从统计结果可知,在老工艺中,由于local variation 非常小,所以在K 库时会将local variation 跟global variation 全都考虑进去,STA 分析时用worst-case 模型,对应的corner 为 SS (slow nMOS-slow pMOS ) 和 FF ( fast nMOS-fast pMOS),其中SS corner 只有early derate, FF corner 只有late derate。而在新工艺...
Corner的相关概念 无梦人 echo 无梦人: 在数字IC中,Corner一般有对晶体管的偏差建模的PVT corner,以及对互连线偏差建模的RC corner。 一个corner = PVT + RC corner + OCV/AOCV/POCV 依次介绍这三个部分。1.PVT corner:芯片的延迟一般受到三个因素的影响:工艺(Process)、电压(V… ...
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PVT Variation 仿真模型随着工艺进步一直被微调,从ss 到ssg 到ssgnp 就是把Global variation 跟local variation 排列组合,要么一起门特卡洛,要么分开门特卡洛,此处概括为两种方式: Global corner with local Monte Carlo: 假设片子上所有管子都朝同一个方向偏,所有管子都有相同的Gloabl variation 和local variation, ...
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SSGFEMInterfaceSingularityConvergenceScaled condition numberIn this paper, we propose a Strongly Stable generalized finite element method (SSGFEM) for a non-smooth interface problem, where the interface has a corner. The SSGFEM employs enrichments of 2 types: the nodes in a neighborhood of the ...
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These secondary flows (possibly in conjunction with corner vortices and/or horseshoe vortices) can cause transverse (spanwise) pressure gradients outside the mid-plane. Thus a nominal 2D separation in the mid-plane cannot be investigated without the full 3D flow in the test section. Moreover, ...
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Parallel compensation, clear angle setting, program image, corner optimization, scaling and other functions opened. Laser ranging calibration and pitch compensation data opening real-time on. Multiple coordinate system can switch among workpieces rapidly. ...