Electrostatic discharge protection device

Abstract

The invented electro-static discharge (ESD) protection device utilizes the resistance-capacitance (RC) circuit to distinguish between the overshoot phenomenon caused at the moment of the power and the event of static discharge. Thus for example, the ESD protection device ensures the normal operation of the modified lateral silicon controlled rectifiers (MLSCR), prevents the MLSCR from the unexpected triggering caused by the overshoot at the moment of the power on so as to increases the effectiveness of he ESD protection device.

Description

technical field [0001] The present invention relates to an electrostatic discharge (Electro-Static Discharge; ESD) protection device, in particular to an electrostatic discharge (ESD) protection device which uses a resistance capacitance (Resistance Capacitance; RC) circuit to isolate the An electrostatic discharge protection device with a modified lateral thyristor rectifier (Modified LateralSilicon Controlled Rectifiers; MLSCR) for overshoot (Overshoot) phenomenon and electrostatic discharge event (Event). Background technique [0002] When two non-conductive objects are in contact with each other, electrons may be transferred, which will cause the two non-conductive objects to generate additional charges. This additional charge is static electricity. Electrostatic discharge occurs when the static electricity accumulated on an object discharges to an object with a relatively low potential. In general, the generation of electrostatic discharge can be divided into two categ...

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Problems solved by technology

However, when the thyristor rectifier is accidentally triggered by the overshoot phenomenon caused by the moment the power is turned on, the action time of the electrostatic discharge is much shorter than the action time of the power on, and after the power is turned on, the voltage V is continuously supplied P , but because the thyristor rectifier misjudged the power-on event as an electrostatic discharge event, the thyristor rectifier did not match the supply voltage V P , the current I continues to rise, causing the thyristor rectifier to burn out due to overheating, such as image 3 shown

[0008] In view of the fact that the trigger voltage of the improved lateral thyristor rectifier of the existing electrostatic discharge protection device and the voltage to be separated, such as the voltage caused by the overshoot phenomenon of the activation power supply, the difference is not large, which often makes the electrostatic discharge protection device unable to effectively area The overshoot phenomenon and electrostatic discharge event at the moment of power-on lead to improper triggering of the improved lateral thyristor rectifier, which in turn causes damage to the electrostatic discharge protection device

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