Patent ID: 7411767
Filing Date: 2008-08-12
Classification: H01L

Abstract:
1. An electrostatic discharge (ESD) protection circuit structure comprising: a plurality of first power lines; a plurality of second power lines; an ESD bus; a plurality of first internal circuits, each coupled between one of the first power lines and one of the second power lines; a third power line; a fourth power line; a second internal circuit connected to the third power line and coupled to the fourth power line; a plurality of first ESD bi-directional connection cells, each connected between one of the first power lines and the third power line; a plurality of second ESD bi-directional connection cells, each coupled between one of the second power lines and the ESD bus; an ESD bi-directional connection cell coupled between the fourth power line and the ESD bus; and an ESD clamp coupled between the third power line and the ESD bus.