Title:
ELECTROSTATIC BREAKAGE PROTECTIVE CIRCUIT
Document Type and Number:
Japanese Patent JPH0738059
Kind Code:
A
Abstract:
PURPOSE: To perform ESD protection while suppressing the drop of i/o property or the increase of driving load.
CONSTITUTION: A thyristor is composed of transistors Ta and Tb. When power application signals GP and GN are inputted, it becomes hard for thyristor to be turned on by the transistors Ts and Tu. The anode X1 or cathode X2 of the thyristor is connected, between it and the power source VDD or ground GND, to the input or output of the object of ESD protection. When the power is not made yet, ESD is not protected by the thyristor. Moreover, during application of power, the turn on of the thyristor is inhibited, and the latchup phenomena are reduced.
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Inventors:
MATSUKAWA TOYOHISA
Application Number:
JP15688993A
Publication Date:
February 07, 1995
Filing Date:
June 28, 1993
Export Citation:
Assignee:
KAWASAKI STEEL CO
International Classes:
H01L27/04; H01L21/822; H01L29/74; (IPC1-7): H01L27/04; H01L21/822; H01L29/74
Attorney, Agent or Firm:
Satoshi Takaya (2 outside)
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