Finding the Best Spin-Coating Thickness Model

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SUMMARY

The discussion focuses on selecting the optimal spin-coating thickness model for depositing a gel layer between 10 to 100 µm using a spin-coater. Participants recommend consulting the material specification sheets provided by photoresist manufacturers, which detail expected layer thickness based on parameters such as RPM and time. The conversation highlights the necessity of trial and error in achieving desired thicknesses and suggests comparing the gel to known photoresists for better predictions. Additionally, users are encouraged to explore various spin-coater products and services for quality assurance.

PREREQUISITES
  • Understanding of spin-coating techniques
  • Familiarity with viscosity and its impact on coating thickness
  • Knowledge of experimental parameters such as RPM and curing time
  • Ability to interpret material specification sheets from photoresist manufacturers
NEXT STEPS
  • Research spin-coating models and equations for predicting layer thickness
  • Explore the properties and specifications of various photoresists
  • Investigate different spin-coater brands and their performance reviews
  • Conduct experiments to compare gel thickness against known photoresist data
USEFUL FOR

This discussion is beneficial for materials scientists, chemical engineers, and researchers involved in thin film deposition and spin-coating processes.

gkiverm
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I'm planning to deposit a thin layer of a gel (~10 - 100 uM), which will later be heat cured using a spin-coater. I've looked at a few models to predict the thickness of the gel based on experimental parameters (rpm, viscosity, time, etc.) but am still unsure on which model is the best to go with. Some of the papers I've looked at...

1) http://scitation.aip.org/docserver/fulltext/aip/journal/jap/29/5/1.1723300.pdf?expires=1405288372&id=id&accname=2098200&checksum=5FCAD27BDE3C78763F0067815FB0BC34

2) http://scitation.aip.org/docserver/fulltext/aip/journal/jap/56/4/1.334049.pdf?expires=1405290946&id=id&accname=2098200&checksum=DA1B621E7F9DD6BDB4490AFD442D0674

A good amount of the math is too complicated for me, so I'm just looking for an equation/model I can use to predict what experimental parameters I should use to achieve a certain thickness (roughly).

Thank you
 
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Photoresist manufacturers typically list the expected layer thickness dependence on rpm, time, etc... on their material spec sheet. These numbers are nominal, and some trial and error is expected.

I don't know what type of gel your using, but maybe you can compare it to a known photoresist.
 
I have been looking for this product/service and I found this one used spin coater I am not sure about the quality or the origin of their offering. Has anyone have looked into this before? If you have any other options you know are worth the time to check out, please post them here. Thanks!
 

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