公开(公告)号：US09509137B2

公开(公告)日：2016-11-29

申请号：US14272115

申请日：2014-05-07

Applicant: MACRONIX International Co., Ltd.

Inventor： Shih-Yu Wang ,  Tao-Cheng Lu ,  Yao-Wen Chang

IPC: H02H3/20 ,  H02H9/04 ,  H01L27/02

CPC classification number: H02H9/046 ,  H01L27/0259

Abstract: An electrostatic discharge protection device including a PNP transistor, a protection circuit and an adjustment circuit is provided. An emitter of the PNP transistor is electrically connected to a pad, and a collector of the PNP transistor is electrically connected to a ground. The protection circuit is electrically connected between a base of the PNP transistor and the ground, and provides a discharge path. When an electrostatic signal occurs on the pad, the electrostatic signal is conducted to the ground through the discharge path and the PNP transistor. The adjustment circuit is electrically connected between the emitter and the base of the PNP transistor. When a power voltage is supplied to the pad, the adjustment circuit provides a control voltage to the base of the PNP transistor according to the power voltage, so as to prevent the emitter and the base of the PNP transistor from being forward biased.

Abstract translation: 提供一种包括PNP晶体管，保护电路和调整电路的静电放电保护装置。 PNP晶体管的发射极电连接到焊盘，并且PNP晶体管的集电极电连接到地。 保护电路电连接在PNP晶体管的基极与地之间，并提供放电路径。 当在焊盘上发生静电信号时，静电信号通过放电路径和PNP晶体管传导到地面。 调节电路电连接在PNP晶体管的发射极和基极之间。 当向焊盘提供电源电压时，调节电路根据电源电压向PNP晶体管的基极提供控制电压，以防止PNP晶体管的发射极和基极正向偏置。