Patent ID: 8367476
Filing Date: 2013-02-05
Classification: H01L

Abstract:
1. A method of preventing contaminants from forming on metal surfaces of semiconductor package connectors, the method comprising: a. performing a first cleaning of a semiconductor package using a cleaner agent, thereby reducing surface tension of unexpected material; b. performing a first DI water rinsing of the semiconductor package, thereby removing the unexpected material and the cleaner agent; c. performing a second cleaning of the semiconductor package; d. performing a second DI water rinsing of the semiconductor package, thereby ensuring exposed surfaces of metal connectors are clean and ready for treatment; e. predipping the semiconductor package, thereby activating the surfaces; f. treating the semiconductor package with an anti-tarnish solution during a singulation process; g. performing a third DI water rinsing of the semiconductor package, thereby cleaning excess chemical and ionic contaminants; h. postdipping the semiconductor package, thereby protecting a metallic coating; i. performing a fourth DI water rinsing of the semiconductor package; and j. drying the semiconductor package.