Energy-Band-Engineered Unified-RAM (URAM) Cell on Buried <tex> $\hbox{Si}_{1 - y}\hbox{C}_{y}$</tex> Substrate for Multifunctioning Flash Memory and 1T-DRAM

Jin-Woo Han,Seong-Wan Ryu,Chung-Jin Kim,Sung-Jin Choi,Sungho Kim,Jae-Hyuk Ahn,Dong-Hyun Kim,Kyu Jin Choi,Byung Jin Cho,Jin-Soo Kim,Kwang Hee Kim,Gi-Sung Lee,Jae-Sub Oh,Myeong-Ho Song,Yun Chang Park,Je IEEE 2009 IEEE transactions on electron devices Vol.56 No.4

<P>A band-offset-based unified-RAM (URAM) cell fabricated on a Si/Si<SUB>1-y</SUB>C<SUB>y</SUB> substrate is presented for the fusion of a nonvolatile memory (NVM) and a capacitorless 1T-DRAM. An oxide/nitride/oxide (O/N/O) gate dielectric and a floating-body are combined in a FinFET structure to perform URAM operation in a single transistor. The O/N/O layer is utilized as a charge trap layer for NVM, and the floating-body is used as an excess hole storage node for capacitorless 1T-DRAM. The introduction of a pseudomorphic SiC-based heteroepitaxial layer into the Si substrate provides band offset in a valence band. The FinFET fabricated on the energy-band-engineered Si<SUB>1-y</SUB>C<SUB>y</SUB> substrate allows hole accumulation in the channel for 1T-DRAM. The band-engineered URAM yields a cost-effective process that is compatible with a conventional body-tied FinFET SONOS. The fabricated URAM shows highly reliable NVM and high-speed 1T-DRAM operations in a single memory cell.</P>

Partially Depleted SONOS FinFET for Unified RAM (URAM)—Unified Function for High-Speed 1T DRAM and Nonvolatile Memory

Han, Jin-Woo,Ryu, Seong-Wan,Kim, Chung-Jin,Kim, Sungho,Im, Maesoon,Choi, Sung Jin,Kim, Jin Soo,Kim, Kwang Hee,Lee, Gi Sung,Oh, Jae Sub,Song, Myeong Ho,Park, Yun Chang,Kim, Jeoung Woo,Choi, Yang-Kyu IEEE 2008 IEEE electron device letters Vol.29 No.7

<P> Unified random access memory (URAM) is demonstrated for the first time. The novel partially depleted (PD) SONOS FinFET provides unified function of a high-speed capacitorless 1T DRAM and a nonvolatile memory (NVM). The combination of an oxide/nitride/oxide (O/N/O) layer and a floating-body facilitates URAM operation in PD SONOS FinFETs. An NVM function is achieved by FN tunneling into the O/N/O stack and, a 1T-DRAM function is achieved by excessive-hole accumulation in the PD body. The fabricated PD SONOS FinFET shows retention time exceeding 10 years for NVM operation and program/erase time below 6 ns for 1T-DRAM in a single-cell transistor. These two memory functions are guaranteed without disturbance between them. </P>

OPTICALLY TRANSPARENT GLASS WITH VERTICALLY ALIGNED SURFACE Al2O3 NANOWIRES HAVING SUPERHYDROPHOBIC CHARACTERISTICS

JIN-YEOL KIM,,KUNBAE NOH,CHULMIN CHOI,KARLA S. BRAMMER,MARIANA LOYA,LI-HAN CHEN,SUNGHO JIN,BRAMMER 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2010 NANO Vol.5 No.2

We have shown in this paper that the self-ordered pore structure of anodic aluminum oxide (AAO) can be utilized as a basis to conveniently form large-area Al2O3 nanowire arrays on a glass surface. An aluminum oxide nanowire array has been produced by aluminum film deposition on glass followed by anodization, then simple chemical etching. The glass surface as prepared is highly superhydrophobic, with a contact angle as high as 169°. The thinness (~ 340 nm) and vertical alignment of the aluminum oxide nanowires with empty spaces in-between essentially contribute to maintaining the optical transparency of the glass substrate. Interestingly, substantially suppressed UV transmission in the ~ 300–400 nm spectrum region was observed with the presence of the Al2O3 nanowires on the glass substrate. Such a durable surface ceramic nanowire structure can be useful for producing superhydrophobic, self-cleaning glasses with a variety of potential applications such as UV protecting glass windows for high rise buildings with reduced consumption of water and cleaning chemicals for positive environmental effects.

Fully Depleted Polysilicon TFTs for Capacitorless 1T-DRAM

Jin-Woo Han,Seong-Wan Ryu,Dong-Hyun Kim,Chung-Jin Kim,Sungho Kim,Dong-Il Moon,Sung-Jin Choi,Yang-Kyu Choi IEEE 2009 IEEE electron device letters Vol.30 No.7

<P>A capacitorless 1T-DRAM is fabricated on a fully depleted poly-Si thin-film transistor (TFT) template. A heavily doped back gate with a thin back-gate dielectric is employed to facilitate the formation of a deep potential well that retains excess holes. An asymmetric double gate (n<SUP>+</SUP> front gate and p<SUP>+</SUP> back gate) shows a wider sensing current window than a symmetric double gate (n<SUP>+</SUP> front gate and n<SUP>+</SUP> back gate). This is attributed to the inherent flatband voltage between the p<SUP>+</SUP> back gate and the channel inducing a deeper potential well, which allows capacitorless 1T-DRAM operation at a low back-gate voltage. The TFT capacitorless 1T-DRAM can be applied for future stackable memory for the ultrahigh density era.</P>

Strong polyelectrolyte quantum dot surface for stable bioconjugation and layer-by-layer assembly applications

Jin, Ho,Nam, Jutaek,Park, Joonhyuck,Jung, Sungho,Im, Kyuhyun,Hur, Jaehyun,Park, Jong-Jin,Kim, Jong-Min,Kim, Sungjee Royal Society of Chemistry 2011 Chemical communications Vol.47 No.6

<P>A series of quantum dot (QD) ligands are reported that can make strong polyelectrolyte QD surfaces with sulfonates or quaternary ammoniums, which can endow QDs with excellent colloidal stability independent of the pH and ionic strength, minimal hydrodynamic size, and can be exploited to achieve stable and flexible bioconjugations and layer-by-layer assembly.</P> <P>Graphic Abstract</P><P>Strong polyelectrolyte quantum dot surface ligands with sulfonates or quaternary ammoniums are reported that can provide excellent colloidal stability, minimal hydrodynamic size, and applicability to stable and flexible bioconjugations and layer-by-layer assembly. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0cc04524a'> </P>

Colossal Magnetoresistance in La-Ca-Mn-O

Sungho Jin 한국자기학회 1997 Journal of Magnetics Vol.2 No.1

Very large change in electrical resistivity by several orders of magnitude is obtained when an external magnetic field is applied to the colossal magnetoresistance (CMR) materials such as La-Ca-Mn-O. The magnetoresistance is strongly temperature-dependent, and exhibits a sharp peak below room temperature, which can be shifted by adjusting the composition or processing parameters. The control of lattice geometry or strain, e.g., by chemical substitution, epitaxial growth or post-deposition anneal of thin films appears to be crucial in obtaining the CMR properties. The orders of magnitude change in electrical resistivity could be useful for various magnetic and electric device applications.

The Korean Association of lnternal Medicine : Poster Session ; PS 1336 : Nephrology ; Spontaneous Renal Rupture in a Hemodialysis Patient

( Jin Kyung Park ),( Sungho Kim ),( Hee Jin Kim ),( Duk Hyun Lee ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Spontaneous rupture and bleeding of the kidney is a rare event and caused mostly by renal cell carcinoma, angiomyolipoma, vascular diseases or acquired cystic renal disease. We report a case of spontaneous renal rupture which occurred in 50-year-old woman with end-stage renal disease. Case: A 50-year-old woman with end-stage renal disease caused by chronic glomerulonephritis visited emergency room with severe left fi ank pain. She was on hemodialysis for 13 years and had no history of trauma. Computed tomography showed considerable hematoma on left pararenal area, atrophy of both kidneys and multiple small renal cysts. Emergent selective renal angiogram was performed and contrast leakage was seen at the upper pole of left kidney. Immediate left renal artery embolization was performed without any complication. The occurrence of acquired cysts in kidneys with primary chronic kidney disease is found in 10-95% of patients, depending on age (more frequent in the elderly), renal function (more frequent in advanced renal failure), and duration of renal failure/dialysis therapy. Clinical complications such as pain, hemorrhage, infection, malignancy, and nephrolithiasis can occur in acquired cystic renal disease. Some studies report that anticoagulant therapy or using heparin during hemodialysis is associated with the risk of cystic rupture and bleeding. The occurrence of spontaneous renal rupture should always be considered on regular hemodialysis patients when unexplained distress or fall of hemoglobin suddenly takes place.

Dopant-Segregated Schottky Source/Drain FinFET With a NiSi FUSI Gate and Reduced Leakage Current

Sung-Jin Choi,Jin-Woo Han,Sungho Kim,Dong-Il Moon,Moongyu Jang,Yang-Kyu Choi IEEE 2010 IEEE transactions on electron devices Vol.57 No.11

<P>Enhanced Dopant-segregated Schottky-barrier (DSSB) FinFETs combined with a fully silicided (FUSI) gate were fabricated via single-step Ni-silicidation. Both workfunction control of the gate and a lowered effective SB-height in the source/drain junctions are simultaneously achieved by the dopant-segregated silicidation process. Moreover, the leakage current was significantly reduced with the aid of deep source/drain implantation. Therefore, it can be expected that a DSSB device with a FUSI gate have several advantages as both a logic and nonvolatile memory device. First, for a logic device, it can provide low parasitic resistance and a tunable threshold voltage. Second, for a nonvolatile memory device, the increased workfunction due to the FUSI gate can enhance the erasing characteristics by suppressing the back tunneling of electrons from the gate side as well as the programming characteristics.</P>

팀장의 리더십 유형이 조직성과에 미치는 영향: 팀웍의 매개효과를 중심으로

진성호 ( Sungho Jin ),송준호 ( Juneho Song ) 아시아문화학술원 2018 인문사회 21 Vol.9 No.5

본 연구의 목적은 리더의 리더십 유형이 조직성과에 미치는 영향을 살펴보고, 팀웍의 매개효과를 확인하는 것이다. 이러한 연구 목적을 달성하기 위해 통계프로그램을 활용하여, 회귀분석을 실시하였다. 연구결과는 다음과 같다. 첫째, 리더십 유형 중 서번트리더십과 수퍼리더십은 조직성과에 정(+)의 영향을 미치는 것으로 나타났다. 둘째, 팀장의 리더십 유형은 팀웍에 정(+)의 영향을 미치는 것으로 나타났다. 셋째, 팀장의 리더십 유형이 조직성과에 미치는 영향에 팀웍이 매개할 것이라는 가설의 분석결과 서번트리더십과 수퍼리더십에 팀윅이 매개하는 것으로 나타났다. 본 연구는 각 리더십 유형과 성과의 관계에서 팀웍의 매개효과를 검증했다는데 의의가 있다. 추후 업무특성과 직종을 고려하여 변수들 간의 인과관계를 추론하고 이에 따른 종단적 연구설계 또한 요구되는 바이다. The purpose of this study is to examine the effects of leadership styles of team leaders on organizational performance and to confirm the mediating effect of teamwork. In order to achieve these objectives, a regression analysis was conducted using a statistical program. The results of the study are as follows: First, it showed positive influence on the organizational performance of servant leadership and super leadership. Second, there was a positive (+) influence of leadership styles of team leader on teamwork. Third, team work mediates the relationship between leadership styles of team leaders and organizational performance. This study is significant in that it examines the mediating effect of team work on the relationship between leadership styles of team leaders and organizational performance. Future research will require a longitudinal research design in which causal relationships between variables are inferred in consideration of job characteristics and occupations.

Proteomic Assessment of the Relevant Factors Affecting Pork Meat Quality Associated with Longissimus dorsi Muscles in Duroc Pigs

Cho, Jin Hyoung,Lee, Ra Ham,Jeon, Young-Joo,Park, Seon-Min,Shin, Jae-Cheon,Kim, Seok-Ho,Jeong, Jin Young,Kang, Hyun-sung,Choi, Nag-Jin,Seo, Kang Seok,Cho, Young Sik,Kim, MinSeok S.,Ko, Sungho,Seo, Jae Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.11

Meat quality is a complex trait influenced by many factors, including genetics, nutrition, feeding environment, animal handling, and their interactions. To elucidate relevant factors affecting pork quality associated with oxidative stress and muscle development, we analyzed protein expression in high quality longissimus dorsi muscles (HQLD) and low quality longissimus dorsi muscles (LQLD) from Duroc pigs by liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based proteomic analysis. Between HQLD (n = 20) and LQLD (n = 20) Duroc pigs, 24 differentially expressed proteins were identified by LC-MS/MS. A total of 10 and 14 proteins were highly expressed in HQLD and LQLD, respectively. The 24 proteins have putative functions in the following seven categories: catalytic activity (31%), ATPase activity (19%), oxidoreductase activity (13%), cytoskeletal protein binding (13%), actin binding (12%), calcium ion binding (6%), and structural constituent of muscle (6%). Silver-stained image analysis revealed significant differential expression of lactate dehydrogenase A (LDHA) between HQLD and LQLD Duroc pigs. LDHA was subjected to in vitro study of myogenesis under oxidative stress conditions and LDH activity assay to verification its role in oxidative stress. No significant difference of mRNA expression level of LDHA was found between normal and oxidative stress condition. However, LDH activity was significantly higher under oxidative stress condition than at normal condition using in vitro model of myogenesis. The highly expressed LDHA was positively correlated with LQLD. Moreover, LDHA activity increased by oxidative stress was reduced by antioxidant resveratrol. This paper emphasizes the importance of differential expression patterns of proteins and their interaction for the development of meat quality traits. Our proteome data provides valuable information on important factors which might aid in the regulation of muscle development and the improvement of meat quality in longissimus dorsi muscles of Duroc pigs under oxidative stress conditions.