Thank you for your response.
It is a packaging restriction.
actually, IGBT brick is mounted on the heat sink; beside it, I have two small PCBs mounted one above the other, then the Driver board which includes driver mounted the top of the upper board. It is large and covers all heat sink so I need lift it above capacitors etc and consider safe distance between board and capacitor terminals.
The driver connects to the IGBT by 3 wires, since it has fault detection feature. I think a resistor between gate and drain is mandatory.
- - - Updated - - -
SKHI2B has -6V reference. But I am worried about ramping time of gating signal. Also, oscillation and other weird phenomena happen when parasitic inductance and or capacitance exist.