Hi naderjavadifar,
not really ok; I don't know any foundry which offers a 0.9um process. Common process sizes are 1µm, 0.8µm, 0.5µm, 0.35µm, 0.25µm, 0.21µm, 0.18µm, 0.15µm, 0.13µm, 0.11µm .
But probably you think of a 90nm process? Pls. try and write more precisely, if you want accurate answers!
As a student, you can only get it from your University, if they have the licenses. If not, you could ask Agilent which University in your area might provide you the software and lend you a license.
Sorry I can't help :-(