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25 Years of Printed Circuit Board Research

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Retrospective, considers to what extent German pcb manufacturers adopted US-derived technology and to what extent developed indigenous processes. Includes treatment of SMT, high-speed boards, controlled impedance & signal integrity, optical boards & conductors. Laser patterning. The emphasis is on translation of R&D into manufacturing practice, defect avoidance & detection. In German. ISBN 3-87480-177-2. Euro 39 incl. 7% VAT.

250 keV Ar*2+ ion beam induced grain growth in tin oxide thin films.

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250 Years After Alessandro Volta's Birth

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Note in Bulletin section of Aug. issue with photos & sketch of early battery.

2500 Years of Paint history

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Feature on the Museum f. Lackkunst, in Munster, Germany with illustrations showing use of lacquers and paints.

26 year corrosion study comparing decorative hexavalent & trivalent chromium

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Using CASS, mobile, industrial & marine test conditions, Cr plated steel & zinc diecastings exposed to service conditions 1 to 4 are reported. L.a.b. colour measurements were used to assess results. Interlayers of thin nickel, bright & duplex nickel were used. Both variants gave at least a 10 year life, probably more. Microporous Cr outperformed standard Cr. 12 refs.

26 year corrosion study of decorative hexavalent & trivalent chromium

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Study compares performance of nickel + chromium plated steel and plated zinc diecastings, exposed to condition of severity ranging from Service Condition 1 to 4. Test methods incl. CASS salt spray, mobile, atmospheric exposure in marine, industrial climates. Cr deposits can be colour characterised using L.a.b system. STEP & Corrodkote tests were also used. Results shown in numerous tables. Conclusion that trivalent behaved at least as well as hexavalent and both met automotive requirements. 4 refs

26th Ulmer Gespraech - On-line control in plating lines

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Summary of lectures incl. six sigma, closed system chromium plating line and in-line Cr plating at Federal Mogul.

27 Al solid-state MAS-NMR spectroscopy of amorphous anodic oxide films on aluminium

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28th William Blum Lecture. Anodising of Aluminium - The Sealing Problem

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28th Wm. Blum Lecture describes the sealing of anodised Al, with diagrams showing structure of oxide layers. Disc'n of cold seals. A largely historical perspective is given. 18 refs.

2K paint handling with difficult paints

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Examination of switch to water thinnable paints which can overcome many problems such as environmental legislation or district zoning legislation. However its use, esp. on wood and MDF calls for different techniques to overcome swelling & longer drying times. Focus on 2K PUR coating with table summarising delivery containers, application methods. The latter are detailed incl. Turbo-coat air plant, Aqua-spray electrostatic, use of pre-heated paint with special thermo-tube. The problem of process monitoring & instrumentation for this and quality control is also addressed.

2K waterborne coatings continue to gain acceptance

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Review of current developments in the formulation of two-component waterborne polyurethane coatings.

2nd Ann. Meeting of German Inst. f. Werkstoffe und Oberflaechen e.V (IWO)

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Summaries of talks incl. paint stripping from aluminium or magnesium components, development of corrosion resistant Al alloys, manufacture of aluminium foam, techniques for working magnesium. Ceramic anodic oxide (anodised) MAGOXID-COAT (R) plasma formed. Plating onto magnesium. Corrosion testing of Al alloys.

2nd Biennial PCE Powder Coat Conference & Show in Amsterdam

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5 page Supplement previews title Show, lists exhibitors and what they are displaying, briefly summarises speakers & their topics at the 3 day event, 19-21 Jan.

2nd European Printed Circuit Conference in Berlin - Report on the Meeting

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Lectures on recycling of copper containing etch baths, process control, new Compact desmear & PTH process, formaldehyde free electroless Cu; horizontal board processing; digitally controlled illumination; continuous pressing of substrate material; brominated epoxy resins; reliable SMD reflow; relevant parameters for solderable board coatings; measurement of cleanliness after inert wavesoldering; aqueous cleaning of p.c.b's; use of SPC, quality control & Taguchi methods & other topics.

2nd Generation Metallic Powder Coating

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New generation of title powders exhibit improved electrostatic charging behaviour and enable better colour consistency. SEM show powder (resin) and metallic effect particles as separated at the dry mixing stage, then fused after the bonding process. The new materials are seen as strong competitors to wet paint.