Control of Negative Working Electro-depositable (ED) Photoresist

The electrodeposition of organic materials (also known as electrocoating or electrophoretic coating) is a technique well known in a variety of industries. It was first applied broadly to the underpainting of car bodies and currently 25,000 – 30,000 tones are used annually in this industry. Recently however new applications have been found for this new technology, the latest of which is in the area of photoresists. Already this technique is finding use as a primary imaging resist in printed circuit boards (PCB’s), in the manufacture of 3D molded interconnects and for depositing etch resists for photochemical machining.