Results 251 to 260 of about 390,506 (291)

Measurement of Residual Flux in Permanent Magnets

International Journal of Electrical Engineering & Education, 1983
A simple and accurate method, using a search coil and a calibrated fluxmeter, is presented for experimental determination of residual flux of permament magnets of simple geometries. Applied to a small rectangular AlNiCo-VI magnet used variously, the method shows the importance of preventing accidental, or otherwise, demagnetisation of permanent ...
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Single flux quantum circuits using the residue number system

IEEE Transactions on Appiled Superconductivity, 1995
We have designed and developed superconducting single flux quantum (SFQ) digital signal processing circuits using the residue number system (RNS). RNS arithmetic is a complete alternative to binary arithmetic for performing digital computations, which appears to have many advantages for SFQ circuits.
null Qing Ke, M.J. Feldman
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Effect of solder flux residues on corrosion of electronics

2009 Annual Reliability and Maintainability Symposium, 2009
Flux from ‘No Clean’ solder processes can cause reliability problems in the field due to aggressive residues, which may be electrical conducting or corrosive in humid environments. The solder temperature during a wave solder process is of great importance to the amount of residues left on a PCBA[a].
Kirsten Stentoft Hansen, Morten S. Jellesen, Per Moller, Peter Jacob Schwencke Westermann, Rajan Ambat   +4 more
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Rosin Solder Flux Residues

1985
More and more, the ultimate reliability of a printed circuit board is considered to depend on its cleanliness level. The three main reasons for this are the increased use of faster soldering speeds which demand fluxes with higher activity levels, developments in PCB technology which permit higher density conductor lines and spacings needed for higher ...
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Residual fluxes of water in an estuarine lagoon

Estuarine, Coastal and Shelf Science, 1988
Abstract Observations of currents are presented for three stations in Khowr Al-Zubair (south Iraq); the observations were made over a complete tidal cycle, on both neap and spring tides, and the data are analysed to provide estimates of the residual fluxes of water.
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Low residue flux for 3D-IC u-bump stacking

2014 9th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT), 2014
In 3D-IC packages, the Si-to-Si stacking is joint by u-bump which has fine gap structure and high bump count. Because of the high density structure, the flux clean process face challenges. So, non-clean flux is another alternative. However, the flux residue can cause reliability issue such as UF delamination, corrosive relation, electro-migration due ...
Yi-Chian Liao, Jung-Pang Huang, Chun-Tang Lin, Huei-Nuan Huang, Jeng Yuan Lai   +4 more
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Non‐ionic Water Soluble Flux Residue Detection by XPS

Circuit World, 1991
For many years the analysis of contaminant residues on PWB surfaces has been of major importance to the industry. While the identification of residues left on metallic surfaces has proven to be relatively straightforward, the analysis of organic contamination of similar composition to that of the underlying board surface has not been as successful ...
A. Hirt, I. Artaki
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Quantifying residual numerical diffusion in flux-corrected transport algorithms

Journal of Scientific Computing, 1991
Residual diffusion in fluid-dynamics calculations results from the finite order of approximation in the underlying linear algorithm, including the effect of smoothing sometimes added for numerical reasons, and, in the case of monotonicity-preserving algorithms such as flux-corrected transport (FCT), the nonlinear action of the flux limiter on steep ...
David L. Book, Chiping Li, Gopal Patnaik, Fernando F. Grinstein   +3 more
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Kinetics of flux residue formation in a humid environment

Twenty First IEEE/CPMT International Electronics Manufacturing Technology Symposium Proceedings 1997 IEMT Symposium, 2002
Flux residue has been a manufacturing concern for many decades, as these potentially conductive residues increase the possibility of circuit failure. To avoid this, printed wire assemblies were cleaned with chloroflourocarbon (CFC) solvents. However, CFC's are very detrimental to the environment, contributing to the destruction of the ozone layer ...
A. Sinni, M.A. Palmer
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Flux Residue and Migration in Charge Air-Cooled Engines

SAE Technical Paper Series, 2020
<div class="section abstract"><div class="htmlview paragraph">Traditionally, most charge air coolers (CACs) have been constructed using the Nocolok aluminum brazing process. The Nocolok process uses flux, some of which remains after the manufacturing process, and migrates through the intake tract to the engine during normal use.
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