Patent ID: 11967639
Assignee: INFINEON TECHNOLOGIES AG
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. An ESD protection circuit comprising:
at least one silicon controlled rectifier (SCR) device comprising:
an n-well region disposed over an insulating layer and coupled to a first trigger node via an n-doped tap region disposed adjacent to the n-well region,
a p-well region disposed over the insulating layer adjacent to the n-well region and coupled to a second trigger node via a p-doped tap region adjacent to the p-well region, wherein the n-well region and p-well region form a first diode,
segmented p-type anode regions disposed over the insulating layer and connected to an anode node, each of the segmented p-type anode regions being surrounded by the n-well region, and
segmented n-type cathode regions disposed over the insulating layer and connected to a cathode node, each of the segmented n-type cathode regions being surrounded by the p-well region; and
a trigger device coupled to the at least one SCR.