Patent ID: 8785972
Filing Date: 2014-07-22
Classification: H01L

Abstract:
1. A semiconductor electrostatic protection circuit device, comprising: a first first-conductivity type well extending in a first direction over a semiconductor substrate of the semiconductor electrostatic protection circuit device, the first first-conductivity type well having a first long side and a second long side opposite the first long side; at least one second first-conductivity type well extending in a second direction over the semiconductor substrate and perpendicular to the first direction with one end coupled to the second long side of the first first-conductivity type well; a second-conductivity type well formed over the substrate and enclosing the first first-conductivity type well and the at least one second first-conductivity type well; at least one first high-concentration second-conductivity type region extending in the second direction on a surface of the second first-conductivity type well; and at least one first high-concentration first-conductivity type region extending in the second direction on a surface of the second-conductivity type well, the first high-concentration first-conductivity type region facing the first high-concentration second-conductivity type region.