Is Raster Scanning Still the Best for High-Resolution SEM Imaging?

AI Thread Summary
Raster scanning remains a prevalent method for high-resolution scanning electron microscopy (SEM) imaging, but questions arise about its effectiveness compared to newer technologies. The discussion highlights that the scan type itself does not inherently affect resolution; rather, improvements in resolution depend on the electron gun and other components. The analogy of reading smaller print emphasizes that changing the scanning pattern alone won't enhance image clarity without better optics. Clarification is made that the raster generator is likely associated with the electron gun. Overall, while raster scanning is still widely used, advancements in SEM technology continue to evolve.
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Looking at Ben Krasnow's youtube video on breaking down the parts and general cost for a scanning electron microscope, he lists a raster scan generator, is that able to produce the highest resolution images still? Or is there another more modern technology for this purpose? Otherwise, how has raster scanning advanced to increase resolution?
 
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Coincidentally, I watched that exact video earlier today.
I don't see how the scan type would affect resolution. Reading a book is very much like raster scanning, if you want to read smaller print then reading the text in a different pattern (say, a spiral) will not help one bit - you need glasses.
Take this with a large grain of salt as my knowledge of SEM is next to nil.
 
It seems I just had a misunderstanding, I think the raster generator would be the actual electron gun
 

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