公开(公告)号：EP1330840A1

公开(公告)日：2003-07-30

申请号：EP01959586.7

申请日：2001-08-06

Applicant: Advanced Micro Devices Inc.

Inventor： HE, Yue-Song ,  HADDAD, Sameer ,  THURGATE, Timothy ,  CHANG, Chi

IPC: H01L21/336 ,  H01L29/788 ,  H01L29/792

CPC classification number: H01L29/66825 ,  H01L29/66833

Abstract: One aspect of the present invention relates to a method of making a flash memory cell (32) involving the steps of providing a substrate (30) having a flash memory cell (32) thereon; forming a self-aligned source mask (48) over the substrate (30), the self aligned source mask (48) having openings (50) corresponding to source lines; implanting a source dopant of a first type (52) in the substrate (30) through the openings (50) in the self-aligned source mask (48) corresponding to source lines; removing the self-aligned source mask (48) from the substrate (30); cleaning the substrate (30); and implanting a medium dosage drain implant of a second type to form a source region (54) and a drain region (56) in the substrate (30) adjacent the flash memory cell (32).