Patent ID: 7514755

Claim:
A circuit comprising: a camouflaged circuit structure having a gate region, including: a substrate; a first active region of a first conductivity type being disposed in said substrate; a second active region of a first conductivity type being disposed in said substrate; and a first well of said first conductivity type being disposed in said substrate under said gate region, said first well being in physical contact with said first active region and said second active region, wherein said first well provides an electrical path between said first and second active regions regardless of any reasonable voltage applied to said circuit; wherein said first well is generally deeper than said first and second active regions; the circuit further comprising a circuit structure having: a second well of the first conductivity type being disposed in said substrate; and third and fourth active regions of a second conductivity type being disposed in said second well and on opposite sides of a gate region; wherein said first well and said second well have a same depth and a same doping.