Technique for Making Cards And Boards Repairable
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-29
The repair of cards and boards results in a significant loss of copper particularly in the plated-through holes. However, it has been discovered that by the simple application of a coating of electroless nickel (boron, not phosphorus) after all etching has been completed and finally, followed by a thin layer of electroless gold or solder dip will render such card or board plated in this manner capable of sustaining repeated rework without degradation in the plated-through holes.