Patent ID: 11973002
Assignee: DENKA COMPANY LIMITED
Field: Surface technology, coating (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 6:
7. A method of manufacturing a composite substrate, the method comprising:
forming a precursor film by spraying metallic particles containing at least one selected from the group consisting of copper and a copper alloy on a surface of a metal layer provided on a ceramic plate and the metal layer containing at least one selected from the group consisting of aluminum and an aluminum alloy; and
heating the precursor film to obtain a thermal sprayed layer and to generate an intermetallic compound containing copper and aluminum as constituent elements so as to be scattered between the metal layer and the thermal sprayed layer, and
wherein a length of the intermetallic compound along a boundary line on the metal layer side of the thermal sprayed layer is 10 μm or less when viewed from a cross-section cut along a stacking direction of the metal layer and the thermal sprayed layer.