Patent ID: 9406500
Filing Date: 2016-08-02
CPC Classification: H01L

Claim Text:
1. A flux residue cleaning system, comprising: a first immersion chamber configured to receive a wafer, the first immersion chamber adapted to soften an outer region of a flux residue formed around microbumps interposed between the wafer and a die when the wafer is immersed in a first chemical; a first spray chamber adapted to receive the wafer from the first immersion chamber, the first spray chamber comprising a first sprayer, the first sprayer discharging a first chemical spray towards the wafer, the first chemical spray impinging on the flux residue to remove the outer region of the flux residue in order to expose an inner region of the flux residue; a second immersion chamber adapted to receive the wafer from the first spray chamber, the second immersion chamber adapted to soften the inner region of the flux residue when the wafer is immersed in a second chemical; a second spray chamber adapted to receive the wafer from the second immersion chamber, the second spray chamber comprising a second sprayer, the second sprayer discharging a second chemical spray towards the wafer, the second chemical spray impinging on the flux residue to remove the inner region of the flux residue in order to clean the wafer; and a drying chamber adapted to receive the wafer from the second spray chamber, the drying chamber adapted to dry the wafer when the wafer is exposed to a flow of nitrogen; wherein: