Reduction of Vapor Emissions From Developer in Circuit Board Manufacturing
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
In the manufacture of printed circuit boards, the circuit board is passed through a chemical developer and then it is passed under air knives which blow air at the board to dry it. The flow of air from the air knives tends to increase the amount of chemical developer vapors which pass into the machine exhaust system. One particular system in common use has three air knives, two on the top of the circuit board and one below the circuit board. In normal operation these air knives blow air perpendicular to the surface of the board.