Electrostatic discharge protection device

An electrostatic discharge protection and electrostatic discharge technology, applied in the field of electrostatic discharge protection devices, can solve problems such as damage and malfunction of integrated circuits

Inactive Publication Date: 2016-06-22
NUVOTON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]However, in the case where the sustain voltage is too low to be lower than the normal operating voltage of the integrated circuit, if the device is disturbed by external noise under normal operating conditions, it will Cause a latch-up (LatchUp) effect, resulting in malfunction or damage to integrated circuits

Method used

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Embodiment Construction

[0016] The following is a detailed description of the embodiments in conjunction with the accompanying drawings, but the provided embodiments are not used to limit the scope of the present invention, and the description of the structure and operation is not used to limit the sequence of execution, and any recombination of devices The structure of the resulting device with equal efficacy is within the scope of the present invention. In addition, the drawings are for illustrative purposes only and are not drawn to original scale.

[0017] As used herein, "about", "approximately" or "approximately" generally means that the error or range of the value is within 20%, preferably within 10%, and more preferably It is within five percent. If there is no explicit statement in the text, the numerical values ​​mentioned are regarded as approximate values, that is, the error or range indicated by "about", "approximately" or "approximately".

[0018] In addition, regarding the "coupling"...

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Abstract

The invention provides an electrostatic discharge protective device including a silicon control rectifier equivalent circuit, a switch, and a control circuit. The electrostatic discharge protective device includes a first equivalent transistor and a second equivalent transistor. When the switch is turned on, an electrostatic discharging current corresponding to a positive electrostatic discharging charge discharges from a welding pad via the switch, the first equivalent transistor and the second equivalent transistor. The control circuit controls the on and off of the switch based on the control voltage generated by the electrostatic discharging current, and when the switch is turned off, the electrostatic discharging current corresponding to the positive electrostatic discharging charge discharges from the welding pad via the second equivalent transistor. According to the electrostatic discharge protective device provided, the generation of latch-up can be prevented when an electrostatic discharge protective mechanism is started.

Description

technical field [0001] The present disclosure relates to an electronic device, and more particularly to an electrostatic discharge protection device. Background technique [0002] Generally speaking, various electronic devices are equipped with an electrostatic discharge (ESD) protection mechanism, so as to prevent the electronic device from being momentarily caused by static electricity when the human body has too much static electricity and touches the electronic device. Damage caused by large current, or prevent the electronic device from being affected by the environment or the static electricity of the transportation tool and cause it to fail to operate normally. [0003] In electrostatic discharge devices, silicon-controlled rectifiers (Silicon Controlled Rectifier, SCR) can generally be set as electrostatic discharge protection devices, and use their low holding voltage (Holding Voltage) after sudden collapse to protect integrated circuits from electrostatic discharge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02H01L27/02
CPCH01L2924/0002
Inventor 陈哲宏赖明芳
Owner NUVOTON
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