US 12,446,324 B2
Device and system for ESD protection
Dong Wang, Chandler, AZ (US); Jim Nolan, Chandler, AZ (US); and HongZhong Xu, Chandler, AZ (US)
Assigned to Microchip Technology Incorporated, Chandler, AZ (US)
Filed by Microchip Technology Incorporated, Chandler, AZ (US)
Filed on Nov. 28, 2023, as Appl. No. 18/520,616.
Claims priority of provisional application 63/460,687, filed on Apr. 20, 2023.
Prior Publication US 2024/0355809 A1, Oct. 24, 2024
Int. Cl. H10D 89/60 (2025.01)
CPC H10D 89/811 (2025.01) [H10D 89/921 (2025.01)] 15 Claims
OG exemplary drawing
 
1. A device for ESD protection comprising:
a current limiting resistor with a first node coupled to a pad and a second node coupled to an isolation n-well;
a protection transistor located in a p-well inside the isolation n-well, the protection transistor including:
a source node coupled to the pad;
a gate node coupled to the pad, and
a bulk node coupled to the pad;
a protection clamp located outside the isolation n-well, the protection clamp having a cathode coupled to a drain node of the protection transistor and an anode coupled to ground.