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:
Mar. 08, 2011
Filed:
Jan. 30, 2008
Kazuya Abe, Oita, JP;
Kenji Ono, Tokyo, JP;
Toshiyasu Sakai, Kawasaki, JP;
Hiroyuki Abo, Chigasaki, JP;
Noriyasu Ozaki, Atsugi, JP;
Mitsuru Chida, Yokohama, JP;
Kazuya Abe, Oita, JP;
Kenji Ono, Tokyo, JP;
Toshiyasu Sakai, Kawasaki, JP;
Hiroyuki Abo, Chigasaki, JP;
Noriyasu Ozaki, Atsugi, JP;
Mitsuru Chida, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides an ink jet recording head which includes a substrate, an energy generating element which is disposed on the substrate and generates energy for discharging a liquid, an electrode which is disposed on the substrate and is electrically connected to the energy generating element, a passage-forming member which is disposed on the substrate, an adhesion layer which is disposed on the substrate and facilitates adhesion between the passage-forming member and the substrate, and a bump disposed on the electrode. The area of an upper surface of the bump is larger than the area of a lower surface of the bump, the lower surface being located on the substrate side, the upper surface being located opposite the lower surface, and a side face of the bump is covered with the adhesion layer. Thereby, a protective film is formed around the bump.