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:
Oct. 29, 2002
Filed:
Feb. 20, 2002
Applicant:
Inventors:
Assignee:
Kabushikikaisha Kojundokagaku Kenyusho, Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 9/94 ;
U.S. Cl.
CPC ...
C07F 9/94 ;
Abstract
This invention provides a process for producing bismuth tertiary amyloxide which is a starting material for forming a ferroelectric film such as SrBi Ta O containing bismuth oxide, or an oxide superconductive film such as Bi Sr CaCu O , by the CVD method or sol-gel method. This process comprises reacting bismuth bromide with sodium tertiary amyloxide or potassium tertiaryamyloxide in a toluene solvent containing 5 to 30 weight % tetrahydrofuran, then separating a byproduct sodium bromide or potassium bromide by filtration and recovering bismuth tertiary amyloxide by distillation under reduced pressure.