Patent ID: 6242272
Filing Date: 2001-06-05
Classification: H01L

Abstract:
A reverse profiling method for profiling a modulated impurity density distribution of a specific semiconductor device with a specific structure, said specific semiconductor device produced by a first producing process which invites inverse short channel effect, said reverse profiling method comprising:producing first semiconductor devices by the first producing process so that said semiconductor devices have the specific structure in common except for gate length,finding first threshold voltage-gate length characteristics based on threshold voltages and gate length of said first semiconductor devices,producing second semiconductor devices by a second producing process which is less likely to invite the inverse short channel effect than the first producing process so that said second semiconductor devices have the specific structure in common except for gate length,finding second threshold voltage-gate length characteristics based on threshold voltages and gate length of said second semiconductor devices, andfinding said modulated impurity density distribution of said specific semiconductor device on the basis of said first threshold voltage-gate length characteristics and said second threshold voltage-gate length characteristics.