Abstract: The invention is to provide a method for producing a fine structured member and a fine hollow structure, useful for producing a liquid discharge head which is inexpensive, precise and highly reliable, also to provide a method for producing a liquid discharge head utilizing such producing method for the fine structured member and the fine hollow structure and a liquid discharge head obtained by such producing method. A positive-working photosensitive material, including a ternary polymer containing an acrylate ester as a principal component, acrylic acid for thermal crosslinking and a monomer unit for expanding a sensitivity region, is used as a material for forming the Line structured member.

Abstract: A liquid discharge head includes a heater provided on an element substrate, a nozzle including a discharge port portion having a discharge port for discharging a liquid droplet, a bubbling chamber, a supply path for supplying liquid to the bubbling chamber, a supply chamber for supplying the liquid to the nozzle and an orifice substrate. The bubbling chamber includes a first bubbling chamber and a second bubbling chamber above the first bubbling chamber, and the discharge port portion communicates with the second bubbling chamber via a stepped portion. A side wall of the second bubbling chamber converges toward the discharge port with an inclination of 10 to 45 degrees. The nozzle is provided with a control portion including a stepped portion in the flow path near the bubbling chamber. A maximum height of the flow path is smaller than a height of a lower surface of the discharge port portion.

Abstract: The present invention provides a liquid discharge head and a method for manufacturing such a head, in which a discharging speed of a liquid droplet can be increased, a discharging amount of the liquid droplet can be stabilized and discharging efficiency of the liquid droplet can be enhanced.

Abstract: The present invention provides a liquid discharge head and a method for manufacturing such a head, in which a discharging speed of a liquid droplet can be increased, a discharging amount of the liquid droplet can be stabilized and discharging efficiency of the liquid droplet can be enhanced.

Abstract: The present invention discloses a method of producing a liquid flow path shape capable of refilling ink at a high speed by optimizing a three-dimensional shape of the liquid flow path and suppressing the vibration of a meniscus and a head thereof. According to the invention, a pattern to form the liquid flow path to be formed on a substrate with a heater is formed by a positive photosensitive material in a two-layered structure of upper and lower layers, and the lower layer is used for forming the liquid flow path after being thermally crosslinked.

Abstract: A liquid discharge head which is inexpensive, accurate, and highly reliable, and a method of manufacturing such a liquid discharge head are provided. On a substrate, a thermal crosslinking positive photosensitive material layer (a first positive photosensitive material layer) and a second positive photosensitive material layer are formed. First a pattern is formed on the second positive photosensitive material layer, then another pattern is formed on the first positive photosensitive material layer. Next, a negative resin for forming a liquid channel wall is laminated on the patterned first and second positive photosensitive material layers. A discharge port is formed in the negative resin layer and then the positive photosensitive material layers are removed.

Abstract: The invention is to provide a liquid discharge head capable of achieving a higher liquid droplet discharge speed and a more stable discharge amount, thereby improving the discharge efficiency, and a producing method therefor.

Abstract: A liquid discharge head includes a first bubbling chamber, a second bubbling chamber arranged thereon, and a discharge port portion communicated with the second bubbling chamber with a difference in level. The sidewalls of the second bubbling chamber contract in the direction toward the discharge port at an inclination of 10 to 45°. On the circumferential portion of the upper face of the first bubbling chamber in contact with an opening communicated with the second bubbling chamber, an extrusion is formed continuously to surround the opening, in the direction toward the main surface of the element base plate.

Abstract: The present invention discloses a method of producing a liquid flow path shape capable of refilling ink at a high speed by optimizing a three-dimensional shape of the liquid flow path and suppressing the vibration of a meniscus and a head thereof. According to the invention, a pattern to form the liquid flow path to be formed on a substrate with a heater is formed by a positive photosensitive material in a two-layered structure of upper and lower layers, and the lower layer is used for forming the liquid flow path after being thermally crosslinked.

Abstract: The invention is to provide a method for producing a fine structured member and a fine hollow structure, useful for producing a liquid discharge head which is inexpensive, precise and highly reliable, also to provide a method for producing a liquid discharge head utilizing such producing method for the fine structured member and the fine hollow structure and a liquid discharge head obtained by such producing method.

Abstract: A liquid discharge head which is inexpensive, accurate, and highly reliable, and a method of manufacturing such a liquid discharge head are provided. On a substrate, a thermal crosslinking positive photosensitive material layer (a first positive photosensitive material layer) and a second positive photosensitive material layer are formed. First a pattern is formed on the second positive photosensitive material layer, then another pattern is formed on the first positive photosensitive material layer. Next, a negative resin for forming a liquid channel wall is laminated on the patterned first and second positive photosensitive material layers. A discharge port is formed in the negative resin layer and then the positive photosensitive material layers are removed.

Abstract: The invention is to provide a liquid discharge head capable of achieving a higher liquid droplet discharge speed, and a stabler discharge amount thereby improving the discharge efficiency, and a producing method therefor.

Abstract: A liquid discharge head, which comprises heater element base plate provided with the heater and orifice base plate provided with nozzle having discharge port portion with discharge port for discharging liquid droplets, bubbling chamber, and supply path for supply liquid to the bubbling chamber, and supply chamber for supply liquid to the nozzle, is formed by a first bubbling chamber and a second bubbling chamber arranged thereon, and the discharge port portion is communicated with the second bubbling chamber with a difference in level, and the sidewalls of the second bubbling chamber is contracted in the direction toward the discharge port at an inclination of 10 to 45°, and then, on the circumferential portion of the upper face of the first bubbling chamber in contact with the opening communicated with the second bubbling chamber, an extrusion is formed continuously to surround the opening in the direction toward the main surface of the element base plate.

Abstract: The present invention provides a liquid discharge head and a method for manufacturing such a head, in which a discharging speed of a liquid droplet can be increased, a discharging amount of the liquid droplet can be stabilized and discharging efficiency of the liquid droplet can be enhanced.