Patent ID: 8105497

Claim:
A method for fabricating a cylinder type capacitor, comprising: forming connection contacts passing through a lower layer over a semiconductor substrate; forming a mold layer covering the connection contacts; forming a first floated pinning layer with a stress in a first direction over the mold layer; forming a second floated pinning layer for stress relief with a stress in a second direction over the first floated pinning layer, the second direction being opposite to the first direction; forming opening holes passing through the first and second floated pinning layers and the mold layer to expose the connection contacts; forming storage nodes following a profile of the opening holes; removing portions of the first and second floated pinning layers to form a floated pinning layer pattern, the floated pinning layer pattern exposing a portion of the mold layer and contacting upper tips of the storage nodes; exposing outer walls of the storage nodes by selectively removing the exposed mold layer; and forming a dielectric layer and an upper electrode over the storage node.