Patent ID: 8067286

Claim:
A method of forming recessed access devices, comprising: forming recessed access device channels extending into a semiconductor substrate; filling the recessed access device channels with a first electrically insulative material; patterning the first electrically insulative material into a mask defining a plurality of access device regions, the access device regions being islands surrounded by an isolation region; the access device regions comprising only portions of the recessed access device channels; etching into the substrate of said isolation region to form a trench within the isolation region; after forming the trench, covering the substrate with an electrically insulative laminate comprising silicon dioxide over silicon nitride; the laminate filling the isolation region trench; removing the first electrically insulative material to reopen the recessed access device channels while leaving the electrically insulative laminate within the isolation region trench; and forming gate material within the re-opened recessed access device channels.