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:
May. 01, 2007
Filed:
Jun. 04, 2004
Jirou Miura, Kawasaki, JP;
Mitsushi Fujiki, Kawasaki, JP;
Aki Dote, Kawasaki, JP;
Tomohiro Takamatsu, Kawasaki, JP;
Jirou Miura, Kawasaki, JP;
Mitsushi Fujiki, Kawasaki, JP;
Aki Dote, Kawasaki, JP;
Tomohiro Takamatsu, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An interlayer insulating film covering a ferroelectric capacitor is formed, and through the interlayer insulating film, contact holes each reaching a capacitor electrode are formed. A wiring connected to the capacitor electrode through the contact hole is further formed above the interlayer insulating film. A planar shape of the contact hole is a regular octagon, a regular rectangle with four angles thereof being rounded, an octagon with a length of each neighboring side thereof being different to each other, a circle, and so forth.