Two types of diffusions of the small molecules in the polymers were discussed. 體系大小對擴散系數的計算值影響甚微。
The impurity concentration profile depends on epitaxy growth velocity, growth time and impurity diffusion coefficient. 如果雜質(zhì)的擴散系數很小,雜質(zhì)在外延層中的深度分布是均勻的。