Abstract—Particles within plasma etching equipment stick to the wafer and cause defects, resulting in large scale integrated circuit (LSI) yield reduction.We observed the behavior of particles resuspended in a vacuum chamber using a laser light scattering method. Investigating the influences of gases, static electricity, and plasma on particle resuspension, we found out that particles are no…
Abstract—The existence of recoil particles from the turbo molecular pump has been verified. The recoil particles may be the root cause of yield degradation for the vacuum processes such as the plasma etching processes. To eliminate the recoil particles, they must be trapped inside the turbo molecular pump or inside the manifold chamber. After experimenting with various materials and designs,…