Browsing by Issue Date, starting with "2005-09-11"

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垂直入射型折射率測量裝置
(2005-09-11)
蘇德欽
;
許正治
;
陳坤煌
本發明係揭露一種垂直入射型折射率測量裝置，其係將由左旋偏光及右旋偏光間有頻差的旋光外差光源所發出來的光線，經一偏光保持光纖將光入射於一測試模組。一檢偏板抽出經高反射面鏡及待測物垂直反射而回光束中相同的偏極光成份，並使之干涉；其干涉信號由光偵測器測得。再利用一相位計分析光偵測器所得的訊號可得到經由待測物所引進的相位差，此相位差與待測物的折射率有關；最後再根據瓊斯計算法(Jones calculus)與斯涅耳方程式所推演出的公式以及由外差干涉術所測出的相位差變化，便可計算出待測物的折射率。由於本發明無須使用造成全反射的稜鏡，所以對於待測物的量測範圍將不會受探頭折射率的限制，故量測範圍較為廣泛並以垂直入射待測物，所以裝置及操作上都更為簡單。
太陽能光主動元件
(2005-09-11)
祁甡
;
陳南光
;
施宙聰
本發明係提供一種太陽能光主動元件，係利用太陽能矽晶片板上之全像天線光柵來選擇特定繞射波長並以近似垂直耦合的方式將泵浦波長耦合並匯聚藉此激發光增益介質，使之產生光放大或雷射的效果，其係適用於地面之無線光通訊以及衛星光通訊，無需很大的體積，對於物體的表面形狀更有彈性(即使大樓的頂樓或外牆玻璃表面均可製作該全像天線光柵)，若在衛星上則可依附於太陽能電池板上，並產生極高的放大增益，不但可以減少衛星光通訊對電力的依賴，更可滿足特殊衛星快速傳輸大量資料的目的。
Method for detection of manufacture defects
(2005-09-13)
Tseng
;
Shian-Shyong
;
Chen
;
Wei-Chou
;
Wang
A novel method for detection of manufacture defects is disclosed. The invented method is designed to discover root cause machine sets that cause defects in product manufactured in a process wherein a plurality of machines is involved. The method includes obtaining manufacture data that relate to manufacture of products in the manufacture process, generating a candidate list of machine set by analyzing the manufacture data wherein the machine set includes machines relative to defects in the products, and identifying root cause machine sets from the list of machine set wherein the root cause machine sets include machines highly related to the defects.
Method for fabricating nanometer gate in semiconductor device using thermally reflowed resist technology
(2005-09-13)
Chang
;
Edward Y.
;
Lee
;
Huang-Ming
The invention relates to a method for fabricating nanometer gate semiconductor device using thermally reflowed photoresist technology, comprising steps of (i) spin-coating two layers of photoresists on a substrate, where a bottom layer of photoresist is a polymeric photoresist having a lower sensitivity and a higher resolution, and a top layer of photoresist, is another polymeric photoresist having a higher sensitivity and a lower resolution, with respect to the electron beam; (ii) heating the photoresists for curing by way of using a hotplate; (iii) using photolithography in an electron beam direct writing manner to expose a pattern on the photoresists for forming a gate; (iv) using a developer and an etchant for developing and etching to form a recess on the gate; (v) plating a metallic layer on the recess of the gate using an electron gun evaporation technique; and (vi) removing the photoresists to obtain the gate, characterized in that after the etching of the recess of the gate, the photoresists are reflowed by using a hot plate heating manner within a predetermined period of time and temperature, such that the recess of the gate is formed with a nanometer-sized width.
Efficient periodically poled stoichiometric lithium tantalate optical parametric oscillator for the visible to near-infrared region
(2005-09-15)
Tu, SY
;
Kung, AH
;
Gao, ZD
;
Zhu, SN
;
光電工程學系
A compact, efficient optical parametric oscillator (OPO) for the visible to near-infrared region based on periodically poled stoichiometric lithium tantalate pumped by a frequency-doubled multikilohertz Q-switched Nd:YAG laser is demonstrated. Up to 61% photon conversion with a 71% slope efficiency for photon conversion from 532 nm to the signal radiation was measured. We observed that the efficient conversion diminished the potential for photorefractive damage induced by the 532 am radiation in the crystal and made sustained operation of the OPO device possible. (c) 2005 Optical Society of America.
管管作品三首
(2005-09-15)
管管
管管作品三首
(2005-09-15)
管管
管管作品三首
(2005-09-15)
管管
Nucleation and growth behavior of well-aligned ZnO nanorods on organic substrates in aqueous solutions
(2005-09-15)
Lin, CC
;
Chen, SY
;
Cheng, SY
;
材料科學與工程學系
;
Department of Materials Science and Engineering
A low-temperature synthetic route was used to prepare well-aligned arrays of oriented ZnO nanorods on organic substrates coated with polystyrene beads (PS) in an aqueous solution. The corresponding growth behavior and photoluminescence properties of ZnO nanorods were analyzed. It was found that the ZnO nanorods are initially nucleated from the ZnO monolayer under the concave regions of the PS layers and preferentially grown along [0 0 0 1] direction. High-resolution transmission electron microscopy (HRTEM) observation reveals that the ZnO nanorods tend to coalesce together with other adjacent nanorods to form a larger ZnO crystal in the later growth stage. The room-temperature photoluminescence spectra demonstrate that a stronger ultraviolet (UV) emission with a broad yellow emission around 575 nm was observed for the ZnO nanorods grown on the organic substrates and the relative intensity ratio of ultraviolet emission to yellow emission depends on the growth periods of time. This simple approach demonstrates great potential for optoelectronic devices because it can produce large-scale highly well-aligned ZnO nanorods on the flexible organic substrates at lower temperatures. (c) 2005 Elsevier B.V. All rights reserved.
Fe3O4/TiO2 core/shell nanoparticles as affinity probes for the analysis of phosphopeptides using TiO2 surface-assisted laser desorption/ionization mass spectrometry
(2005-09-15)
Chen, CT
;
Chen, YC
;
交大名義發表
;
National Chiao Tung University
Columns packed with microsized titanium dioxide particles have been used effectively as precolumns for enriching phosphopeptides from complex mixtures. Nano-sized titanium dioxide particles have a higher specific surface area and, hence, potentially higher trapping capacities toward phosphopeptides than do microsized particles. Thus, in this study, we employed TiO2-coated magnetic (Fe3O4/TiO2 core/shell) nanoparticles to selectively concentrate phosphopeptides from protein digest products. Because of their magnetic properties, the Fe3O4/TiO2 core/shell nanoparticles that are conjugated to the target peptides can be isolated readily from the sample solutions by employing a magnetic field. In this paper, we also demonstrate that the Fe3O4/TiO2 core/ shell nanoparticles behave as an effective SALDI matrix: our upper detectable mass limit was similar to 24 000 Da, whereas the detection limit for peptides was in the low-femtomole range. That is to say, the target analytes trapped by the Fe3O4/TiO2 nanoparticles can be identified by introducing the particles directly into the mass spectrometer for TiO2-SALDI-MS analysis without the need for any further treatment. For example, elution steps are not necessary when using this approach. In addition, the trapping selectivity of these Fe3O4/TiO2 nanoparticles toward phosphopeptides was quite good. These properties combine to result in the low detection limits. The lowest detectable concentration of phosphopeptides that we analyzed using this approach was 500 pM for a 100-mu L tryptic digest solution of beta-casein; this level is much lower than that which can be obtained using any other currently available method.
Method for inter-cluster communication that employs register permutation
(2005-09-15)
Jen, Chein-Wei
;
Lin, Tay-Jyi
;
Lee, Chen-Chia
;
Chang, Chin-Chi
;
Liu, Chih-Wei
The present invention is a method for inter-cluster communication that employs register permutation by dynamically mapping the registers to the functional units. Because only the mapping between registers and functional units is changed and no actual data movement occurs, the present invention greatly diminishes the power consumption. Owing to the inter-cluster communication mechanism, a centralized register file can be replaced with small register sub-blocks, where the silicon area is greatly reduced, and the access time and the power consumption are also diminished.
管管作品三首
(2005-09-15)
管管
Direct generation of a 10 GHz 816 fs pulse train from an erbium-fiber soliton laser with asynchronous phase modulation
(2005-09-15)
Hsiang, WW
;
Lin, CY
;
Tien, MF
;
Lai, YC
;
光電工程學系
By employing the technique of asynchronous mode locking, we have successfully demonstrated direct generation of stable 10 GHz 816 fs pulse trains with a supermode-suppression ratio > 70 dB from a hybrid mode-locked Er-fiber laser. When the modulation frequency deviates from the cavity harmonic frequency by 15-40 kHz, stable femtosecond soliton pulses are formed. Our results demonstrate that asynchronous mode locking can act as an effective mechanism for achieving a shorter pulse width and for stabilizing high-repetition-rate pulse trains in soliton fiber lasers. (c) 2005 Optical Society of America.
管管作品三首
(2005-09-15)
管管
Efficient mode coupling technique between photonic crystal heterostructure waveguide and silica waveguides
(2005-09-15)
Chau, YF
;
Yang, TJ
;
Gu, BY
;
Lee, WD
;
電子物理學系
We report an efficient mode coupling technique between silica waveguides (SWGs) and a planar photonic crystal heterostructure waveguide (PPCHWG) composed of two semi-infinite two-dimensional photonic crystals (PCs) with different filling fractions. By calculating the transmittance at output end of SWG, we find that the designed structures possess the merits of high coupling efficiency and relaxing fabricating tolerance. The maximal transmittance exceeds 90% at a wavelength near 1.65 mu m. The high transmission efficiency of PPCHWGs can be achieved without introducing any defect structures for optimal mode matching. Besides, the width of PPCHWGs can be flexibly adjusted via changing the separation of two component PCs in PC heterostructures. (c) 2005 Elsevier B.V. All rights reserved.
管管作品三首
(2005-09-15)
管管
管管作品三首
(2005-09-15)
管管
Nanoprobe-based affinity mass spectrometry for selected protein profiling in human plasma
(2005-09-15)
Chou, PH
;
Chen, SH
;
Liao, HK
;
Lin, PC
;
Her, GR
In recent decades, magnetic nanoparticles have emerged as a promising new platform in biomedical applications, particularly bioseparations. We have developed an immunoassay using antibody-conjugated magnetic nanoparticles as an efficient affinity probe to simultaneously preconcentrate and isolate targeted antigens from biological media. We combined this probe with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI MS) to profile proteins in diluted human plasma. The nanoparticles were designed to detect several disease-associated proteins and could be used directly in MALDI MS without an elution step, thereby facilitating multiple antigen screening and the characterization of antigen variants. Plasma antigens bound rapidly (similar to 10 min) to the antibody-conjugated nanoparticles, allowing the assay to be performed within 20 min. With sensitivity of detection in the femtomole range, the nanoscale immunoassay is superior to assays using microscale particles. We applied our method to comparative protein profiling of patients with gastric cancer and healthy individuals and found differential protein expression levels associated with the disease as well as individuals. Given the flexibility of manipulating functional groups on the nanoprobes, their low cost, robustness, and simplicity of the assay, our approach shows promise for targeted proteome profiling in clinical settings.
Method and apparatus for interframe wavelet video coding
(2005-09-15)
Tsai, Sam S.
;
Hang, Hsueh-Ming
;
Tsai, Chia-Yang
;
Chiang, Tihao
The present invention provides a method and apparatus for interframe wavelet video coding which comprises Motion Compensated Temporal Filtering and Discrete Wavelet Transform Coding to obtain: 1. compressed quantification error and scalability on temporal analysis and spatial analysis, and 2. scalability on Motion Information (MI) data so that the performance of wavelet video coding on low bitrate can be improved. A method for partitioned coding on MI is proposed: 1. to partitioned coding a motion vector according to the spatial block, the temporal frame, or the numeric precision; 2. to partition motion vectors to a plurality of layers, and, when the video bitstream changes, only the required MI is put into the final bitstream. Accordingly, the performance of wavelet video compression on low bitrate is greatly improved while the compression rate on high bitrate is only a little lower.
Welding flux for use in arc-welding of stainless steels, method of welding stainless steel members using the welding flux
(2005-09-15)
Chou, Chang-Pin
;
Huang, Her-Yueh
;
Shyu, Sheang-Wen
;
Tseng, Kueng-Hueng
;
Yang, Tsung-Chieh
A welding flux for use in welding stainless steel parts to increase welding penetration, consisting essentially a base material obtained from manganese peroxide (MnO2), and an activator selected from a material group that includes zinc oxide (ZnO), silicon dioxide (SiO2), chromium oxide (CrO2), titanium dioxide (TiO2), molybdenum dioxide (MoO2), and iron oxide (Fe2O2).