Dynamic substrate bias system and method for suppressing negative bias temperature instability

Abstract

This invention discloses a system and method for suppressing negative bias temperature instability in PMOS transistors, the system comprises a PMOS transistor having a source connected to a power supply, and a voltage control circuitry configured to output a first and a second voltage level, the first and second voltage levels being different from each other, the first voltage level is lower than the power supply voltage, the second voltage level is equal to or higher than the power supply voltage, wherein when the PMOS transistor is turned on, the first voltage level is applied to a substrate of the PMOS transistor, and when the PMOS transistor is turned off, the second voltage level is applied to the substrate of the PMOS transistor.

Description

[0001] This application is a divisional application of a patent application with an application date of June 30, 2009, an application number of 200910151528.8, and an invention title of "A Dynamic Substrate Bias System and Method for Suppressing Negative Bias High Temperature Instability". technical field [0002] The present invention relates to an integrated circuit design, in particular to a negative bias suppressing method for improving the device performance of a P-channel metal-oxide-semiconductor transistor and the reliability of negative bias high-temperature instability by using a dynamic substrate bias Dynamic substrate biasing systems and methods for high temperature instability. Background technique [0003] For deep submicron complementary metal oxide semiconductors, especially for P-channel metal oxide semiconductor transistors, negative bias temperature instability (Negative Bias Temperature Instability; NBTI) is an important factor affecting device reliability...

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Problems solved by technology

[0005] It can be seen that the reliability of the above-mentioned existing deep sub-micron complementary metal oxide semiconductor components is affected by the instability of negative bias voltage and high temperature, which makes it inconvenient and defective in use, and needs to be further improved.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable structure and method for general products and methods to solve the above-mentioned problems. This is obviously a problem that relevant industry players are eager to solve

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