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:
Sep. 22, 2009
Filed:
Mar. 28, 2007
Osamu Tonomura, Kokubunji, JP;
Osamu Tonomura, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An object of the present invention is to provide a method of depositing yttrium-stabilized hafnia use for a DRAM capacitor insulating film while controlling the composition at a high accuracy by an atomic layer deposition method. The atomic deposition method is performed by introducing a hafnium compound precursor, introducing a yttrium compound precursor and introducing an oxidant as one cycle. In the atomic deposition method, the addition amount of yttrium into hafnia is controlled accurately by controlling the time of introducing the hafnium compound precursor and the yttrium compound precursor and controlling the replacement ratio of OH groups on a sample surface by each of the precursors.