Large Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 10
Situational Awareness
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance
Airspace Structure; Manuals; Procedure
Aircraft X departed SJC on the TECKY 3 Departure. That departure has the aircraft fly runway heading to 1.8 DME then a climbing right turn to NEVSE at 5000. About 90% of SJC departures fly this procedure. The second aircraft; Aircraft Y; was a departure to SFO which would be issued runway heading up to 3000. This is also standard for any IFR departure not on a SID. Aircraft X departed; and executed the departure with no further input from myself. SJC then departed Aircraft Y; 5 miles in trail runway heading to 3000; which is their requirement by LOA. I left Aircraft Y on runway heading but climbed him to 5000; as there are terrain issues in this area and 3000 is not a good altitude for very long. This essentially turns Aircraft Y into an aircraft that is flying one of the departure procedures. Aircraft X made a sharper right turn than most aircraft and climbed slowly; while Aircraft Y climbed quickly. When Aircraft X was established SE bound; he was at 3800 while Aircraft Y was climbing out of 3000 on the parallel NW runway heading. The two aircraft were 1.8 miles apart when they passed each other. There are no restrictions for the right turn on the TECKY 3 Departure that ensure separation from subsequent departures; and a loss of standard separation most likely occurs multiple times per day on this sector. I believe the only reason this incident was even brought to my attention; was because it was less than 66%; whereas other losses for the day are in the 75-95% range.Recommend some sort of intermediate restriction for the right turn for TECKY 3 and LOUPE 4 Departures off SJC to ensure that they will stay 3 miles from SJC airport would help prevent this from happening.
NCT TRACON Controller reported in trail departures from SJC on different procedures passed with less than the required lateral separation. This is a recurring issue at this sector.