How to spin coat thin polymer film on glass substrates with a spin coater?
How to spin coat thin polymer film on glass substrates with a spin coater?
First of all, please define the type of thin polymer film you need to deposit and how you can dilute it. To control the thickness of a thin polymer film, sol-gel spin coating can be used.
The parameters are the concentration of the sol solution (creating viscosity), the rotation speed rate and also the time of the rotation. And of course the amount of the sol. (See also thin film thickness uniformity after spin coating).
You should drop the polymer first, and then start spinning. If the solution is too viscous than high speed
rotation is preferable. If the thickness at high speed is 100nm, you can repeat the spin coating at the
same speed several times, until you obtain the required thickness.
rotation is preferable. If the thickness at high speed is 100nm, you can repeat the spin coating at the
same speed several times, until you obtain the required thickness.
Just remember, film thickness decreases with the decrease of concentration and increase of spin-on
rotation. For example, to deposit 500 nm PMMA film you could use a solution with a concentration of
say 7% and rotation speed of 3000 rpm for 30 sec.
rotation. For example, to deposit 500 nm PMMA film you could use a solution with a concentration of
say 7% and rotation speed of 3000 rpm for 30 sec.
Tip: to measure the thickness of the film quickly: SPS-Europe offer the USB connectable FR-portable, a nice, portable, and affordable, in-situ thickness measurement tool.
