Patent ID: 9553005
Date: 2017-01-24
CPC Classifications: B08B,H01L

Claim:
1. A metal liftoff apparatus comprising: a. an immersion tank having a first and second opposing sidewalls and a bottom, the immersion tank dimensioned to receive a cassette of wafers and a working fluid; b. primary spray jets positioned on the first and second opposing side walls of the immersion tank; c. secondary spray jets positioned on the bottom of the immersion tank; d. a stationary lifting assembly positioned at the bottom of the immersion tank for lifting the wafers a distance from a bottom portion of the cassette such that all portions of the wafer surfaces are exposed to the primary spray jets while submerged in the immersion tank; and e. a lifting and lowering mechanism connectable to a cassette of wafers configured to raise and lower the cassette of wafers while in the cassette of wafers remains submerged in the immersion tank.