UNAUTH PENETRATION OF AIRSPACE.

Narrative

I WAS SIC IN THE ACFT ATTEMPTING TO GET OUR IFR CLRNC ON THE GND AT FFZ. THE TWR HAD JUST CLOSED AND WE THOUGHT WE COULD TALK TO PHX DEP ON THE GND. WE SOON DISCOVERED THAT WAS NOT POSSIBLE. THE CAPT THEN MADE THE DECISION TO DEPART RWY 22L VFR AND GET OUR IFR CLRNC IN THE AIR. WE GOT AIRBORNE; CALLED PHX DEP ON 119.2 AS SOON AS WE WERE 1000 FT AGL. PHX DEP RESPONDED AND ASKED IF WE WERE LOOKING FOR OUR CLRNC. AS THIS CONVERSATION TOOK PLACE; THE CAPT CONTINUED A CLBING L TURN TO THE NE IN HOPES OF AVOIDING THE MOUNTAINS TO THE E OF THE ARPT. THE CTLR THEN CAME BACK TO US AND ASKED IF WE KNEW WE HAD VIOLATED THE CLASS B AIRSPACE. IN A ROUND ABOUT WAY THE CAPT AFFIRMED HE DID KNOW; BUT WAS TRYING TO STAY AWAY FROM THE MOUNTAINS. I BELIEVE THIS OCCURRED BECAUSE WE GOT IN A BIT OF A HURRY BECAUSE OF OTHER TFC BEHIND US WAS TRYING TO DEPART. WE SHOULD HAVE GONE BACK TO THE TERMINAL; GOT ON A PHONE AND OBTAINED A CLRNC VOID TIME OR STUDIED THE AVAILABLE CHARTS TO DETERMINE A SAFE VFR DEP RTE. I ALSO WOULD THINK IT WOULD BE VERY EASY TO ESTABLISH AN RCO AT FALCON JUST FOR THIS KIND OF INSTANCE. I ALSO DON'T UNDERSTAND WHY; AT THE BEGINNING OF OUR RADIO XMISSIONS TO ATC; THEY COULD NOT HAVE GRANTED ENTRY INTO THE CLASS B AIRSPACE IN LIGHT OF THE TERRAIN. MORE TIME WAS SPENT ON ADMONISHING US THAN TRYING TO HELP US.