Patent ID: 8377252
Filing Date: 2013-02-19
Classification: C23F,H05K

Abstract:
1. An apparatus for spraying an etchant, the apparatus comprising: two manifolds generally parallel to each other, two first pumps mounted on the two manifolds, respectively, a plurality of feed pipes in fluid communication with both of the manifolds in such a manner that one end of each of the feed pipes is connected with one manifold and the other end of each of the feed pipes is connected with the other manifold, each of the feed pipes having a plurality of spray nozzles mounted thereon, the feed pipes cooperatively constituting a spray region, some of the spray nozzles located at a central area of the spray region, and other of the spray nozzles located at portions of the spray region outside of the central area, and a pressure-boosting device mounted on each of the feed pipes and configured for increasing spray pressure of the spray nozzles which are located in the central area of the spray region.