scholarly journals Improving the design of high speed mechanisms through multi-level kinematic synthesis, dynamic optimization and velocity profiling

2017 ◽  
Vol 118 ◽  
pp. 100-114 ◽  
Author(s):  
Robert M.C. Rayner ◽  
M. Necip Sahinkaya ◽  
Ben Hicks
Keyword(s):  
Dynamic Optimization ◽  
High Speed ◽  
Kinematic Synthesis ◽  
Multi Level

Aluminum Reflow Sputtering

MRS Bulletin ◽  
1995 ◽  
Vol 20 (11) ◽  
pp. 53-56 ◽  
Author(s):  
Kuniko Kikuta
Keyword(s):  
Integrated Circuit ◽  
High Speed ◽  
Lower Cost ◽  
High Reliability ◽  
Device Fabrication ◽  
Damascene Process ◽  
Aspect Ratios ◽  
Multi Level ◽  
Poor Adhesion ◽  
Lower Resistivity

The scaling of integrated-circuit device dimensions in the horizontal direction has caused an increase in aspect ratios of contact holes and vias without a corresponding scaledown in vertical dimensions. Conventional sputtering has become unreliable for handling higher aspect-ratio via/contact holes because of its poor step coverage. Several studies have attempted to overcome this problem by using W-CVD and reflow technology. The W-CVD is used for practical device fabrications. However, this technique has several problems such as poor adhesion to SiO2, poor W surface morphology, greater resistivity than Al, and the need of an etch-back process.Al reflow technology using a conventional DC magnetron sputtering system can simplify device-fabrication processes and achieve high reliability without Al/W interfaces. In particular, the Al reflow technology is profitable for multi-level interconnections in combination with a damascene process by using Al chemical mechanical polishing (CMP). These interconnections are necessary for miniaturized and high-speed devices because they provide lower resistivity than W and simplify fabrication processes, resulting in lower cost.This article describes recent Al reflow sputtering technologies as well as application of via and interconnect metallization.

Nearby Phase Search Algorithm with Reduced Complexity for Higher Order QAM Formats

2013 ◽  
Vol 760-762 ◽  
pp. 1869-1873
Author(s):  
Li Min Xia ◽  
Xian Zhou ◽  
Dong Yan ◽  
Na Na Zhang ◽  
Xiao Yun Wu
Keyword(s):  
Computational Complexity ◽  
Bit Error Rate ◽  
High Speed ◽  
Optical Transmission ◽  
Search Algorithm ◽  
Estimation Algorithm ◽  
Coherent Receivers ◽  
Multi Level ◽  
Reduced Complexity ◽  
Laser Line Width

This paper proposes a nearby phase search (NPS) algorithm based on BPS estimation algorithm in optical coherent receivers. And its suitable for arbitrary multi-level modulation. Making use of the continuity of phase change, the proposed NPS algorithm is applied to process nearby symbols by taking the pre-estimation phase of each symbol block as reference point. Compared to the traditional blind phase search (BPS) algorithm and its improved two-stage BPS algorithm, the performance of the proposed NPS algorithm is greatly improved in ultra-high speed coherent optical transmission system. By the simulation, the effectiveness and feasibility of the proposed algorithm are demonstrated in 28GBaud 16-QAM and 64-QAM system. Its shown that the computational complexity of the NPS algorithm greatly reduces in the guarantee of laser line width tolerance and bit error rate.

Design Techniques for High-Speed Multi-Level Viterbi Detectors and Trellis-Coded-Modulation Decoders

2018 ◽  
Vol 65 (10) ◽  
pp. 3529-3542 ◽  
Author(s):  
Hazar Yueksel ◽  
Matthias Braendli ◽  
Andreas Burg ◽  
Giovanni Cherubini ◽  
Roy D. Cideciyan ◽  
...  
Keyword(s):  
High Speed ◽  
Coded Modulation ◽  
Trellis Coded Modulation ◽  
Trellis Coded ◽  
Multi Level ◽  
Design Techniques

High-Speed, Multi-Level Operation of All-Silicon Segmented Modulator for Optical DAC Transmitter

2020 ◽  
Author(s):  
Yohei Sobu ◽  
Shinsuke Tanaka ◽  
Yu Tanaka ◽  
Yuichi Akiyama ◽  
Takeshi Hoshida
Keyword(s):  
High Speed ◽  
Multi Level

Dynamic Optimization Design of High-Speed Under-Table Swing-Arm Gripper System in Sheet-Fed Offset Press

2011 ◽  
Vol 230-232 ◽  
pp. 916-919
Author(s):  
Chang Xian Cheng
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Optimization ◽  
High Speed ◽  
Dwell Time ◽  
Optimization Design ◽  
State Of The Art ◽  
Print Quality ◽  
Swing Arm ◽  
Fixed Axis ◽  
Gripper Systems

By analyzing various kinds of gripper systems of different sheet-fed offset presses, the under-table swing-arm system, with a fixed axis, has the advantages of meeting high-speed press running requirement, keeping longer dwell time of printing sheets, helping improve print registration, and hence in favor of assuring HIFI print quality while having high press output. The dynamic optimization design of the under-table swing-arm system is vital to the higher performance of the system on the state of the art press machines. Through dynamic analysis of the gripper system, the way of dynamic optimization design and its correspondent formulas are derived in this paper.

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