Electrodeposition of Photoresists for Printed Wrighting Board Application
The electro-deposition ( ED) of organic coatings is
over 30 years old. Development initiated during the
19605, brought this technology into practical applka·
lions. Now ED is a state of the art coating process,
which finds use in various industries.
ED is used to apply protective coatings to car bodies,
with substantially better results than previous methods.
In other industries, cost savings are achieved through
improved unifonnity of the surface coating.
A more recent refinement of this tedmology is used
to apply photoresist for manufacture of PWB.
This development was introduced during the 1980's
and resulted in the practical use of electrophoretic
depositable photoresists as materials used for image
transfer in the Printed Wiring Boards (PWB) industry.
In the following paper, the various aspects of the
available systems will be described; and questions will
be answered relating to process integration, advantages
over existing photoresist technologies, environmental
compatibility, and costs.