Sealing ring with esd protection

Abstract

The invention discloses a sealing ring having an ESD protection function. The sealing ring comprises a substrate portion structure and a metal connection structure, wherein the substrate portion structure comprises a first conductive type well region, and first to third doping regions formed on a surface of the well region, wherein the first and second doping regions are both second conductive type heavy doping, the third doping region is first conductive type heavy doping, the first doping region, the first conductive type well region and the second doping region form a bipolar transistor, the metal connection structure comprises two electrode structures, the first electrode structure is electrically connected with the first doping region, the second electrode structure is electrically connected with the second and third doping regions, and a portion between a collector region and a base region of the bipolar transistor is made to be a reverse-biased structure through the voltage applied to the first and second electrode structures. The sealing ring is advantaged in that the ESD protection function is realized, an area of the sealing ring can be effectively utilized to realize an ESD protection structure, the area can be saved, and an integration level is improved.

Description

technical field [0001] The invention relates to a semiconductor integrated circuit, in particular to a sealing ring with ESD protection function. Background technique [0002] On the one hand, with the decrease of the feature size of semiconductor devices and the substantial improvement of chip integration, and the electromagnetic environment that semiconductor products need to adapt to is getting worse and worse, so the electrostatic discharge (ESD) protection design is important in improving the reliability and yield of products. appears to be very important. Usually, in order to achieve better ESD capability, the chip area that needs to be consumed is very considerable. [0003] On the other hand, the seal-ring structure is a very important part in the back-end process of semiconductor manufacturing. A seal ring is a stress protection ring around the periphery of an integrated circuit (IC). It protects the chip's internal circuitry from damage from the scribe line area...

AI Technical Summary

Problems solved by technology

[0005] therefore figure 1 The existing sealing ring shown has only a protection function against mechanical stress and does not have an ESD protection function

Images