Air Traffic Control Fully Certified
Time Pressure; Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance; Flight Crew Requested ATC Assistance / Clarification
Human Factors; Procedure
Aircraft X was ready Runway 28L and I had a regional jet ready to depart the parallel and I looked at Aircraft's strip noticing he was going ZZZ. That is north and cleared him for takeoff and told him to proceed on course. I waited until Aircraft X was about departure end and cleared the regional jet for takeoff and told him the upwind traffic will be in a right hand turn. Aircraft X started his turn and I thought nothing of it and shipped him to Departure then shipped the regional jet to Departure. Then the Radar Controller made us aware that he had taken corrective action because Aircraft X was not VFR as I had mistakenly thought.  He was IFR and was not turned within the DVA (Diverse Vector Area). This may have caused a loss of separation with the MVA (Minimum Vectoring Altitude). The only reason I bring up the regional jet is because getting Aircraft X going and out of the way contributed to me making a quick judgment to turn Aircraft X on course. Aircraft X ended up telling Radar that he had the terrain and wanted a VFR climb.I will be more diligent in the future to notice the full strip indicating IFR and not be trapped by the single fix flight plan as being VFR. The vast majority of IFR flight plans at BOI get a PDR (Preferred Departure Routing) so the strips have a look to them and it can trick you if you aren't careful when you get one that is ZZZ [destination] for a route on the strip. The half strip for VFR aircraft is relatively new in our order and maybe I just haven't adjusted yet.  I don't recommend any change it was my mistake and I won't make it again.
BOI Tower Controller reported issuing an IFR BE20 a turn; not in compliance with Minimum Vectoring Altitude procedures.