| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid-repellency increasing structure exhibiting a liquid-repellency nature against liquids of their surface tensions being less than a water such as organic solvents, oils or liquids with the surface tension of 40 mN/m or less and manufacturing method for the same, and to provide a liquid ejection head enabling the liquids whose surface tension is less than a water such as the organic solvents, oils or liquids with the surface tension of 40 mN/m or less to be stably ejected, and a stain-resistant film for stain prevention. SOLUTION: The liquid-repellency increasing structure utilizes a substrate which exhibits a lyophilic nature on a flat surface against the liquids whose surface tensions are less than a water, and comprises the substrate consisting of a metal, alloy or insulating member, an oxide film on anode formed on the substrate surface and provided with many holes, and a liquid-repellency layer which is formed so as to cover the oxide film on anode and formed of a liquid-repellency material including a fluorine. The thickness of the liquid-repellency layer is not more than the half of the hole diameter. COPYRIGHT: (C)2006,JPO&NCIPI
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