Patent ID: 9397085
Filing Date: 2016-07-19
CPC Classification: H01L

Claim Text:
1. An integrated circuit with a bidirectional ESD bipolar transistor comprising: an isolated well with a first dopant type forming a base diffusion; an emitter diffusion with a second dopant type in the isolated well wherein the emitter diffusion forms a first pn junction on a first side of the base diffusion; a collector diffusion with the second dopant type in the isolated well wherein the collector diffusion forms a second pn junction on a second side of the base diffusion and wherein the emitter diffusion and the collector diffusion are identical; silicide blocked from the base diffusion; silicide blocked from the first pn junction, and from the second pn junction; silicide blocked from equal portions of the emitter and the collector diffusions; the emitter diffusion coupled to Vss; and the collector diffusion coupled to an input pin.