A thermal printhead includes a substrate, a resistor layer with heat generation portions supported by the substrate and aligned in a primary scanning direction, a wiring layer supported by the substrate to form a conductive path to the heat generation portions, an insulating layer interposed between the substrate and the resistor layer, and a reflection layer located opposite to the heat generation portions with respect to the insulating layer. The reflection layer overlaps with the heat generation portions as viewed in a thickness direction of the heat generation portions and has a greater heat reflectivity than the insulating layer.

A thermal head includes: an underglaze layer provided on an insulating substrate; an electrode provided on the underglaze layer; a heat generator provided on the electrode; a first protective layer containing a glass material and covering at least the heat generator; and a second protective layer provided on the first protective layer, having a melting point higher than that of the first protective layer, and made of a material whose thermal expansion coefficient at a temperature of 1000 C. or lower is substantially constant.

A liquid discharge head includes a recording element substrate. The recording element substrate includes a discharge aperture forming member defining a discharge aperture from which a liquid is discharged and a substrate having a pressure generating element that pressurizes the liquid so as to discharge the liquid. The liquid discharge head also includes a cover member that defines an opening through which the discharge aperture is exposed. The cover member is disposed on a side of the recording element substrate on which the discharge aperture is formed. In the liquid discharge head, the recording element substrate further includes an electrode disposed on a side of the substrate on which the discharge aperture forming member is formed and an insulation member that covers the electrode. In addition, the insulation member is covered by the cover member.

A thermal print head includes: a substrate having an obverse surface; a plurality of heat generators arranged on the substrate in a main scanning direction; and a wiring layer provided on the substrate and constituting an energization path to the heat generators. The substrate has a protrusion protruding from the obverse surface and extending in the main scanning direction. The protrusion has a top portion having the largest distance from the obverse surface, and an inclined portion connected to the top portion in a sub-scanning direction. The inclined portion is inclined relative to the obverse surface at a predetermined angle. Each of the plurality of heat generators extends across a boundary between the top portion and the inclined portion. Each of the heat generators is formed on at least a part of the top portion and at least a part of the inclined portion in the sub-scanning direction.

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 of the present disclosure includes a substrate, a heating part, an electrode, a protection layer, and a coating layer made of a resin material. The heating part is placed on or above the substrate. The electrode is placed on or above the substrate and connected to the heating part. The protection layer is placed on or above the heating part and the electrode. The coating layer is placed on or above the electrode and the protection layer. The protection layer includes a recessed part that is opened on an upper surface and that extends along a thickness direction of the protection layer. The recessed part includes an inner wall having a plurality of recesses and projections, and the resin material is disposed inside the recessed part.

A system and method for selective heating and/or sintering of a material including first and second substrates, an array of one or more resistive heating elements arranged on a planar surface of a substrate and material to be heated located on the other substrate.

A thermal print head includes: a substrate having an obverse surface; a plurality of heat generators arranged on the substrate in a main scanning direction; and a wiring layer provided on the substrate and constituting an energization path to the heat generators. The substrate has a protrusion protruding from the obverse surface and extending in the main scanning direction. The protrusion has a top portion having the largest distance from the obverse surface, and an inclined portion connected to the top portion in a sub-scanning direction. The inclined portion is inclined relative to the obverse surface at a predetermined angle. Each of the plurality of heat generators extends across a boundary between the top portion and the inclined portion. Each of the heat generators is formed on at least a part of the top portion and at least a part of the inclined portion in the sub-scanning direction.

A thermal head according to the present disclosure includes: a substrate; a first electrode; a heat generating section; a second electrode; a resin layer; and a protective layer. The first electrode is located on the substrate. The heat generating section is located on the substrate. The second electrode is located on the substrate so as to be electrically connected to the heat generating section and the first electrode. The resin layer is located on the first electrode. The protective layer is located on the resin layer. Moreover, the resin layer includes a first portion inserted in the first electrode.

A heat generating member includes: a hollow cylindrical part that is rotatable about a rotation axis and extends in an axial direction; a first heat generating component provided on an inner surface of the cylindrical part and configured to generate heat when energized; a first connecting component provided on an inner side relative to the cylindrical part and electrically connected to the first heat generating component, the first connecting component being rotatable together with the cylindrical part; a second connecting component provided on a further inner side relative to the cylindrical part than the first connecting component and electrically connected to a power source, the second connecting component being rotatable relative to the cylindrical part; a rotary supporting component that electrically connects the first connecting component and the second connecting component to each other and supports the first connecting component while allowing the first connecting component to rotate relative to the second connecting component; and a second heat generating component provided on a further inner side relative to the cylindrical part than the second connecting component and extending through the cylindrical part in a longitudinal direction of the cylindrical part, the second heat generating component being configured to generate heat when energized, the second heat generating component having a heat generating area different from a heat generating area of the first heat generating component.