I have a PCB that is the test vehicle for an IC that is of SO-8 package. There's an SO-8 footprint on the PCB and you can solder the IC directly onto that footprint. Besides that, the PCB offers an alternative way for mounting the IC. It appears to be some kind of test socket that you can solder onto the PCB because there's a mounting hole half an inch removed from each corner of the SO-8 footprint. Shape of solder mask around the footprint also suggests such a test socket. However, other than the four mounting holes and the SO-8 footprint itself, there's no other holes nearby for the pins of a typical SO-8 test socket. It appears that the special test socket works by pressing the IC down directly against the SO-8 footprint on the board. Does anyone know what this special test socket might be called? Who makes such sockets? Any help is appreciated!