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Limited Sheath-Collision for Plasma Immersion Ion Implantation and its Influence on Impact Energy and Dose Uniformity

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3 Author(s)
Yang Lu ; State Key Lab. of Adv. Welding & Joining, Harbin Inst. of Technol., Harbin, China ; Langping Wang ; Xiaofeng Wang

To increase the efficiency of plasma immersion ion implantation (PIII) batching, a limited sheath-collision method is proposed. Sheath-collisions between three cylinders with a triangular configuration are studied using a 3-D particle-in-cell simulation. Influences of sheath-collision extent on dose uniformity are obtained, and a criteria for determining the critical that requires that sheath-collision at the center of the triangle be avoided is proposed. In addition, depth profiles of the implanted ion obtained in PIII batching demonstrate that the critical sheath-collision value has an obvious influence on the implantation depth and dose uniformity.

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Plasma Science, IEEE Transactions on  (Volume:41 ,  Issue: 6 )