thermal print head

Abstract

A thermal print head includes a substrate, an electrode layer supported on the substrate and provided with a plurality of mutually spaced-apart portions, a resistor layer provided with a plurality of heating portions arranged along a primary scanning direction, the heating portions lying across the spaced-apart portions, and a protective layer configured to cover the resistor layer, the protective layer including a first layer made of glass matrix and a plurality of alumina grains mixed into the glass matrix.

Description

technical field

[0001] The present invention relates to thermal printheads. Background technique

[0002] Figure 11 It is an example of an existing thermal print head (for example, refer to JP2001-232838A). Such as Figure 11 A thermal printhead 90 is shown having a partial glaze 91 formed on a substrate (not shown). The partial glaze 91 is formed of glass, extends in the main scanning direction, and has an arcuate band shape in cross section. An electrode layer 92 and a resistance layer 93 are deposited on the partial glaze 91 . The resistance layer 93 is partially energized through the electrode layer 92 to generate heat required for printing. The electrode layer 92 and the resistance layer 93 are covered by a protective layer 94 . The protection layer 94 can be formed of, for example, glass to protect the electrode layer 92 and the resistance layer 93 .

[0003] In recent years, there is a tendency to increase the printing speed, and along with the diversification o...

Examples

Embodiment Construction

[0042] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] Figure 1 to Figure 5 is a thermal print head according to a first embodiment of the present invention. The thermal printhead 101 of this embodiment includes a substrate 1 , a glaze layer 2 , an electrode layer 3 , a resistor layer 4 , a protective layer 5 and a driver IC 71 . The thermal printhead 101 is a component mounted on a printer that prints on thermal paper for producing, for example, barcode sheets and receipts. In addition, for the convenience of understanding, figure 1 The protective layer 5 is omitted in .

[0044]The substrate 1 can be formed of ceramics such as Al2O3, and the thickness can be 0.6-1.0mm. Such as figure 1 As shown, the substrate 1 has a rectangular shape extending along the main scanning direction X. As shown in FIG. The substrate 1 may also have a structure of a wiring substrate in which a base la...

technical field

[0001] The present invention relates to thermal printheads. Background technique

[0002] Figure 11 It is an example of an existing thermal print head (for example, refer to JP2001-232838A). Such as Figure 11 A thermal printhead 90 is shown having a partial glaze 91 formed on a substrate (not shown). The partial glaze 91 is formed of glass, extends in the main scanning direction, and has an arcuate band shape in cross section. An electrode layer 92 and a resistance layer 93 are deposited on the partial glaze 91 . The resistance layer 93 is partially energized through the electrode layer 92 to generate heat required for printing. The electrode layer 92 and the resistance layer 93 are covered by a protective layer 94 . The protection layer 94 can be formed of, for example, glass to protect the electrode layer 92 and the resistance layer 93 .

[0003] In recent years, there is a tendency to increase the printing speed, and along with the diversification o...

Examples

Embodiment Construction

[0042] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] Figure 1 to Figure 5 is a thermal print head according to a first embodiment of the present invention. The thermal printhead 101 of this embodiment includes a substrate 1 , a glaze layer 2 , an electrode layer 3 , a resistor layer 4 , a protective layer 5 and a driver IC 71 . The thermal printhead 101 is a component mounted on a printer that prints on thermal paper for producing, for example, barcode sheets and receipts. In addition, for the convenience of understanding, figure 1 The protective layer 5 is omitted in .

[0044]The substrate 1 can be formed of ceramics such as Al2O3, and the thickness can be 0.6-1.0mm. Such as figure 1 As shown, the substrate 1 has a rectangular shape extending along the main scanning direction X. As shown in FIG. The substrate 1 may also have a structure of a wiring substrate in which a base la...

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