A new method to form an integrated circuit device is achieved. The method comprises
forming a dielectric layer overlying a semiconductor substrate. An intrinsic semiconductor
layer is formed overlying the dielectric layer. The intrinsic semiconductor layer
is patterned. A p+ region is formed in the intrinsic semiconductor layer. An n+
region is formed in the intrinsic semiconductor layer. The p+ region and said n+
region are laterally separated by an intrinsic region to thereby form a PIN diode
device. A source region and a drain region are formed in the semiconductor substrate
to thereby complete a MOSFET device. The PIN diode device is a gate electrode for
the MOSFET device.