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We prepare a microdevice to investigate effects of mechanical stress on permeability of vascular endothelial cells (ECs) toward further progress of nano-medicine such as DDS. An array of cell culture channels as pseudo blood vessels is integrated onto a stretching stimulator (Fig. 1). The stretching stimulator has serially connected pneumatic balloon arrays and generates strain gradation by swelling...
A special device-matrix-array (DMA) TEG of 16k bit SRAM cells has been designed. Static noise margins (SNM) and 6 transistors in cells are directly measured and their fluctuations are examined. It is found for the first time that one-side SNM follows the normal distribution up to ±4σ. It is also found that the cell stability is worse than circuit simulation using Vth of measured 6 transistors. Furthermore,...
The effects of <110> and <111>-directed uniaxial compressive strain on hole mobility in (110)-oriented ultra-thin body pFETs have been investigated systematically for the first time. It is found that the strain effect in <110>-directed ultra-thin body pFETs is severely degraded due to small change in conduction effective mass and density-of-states reduction. It is also confirmed...
The concept of the post-fabrication self-convergence scheme is applied to improve the SRAM stability. It is shown by measurement-based simulation that static noise margin (SNM) of SRAM are self-improved by selective non-volatile Vth shift of transistor in each cell.
A new concept for suppressing variability in SRAM cells and logic transistors is proposed. The novel method utilizes self-convergence mechanisms: Vth of transistors with low Vth is selectively raised by applying high bias voltage to all transistors collectively after chip fabrication, resulting in lower variability in retention-noise-margin (RetNM) in SRAM and Vth in logic transistors. The concept...
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