Diffraction and Semi-Conductor Lithography

Click For Summary
SUMMARY

Diffraction poses a significant challenge in semiconductor manufacturing, particularly for processors with transistors at the tens of nanometers scale. The discussion highlights the limitations of traditional photolithography and the transition towards specialized techniques to overcome these challenges. Notably, sub-wavelength and sub-diffraction limit methods are essential for advancing beyond the 65 nm process technology. The impending end of conventional photolithography has been a topic of concern among experts in the field.

PREREQUISITES
  • Understanding of photolithography techniques
  • Familiarity with semiconductor manufacturing processes
  • Knowledge of diffraction limits in optics
  • Awareness of sub-wavelength and sub-diffraction limit technologies
NEXT STEPS
  • Research advanced photolithography techniques beyond 65 nm
  • Explore sub-wavelength lithography methods
  • Learn about the implications of diffraction in optical systems
  • Investigate alternative lithography technologies such as EUV (Extreme Ultraviolet) lithography
USEFUL FOR

Engineers, semiconductor manufacturing professionals, and researchers focused on lithography techniques and the future of processor technology will benefit from this discussion.

peter.ell
Messages
42
Reaction score
0
I was curious as to how semiconductor manufacturing gets around the fact that diffraction should prevent processors with transistors on the scale of tens of nanometers from being possible.

How do we get around this if the diffraction of light is a fundamental limit to how small we can do any light-based etching?

Thanks so much!
 
Engineering news on Phys.org
It gets tougher and tougher, but the impending end of photolithography has been predicted for years on end. I'm not an expert in photolithography (especially at the low-end of size scales), but yes, there are some limiting factors:
http://en.wikipedia.org/wiki/Photolithography#Resolution_in_projection_systems

The more specialized sub-wavelength and sub-diffraction limit techniques are discussed in more detail at the Wikipedia article starting with the 65 nm process technology:
http://en.wikipedia.org/wiki/65_nanometer

Not an in-depth explanation, but hopefully a starting point.
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
3K
Replies
7
Views
2K
Replies
1
Views
1K
Replies
14
Views
2K
  • · Replies 7 ·
Replies
7
Views
6K
  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 0 ·
Replies
0
Views
913
  • · Replies 6 ·
Replies
6
Views
3K
Replies
7
Views
3K
  • · Replies 38 ·
2
Replies
38
Views
6K