scholarly journals Scheduling Methodology for MCP(Multi-chip Package) with Layer Sequence Constraint in Semiconductor Package

2017 ◽  
Vol 26 (1) ◽  
pp. 69-75
Author(s):  
Young-Hyun Jeong ◽  
Kang-Hoon Cho ◽  
You-In Choung ◽  
Sang-Chul Park
Keyword(s):  
Layer Sequence ◽  
Sequence Constraint

Surface reconstructions of (001) cleaved GdBa2Cu3O7-δ

1992 ◽  
Vol 50 (1) ◽  
pp. 106-107
Author(s):  
H.W. Zandbergen ◽  
M.R. McCartney
Keyword(s):  
Electron Microscopy ◽  
Copper Oxide ◽  
Grain Boundaries ◽  
Atomic Structure ◽  
Oxygen Deficiency ◽  
Surface Layers ◽  
Layer Sequence ◽  
Surface Reconstructions ◽  
Good Agreement

Very few electron microscopy papers have been published on the atomic structure of the copper oxide based superconductor surfaces. Zandbergen et al. have reported that the surface of YBa2Cu3O7-δ was such that the terminating layer sequence is bulk-Y-CuO2-BaO-CuO-BaO, whereas the interruption at the grain boundaries is bulk-Y-CuO2-BaO-CuO. Bursill et al. reported that HREM images of the termination at the surface are in good agreement with calculated images with the same layer sequence as observed by Zandbergen et al. but with some oxygen deficiency in the two surface layers. In both studies only one or a few surfaces were studied.

scholarly journals Preparation and Properties of Layered SiC-Graphene Composites for EDM

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2916
Author(s):  
Ondrej Hanzel ◽  
Zoltán Lenčéš ◽  
Peter Tatarko ◽  
Richard Sedlák ◽  
Ivo Dlouhý ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Surface Layer ◽  
Positive Influence ◽  
Layered Composite ◽  
Layered Composites ◽  
Good Adhesion ◽  
Electric Discharge Machining ◽  
Layer Sequence ◽  
The Individual ◽  
Scratch Tests

Three and five-layered silicon carbide-based composites containing 0, 5, and 15 wt.% of graphene nanoplatelets (GNPs) were prepared with the aim to obtain a sufficiently high electrical conductivity in the surface layer suitable for electric discharge machining (EDM). The layer sequence in the asymmetric three-layered composites was SiC/SiC-5GNPs/SiC-15GNPs, while in the symmetric five-layered composite, the order of layers was SiC-15GNPs/SiC-5GNPs/SiC/SiC-5GNPs/SiC-15GNPs. The layered samples were prepared by rapid hot-pressing (RHP) applying various pressures, and it was shown that for the preparation of dense 3- or 5-layered SiC/GNPs composites, at least 30 MPa of the applied load was required during sintering. The electrical conductivity of 3-layered and 5-layered composites increased significantly with increasing sintering pressure when measured on the SiC surface layer containing 15 wt.% of GNPs. The increasing GNPs content had a positive influence on the electrical conductivity of individual layers, while their instrumented hardness and elastic modulus decreased. The scratch tests confirmed that the materials consisted of well-defined layers with straight interfaces without any delamination, which suggests good adhesion between the individual layers.

Research on Span of Manufacturing Task with Time-Sequence Constraint for Manufacturing Collaborative Alliances

2012 ◽  
Vol 201-202 ◽  
pp. 975-978
Author(s):  
Hong Fei Wang
Keyword(s):  
Quantitative Methods ◽  
Time Sequence ◽  
Influential Factors ◽  
Qualitative And Quantitative Methods ◽  
Sequence Constraint ◽  
Manufacturing Resources ◽  
Production Period ◽  
The Relationship ◽  
Task Span ◽  
Collaborative Alliances

For the manufacturing task of manufacturing collaborative alliances, the relationship between manufacturing task programming and manufacturing resources deployment is analyzed and the model for the span of manufacturing task with time sequence constraint is constructed. The problem of span programming of manufacturing task with time sequence constraint is analyzed by integrating qualitative and quantitative methods from production period for the manufacturing task. The mathematical formulations of influential factors and task span are constructed, and the optimal values of task span are obtained. By analyzing the results of quasi-quantitative study, some meaningful results that benefit to programming for collaborative manufacturing task are achieved.

Optimum layer sequence analysis for composite blade using ACP-FSI model

2021 ◽  
Vol 7 (4) ◽  
pp. 354
Author(s):  
Mustafa Serdar Genç ◽  
Ramazan Özkan
Keyword(s):  
Sequence Analysis ◽  
Layer Sequence ◽  
Composite Blade

The Interface Reaction between Titanium and Iron-Nickel alloys

2018 ◽  
Vol 37 (7) ◽  
pp. 683-691
Author(s):  
Bartek Wierzba ◽  
Wojciech J. Nowak ◽  
Daria Serafin
Keyword(s):  
Solid State ◽  
Chemical Interaction ◽  
Pure Titanium ◽  
Interface Reaction ◽  
Reaction Diffusion ◽  
Diffusion Path ◽  
Chemical Conversion ◽  
Layer Sequence ◽  
Iron Nickel ◽  
Fast Dissolution

AbstractThe reaction zones between pure titanium and iron-nickel and pure nickel at 1173 K have been characterized. Two alloys with different initial composition were analyzed. When Ni80Fe20 is used the layer sequence at the reaction interface is: Ni80Fe20 → Ni3Ti → NiTi → NiTi2 →Ti, while for Ni48Fe52 the sequence is: Ni48Fe52 → Ni3Ti → TiFe2 → TiFe → NiTi2 → Ti. The difference is in formation of NiTi, TiFe2 and TiFe phases. The reaction zone remains very thin independently of time due to the fast dissolution rate of Ti in the alloy. The two different elementary chemical interaction processes have been identified in this article, namely the growth of the reaction layers by solid state diffusion and chemical conversion of the compounds by reaction-diffusion in the solid state. The mathematical description combining these processes is presented for description of the diffusion path generated during diffusion process.

YBa2Cu3O7-y−coated conductors with high engineering current density

2000 ◽  
Vol 15 (12) ◽  
pp. 2647-2652 ◽  
Author(s):  
M. Paranthaman ◽  
C. Park ◽  
X. Cui ◽  
A. Goyal ◽  
D. F. Lee ◽  
...  
Keyword(s):  
Pulsed Laser Deposition ◽  
Critical Current ◽  
Current Density ◽  
Ybco Film ◽  
Pulsed Laser ◽  
Coated Conductors ◽  
Laser Deposition ◽  
Ex Situ ◽  
Layer Sequence ◽  
Ybco Coated Conductors

Short segments of YBa2Cu3O7-y (YBCO) coated conductors were fabricated on rolling-assisted biaxially textured substrates (RABiTS) with a layer sequence of CeO2/YSZ/Ni using an ex situ BaF2 precursor process. Pulsed laser deposition (PLD) was used to deposit both YSZ and CeO2 layers. The YBCO films were grown using e-beam coevaporated Y–BaF2–Cu precursors followed by postannealing. An overall engineering current density, JE, of 28,000 A/cm2 and critical current, Ic, of 147 A/cm width at 77 K were achieved for a 1.6-μm-thick YBCO film. This result demonstrates the possibility of using both the ex situ BaF2 precursor approach and the RABiTS process for producing long lengths of high-JE coated conductors.

Investigation of Pt Bottom Electrodes for "In-Situ" Deposited Pb(Zr,Ti)O3 (PZT) thin Films

1991 ◽  
Vol 243 ◽  
Author(s):  
Rainer Bruchhaus ◽  
Dana Pitzer ◽  
Oliver Eibl ◽  
Uwe Scheithauer ◽  
Wolfgang Hoesler
Keyword(s):  
Elevated Temperatures ◽  
Diffusion Processes ◽  
Rutherford Backscattering Spectrometry ◽  
Layer Sequence ◽  
Si Substrates ◽  
Transmission Electron ◽  
In Situ Deposition ◽  
Electron Spectrometry ◽  
Heating Up

AbstractThe deposition of the bottom electrode plays a key role in the fabrication of ferroelectric capacitors. Processing at elevated temperatures of up to 800°C can give rise to diffusion processes and thereof formation of harmful dielectric layers.In this paper we used Rutherford backscattering spectrometry (RBS), Auger electron spectrometry (AES) and transmission electron microscopy (TEM) to study Pt/Ti/SiO2/Si substrates with various thicknesses of the Ti and Pt layers. During heating up to about 450°C in vacuum the initial layer sequence remains unchanged. However, drastic changes occur when the electrodes are exposed to Ar/O2 atmosphere during heat treatment. Oxidation induced diffusion of Ti into Pt and oxidation of Ti were observed. A Pt electrode with a 100 nm thick Ti adhesion layer proved to be suitable for the "in-situ" deposition of PZT films.

Low Driving Voltage of Organic Light-Emitting Diodes Using p-Doping Starburst Amine as Hole Transporter

2000 ◽  
Vol 660 ◽  
Author(s):  
Xiang Zhou ◽  
Andreas Nollau ◽  
Jan Blochwitz ◽  
Martin Pfeiffer ◽  
Torsten Fritz ◽  
...  
Keyword(s):  
Thin Films ◽  
Hole Concentration ◽  
Organic Light Emitting Diodes ◽  
Driving Voltage ◽  
Temperature Dependent ◽  
Light Emitting ◽  
Layer Sequence ◽  
Undoped Material ◽  
High Bulk

ABSTRACTWe investigate the electrical properties and the OLED application of controlledly doped amorphous hole transporters. Thin films of starburst amine, 4,4',4“-tris(N,N-diphenyl- amino) triphenylamine (TDATA), doped by a fully fluorinated form of tetracyano- quinodimethane (F4-TCNQ), are characterized in situ by temperature dependent conductivity and Seebeck measurements. The conductivity and hole concentration increase with dopant concentration and are many orders of magnitude higher than those of undoped material. OLED devices with the layer sequence ITO/TDATA(200 nm)/Alq3(65 nm)/LiF(1 nm)/Al were fabricated. The use of p-doped TDATA thin films with high bulk conductivity and hole concentration reduces the resistance of the devices and leads to a thinner space charge layer which facilitates injection of holes from the ITO anode.

scholarly journals Organic solar cells with inverted layer sequence incorporating optical spacers - simulation and experiment.

2006 ◽  
Author(s):  
Birger Zimmermann ◽  
Markus Glatthaar ◽  
Michael Niggemann ◽  
Moritz Kilian Riede ◽  
Tobias Ziegler ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Layer Sequence ◽  
Simulation And Experiment
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