Karl Martinson of Micrometal Etching Group on how it works.
Photochemical etching has been around for decades as an engineering technology to create fine structures. It’s conceptually simple: impress an image of the desired structure on a metal substrate, using inks or coatings that are chemically resistant, then immerse the entire substrate in a strong etchant that will dissolve away unwanted material, leaving behind a high-resolution and complex part that can be extremely small. As a micro machining technology, it can do a lot more than manufacture watch springs, and to discuss this interesting technology and advanced applications.
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