Modern Applications for Photochemical Etching
Photochemical etching is used a lot in the 21st century, in a large range of different industry sectors. photochemical etching is also known as photochemical machining, photo etching, or simply PCM. Some of the industrial applications for this kind of photo machining include fine screens, springs, apertures, battery grids, sensors, jewellery, washers, gaskets, seals, electrical contacts, circuit boards, and encoders. Photo etching was originally used during the birth of the circuit board industry in the 1960s, and it is still used today in the fabrication of highly complex circuits. However, silk screen printing is used in most commercial circuit boards today, with photo milling used by hobbyists and in the commercial production of complicated and detailed boards.
Photo chemical machining has a number of advantages over other machining methods, such as stamping, punching, laser cutting, water jet cutting, and electrical discharge machining. PCM is often more economical, more accurate, and more efficient than these other methods, which have more moving parts and involve heat. PCM can be used on a variety of different materials, including brass, copper, inconel, manganese, nickel, steel, stainless steel, zinc, and titanium. The materials used depend on the application of the machining, with some components only being made from specific materials and in specific size constraints. However, while photo chemical machining is highly versatile with regard to the materials used, there are some tight restriction with regard to the size of components being etched.
In general, PCM is limited to materials with a thickness between 0.013 mm and 2.0 mm, which does rule out some applications. However, for use within electronics and other industries that requires small precision parts, PCM is the ideal machining solution. Along with its versatility in terms of materials, PCM is also a highly economical way to fabricate components. Not only is the process of prototyping quicker and more efficient, but less wear is produced to tools and components alike. Because the phototools are only ever exposed to light, they are durable and able to be used for a long period of time. In general, the more complex the fabrication process is, the more economical the use of photo chemical machining is, which makes it ideal for a number of large scale modern industries.