Browsing by Issue Date, starting with "2018-04-12"

Now showing 1 - 20 of 10968

A new failure mechanism of electromigration by surface diffusion of Sn on Ni and Cu metallization in microbumps
(2018-04-12)
Chang, Yuan-Wei
;
Hu, Chia-chia
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Peng, Hsin-Ying
;
Liang, Yu-Chun
;
Chen, Chih
Microbumps in three-dimensional integrated circuit now becomes essential technology to reach higher packaging density. However, the small volume of microbumps dramatically changes the characteristics from the flip-chip (FC) solder joints. For a 20 mu m diameter microbump, the cross-section area and the volume are only 1/25 and 1/125 of a 100 mu m diameter FC joint. The small area significantly enlarges the current density although the current crowding effect was reduced at the same time. The small volume of solder can be fully transformed into the intermetallic compounds (IMCs) very easily, and the IMCs are usually stronger under electromigration (EM). These result in the thoroughly change of the EM failure mechanism in microbumps. In this study, microbumps with two different diameter and flip-chip joints were EM tested. A new failure mechanism was found obviously in microbumps, which is the surface diffusion of Sn. Under EM testing, Sn atoms tend to migrate along the surface to the circumference of Ni and Cu metallization to form Ni3Sn4 and Cu3Sn IMCs respectively. When the Sn diffuses away, necking or serious void formation occurs in the solder, which weakens the electrical and mechanical properties of the microbumps. Theoretic calculation indicates that this failure mode will become even significantly for the microbumps with smaller dimensions than the 18 mu m microbumps.
Magnetic properties of type-I and type-II Weyl semimetals in the superconducting state
(2018-04-12)
Rosenstein, Baruch
;
Shapiro, B. Ya.
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Li, Dingping
;
Shapiro, I.
;
電子物理學系
Superconductivity was observed in certain range of pressure and chemical composition in Weyl semimetals of both type I and type II (when the Dirac cone tilt parameter kappa > 1). Magnetic properties of these superconductors are studied on the basis of microscopic phonon-mediated pairing model. The Ginzburg-Landau effective theory for the order parameter is derived using the Gorkov approach and used to determine anisotropic coherence length, the penetration depth determining the Abrikosov parameter for a layered material and applied to recent extensive experiments on MoTe2. It is found that superconductivity is of second kind near the topological transition at kappa = 1. For a larger tilt parameter, superconductivity becomes first kind. For kappa < 1, the Abrikosov parameter also tends to be reduced, often crossing over to the first kind kappa For the superconductors of the second kind, the dependence of critical fields H-c2 and H-c1 on the tilt parameter. (governed by pressure) is compared with the experiments. Strength of thermal fluctuations is estimated and it is found that they are strong enough to cause Abrikosov vortex lattice melting near H-c2. The melting line is calculated and is consistent with experiments provided the fluctuations are three dimensional in the type-I phase (large pressure) and two dimensional in the type-II phase (small pressure).
METHOD FOR ADVANCING NON-MAGNETICALLY RESPONSIVE FUNCTIONAL AGENT
(2018-04-12)
Ching-Yao CHEN
;
Yan-Hom LI
;
Ren-Chiuan SHIU
A method for advancing a non-magnetically responsive functional agent includes steps (a) and (b). In step (a), a magnetically responsive agent construct at a target site is subjected to a homogeneous static magnetic field such that magnetically responsive micro particles are aligned to obtain a magnetic chain while the non-magnetically responsive functional agent is separated and discrete from the magnetic chain. In step (b), the magnetic chain is subjected to a rotational magnetic field to cause repeating breaking up and reformation of the magnetic chain such that the non-magnetically responsive functional agent is displaced to a predetermined position.
Selective extraction of n-butylidenephthalide from Angelica sinensis (Danggui) by using functionalized iron oxide magnetic nanoparticles as trapping probes
(2018-04-14)
Wu, Ching-Yi
;
Wu, Min-Li
;
Chen, Yu-Chie
;
應用化學系
;
Department of Applied Chemistry
n-Butylidenephthalide (BP) is an active compound in Angelica sinensis (Danggui) and a potential anti-cancer drug. Thus, purification of BP from complex herb extract samples is important. In this study, we develop a facile method for selective purification of BP from complex samples by using iron oxide magnetic nanoparticles (Fe3O4 MNPs) immobilized with riboflavin-50-phosphate (RFMP) as affinity probes. RFMP is a polyaromatic compound that contains a phosphate, which can readily chelate with the metal center on the surface of Fe3O4 MNPs. The aromatic rings on RFMP can interact with BP (K-d = similar to 6.73 x 10(-5) M) through pi-pi stacking. Thus, Fe3O4@RFMP MNPs are fabricated by simply mixing Fe3O4 MNPs with RFMP under microwave heating (power: 540 W) for 3 min. The as-prepared Fe3O4@RFMP MNPs can be used as affinity probes to selectively concentrate BP from an acidic solution; BP is then released from the MNPs by using acetonitrile. The recovery of BP from the Fe3O4@RFMP MNP-BP conjugates is estimated to be similar to 100%. This study also demonstrates the feasibility of using the proposed approach to selectively extract BP from complex A. sinensis extract samples.
二手玩具世界──玩聚窩
(2018-04-15)
楊巧柔
;
Department of Communication and Technology
;
傳播與科技學系
【二手玩具物流】專題

玩聚窩放置的玩具全數為二手玩具，經過整理及分類，開放一般民眾使用，讓親子在假日多一個好去處。
找尋文化和環保的平衡　邵璦婷
(2018-04-15)
吳佩芸
;
Department of Communication and Technology
;
傳播與科技學系
【天燈施放　傳統文化與環保的角力】專題

邵璦婷與團隊成員一同研發環保天燈，在文化、環保與經濟之間找到一條新出路。
新興的傳播力量：資訊圖表正夯
(2018-04-15)
郭庭芸
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Department of Communication and Technology
;
傳播與科技學系
【不只是美　看見設計的力量】專題

I have an info, I have a graphic, uh! Infographic! 近年來，台灣對於資訊圖表設計的關注度逐漸升高，本篇將以資訊圖表的格式介紹資訊圖表相關的小知識。
持續發展的潛力股　生酮飲食
(2018-04-15)
楊佩臻
;
Department of Communication and Technology
;
傳播與科技學系
【飲食與健康】專題

生酮飲食是什麼？其中又有什麼利與弊？讓我們一起來了解吧！
Comparison of ZnO and Ti-doped ZnO sensing membrane applied in electrolyte-insulator-semiconductor structure
(2018-04-15)
Lee, Ming Ling
;
Wang, Jer Chyi
;
Kao, Chyuan Haur
;
Chen, Hsiang
;
Lin, Chan Yu
In this paper, we demonstrate electrolyte-insulator-semiconductor devices for biochemical sensing applications prepared from ZnO and Ti-doped ZnO sensing membranes deposited on Si substrates by radio frequency sputtering. The structural, morphological, and compositional features of these deposited films with multitemperature annealing were studied using X-ray diffraction, atomic force microscopy, and X-ray photoelectron spectroscopy, respectively. Sensitivity, linearity, hysteresis, and drift rate were measured to determine the sensing and reliability performance of all fabricated devices. Compared to the ZnO electrolyte-insulator-semiconductor (EIS), the Ti-doped ZnO EIS sensor annealed at 700 degrees C exhibits a higher sensitivity of 57.56 mV/pH, lower hysteresis of 2.79 mV, and lower drift rate of 0.29 mV/h. For Ti-doped ZnO, sensitivities of 3.62 mV/mM and 6.42 mV/mM were obtained for urea and glucose sensing, respectively. The improvements are owing to Ti-doping, which produces a rougher sensing surface, a well-crystallized grain structure, and thinner silicate and SiO2 at the silicon-oxide interface.
A-Team　負數開始累積人氣
(2018-04-15)
巫尹文
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Department of Communication and Technology
;
傳播與科技學系
【台灣偶像團體的困境與未來】專題

經歷抄襲風波的台灣新男團A-Team，將批評化為前進動力，努力充實實力，並於今年二月發行了首張EP「44釐米」。
箏開新視野　視障藝術家周進發
(2018-04-15)
簡嘉瑩
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Department of Communication and Technology
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傳播與科技學系
【他們的故事　身心障礙者】專題

聾盲藝術家周進發，在黑暗世界中，用古箏譜出屬於他的美麗色彩。
注音符號發展史
(2018-04-15)
謝宛蓁
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Department of Communication and Technology
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傳播與科技學系
【注音符號：中文巴別塔】專題

在ㄅㄆㄇ爭議中，支持注音符號的網友以《施氏食獅史》一文嘲諷使用羅馬拼音的後果，此舉反映了對注音符號和拼音的嚴重誤解。此篇將帶您了解注音符號與漢語拼音的誕生歷史，一同探悉其背後的軌跡。
認識僑生　那些他們常被問的事
(2018-04-15)
關子茵
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Department of Communication and Technology
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傳播與科技學系
【僑生面面觀】專題

大家對僑生總是有很多好奇和疑問，就用這張圖表為你們解惑吧。
總編輯的話
(2018-04-15)
王貞懿
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Department of Communication and Technology
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傳播與科技學系
本期為喀報285期，稿件共計19篇。本期頭題為《募不募？動畫募資比一比》，以圖表方式呈現出台灣動畫的募資特性。
Optical properties of algogenic organic matter within the growth period of Chlorella sp and predicting their disinfection by-product formation
(2018-04-15)
Hua, Lap-Cuong
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Lin, Jr-Lin
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Syue, Ming-Yang
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Huang, Chihpin
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Chen, Pei-Chung
Algogenic organic matter (AOM) in eutrophic waters is a well-known precursor to disinfection by-product (DBP) formation in drinking water. This purpose of this study is (i) to characterize the optical properties of AOM origins, including intra- (IOM) and extra-cellular organic matter (EOM), derived from Chlorella sp. growth as precursors to two major carbonaceous DBPs (C-DBPs), trihalomethanes (THMs) and haloacetic acids (HAAs) and (ii) to correlate these optical properties with THM and HAA formation potential (FP) in order to predict DBP formation. The results show that both EOM and IOM had low UV254 and UV280 absorbance during their entire growth phase. While IOM chiefly comprised of aromatic proteins and soluble microbial products-like substances (80% of average fluorescent intensity-AFI), EOM spectra were rich in humic- and fulvic-like substances (60% AFI). However, its chemical nature likely differed from terrestrial humics. In DBPFP tests, IOM was a higher-yielding precursor of THMs and HAAs compared to EOM, regardless its growth status. Consequently, C-DBPFP of IOM was always higher than EOM during four growth phases. Results from DBP tests also showed insignificant variation of EOM-derived THMFP and HAAFP during the algal growth phase, while the algal growth status strongly influenced the yields of IOM-derived THMFP and HAAFP. From correlation analysis, our results showed no correlation between UV absorbance with THMFP and HAAFP. Conversely, the regional AFI showed a good correlation with HAAFP and C-DBPFP. Predicting models based on AFI for the formation of HAAs and C-DBPs consequently yielded great predictability for laboratory AOM-containing water samples, with a coefficient of determination R-2 = 0.879, p < 0.01 and R-2 = 0.846, p < 0.01. This study indicates a promising application of fluorescent spectra for predicting DBPs derived from algae-rich water sources. (c) 2017 Elsevier B.V. All rights reserved.
為人為己？　女性化妝之爭
(2018-04-15)
簡梵軒
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Department of Communication and Technology
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傳播與科技學系
【化妝、性別與社會】專題

女性與化妝自古以來便難以切割，然而在時代演變下，化妝對女性的意義和功能逐漸改變，但究竟誰擁有主導權？
承先啟後　Mr.block區塊先生
(2018-04-15)
戴葦婷
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Department of Communication and Technology
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傳播與科技學系
【區塊鏈：一場新數位革命】專題

傳播區塊鏈知識的新創教育者——Mr.block區塊先生。
客家音樂　傳統與現代並行
(2018-04-15)
凃易暄
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Department of Communication and Technology
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傳播與科技學系
【客家音樂　從傳統到現代】專題

帶你一窺客家傳統音樂的流變，與現今流行音樂的發展。
用數字帶你看泛自閉症障礙
(2018-04-15)
賴昀君
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Department of Communication and Technology
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傳播與科技學系
【自閉症，你需要更靠近它一點】專題

用各項相關數據來帶你掌握泛自閉症障礙與它在台灣的現況。
全球韓流效應　粉絲知多少
(2018-04-15)
馮瑜庭
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Department of Communication and Technology
;
傳播與科技學系
【韓流粉絲新現象】專題

韓國流行文化多年來不僅在韓國本土向下扎根，風靡全球的盛況更是持續成長。本篇將用圖表帶您了解韓流粉絲的現象。