Laser power for Direct writing on SU-8 Photoresist

[o***@gmail.com]

Hello,
I am trying to calculate the laser power required to write on a Su-8 layer of a particular thickness. I know the wavelength of the laser and the energy density I need to achieve on the SU-8 layer and other parameters like absorbance, duty cycle are also known. How would I calculate the power that I need to use?

Any help is much appreciated
Thanks
Ravi

[Phil Hobbs]

Post by o***@gmail.com
Hello,
I am trying to calculate the laser power required to write on a Su-8 layer of a particular thickness. I know the wavelength of the laser and the energy density I need to achieve on the SU-8 layer and other parameters like absorbance, duty cycle are also known. How would I calculate the power that I need to use?
Any help is much appreciated
Thanks
Ravi

What sort of laser are you planning to use? SU8 is an I-line resist,
and its sensitivity falls off quite rapidly at wavelengths longer than
390 nm iirc.

Cheers

Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net