Protection for Exposed Copper Conductors on Printed Circuit Board
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
An aqueous solution of benzotriazole (BTA) is applied to copper conductors on the surface of a printed circuit board. The BTA forms an impervious film that protects the copper from moisture and flux residues. The BTA can be applied to the board after soldering and other manufacturing operations have been completed by dipping the board in the solution. The BTA can be applied in the field by cleaning an area of the board with a solvent, applying the solution with a swab, and wiping off the solution after a few minutes.