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:
Jan. 02, 2007
Filed:
Jun. 24, 2004
Masami Murai, Nagano-ken, JP;
Miyuki Muramoto, Nagano-ken, JP;
Takeshi Yasoshima, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A lower electrode, which partially constitutes a piezoelectric element, is patterned such that at least one end face thereof is located in a region facing a corresponding pressure generating chamber. A piezoelectric layer includes a plurality of layers of ferroelectric films. A first ferroelectric film, which is a lowermost layer of the plurality of layers of ferroelectric films, is provided only on the lower electrode such that an end face thereof is aligned with the end face of the lower electrode. The end face of the first ferroelectric film and the end face of the lower electrode are sloped at an angle of 10° to 50° with respect to a vibration plate. Other ferroelectric films formed on the first ferroelectric film are provided in such a manner as to overlie the sloped end face of the lower electrode and the sloped end face of the first ferroelectric film.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile