The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 2004
Filed:
Jul. 16, 2001
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/18247 ;
U.S. Cl.
CPC ...
H01L 2/18247 ;
Abstract
A method for preventing bit line to bit line leakage in a memory cell is described. In this method, P-implantation is applied to suppress the leakage current induced by the damage, wherein the damage is caused by the etching step for the formation of spacers. The P-implantation step is performed after the etching step, and such a sequence centralizes the implanted ions to prevent them from decreasing the threshold voltage. On the other hand, the P-implantation step is performed after the bit line annealing step to prevent the implanted ions from being thermally diffused.