Cleanrooms play a vital role in the manufacture of semiconductors. Based on the standard benchmark of cleanroom cleanliness, Class 100 cleanrooms, which represent the highest level of cleanliness, contain 100 or fewer particles measuring 0.5 µm or larger for each cubic foot of air. Canon has created a cleanroom in which the air contains no more than a single particle measuring 0.1 µm or larger per cubic foot. Leadingedge CMOS sensors are manufactured in this optimized facility, which is strictly controlled to ensure exceptional cleanliness.