Patent ID: 6547974
Filing Date: 2003-04-15
Classification: H05K

Abstract:
A method of producing a circuit board, comprising the steps of:(a) patterning a resist layer that overlays a substrate of the circuit board to define desired circuit paths; (b) removing the patterned resist layer in the desired circuit paths; (c) depositing a conductive material on the circuit board in the pattern defined by the removed resist layer so that the height of the conductive material relative to the substrate exceeds the height of the resist layer relative to the substrate; (d) applying a low-reactive solution, over at least the conductive material, that initially removes a surface portion of the conductive material and forms a film barrier that inhibits any further removal of the conductive material; (e) disrupting the film barrier to thereby stimulate removal of additional surface portion and formation of additional film barrier; and (f) repeating step (e) until the conductive material is at a desired uniform height relative to the height of the resist layer above the substrate.