There are various form of giving vocal a "techno" effect
Now, as I expect you want that robot kind of voice or that radio trasmission effect
One can use only a EQ and while others can fill up the vocal track with others effects processors ( Reverb, Chorus, etc) untill it gets to where he wants
There are some speech synths or specific plug-ins that can do this instantly with a preset, but I find the best way is to record my own voice and then process the signal