Patent ID: 11912028
Assignee: CANON KABUSHIKI KAISHA
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A substrate for a liquid ejection head comprising:
a base material;
a heating element comprising a heating resistor layer for generating thermal energy for discharging a liquid;
a wiring layer for supplying electric power to the heating element; and
an insulating film for insulating the wiring layer,
wherein at least a part of the said insulating film includes a material layer represented by SiwOxCyNz, and
wherein w+x+y+z=100 at %, 37≤w≤60 at. %, 30≤x≤53 at. %, 6≤y≤29 at. %, and 4≤z≤9 at. %.