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Chemical milling or industrial etching is the subtractive manufacturing process of using baths of temperature-regulated etching chemicals to remove material to create an object with the desired shape. [1] [2] Other names for chemical etching include photo etching, chemical etching, photo chemical etching and photochemical machining. It is ...
ferric chloride may be used for etching copper or zinc plates, whereas nitric acid may be used for etching zinc or steel plates. Typical solutions are 1 part FeCl 3 to 1 part water and 1 part nitric to 3 parts water. The strength of the acid determines the speed of the etching process. The etching process is known as biting (see also spit ...
Etching tanks used to perform Piranha, hydrofluoric acid or RCA clean on 4-inch wafer batches at LAAS technological facility in Toulouse, France. Etching is used in microfabrication to chemically remove layers from the surface of a wafer during manufacturing. Etching is a critically important process module in fabrication, and every wafer ...
In intaglio printing, the lines to be printed are cut into a metal (e.g. copper) plate by means either of a cutting tool called a burin, held in the hand – in which case the process is called engraving; or through the corrosive action of acid – in which case the process is known as etching. [6] [7]
Argon plasma etching has reported to enhance contact angle from 52 deg to 68 deg, [7] and, Oxygen plasma etching to reduce contact angle from 52 deg to 19 deg for CFRP composites for bone plate applications. Plasma etching has been reported to reduce the surface roughness from hundreds of nanometers to as much lower as 3 nm for metals. [8]
The process of stipple engraving is described in T.H. Fielding's Art of Engraving (1841). To begin with an etching "ground" is laid on the plate, which is a waxy coating that makes the plate resistant to acid. The outline is drawn out in small dots with an etching needle, and the darker areas of the image shaded with a pattern of close dots.
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From the beginning of the nineteenth century, new tools made engraving much easier and more exact. The ruling machine created parallel straight or wavy lines very close together, usually for use with etching. [6] Another of these tools is the geometric lathe. The lathe is used to engrave images on plates, which are in turn engraved on rolls for ...