Patent ID: 11948802
Assignee: INFINEON TECHNOLOGIES DRESDEN GMBH & CO. KG
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A device, comprising:
a thinned semiconductor substrate having a first side and a second side opposite to the first side; and
at least one radio frequency device at the first side, wherein the second side of the thinned semiconductor substrate includes a processed region to at least one of reduce leakage currents or to improve a radio frequency linearity of the at least one radio frequency device,
wherein the thinned semiconductor substrate comprises:
a bottom semiconductor layer on the second side;
an insulating layer on the bottom semiconductor layer; and
a top semiconductor layer on the insulating layer,
wherein a thickness of the bottom semiconductor layer is between 5 μm and 70 μm, and
wherein the processed region is adapted to pin a Fermi level at or near the middle of a bandgap of the thinned semiconductor substrate.