Comparison between Backscattered Electron Imaging and Secondary Electron Imaging
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Table 1737. Comparison between backscattered electron imaging and secondary electron imaging.
 
Backscattered electron imaging
Secondary electron imaging
Signal electrons
Are 'reflected' primary electrons from the atoms in solids Are secondary electrons generated by the primary electrons
Contrast
Is determined by the atomic number of the elements in the specimen (see page4801) Is determined by many factors  
Information depth
  ~ 1/100 of BSE
Spatial resolution
Worse because the signal electrons are emitted from a depth in the specimen Better

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