Patent ID: 7132708
Filing Date: 2006-11-07
Classification: H01L

Abstract:
1. A semiconductor memory device having a plurality of self-aligned contacts comprising: a plurality of active regions, each active region horizontally extended to a predetermined length at a surface of a semiconductor substrate, separated from one another in a row at a predetermined interval and arranged to be shifted to a half cycle with a neighboring row; a plurality of gate electrode patterns, a pair of the gate electrode patterns arranged in parallel on the semiconductor substrate, perpendicular to the extended direction of each of the active regions, and having a plurality of first spacers along a plurality of sidewalls of the gate electrode patterns; a first interdielectric layer formed on an entire surface of a resultant in which the first spacers are formed; a plurality of bit line patterns arranged in parallel on the first interdielectric layer, perpendicular to the gate electrode patterns, and having a plurality of second spacers along the sidewalls of the bit line patterns; a plurality of contacts for bit lines, which are formed between the pair of the gate electrode patterns for each of the active regions and self-aligned with the first spacers, for electrically connecting the active regions to the bit line patterns; a second interdielectric layer formed on an entire surface of the first interdielectric layer in which the bit line patterns are formed; and a plurality of storage electrodes including contacts formed on each outer end of the pair of the gate electrode patterns for each of the active regions and simultaneously self-aligned with the second and first spacers, for electrically connecting the active regions to storage electrodes of a capacitor, wherein each contact for a storage electrode is arranged offset with respect to the pair of the gate electrode patterns on which the contact for the storage electrode is formed so as to increase a spaced-apart distance between a corresponding contact for a bit line and the contact for the storage electrode.