Patent ID: 8470684

Claim:
A semiconductor structure comprising: a semiconductor substrate including a vertical stack, from bottom to top, of at least a semiconductor substrate layer having a doping of a first conductivity type at a first dopant concentration at a lower portion thereof, a first-conductivity-type semiconductor layer having dopants of said first conductivity type at a second dopant concentration greater than said first dopant concentration, and a second-conductivity-type semiconductor layer having a doping of a second conductivity type that is the opposite of said first conductivity type; at least one deep trench capacitor comprising a node dielectric, an inner electrode, and a portion of said second-conductivity-type semiconductor layer, wherein said node dielectric is vertically spaced from said first-conductivity-type semiconductor layer; and a deep isolation trench vertically extending through said second-conductivity-type semiconductor layer and at least partly into said first-conductivity-type semiconductor layer.