Patent ID: 9085143
Filing Date: 2015-07-21
Classification: B41J

Abstract:
1. A substrate for an inkjet print head comprising: a base; a plurality of heating resistors for heating ink, the heating resistors being disposed on the base and producing heat in a case where the heating resistors are energized; a first protection layer disposed on the heating resistors and having electrical insulation properties; and a second protection layer disposed on the first protection layer and having conductivity, wherein the second protection layer includes individual sections disposed to individually cover the plurality of heating resistors, a common section, and connection sections interposed between the individual sections and the common section and connecting the individual sections and the common section, the individual sections corresponding to adjacent heating sections are separated from each other with a gap therebetween, the connection sections respectively have a part, the cross-sectional area of which is narrower than a cross-sectional area of the corresponding individual sections, the cross-sectional areas being orthogonal to the base, and the connection sections are disposed at positions to be in contact with ink and include a material which changes to an electrically insulating film by an electrochemical reaction with the ink.