公开(公告)号：WO2018093441A1

公开(公告)日：2018-05-24

申请号：PCT/US2017049723

申请日：2017-08-31

Applicant: SANDISK TECHNOLOGIES LLC

Inventor： KAI JAMES ,  CHOWDHURY MURSHED ,  LIU JIN ,  ALSMEIER JOHANN

IPC: H01L27/11565 ,  H01L27/1157 ,  H01L27/11582

CPC classification number: H01L27/11582 ,  H01L21/02164 ,  H01L21/0217 ,  H01L21/02178 ,  H01L21/02181 ,  H01L21/02183 ,  H01L21/02186 ,  H01L21/02189 ,  H01L21/02192 ,  H01L21/02494 ,  H01L21/02587 ,  H01L21/31116 ,  H01L21/31144 ,  H01L21/76805 ,  H01L21/76877 ,  H01L27/11519 ,  H01L27/11524 ,  H01L27/11556 ,  H01L27/11565 ,  H01L27/1157 ,  H01L29/41741 ,  H01L29/42324 ,  H01L29/4234 ,  H01L29/512 ,  H01L29/518

Abstract: A three-dimensional memory device including self-aligned drain select level electrodes is provided. Memory stack structures extend through an alternating stack of insulating layers and spacer material layers. Each of the memory stack structures includes a memory film and a memory level channel portion. Drain select level channel portions are formed over the memory level channel portions with respective lateral shifts with respect to underlying memory stack structures. The direction of lateral shifts alternates from row to row for each row of drain select level channel portions. Drain select level gate dielectrics and drain select level gate electrodes are formed on the drain select level channel portions. Each drain select level gate electrode controls two rows of drain select level channel portions, and is laterally spaced from neighboring drain select level gate electrodes.