Patent ID: 6949427

Claim:
A method of forming a capacitor structure, comprising: forming a container construction comprising a first silicon-containing layer around a second silicon-containing layer; the first silicon-containing layer being more heavily doped with conductivity-enhancing dopant than the second silicon-containing layer; the second silicon-containing layer defining an exposed inner periphery of the container and the first silicon-containing layer defining an exposed outer periphery of the container; converting at least some of each of the first and second silicon-containing layers to hemispherical grain silicon; the hemispherical grain silicon from the first silicon-containing layer having a smaller average grain size than the hemispherical grain silicon from the second silicon-containing layer; forming a dielectric material along the exposed inner and exposed outer peripheries of the container construction, the dielectric material being in direct physical contact with the second silicon-containing layer of the inner periphery and in direct physical contact with the first silicon-containing layer of the outer periphery; and forming a conductive material over the dielectric material; the container construction, dielectric material and conductive material together defining at least part of the capacitor structure.