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The very narrow mesa structures based on our 7th generation IGBT process are fabricated and it is found that the device with the narrowest mesa shows very poor short circuit (SC) withstand capability although it suppresses the conduction loss considerably. This poor SC capacity is caused by non-saturated output characteristics which are originated by collector bias induced barrier lowering in the...
In the sub-100-nm CMOS generation, a large local Vth variability degrades the 6T-SRAM cell stability, so that we have to consider this local variability as well as the global variability to achieve high-yield SRAM products. Therefore, we need to employ some assist circuits to expand the SRAM operating margin. We propose a variability-tolerant 6T-SRAM cell layout and new circuit techniques to improve...
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