Yong Hyeon Yi;Robert Bloom;Armen Kteyan;Alexander Volkov;Jun-Ho Choy;Stephane Moreau;Valeriy Sukharev;Chris H. Kim
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A Power Grid Electromigration Test Chip for Lifetime Characterization and Model Calibration
This work presents silicon data from 28 nm test chips specifically designed to study electromigration (EM) induced lifetime effects. The power grids were generated by an automatic place-and-route tool to create realistic device-under-tests (DUT) to capture power grid EM aging behaviors and lifetimes. Poly-silicon quasi-load cells mimicking the circuit current were employed to withstand high temperature stress. 1,024 local voltages throughout the power grid were tapped out to monitor the voiding locations and IR drop trends with stress. Four power grid architectures with different metal configurations were tested under different temperatures and currents. EM effects under different temperatures and current cycling conditions were also studied.
期刊介绍:
The scope of the publication includes, but is not limited to Reliability of: Devices, Materials, Processes, Interfaces, Integrated Microsystems (including MEMS & Sensors), Transistors, Technology (CMOS, BiCMOS, etc.), Integrated Circuits (IC, SSI, MSI, LSI, ULSI, ELSI, etc.), Thin Film Transistor Applications. The measurement and understanding of the reliability of such entities at each phase, from the concept stage through research and development and into manufacturing scale-up, provides the overall database on the reliability of the devices, materials, processes, package and other necessities for the successful introduction of a product to market. This reliability database is the foundation for a quality product, which meets customer expectation. A product so developed has high reliability. High quality will be achieved because product weaknesses will have been found (root cause analysis) and designed out of the final product. This process of ever increasing reliability and quality will result in a superior product. In the end, reliability and quality are not one thing; but in a sense everything, which can be or has to be done to guarantee that the product successfully performs in the field under customer conditions. Our goal is to capture these advances. An additional objective is to focus cross fertilized communication in the state of the art of reliability of electronic materials and devices and provide fundamental understanding of basic phenomena that affect reliability. In addition, the publication is a forum for interdisciplinary studies on reliability. An overall goal is to provide leading edge/state of the art information, which is critically relevant to the creation of reliable products.