Visiting Photochemical Machining

The photochemical machining or chemical milling industry is worth studying since it has advanced technologies which it shares with PWB fabrication. This “niche technology,” as the German title of Reference 1 implies, deals with very demanding precision requirements and fine geometries. During a recent visit to photochemical machining shops I have seen more 2-3 mil (50-75 micro) feature work than in any ”high tech” PWB shop.