Rohm Co., Ltd.

Hideaki Hoki

Tomohiko Horikawa

Tomoharu Horio

Toshihiko Takakura

Shinobu Obata

Kunio Motoyama

Minoru Sakamoto

Hiromi Ogata

Hideo Taniguchi

Masatoshi Nakanishi

Hiroaki Hayashi

Mitsuhiko Fukuda

Haruhiko Yamashita

Yasuzo Matsuo

The object is to provide a thermal print head capable of improving printing quality on a medium. The Solution is to provide a base memberincluding a recess, a heat storage regionformed in the recess, a resistor layerformed on the base member, and an electrode layerformed on the base memberand electrically connected to the resistor layer. The resistor layerincludes a heating portionspanned between two portions of the electrode layerspaced from each other as viewed in a thickness direction Z of the base member. The heating portionis located so as to overlap the recessas viewed in the thickness direction Z. The base memberis made of a material having a thermal conductivity of 100 to 300 W/(m&#xb7;K).

Thermal print head and thermal printer

A thermal printhead includes a substrate, a resistor layer formed on the substrate, an electrode layer formed on the substrate and electrically connected to the resistor layer, and an insulating layer. The electrode layer includes a first electrically conductive portion and a second electrically conductive portion spaced apart from each other. The resistor layer includes a heater portion that bridges the first electrically conductive portion and the second electrically conductive portion as viewed in the thickness direction of the substrate. The insulating layer includes a portion positioned between the electrode layer and the heater portion. This arrangement reduces formation of a eutectic region between the heater portion and the electrode layer.

Thermal printhead and method of manufacturing the same

A method of making a casing of an image sensor is provided. The method includes the steps of preparing the casing, and applying a static electricity preventive to the casing. The casing is formed with a light passage configured to conduct light emitted from a light source. The static electricity preventive is applied to the inner surfaces of the casing defining the light passage. While the application of the preventive is performed, flashes formed at the light passage are removed.

Casing of image sensor and method of making the same

A thin-film type thermal print head has a resistor layer formed over an insulative substrate, a conductor layer having a specified planar pattern overlapping the resistor layer, a portion of the resistor layer serving as a heat-emitting part which is not covered by the conductor layer, and a protective layer formed over the heat-emitting part and at least a portion of the conductor layer adjacent to the heat-emitting part. The protective layer may be formed as a conductive layer with resistance greater than that of the heat-emitting part such that static electricity which may be generated by the friction with printing paper can quickly escape to the conductor layer. The protective layer may also include a wear-resisting layer of a prior art type between the conductive layer and the conductor layer, a portion of the conductive layer being preferably connected to the conductor layer. The conductive layer is preferably a mixed layer of SiC and ZrB.sub.2 containing ZrB.sub.2 by 5-20 molar %, formed by sputtering or chemical vapor deposition and having surface resistance of 10.sup.6 -10.sup.9 .OMEGA..

Thin-film thermal print head and method of producing same

Thermal printhead

Growing community of inventors

Kyoto, Japan

Hideaki Hoki