Patent ID: 11870411
Assignee: SOITEC
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A process for fabricating a substrate for a radiofrequency device by joining a piezoelectric layer to a carrier substrate by way of an electrically insulating layer, the piezoelectric layer having a rough surface at its interface with the electrically insulating layer, the process comprises:
providing a piezoelectric substrate having a rough surface suitable for reflecting a radiofrequency wave;
depositing a dielectric layer on the rough surface of the piezoelectric substrate;
providing a carrier substrate;
depositing a photo-polymerizable adhesive layer on the carrier substrate;
bonding the piezoelectric substrate to the carrier substrate by way of the dielectric layer and of the adhesive layer, in order to form an assembled substrate;
irradiating the assembled substrate with a light flux in order to polymerize the adhesive layer, the adhesive layer and the dielectric layer together forming the electrically insulating layer.