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Chemical Etching Process Video
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Learn everything there is to know about chemical etching with our FREE whitepaper: https://resources.precisionmicro.com/... • The photo etching process involves photosensitive polymer being applied to a raw metal sheet. Using CAD designed photo-tools as stencils, the metal is exposed to UV light to leave a design pattern, which is developed and etched from the metal sheet. • Precision Micro engineers are highly trained to work with a wide range of digital CAD design formats, from which they plot front and rear component stencils known as photo-tools. • Precision Micro's photo-tools are so cost-effective to produce in relation to traditional tooling, that design revisions are implemented at a fraction of the cost, allowing customers to perfect their designs without the usual budgetary constraints. • Once a material has been selected for photo etching, it is imperative that it is thoroughly cleaned of all contaminants, allowing good surface conditions for etching. • The photo etching process can be achieved through a number of different lamination methods, including roller, wet-dip or dry lamination. This comprehensive range of approaches allows component manufacture from metal with thicknesses of 10 microns to 2 millimetres and in sheets up to 1.5 metres in length. • During the lamination process, it is important that contact between the photosensitive and metal layers is uninterrupted, so again a tightly controlled clean environment is essential. • The metal sheet is sandwiched between the photo-tools before exposure to a burst of ultraviolet light, which hardens selected areas of the laminate into an acid-resistant surface. The sheet is developed and any unexposed laminate is washed clear. • Acid solution is sprayed onto the sheet, dissolving the exposed areas of metal and revealing the product design. If the metal is exposed on only the front photo-tool then the acid will etch from only one side, and where both the front and rear photo-tools contain etchable areas, the metal will be entirely removed leaving smooth, burr-free edges, without affecting any material properties. The remaining resist is then stripped away to reveal the finished item. • The process often offers a natural solution to many design challenges. Components suitable for blood filtration, with features finer than a human hair, can be produced at the same cost as a simple cut out. And logos, part numbers and other special features can be incorporated at no extra cost. • https://www.precisionmicro.com/chemic...
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