×

Low capacitance ESD protection device and integrated circuit including the same

  • US 6,784,498 B1
  • Filed: 03/31/2003
  • Issued: 08/31/2004
  • Est. Priority Date: 11/07/2002
  • Status: Active Grant
First Claim
Patent Images

1. A low capacitance ESD protection device comprising:

  • a substrate;

    a well of a first conductivity type in the substrate;

    a first and second transistor of the first conductivity type respectively on two sides of the well;

    a guard ring of a second conductivity type in the substrate, surrounding the well, and the first and second transistor; and

    a doped region of the second conductivity type in the well;

    wherein profiles of a drain and source region of each of the first and second transistor are un-symmetrical, and an area of the drain region is smaller than that of the source region in each of the first and second transistor.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×