So if I've got this correct, you've got a 50x50x0.8mm geometry made up of lots of sections of 0.2-0.7mm.

I don't know which technology you are planning to use, but you are going to struggle with most of them at this scale, and if successful it will not be very accuratedetail-1.jpg

As CA said above, what settings are you trying to process this with? It might help us understand whether it's achievable.

Rich