Abstract: An electro-static discharge (ESD) protection device includes a first diode pair coupled between an input/output pad and a supply voltage terminal to form a first discharge path, and a second diode pair coupled between the input/output pad and a ground terminal to form a second discharge path. The first diode pair includes a first P-type diode and a second P-type diode coupled in parallel, and the second diode pair includes a first N-type diode and a second N-type diode coupled in parallel.

Abstract: An electro-static discharge (ESD) protection device includes a first well region and a second well region disposed to contact each other, a first diffusion region and a second diffusion region disposed in the first well region spaced apart from each other, a third diffusion region and a fourth diffusion region disposed in the second well region spaced apart from each other, a fifth diffusion region of the second conductivity type disposed in the first well region spaced apart from the first and second diffusion regions, a resistive pattern coupled to the first diffusion region through a first contact plug, a first electrode coupled to the second diffusion region through a second contact plug and electrically coupled to the resistive pattern, and a second electrode coupled to the third diffusion region through a third contact plug and coupled to the fourth diffusion region through a fourth contact plug.

Abstract: An electro-static discharge (ESD) protection device includes a first well region, a second well region, a first diffusion region disposed in the first well region, a plurality of second diffusion regions disposed in the first well region separated from each other by the first diffusion region in a first direction, a third diffusion region disposed in the second well region, a plurality of fourth diffusion regions disposed in the second well region separated from each other by the third diffusion region in the first direction, a resistive pattern coupled to the first diffusion region through a first contact plug, a first electrode coupled to the plurality of second diffusion regions and electrically coupled to the resistive pattern, and a second electrode coupled to the third diffusion region and coupled to the plurality of fourth diffusion regions.

Abstract: An electro-static discharge (ESD) protection device includes a first well region and a second well region disposed to contact each other, a first diffusion region and a second diffusion region disposed in the first well region spaced apart from each other, a third diffusion region and a fourth diffusion region disposed in the second well region spaced apart from each other, a resistive pattern coupled to the first diffusion region through a first contact plug, a first electrode coupled to the second diffusion region through a second contact plug and electrically coupled to the resistive pattern, and a second electrode coupled to the third diffusion region through a third contact plug and coupled to the fourth diffusion region through a fourth contact plug.