Method to Form an Electromagnetic Shield on a Component-Populated Electronic Circuit Board
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-01
A method is described which enables an entire circuit board to be shielded for the prevention of electromagnetic radiation using minimum space, material, and labor. It also provides for hermetically sealing the circuit board against oxidation and fungus. Historically, shielding has been a method used for prevention of electromagnetic radiation. The usual shielding method of using metal covers, cans, fingerstock, etc., has proven very difficult to manufacture. The following steps are employed in the new method. 1. Mask the connectors and mounts on the boards. 2. Dip or spray the unmasked area of the board with material which has good thermal conductivity and high electrical re sistance. Use a material which will harden. 3.