Only 5 Metal Atoms per Square Centimeter! The “Cleanliness” Standards of Semiconductor Cleaning Hide the Secrets to Chip Yield
In semiconductor factories, the cleaning process has a set of “extremely strict” standards: since 2013, the number of metal atoms on the surface of each square centimeter of a wafer cannot exceed 0.5×10¹⁰ (equivalent to allowing only 5 soccer balls on a soccer field), the diameter of particles on the back must be less than … Read more