Patent ID: 8009011

Claim:
An electrically adjustable resistor comprising: a substrate; an adjustment region comprising a portion of the substrate doped with ions; a primary dielectric layer disposed on top of the substrate and in contact with the adjustment region, the primary dielectric layer including a first hole adapted to receive a first metal contact and a second hole adapted to receive a second metal contact, wherein the first and second metal contacts are each electrically connected to the adjustment region; a voltage source electrically connected between the first metal contact and the second metal contact such that a voltage is applied across the adjustment region; and a polysilicon resistive layer deposited on top of the primary dielectric layer and situated above the adjustment region and between the first and second metal contacts; wherein the polysilicon resistive layer is adapted to act as a variable resistor, a resistance of the variable resistor being adjusted by varying the voltage applied across the adjustment region by the voltage source.