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. 27, 2003
Filed:
Aug. 27, 2001
Kunihiro Yamanaka, Kanagawa, JP;
Kaihei Isshiki, Tokyo, JP;
Shuya Abe, Hyogo, JP;
Kouji Ohnishi, Hyogo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An ink-jet head includes a nozzle which discharges an ink drop to a recording medium. A discharging chamber communicates with the nozzle and contains ink therein. An oscillation plate is provided on a first substrate of silicon, the oscillation plate defining a bottom surface of the discharging chamber, the oscillation plate pressurizing the ink in the discharging chamber when the oscillation plate is actuated. An electrode is provided on a second substrate of silicon, the electrode facing the oscillation plate via a gap between the oscillation plate and the electrode. In the ink-jet head, at least one of a first bonding area of the first substrate and a second bonding area of the second substrate is provided with a silicon oxide film, and the silicon oxide film contains boron on a surface thereof where the first substrate and the second substrate are bonded together.