1,720,990 research outputs found
Diameter control of an extremely thin cylindrical microprobe by electrochemical etching
No full textElectrochemical etching is shown to produce slender cylindrical tungsten probes used as microelectrodes for micromachining or in electrochemical studies. A mathematical model is derived for diameter control of the microprobes and its validation is investigated through experiments. (C) 2000 American Institute of Physics. [S0034-6748(00)03405-5]
An electrochemical fabrication method for extremely thin cylindrical micropin
No full textThis paper deals with a slender micropin, which can be used for micromachining. The shaping mechanism in electrochemical etching is investigated on the basis of electrochemical kinetics. The pin profile can be controlled by adjusting the current and voltage level. A mathematical model is derived for controlling the diameter of the micropin. (C) 2001 Published by Elsevier Science Ltd
Fabrication of tungsten micro-punch for micro-nozzles
No full textA very thin electrode with a tapered shape and a cylindrical tip, named ultrathin punch, is fabricated by electrochemical etching and by controlling the vertical position of the electrode during etching. We used electrochemical etching by which we obtain punches quickly and simply. The fabrication procedure and its results are presented in this article. With this punch, we can get holes or nozzles for ink-jet printers, textile machines, and other uses. Various angles of the taper can be obtained by adjusting the immersion depth. The tip diameter also can be controlled by adjusting current density and etching time. (C) 2001 American Institute of Physics
Fabrication of arbitrarily shaped microelectrodes by electrochemical etching
No full textSome conventional machining methods have been developed to machine microelectrodes. However, these methods still require too much time and too many resources. This paper uses electrochemical etching as an alternative method for the simple and cheap fabrication of microelectrodes. Electrochemical etching is usually considered an appropriate method of producing sharp probes. However, it is possible for the entire shape of an electrode to be controlled under certain conditions such as the immersed length, the applied current, and the etching time. After developing a method to estimate the electrode shape, we produced some electrodes by generating etching conditions. Stepped and punch shapes were fabricated. These have applications in the manufacturing of operation utensils, measurement tips, and machining tools.This work was supported by the Center for Ultramicrochemical
Process Systems (CUPS)
Fabrication of cylindrical micropins with various diameters using DC current density control
No full textAn electrochemical method is shown to fabricate extremely thin cylindrical tungsten micropins. The cylindrical micropin is obtained by regulating the current density. The current profile for the current density control is obtained with a mathematical model based on the relationship between an electric charge and a surface area. (C) 2003 Published by Elsevier Science B.V
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