A thermal head according to the disclosure includes: a substrate; a heat generating section disposed on the substrate; an electrode disposed on the substrate so as to be electrically connected to the heat generating section; a protective layer which covers the heat generating section and part of the electrode, the protective layer being formed of an inorganic material; a cover layer disposed on the protective layer, the cover layer being formed of a resin material; and inorganic particles disposed on a surface of the protective layer so as to protrude from the surface. Moreover, the inorganic particles each comprise a first portion located inside the cover layer and a second portion located inside the protective layer.

A thermal head includes a substrate; a plurality of heat generating portions; a common electrode disposed on the substrate and electrically connected to the plurality of heat generating portions; a plurality of individual electrodes disposed on the substrate and each electrically connected to a corresponding one of the plurality of heat generating portions; a first insulation layer disposed on the heat generating portions, a part of the common electrode, and a part of the individual electrodes; a second insulation layer located adjacent to the first insulation layer and disposed on a part of the individual electrodes; and a static removing layer disposed on the first insulation layer and grounded. The static removing layer includes a first portion disposed on an upper surface of the first insulation layer and a second portion electrically connected to the first portion and disposed on an upper surface of the second insulation layer.

A thermal head includes: a head base body including a substrate and a plurality of heat generating sections disposed on the substrate; connection portions which are electrically connected to the head base; a connection member which is electrically connected to the connection portions; and a first cover member which covers the connection portions, the first cover member including a plurality of protruding portions provided on an upper surface of the first cover member at predetermined intervals in a main scanning direction.

A thermal head includes: a substrate; a heat generating section which is disposed on the substrate; a plurality of driving ICs including first and second driving ICs which are disposed on the substrate and electrically coupled to the heat generating section; and a cover member covering the first and second driving ICs. The cover member is disposed in an inter-driving IC region between the first driving IC and the second driving IC and above and below the inter-driving IC region, and includes a first void.

A thermal print head includes a substrate, a resistor layer and a wiring layer. The substrate is made of a single crystal semiconductor and includes an obverse surface facing in one sense of a thickness direction. The resistive layer is supported by the substrate and includes a plurality of heat generating parts arranged side by side in a main scanning direction. The wiring layer is supported by the substrate and forms a conductive path to the plurality of heat generating parts. The wiring layer includes a conductive part and a heat generating sub-part for each of the plurality of heat generating parts, where the conductive part has a lower resistance value per unit length in a sub-scanning direction than the heat generating part, and where the heat generating sub-part has a resistance value per unit length in the sub-scanning direction that falls between the respective resistance values of the heat generating part and the conductive part. The substrate includes a ridge raised from the obverse surface and extending in the main scanning direction. The heat generating part, the heat generating sub-part and the conductive part are disposed on the ridge. The heat generating sub-part is located between the heat generating part and the conductive part in the sub-scanning direction.

A thermal head includes a substrate, a bonding material, an electrically conductive member, and a gold electrode. The bonding material is located on the substrate and contains gold and tin. The electrically conductive member is located on the bonding material. The gold electrode is located on the substrate and electrically connected to the bonding material.

The invention provides an inkjet print apparatus and a recovery method of an inkjet print apparatus, which can suppress deterioration of productivity. For that purpose, timing, at which a recovery operation is practiced in accordance with a facing time period of a print head and a print medium and a not facing time period thereof, is set.

A thermal head including: a common electrode that includes a plurality of comb teeth portions extending in a first direction in which a paper is conveyed; a plurality of discrete electrodes, each of which extends in the first direction, and is arranged between the comb teeth portions; and a resistor that is electrically connected to the comb teeth portions and the discrete electrodes, and has such a shape that two connection positions of two discrete electrodes adjacent to each other and the resistor shift from each other in the first direction.

A thermal head according to the disclosure includes: a substrate; a heat generating section disposed on the substrate; an electrode disposed on the substrate so as to be electrically connected to the heat generating section; a protective layer which covers the heat generating section and part of the electrode, the protective layer being formed of an inorganic material; a cover layer disposed on the protective layer, the cover layer being formed of a resin material; and inorganic particles disposed on a surface of the protective layer so as to protrude from the surface. Moreover, the inorganic particles each comprise a first portion located inside the cover layer and a second portion located inside the protective layer.

A thermal head of the disclosure includes a substrate; a heat generating section disposed on the substrate; an electrode disposed on the substrate, the electrode having a connecting portion connected to the heat generating section; and a protective layer which covers the heat generating section and the connecting portion of the electrode, a part of the protective layer which is disposed on the connecting portion having a closed first void therein.