Abstract
In semiconductor device manufacturing, single wafer processors are widely used in not only BEOL process but also in FEOL process for 2X devices to improve the cleaning efficiency and get the higher productivity. Because the scaled down devices require the minimum substrate loss in the cleaning steps, the physical force by a dual fluid spray is still the main position to improve the cleaning efficiency at the moment comparing with chemical effects as the dissolution of contaminants and/or the lift off of particles. Sato, et al., reported that the relationship between particle removal and droplet characteristics linked to the droplet energy densityEdas following equation [. The kinetic energyEkof droplet is calculated from droplet diameterdand velocityv, as shown in Equation 1.
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