Patent ID: 6048743
Filing Date: 2000-04-11
Classification: H01J,H01L

Abstract:
A method of calibrating a scanning electron microscope comprising:providing a first insulating layer having a first pattern of a first predetermined dimensions formed on a semiconductor wafer substrate;providing a plurality of contacts between said first pattern of the first insulating layer such that said contacts directly communicate with said wafer substrate, said contacts carrying electrical charge to said wafer substrate;providing an electrically conductive layer over said contacts and said first insulating layer for transferring charge received from the scanning electron microscope;providing a second insulating layer having a second pattern of second predetermined dimensions formed over the conductive layer;measuring the dimensions of the first and second insulating layers using the scanning electron microscope;comparing the dimensions measured by the scanning electron microscope to the first and second predetermined dimensions; andadjusting, when the comparing indicates the measured dimensions and the first and second predetermined dimensions are different, the scanning electron microscope in accordance with the comparing.