| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly reliable liquid ejection head which suppresses development of cracks and which has satisfactory heat cycle resistance, and a method of manufacturing the same.SOLUTION: A liquid ejection head includes: a chip including a substrate including an energy generating element, an ejection orifice member and an electrode terminal; an electric wiring board including lead wiring; a support for supporting the electric wiring board, and having an opening which surrounds the chip; a chip periphery sealing member which fills a gap between the chip and the opening; and an electrically connecting portion sealing member which is disposed in contact with the chip periphery sealing member and which covers an electrically connecting portion between the chip and the electric wiring board. The electrically connecting portion sealing member is a cured product of a material containing a filler. The chip periphery sealing member is a cured product of a material containing at least one kind of a polyether-modified polydimethylsiloxane, a polyester-modified polydimethylsiloxane, and an aralkyl-modified polymethylalkylsiloxane. The chip periphery sealing member and the electrically connecting portion sealing member have a difference in coefficient of linear expansion of 50 ppm/°C, or more. A method for manufacturing the same is provided. |
