| 摘要 |
Disclosed herein are a device for electrostatic protection and circuit thereof. According to the present invention, a device for electrostatic discharge protection comprises first to third wells formed on a semiconductor substrate, a first device, which includes a well pick-up region, a source region and a double diffused drain region, which are formed in predetermined regions on the first well, and a gate formed in a predetermined region on the semiconductor substrate, a second device, which includes a source region, a double diffused drain region and a first active region, which are formed in predetermined regions on the second well, and a gate formed in a predetermined region on the semiconductor substrate, and a second active region formed on the third well, wherein the gate, the source region and the well pick-up region of the first device are connected to a ground pad; the drain of the first device, and the source and the gate of the second device are connected to a power source pad; and the drain and the first active region of the second device, and the second active region are connecter to an I/O pad. Therefore, a single ESD protection device can cope with ESD stress of six modes, which can occur in each of I/O cells. Accordingly, a layout area necessary for ESD protection can be reduced.
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