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- Photochemical machining (PCM), also known as photochemical milling or photo etching, is a chemical milling process used to fabricate sheet metal components using a photoresist and etchants to corrosively machine away selected areas. This process emerged in the 1960s as an offshoot of the printed circuit board industry. Photo etching can produce highly complex parts with very fine detail accurately and economically. This process can offer economical alternatives to stamping, punching, laser or water jet cutting, or wire electrical discharge machining (EDM) for thin gauge precision parts. The tooling is inexpensive and quickly produced. This makes the process useful for prototyping and allows for easy changes in mass production. It maintains dimensional tolerances and does not create burrs or sharp edges. It can make a part in hours after receiving the drawing. PCM can be used on virtually any commercially available metal or alloy, of any hardness. It is limited to materials with a thickness of 0.0005 to 0.080 in (0.013 to 2.032 mm). Metals include aluminium, brass, copper, inconel, manganese, nickel, silver, steel, stainless steel, zinc and titanium. Photochemical machining is a form of photo engraving, and a similar process in microfabrication is called photolithography. (en)
- A moedura fotoquímica, também conhecida como fresagem fotoquímica ou fotocondicionamento, é um processo de fresagem química usado para fabricar componentes de chapa metálica usando um fotorresist e condicionadores para usinar corrosivamente áreas selecionadas. Esse processo surgiu na década de 1960 como um desdobramento da indústria de placas de circuito impresso. A foto-gravação pode produzir peças altamente complexas com detalhes muito finos de forma precisa e econômica. (pt)
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