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

Claim 2:
3. The substrate for a liquid ejection head according to claim 1 comprising multiple wiring layers,
wherein the insulating film consists of multiple interlayer insulating films,
and the multiple interlayer insulating films comprise:
a first interlayer insulating film for insulating the heating resistor layer and a first wiring layer adjacent to the heating resistor layer, and
a second interlayer insulating film for insulating the first wiring layer and a second wiring layer adjacent to the second interlayer insulating film,
wherein at least a part of the first interlayer insulating film and the second interlayer insulating film comprises a material layer represented by said SiwOxCyNz.