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:
Nov. 23, 2004
Filed:
May. 13, 2002
Yasushi Karasawa, Suwa, JP;
Mitsuro Atobe, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A porous structure in which water repellency can be kept for a long term; an inkjet recording head in which the nozzle surface is superior in water repellency properties, and high printing quality can be maintained for a long term; a method of manufacturing such a porous structure and such an ink-jet recording head; and an ink-jet recording apparatus provided with such an ink-jet recording head. In a porous structure ( ), recess portions ( ) and protrusion portions ( ) are formed on the surface of a substrate of the porous structure. The height of the protrusion portions ( ) on the surface of the substrate is uniform. In addition, the recess portions ( ) and the protrusion portions ( ) are formed to have such a size that a liquid drop ( ) does not fall down into the recess portion ( ), and can contact with an air layer ( ) in the recess portion ( ). The porous structure ( ) is adopted in the ink ejecting surface except for ink ejecting holes in an ink-jet recording head. The ink-jet recording head is mounted on an ink-jet recording apparatus.