DRAM Static Refresh Weak Cell Characterization and Structure Analysis

Author(s):  
Sung Ho Lee ◽  
Yong Ho Yoo ◽  
Tae Jung Park ◽  
Jin Choi ◽  
Ju Hyeon Ahn ◽  
...  

Abstract Data retention characteristic is one of the most critical issues in low power DRAMs because it determines idle currents of self-refresh operation. Compared to normal healthy cells, a few ppm orders of cells in a tail distribution have much higher leakage currents. The origin of the leaky cells (so called weak cells or tail cells) has been quite arguable for the past decades [1, 2], but it should be scrutinized in order to achieve long data retention time. In this paper, we have thoroughly investigated the behavior of the retention weak cells using a newly generated combination program and TEM analysis so as to discover and explain their origins

2001 ◽  
Author(s):  
Nam-Sung Kim ◽  
Il-Gweon Kim ◽  
Jun-Ho Choy ◽  
Se-Kyeong Choi ◽  
Jo-Bong Choi ◽  
...  

2021 ◽  
Vol 24 (3) ◽  
pp. 30-34
Author(s):  
Rishi Shukla ◽  
Neev Kiran ◽  
Rui Wang ◽  
Jeremy Gummeson ◽  
Sunghoon Ivan Lee

Over the past few decades, we have witnessed tremendous advancements in semiconductor and MEMS technologies, leading to the proliferation of ultra-miniaturized and ultra-low-power (in micro-watt ranges) wearable devices for wellness and healthcare [1]. Most of these wearable sensors are battery powered for their operation. The use of an on-device battery as the primary energy source poses a number of challenges that serve as the key barrier to the development of novel wearable applications and the widespread use of numerous, seamless wearable sensors [5].


1995 ◽  
Vol 50 (1-2) ◽  
pp. 123-126 ◽  
Author(s):  
Gottfried Raab ◽  
Jürgen Jacob

Abstract The uropygial gland waxes of the South American red-legged Seriema (Cariama cristata (L., 1766)) were found to be composed of unbranched alcohols and 2,2′-dialkyl-substituted acetic acids which so far have not been found in skin lipids. When used as a chemosystematic character, the occurrence of this lipid class separates the order Cariamiformes (Seriemas) from all other avian orders hitherto investigated, especially from the Gruiformes (cranes and rails) to which they have been tentatively attributed in the past. From the GC retention time data now available for a series of 2-alkyl-substituted fatty acid methyl esters relative retention time indices for other compounds may be predicted.


2019 ◽  
Vol 153 ◽  
pp. 8-11 ◽  
Author(s):  
Sangmin Lee ◽  
Jeonghwan Song ◽  
Seokjae Lim ◽  
Solomon Amsalu Chekol ◽  
Hyunsang Hwang

Author(s):  
Pascal Meinerzhagen ◽  
Adam Teman ◽  
Robert Giterman ◽  
Noa Edri ◽  
Andreas Burg ◽  
...  

2009 ◽  
Vol 30 (8) ◽  
pp. 846-848 ◽  
Author(s):  
Kinam Kim ◽  
Jooyoung Lee

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