production of electro-formed silk screens for electronic element supports

electroformed silk screen masks ensure good durability and very accurate reproduction of the sample to be printed. the level of flexibility of the mask can be controlled readily by the thickness a high degree of printing uniformity is possible

thick and thin film integrated circuits

defines thick and thin film hybrid integrated circuits and describes their method of manufacture. after dealing with substrates and methods of manufacture by photographic processes, discusses thin film production techniques, methods of deposition, photo-reproduction techniques, conducting and insulating films, and the manufacture of resis..

a micro silk-screen process for the manufacture of thick film circuits

describes the main factors required to set-up the process suitable for the manufacture of conductive and resistive networks of thick-film devices with small tolerances and good reproducibility the two principal elements contributing to silk-screen printing, the screen stencil and the screen machine are examined. in this respect the main p..

photography for printed circuits

deals with the techniques and processes used in the manufacture of printed circuit boards from photographic masters. the basic theory is to produce the working photomasters, for silk screen or photo-resist imaging, using as few steps as are compatible with the required quality and resolution. various techniques are discussed for artwork p..

dynamics of the bleaching of the transition between excited electron states of activator centers in alkali halide crystals

the usefulness of saturation dynamics studies of transitions between activator centre excited states is discussed. applications to multiphoton photoconductivity kinetics, transparent dielectric breakdown mechanisms, and longitudinal relaxation lifetimes determination are outlined. the bleaching dynamics of an excited electronic state tran..

using adhesive tapes in the pth process (pcb production)

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serial production line boosts pc board capacity

describes the manufacture of pc boards at the elfab corporation plant, westlake village, california. the facility turns out finished pc boards with plated-through holes ready to press fit contacts. plating, etching and silk-screening are part of a single, continuous process. after 5 h of a virtually non-stop operation, the board is finish..

thermal printhead technology and design

three common thermal printing technologies, transistor-resistor silicon mesa, silk screened thick film resistive, and vacuum deposited thin film resistive, are evaluated for a high speed, high resolution thermal printhead design

drying printed circuits with uv radiation

circuit boards are generally provided with solder resist and identification print. these are applied by silk-screening and to dry them more speedily and efficiently, the uv technique was devised the high-energy, ultraviolet radiation is tuned to the resonance of the carbon double bonds in the lacquer and causes hardening within a matter o..

classical and modern procedures for the reproduction of documents

reviews copying systems in use in the last 20 years. early methods included book printing, silk screen and reverse printing today there are at least two more methods, i.e. the office-type offset printer and the electrostatic copier. also, steadily gaining ground, is microfiche reproduction. the factors affecting the choice of a given syst..