Patent ID: 9676205
Date: 2017-06-13
CPC Classifications: B41J

Claim:
1. A thermal head, comprising: a substrate; a thermal storage layer disposed on the substrate, the thermal storage layer having a ridge portion which protrudes upward from the substrate; a plurality of heat generating portions disposed on the ridge portion; and a plurality of electrodes which are disposed on the substrate and electrically connected to the plurality of heat generating portions, the plurality of heat generating portions being disposed more downstream in a conveyance direction of a recording medium than a top portion of the ridge portion, at least one of the electrodes having an upper surface, a side surface facing the conveyance direction, and a first corner portion at which the side surface and the upper surface intersect, more upstream in the conveyance direction than the top portion, wherein a gap between electrodes which are adjacent to each other and are positioned on the top portion is smaller than a gap between electrodes which are adjacent to each other and are positioned on the ridge portion more upstream in the conveyance direction than the top portion.