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금속박막의 고상 및 액상 비젖음 공정을 통한 AuNi 이종금속 나노입자의 자기 정렬 및 성분 혼합 제어
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문윤환, 박종근, 오용준
Korean J. Met. Mater.
2024;62(1):51-56. Published online 2023 Dec 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.1.51
Abstract
Immiscible Au-Ni alloy thin films undergo phase separation and dewetting because of thermodynamic and morphological instability at elevated temperatures below the miscibility gap. We report the formation and assembly of bimetallic nanoparticles (BNPs) on topographic Si templates. An ordered array of inverted pyramidal pits were produced via solid-state and liquid-state.....
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딥코팅 방법을 활용한 게이트 산화물 유전체 및 반도체 박막의 제조 및 박막트랜지스터 응용
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김용완, 하영근
Korean J. Met. Mater.
2023;61(8):581-588. Published online 2023 Jul 20
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.581
Abstract
The potential applications of advanced electronic materials in large-area, printable, and flexible electronics have generated significant interest. However, creating high-performance, low-voltage thin-film transistors (TFTs) for these applications remains difficult due to a lack of advanced gate dielectric and semiconductor materials that meet both ease-of-fabrication requirements and high electrical performance. In.....
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리드-온-칩 패키지 기술로 조립된 반도체 디바이스에서 온도변화에 의해 발생되는 Si
3
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4
손상
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이성민, 김연욱
Korean J. Met. Mater.
2023;61(2):76-83. Published online 2023 Jan 27
DOI:
https://doi.org/10.3365/KJMM.2023.61.2.76
Abstract
This article shows how fractures in the Si
3
N
4
layer, which comprises the top layer of semiconductor devices encapsulated utilizing a lead-on-chip (LOC) packaging technique, are influenced by changes in the lead-frame materials and thermal-cycling test conditions. Using thermal-cycling tests, it was found that fractures in the Si 3 N 4.....
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Berkovich 압자와 Cube-corner 및 Conical shape 압자를 이용해서 얻은 Cu(In,Ga)Se
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광흡수층 박막의 탄성계수 및 경도의 불일치에 대한 고찰
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강여진, 박원정, 장마오, 유다영, 이동윤
Korean J. Met. Mater.
2022;60(12):884-891. Published online 2022 Nov 25
DOI:
https://doi.org/10.3365/KJMM.2022.60.12.884
Abstract
In this study, we tried to understand the difference in the mechanical properties (elastic modulus, E & hardness, H) values of CIGS compound semiconductors measured using the Berkovich indenter and the sharper cube corner and conical indenter. Adopted continuous stiffness measurement technique to characterize it along with the indentation depth......
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Korean J. Met. Mater.
2022;60(7):517-522. Published online 2022 Jun 3
DOI:
https://doi.org/10.3365/KJMM.2022.60.7.517
Abstract
Improving solar energy conversion efficiency and reducing energy loss have become critical issues in recent decades. Photoelectrochemical (PEC) water splitting provides an ideal method for solar energy harvesting and is a key factor in decreasing the use of fossil fuels. Thus, it is extremely important to identify cost-effective, highly active,.....
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Web of Science 3
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Korean J. Met. Mater.
2022;60(3):220-226. Published online 2022 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2022.60.3.220
Abstract
Advanced electronic materials have attracted great interest for their potential use in flexible, large-area, and printable electronic applications. However, fabricating high-performance low-voltage thin-film transistors (TFTs) for those applications with these advanced semiconductors is still challenging because of a lack of dielectric materials which satisfy both the required electrical and physical.....
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Korean J. Met. Mater.
2022;60(3):198-205. Published online 2022 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2022.60.3.198
Abstract
In this study, we demonstrate high-performance optical wavelength-selective organic thin-film transistors (TFTs) that incorporate heterogeneous organic semiconductor materials, poly(3-hexylthiophene) (P3HT) and 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene). The electrical characteristics of the fabricated transistors were analyzed in the dark to determine how the P3HT:TIPS-pentacene ratio of the semiconductor affected the performance of the.....
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Web of Science 3
Crossref 3
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Korean J. Met. Mater.
2022;60(1):46-52. Published online 2021 Dec 10
DOI:
https://doi.org/10.3365/KJMM.2022.60.1.46
Abstract
This study evaluated changes in delta-ferrite content depending on the preheating of AISI 316L stainless steel. We also determined the reasons for the variation in delta-ferrite content, which affects corrosion resistance. Changes in delta-ferrite content after preheating was confirmed using a Feritscope, and the microstructure was analyzed using optical microscopy.....
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Web of Science 3
Crossref 3
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수소 분위기에서 Mg와 VCl
3
의 밀링에 의한 Mg의 수소 흡수 방출 특성의 향상
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송명엽, 이성호, 곽영준
Korean J. Met. Mater.
2021;59(10):709-717. Published online 2021 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.10.709
Abstract
VCl
3
(vanadium (III) chloride) was selected as an additive to Mg to increase the hydrogenation and dehydrogenation rates and the hydrogen storage capacity of Mg. Instead of MgH
2
, Mg was used as a starting material since Mg is cheaper than MgH
2
. Samples with a composition of 95 wt% Mg +.....
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Crossref 5
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Korean J. Met. Mater.
2020;58(5):304-318. Published online 2020 Apr 20
DOI:
https://doi.org/10.3365/KJMM.2020.58.5.304
Abstract
This study investigated the removal of the organic dye like methylene blue using porous particles in a batch adsorption process. Porous silica microparticles were synthesized with macropores or meso-macropores and used as adsorbent particles. The hierarchically porous structures with additional mesopores were found to be more effective adsorbent than simple.....
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Web of Science 3
Crossref 3
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알칼리 가스에 의한 SiC 및 Si
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4
의 침식 거동
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김주훈, 김강민, 이지아, 김정일, 한정환
Korean J. Met. Mater.
2020;58(1):17-25. Published online 2019 Dec 12
DOI:
https://doi.org/10.3365/KJMM.2020.58.1.17
Abstract
Studies of effective furnace cooling technology and refractory materials have extended the lifetime of a blast furnace to more than 15 years. On the other hand, the replacement of refractories in the blast furnace results in considerable cost and time loss for stopping the blast furnace operation. Various kinds of.....
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Korean J. Met. Mater.
2019;57(11):732-740. Published online 2019 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.11.732
Abstract
To attain high life standards, it is important to develop high-performance non-toxic gas sensors for public safety, environmental pollutant control, industrial processes, etc. Because reports on single element semiconductor-coated semiconducting metal oxides for sensing applications are rare, we synthesized SnO
2
nanowires and coated them with a 5 nm-thick or 10.....
More
Crossref 5
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실리콘 웨이퍼의 그리비지 다이싱 역학
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이성민, 김연욱
Korean J. Met. Mater.
2019;57(11):689-694. Published online 2019 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.11.689
Abstract
This article details how effectively dicing damage of silicon wafers can be mechanically minimized by appropriate laser-induced groove formation prior to wafer separation. Various laser dicing factors, such as the laser-control power, the scan rate and the scan number of the laser beam, were estimated to determine the optimum groove.....
More
Web of Science 2
Crossref 1
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Korean J. Met. Mater.
2019;57(10):663-672. Published online 2019 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2019.57.10.663
Abstract
The dehydrogenation rates of graphene-added Mg (named Mg-5graphene) were very low at 573 K and 593 K. Ni was added to increase the dehydrogenation rates of graphene-added Mg. Samples (designated as Mg-2.5Ni-2.5graphene) with a composition of 95 wt% Mg + 2.5 wt% Ni + 2.5 wt% graphene were prepared by.....
More
Web of Science 7
Crossref 6
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TiO
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/TiO
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박막층의 두께가 멤리스터 소자의 특성에 미치는 영향
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김한상, 김성진
Korean J. Met. Mater.
2019;57(2):84-90. Published online 2019 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.2.84
Abstract
Memristors have been extensively investigated as the fourth fundamental circuit element. Titanium oxide is a common material used to fabricate memristors. In this paper, we investigated the influence of the thickness of the oxide active layer on the Al/TiO2-x/TiO2/heavily doped electrode memristor architecture. An insulating TiO2 thin-film was deposited using.....
More
Web of Science 4
Crossref 5
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Korean J. Met. Mater.
2018;56(12):878-884. Published online 2018 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.12.878
Abstract
In the present work, we selected a polymer, polyvinylidene fluoride (PVDF), as an additive to improve the hydrogenation and dehydrogenation properties of Mg. 95 wt% Mg + 5 wt% PVDF (designated Mg-5PVDF) samples were prepared via milling in hydrogen atmosphere (reactive milling), and the hydrogenation and dehydrogenation characteristics of the.....
More
Crossref 5
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Korean J. Met. Mater.
2018;56(8):620-627. Published online 2018 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.8.620
Abstract
In our previous work, samples with a composition of 95 wt% Mg + 5 wt% CMC (Carboxymethylcellulose, Sodium Salt, [C
6
H
7
O
2
(OH)
x
(C
2
H
2
O
3
Na)
y
]
n
) (named Mg-5 wt%CMC) were prepared through hydride-forming milling. Mg-5 wt%CMC had a very high hydrogenation rate but a low dehydrogenation rate. Addition of Ni to Mg is known to increase.....
More
Crossref 5
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Korean J. Met. Mater.
2018;56(8):611-619. Published online 2018 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.8.611
Abstract
TaF
5
and VCl
3
were chosen as additives to enhance the hydrogen uptake and release rates of Mg. The total content of the additives was not more than 10 wt% since too high content reduces the fraction of Mg and thus the hydrogen storage capacity of the alloys. Samples with compositions.....
More
Crossref 7
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니켈기 초내열합금의 열화에 따른 미세구조 및 저주기 피로손상도 평가
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허인강, 윤동현, 홍상현, 김진열, 김재훈, 장성호, 배시연
Korean J. Met. Mater.
2018;56(8):561-569. Published online 2018 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.8.561
Abstract
Nickel-based superalloys have excellent resistance to extreme environments such as high temperature and high stress and are used as materials for large gas turbines. In this paper, specimens were taken from a blade that had been used for a long time, and their life span was studied by analysis of microstructure......
More
Crossref 3
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Korean J. Met. Mater.
2018;56(5):392-399. Published online 2018 May 8
DOI:
https://doi.org/10.3365/KJMM.2018.56.5.392
Abstract
The addition of CMC (Carboxymethylcellulose, Sodium Salt) may improve the hydriding and dehydriding properties of Mg since it has a relatively low melting point and the melting of CMC during transformation-involving milling may put the milled samples in good states to absorb and release hydrogen rapidly. Samples with compositions of.....
More
Crossref 6
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전류밀도에 따른 플립칩 Sn-Ag 솔더 범프의 Electromigration 손상기구 분석
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김가희, 손기락, 박규태, 박영배
Korean J. Met. Mater.
2017;55(11):798-805. Published online 2017 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2017.55.11.798
Abstract
The effect of current densities on the electromigration (EM) failure mechanism of flip chip Cu/Ni/Sn-Ag/Cu solder bumps was investigated under stressing conditions at current densities ranging from 5.0~6.9 × 10
3
A/cm
2
at 150 ℃. The EM failure times at 5.0 × 10
3
A/cm
2
were around 11 times longer than at.....
More
Crossref 1
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Fe-Mn-Al-Si-Sb-C 강의 고온산화에 미치는 Mn, Si, Sb 첨가효과
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박순용, 이동복
Korean J. Met. Mater.
2017;55(5):308-314. Published online 2017 May 9
DOI:
https://doi.org/10.3365/KJMM.2017.55.5.308
Abstract
High Mn twinning-induced plasticity (TWIP) steels with compositions of Fe-(18.0-18.17) Mn-1.51Al-(0.48-0.52)Si-(0.61-0.62)C-(0.52-0.54)Cr-(0.22-0.23)Ni-0.03Nb-(0-0.04)Sb (wt%) are oxidized at 650 ℃ and 750 ℃ for < 24 h in air in order to determine the effect of the alloying elements on the oxidation. They are oxidized parabolically to MnO
2
,Mn
2
O
3
,FeO,Fe
2
O
3
, and FeMn
2
O
4
oxides with relatively.....
More
Crossref 1
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Korean J. Met. Mater.
2017;55(3):202-208. Published online 2017 Mar 3
DOI:
https://doi.org/10.3365/KJMM.2017.55.3.202
Abstract
Computational fluid dynamic modeling of a continuous rheo-casting technology was conducted, consistent with the manufacturing of 3
mm
-thin plates made of aluminum alloy A356. The A numerical simulation on of the stabilizing time of the material crystallization was carried out using the ANSYS FLUENT code. Solidification and melting models were.....
More
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새로운 EUV 흡수체 연구：니켈 & 니켈 산화물
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우동곤, 김정환, 김정식, 홍성철, 안진호
Korean J. Met. Mater.
2017;55(3):198-201. Published online 2017 Mar 3
DOI:
https://doi.org/10.3365/KJMM.2017.55.3.198
Abstract
The shadowing effect is one of the most urgent issues yet to be solved in high-volume manufacturing using extreme ultraviolet lithography (EUVL). Many studies have been conducted to mitigate the unexpected results caused by shadowing effects. The simplest way to mitigate the shadowing effect is to reduce the thickness of...
More
Crossref 1
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Korean J. Met. Mater.
2017;55(2):98-109. Published online 2017 Feb 2
DOI:
https://doi.org/10.3365/KJMM.2017.55.2.98
Abstract
The aim of this study is to establish an optimized hot-press sintering condition for aluminum matrix composites (AMCs) by analyzing their sintered microstructure and mechanical properties. The fabricated AMCs in this study consisted of a blend of commercial Ecka Alumix 431 powder, and Al-Si/SiC
p
powder manufactured by gas atomizer (Al-Si/SiC
p
)......
More
Crossref 1
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산화성분위기에서의 탄재 내장 산화철 브리켓의 환원특성
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이기우, 김강민, 권재홍, 손상한, 한정환
Korean J. Met. Mater.
2017;55(1):24-30. Published online 2017 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2017.55.1.24
Abstract
The carbon composite iron oxide briquette (CCB) is considered a potential solution to the upcoming use of low grade iron resources in the ironmaking process. CCB is able to reduce raw material cost by enabling the use of low grade powdered iron ores and coal. Additionally, the fast reduction of.....
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탄재내장 산화철 브리켓의 환원거동에 미치는 염기도 영향
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권재홍, 권의혁, 이기우, 김강민, 이지아, 한정환
Korean J. Met. Mater.
2016;54(11):846-854. Published online 2016 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.11.846
Abstract
The world is gradually running short of high quality iron resources. This forces ironmaking processes to focus on the use of low quality iron ores. Carbon composite iron oxide briquettes (CCB) are one of the alternative choices. CCB enables the utilization of low quality powdered iron ores and coal, and.....
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Crossref 1
Casting/Solidification/Heat Treatment
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다이캐스팅 공정에 사용된 개량형 STD61 열간 금형 표면의 미세조직에 관한 연구
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유하영, 이승준, 강민우, 이석진, 양원존, 정재석, 김병훈, 이영국
Korean J. Met. Mater.
2016;54(9):672-680. Published online 2016 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.9.672
Abstract
The surface microstructure and crack formation of an aluminum die-casting mold were investigated. The mold was made of a modified STD61 steel, and was used for more than 165,000 cycles. The mold surface consisted of four layers; an oxidized layer, a decarburized layer, a network carbide layer and a tempered...
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Corrosion & Surface Treatment
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Korean J. Met. Mater.
2016;54(9):645-651. Published online 2016 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.9.645
Abstract
Pure Mg, Mg-5wt%Ca, and Mg-5wt%Ca-1wt%Zn alloys were cast, and their high-temperature oxidation behavior was investigated to determine the roles of Ca and Zn in oxidation. Ca and Zn additions refined the microstructure by formation of Mg
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Ca and Ca
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6
Zn
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, respectively, at grain boundaries. Ca increased the oxidation resistance by forming a.....
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Crossref 2
Electronic Materials
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다이싱 속도 변화가 두께가 차별화된 반도체 웨이퍼의 칩핑 손상에 미치는 영향
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이성민
Korean J. Met. Mater.
2016;54(8):598-604. Published online 2016 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.8.598
Abstract
This work details how the sawing velocity influences the chipping damage of semiconductor wafers with different thicknesses during wafer separation. The experimental result shows that at a sawing velocity higher than 60000 rpm, in thinner wafers the magnitude of chipping damage more strongly depends on the revolving velocity of the.....
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Crossref 3
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