Journal of Vacuum Science & Technology B, Vol.18, No.1, 580-585, 2000
High-resolution two-dimensional dopant characterization using secondary ion mass spectrometry
A quantitative two-dimensional (2D) boron dopant profiling for submicron technology has been demonstrated using secondary ion mass spectrometry (SIMS). A novel test structure incorporating a moire pattern has been developed to improve SIMS lateral resolution. This approach significantly simplifies 2D SIMS test chip manufacturing, data acquisition, and analysis. As a result, 2D dopant profiling with a lateral resolution limited by the photomask pixel size (10 nm) and sensitivity df; 3x10(17) cm(-3) has been realized on commercial equipment. 2D dopant profiles are reproducible within 10 nm. The measured profiles were compared with 2D Monte-Carlo and calibrated TSUPREM4 simulations and showed good agreement.