Patent ID: 11955472
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A structure comprising:
a hybrid semiconductor substrate comprising bulk semiconductor and semiconductor-on-insulator regions; and
a semiconductor-controlled rectifier on the hybrid semiconductor substrate and comprising:
in a first bulk semiconductor region, a first Pwell, a first P-type contact region on the first Pwell and electrically connected to a cathode terminal, a first Nwell positioned laterally adjacent to the first Pwell, and a first N-type contact region on the first Nwell and electrically connected to the cathode terminal;
in a second bulk semiconductor region, a second Nwell and a second P-type contact region and a second N-type contact region on the second Nwell and electrically connected to an anode terminal; and
in a semiconductor-on-insulator region positioned laterally between the first bulk semiconductor region and the second bulk semiconductor region, a second Pwell positioned laterally between and abutting the first Nwell and the second Nwell, an insulator layer on the second Pwell, and a semiconductor layer on the insulator layer,

wherein the semiconductor layer is a monocrystalline semiconductor layer,
wherein the insulator layer and the semiconductor layer form a gate structure on the second Pwell,
wherein the gate structure is electrically connected to the anode terminal,
wherein the first P-type contact region, the first N-type contact region, the semiconductor layer, the second P-type contact region, and the second N-type contact region are arranged in parallel stripes each positioned laterally between and abutting trench isolation regions,
wherein the first P-type contact region, the first N-type contact region, the second P-type contact region, and the second N-type contact region have a first length, and
wherein the semiconductor layer has a second length that is less than the first length.