US 6,388,857 B1 · Semiconductor circuit device with improved surge resistance

Abstract

Inter power supply surge voltage transmitting diode element is formed by a buried layer formed in a semiconductor substrate, a well region formed on the buried layer with its bottom portion being in contact with the buried layer, and impurity regions of mutually different conductivity types formed apart from each other at the surface of the well region. One of the impurity regions is electrically coupled to a first power supply line on which a surge voltage generates, and the other is electrically coupled to a second power supply line absorbing the surge voltage. The surge transmitting element includes a plurality of elements arranged parallel to each other between the first and second power supply lines. The second power supply line supplies the power supply voltage to an internal circuitry which consumes relatively small current.

Claims13

Dependent claims

A semiconductor circuit device, comprising:

a first power source line arranged extending continuously in a shape of a loop along a periphery of a semiconductor rectangular region, transmitting a first power source voltage;
input circuitry coupled to said first power source line and generating an internal signal in accordance with a signal applied to an input node;
a second power source line arranged separate from said first power source line, continuously extending in a shape of a loop along the periphery of said semiconductor rectangular region and transmitting a second power source voltage, said second power source voltage being the same in logic level as said first power source voltage;
a plurality of diode elements coupled parallel to each other between the first and second power source lines;
and
a first circuit coupled to said second power source line and consuming said second power source voltage in operation.

3 more elements

Dependencies are inferred from the claim text.

Semiconductor circuit device with improved surge resistance

Life of this patent

Semiconductor circuit device with improved surge resistance

Life of this patent

Abstract

Claims13