Patent ID: 8179644

Claim:
An ESD protection circuit electrically connected to a first conductive line and a second conductive line and comprising a first ESD protection circuit unit, wherein the first ESD protection circuit unit comprises: a first active device comprising a first source, a first drain, and a first gate, wherein the first source and the first gate are electrically connected to the first conductive line; a second active device comprising a second source, a second drain, and a second gate, wherein the second gate is electrically connected to the first conductive line, the second source is electrically connected to the first drain, and the second drain is electrically connected to the second conductive line; and a third active device comprising a third source, a third drain, and a third gate, wherein the third drain is electrically connected to the first drain and the second source, and the third source and the third gate are electrically connected to the second conductive line.