Generally when I build stuff on a PCB I create a small legend with a circle for pin 1 and I use this to manually orient the IC. I was watching a couple of youtube videos on automated pick and place SMT assembly , and was curious as to whether there is any other file which specifies the orientation of the device. As far as I know I have only heard of gerbers and a BOM file. Is there an extra file which needs to be supplied to a PCB house for handling orientation for IC's as well as other devices(like tantalum capacitors etc)
Yes there is, it's called a "Pick & Place File". It specifies the component position, pad references, layer, and rotation (among other specifications) for placement. Below is a snippet of the P&P file for a board I did recently:
Designator Footprint Mid X Mid Y Ref X Ref Y Pad X Pad Y TB Rotation Comment R1 RESC3225M_1210_KOA-SPEER 36.44mm 7.649mm 36.44mm 7.649mm 36.44mm 6.099mm T 90.00 3.3 C7 CAPC1608M_0603_MURATA 26.7462mm -1.568mm 26.7462mm -1.567mm 26.7462mm -0.768mm B 270.00 0.1 uF C8 CAPC1608M_0603_MURATA 25.273mm -1.566mm 25.273mm -1.567mm 25.273mm -2.366mm B 90.00 0.001uF C2 CAPC2012M_0805_TDK 41.635mm 8.746mm 41.635mm 8.746mm 42.935mm 8.746mm T 180.00 0.15uF C1 CAPC3216M_1206_TDK 38.945mm 20.006mm 38.945mm 20.006mm 37.145mm 20.006mm T 360.00 1.5uF C4 CAPC1608M_0603_MURATA 26.7565mm 9.1188mm 26.7565mm 9.1178mm 26.7565mm 8.3188mm B 90.00 0.1 uF C5 CAPC1608M_0603_MURATA 25.259mm 9.099mm 25.259mm 9.098mm 25.259mm 8.299mm B 90.00 0.001uF C13 CAPC1608M_0603_MURATA 15.351mm -7.9714mm 15.351mm -7.9724mm 15.351mm -8.7714mm B 90.00 0.1 uF C12 CAPC1608M_0603_MURATA 16.834mm -7.9684mm 16.834mm -7.9694mm 16.834mm -8.7684mm B 90.00 0.001uF
You can see that it calls out the rotation of the component in one of the last columns.