Patent ID: 6271067
Filing Date: 2001-08-07
Classification: H01L

Abstract:
A method of forming a field effect transistor comprising:providing a semiconductive substrate;forming a field effect transistor having a p-type body within the substrate, the transistor having a gate, the p-type body including a p+ contact thereto;forming a voltage divider circuit over the substrate and connected with the gate, the p-type body, and a reference voltage node, forming the voltage divider circuit comprising:forming a first diode having a first anode coupled to the gate and a first cathode;forming a second diode having a second cathode coupled to the first cathode and a second anode coupled to the p+ contact;forming a third diode having a third anode coupled to the p+ contact and a third cathode; andforming a fourth diode having a fourth anode coupled to the reference voltage node and a fourth cathode coupled to the third cathode, the voltage divider circuit being configured to selectively change a threshold voltage of the field effect transistor when a gate voltage of the field effect transistor changes from high to low, and vice versa.