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K+ ISFET type microsensors fabricated by ion implantation

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MCP Possibility of obtaining K+ ISFET microsensors produced by mild ion implantation technique is investigated. Selective membrane is obtained by low energy implantation of K+ and Al+ ions directly into thin silica insulator (100 nm) of microsensor. K+sensitivity, selectivity, drift, reproducibility, and life time are studied. Sensitivity of implanted ISFET 41-44 mV/pK is stable after 1 year's tests.

Kaolin composition for electrodeposition paint

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Pigment composition contains hydrous kaolin. comprising particles of size distribution of which 98% <2µm, 90% >0.5µm, with median particle size <0.3µm.

Karlsruhe Printed Circuit Board Congress - A report

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Summaries on planning, 3D-MID (moulded interconnection devices), soldering (ALERT = Advanced Laser Reflow Soldering for Surface Mount Technology), use of nitrogen and gaseous activators; Quality Assurance for SMD, Chip-on-Board; assembly testing were all treated.

Kawasaki Steel's experiences and features of overseas tinning lines

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Overview of electrolytic tinning lines installed by Kawasaki with statistics on capacity, layout plans, photos and sketches of cells, details of tin regeneration and other operational details. 4 refs

Keep compressed air clean: analytical methods for quality testing.

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Purity classes (oil, particles and water) according to ISO 8573-1 are tabulated and testing is discussed. It is noted that compressed air must be properly conditioned for use and its quality monitored by means of suitable measurement methods. To test the quality of compressed air, either ready-for-use analytical methods may be applied, e.g., sample tubes which may be used to conduct testing on site, or more complicated laboratory measurements which involve a sample being taken on site and subsequently analysed in the laboratory. Sample tubes may be used to determine the concentrations of inorganic gases as well as oil contents of 0.1mg/cu.m or higher. A table illustrates the use of Draeger tubes and test medical gases for determining impurities in compressed air. Residual oil content in compressed air in the 0.01 mg/cu. m range may be determined using a laboratory procedure which was developed on the basis of ISO 8573-2 and 8573-5.

Keep is clean

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Ultrasonic and electrolytic cleaning and electroplating is described at Dripcut Corp., Goleta, CA.

Keep powder in and labour out

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Powder booths are discussed, considering safety, efficient powder deposition, rate of air extraction, air speed, filters, automatic cleaning, etc.

Keep your cleaners clean

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Deals with equipment for maintenance of cleaning solns., with special reference to parallel plate gravity separators.

Keeping cutting oils clean

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Cooling & cutting oils are soon contaminated, in part with solids from the grinding or abrading process, in part with other oils carried in on the component. Continuous cleaning, e.g with centrifugal filtration, is described.

Keeping engines shipshape - plating onto aluminium

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Visit to Messrs Mercury Marine, where corrosion resistance of their products exposed to marine environment is vital and cadmium replacement was highly desirable. Aluminium is electrodeposited in sealed system (non-aqueous, Alumiplate process). After chromating, this offers 6000 hrs+ salt spray resistance.. A 0.3 mil layer ensures pore-free layer (www. alumiplate.com). Related article on coating for marine products www.pfonline.com/articles/09905.html.

Keeping motor vehicle parts wet during preparation for painting

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Unfinished motor vehicle body is kept wet between pretreatment baths by conveying them within enclosure open towards pretreatment baths and arranged to move above them, keeping bodies wet in ambient air within enclosure, body being warmer than ambient air, generating wet vapour atm. in ambient air within enclosure by expanding saturated water vapour part of which saturates ambient air to max. humidity, water vapour condensing into wet vapour.

Keeping paint shop contamination at bay

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Describes "Takrags" which are wipes & related products which can absorb particulates, lint etc so minimising defects caused by such matter.

Keeping pretreatment simple

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Case study of metalworking shop which installed powder coating, then added pretreatment. System chosen was "Plaforization" from Carpenter Chemicals, a one-stage cleaning, phosphating & sealing process. Sketch shows simple plant which creates no effluent and for which solution lasts forever. Note on Italian inventor, Dr Gianluigi Guidetti. website www.cc-lc.com

Keeping the edge on the surgeon's scalpel

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Brief description of 'Keramo' (W. Canning Materials Ltd.) vibratory finishing process at W. Skidmore & Co., Sheffield, Yorks.

Keeping the strength in steel structures

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Anticorrosive coatings for ships, the phase-out of coal tar/epoxy water ballast tank coatings started in early 1990's, and proprietary epoxy systems are mentioned.