Spring 1990

Equipment Used in the Powderless Etching Process

Both these topics relate to one of modern technology's most exciting and fascinating discoveries; the Selective Etchant, or the Undercut Inhibitor. Here an etching solution is 'trained' to selectively respect the lateral sidewall areas of an etched object, when all of its natural tendencies call for it to attack these areas. It is an accomplishment of considerable merit.

Walter Striedieck