Patent ID: 6303955
Filing Date: 2001-10-16
Classification: H01L,Y10S

Abstract:
A capacitor over bit line (COB) structure of a dynamic random access memory with slanted active regions, comprising:a plurality of slanted active regions on a substrate, each of said slanted active regions having a center node region and a first straight-arm region and a second straight-arm region that are arranged in quasi-S-shape, said center node regions are arranged in lines, said first and said second straight-arm regions are perpendicularly lying in an opposite direction of said lines of said center node regions, and said first straight-arm regions of said one line of said center node regions and said second straight-arm regions of said next line of said center node regions are alternatively and parallel arranged;a plurality of parallel word lines on said substrate that perpendicularly cross said first and said second straight-arm regions of said slanted active regions;a plurality of bit line contacts on said center node regions of said slanted active regions;a plurality of parallel bit lines over said substrate and said word lines, said bit lines are located between said first and said second straight-arm regions that are contiguous and completely cover said bit line contacts;a plurality of insulating spacers on sidewalls of said bit lines; anda plurality of crown-type capacitors located between said insulating spacers that are adjacent and between said bit line contacts.