base plate; the outer sides of the base plate and the thermal storage layer are covered with the resistive layer, and the resistive layer is provided with a plurality of heat-emitting parts; the conducting layer is arranged on the outer side of the resistive layer and comprises a plurality of electrodes capable of forming alloys with soldering tin, the conducting layer is etched at the top of the uplift part, and theheat-emitting part of the resistive layer is exposed; the protective layer is arranged on the outer side of the heat-emitting part; the conducting layer on a second part of the base plate is coveredwith the anti-oxidation layer; and the drive ICs are laid in the length direction of the base plate and connected with the conducting layer on the second part of the base plate in a face-down welded mode. The invention further discloses a manufacturing method of the thin film thermal-sensitive printing head. Aluminum circuits in an existing thermal-sensitive printing head are replaced by the electrodes made of metal and capable of forming the alloys with the soldering tin, the drive ICs adopt face-down welding to replace existing gold wire welding, the cost is low, and the welding speed is high.

Description

technical field [0001] The invention relates to the technical field of thermal printing devices, in particular to a film thermal printing head and a manufacturing method thereof. Background technique [0002] The thermal print head is the main component of the thermal printer. The thermal printer selectively heats the thermal paper at a certain position, and the resulting graphics are generated. Heating is provided by a small electronic heater on the printhead that is in contact with the thermally sensitive material. The form of the heater scheduling square point or bar is logically controlled by the printer, and when driven, a graphic corresponding to the heating element will be produced on the thermal paper. The same logic that controls the heating elements also controls the paper feed, thus enabling graphics to be printed across the entire label or paper. [0003] "Thin film" is a production process of thermal print head. The thin film process is mainly used on the cera...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the object of the present invention is to provide a thin film thermal print head with low cost and fast welding speed and its manufacturing method, so as to solve the technology of high cost and slow welding speed of using gold wire to connect IC and aluminum circuit in the background technology question

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