Newbie level 6
I have a chip that has 68 pins at 1 mm spacing (SIM900). I know it is not a really tight package but I have some problems with shorts between pins when I am hot air reflowing. Anyway my thought was that I only use probably 15 of the 68 pins so what if I designed my PCB to not have pads for the pins I don't use. If there aren't so many pads I will have a smaller chance of shorting. I use pads from all 4 sides so I figure it will be fixed down well.