Canon Kabushiki Kaisha

Honda Motor Co., Ltd.

Takeshi Terada

Kenji Fujii

Junichi Kobayashi

Shuji Koyama

Yoshinori Tagawa

Jun Yamamuro

Hiroyuki Murayama

Masaki Ohsumi

Taichi Yonemoto

Hiroyuki Abo

Yoshinobu Urayama

Tadanobu Nagami

Masahisa Watanabe

Noriyasu Ozaki

Masato Fukushima

Takayuki Yagi

Makoto Watanabe

Shinichi Koyama

Mitsunori Toshishige

Akihiro Matsuyama

Kinji Takahashi

Kazumichi Tosa

Masashi Seino

Yuu Yamakawa

Motoo Takano

A press die and a processing method of the press die surface, and a manufacturing method of a vehicle body of an automobile, are capable of maintaining a high non-defective product rate of works after press processing, even in a case in which foreign matter such as iron filings and the like have adhered to a die surface. A press die for sheet metal forming has a multitude of concave portions on a die surface, and has a roughness (Ry) of a die surface on which the multitude of concave portions has been formed of 30 to 38 &#x3bc;m.

Press die for metal plate molding, the processing method of the surface of the press die, and manufacturing method of a vehicle body

The present invention provides a method for producing a liquid discharge head including a silicon substrate having, on a first surface, energy generating elements, and a supply port penetrating the substrate from the first surface to a second surface, which is a rear surface of the first surface of the substrate. The method includes the steps of: preparing the silicon substrate having a sacrifice layer at a portion on the first surface where the ink supply port is to be formed and an etching mask layer having a plurality of openings on the second surface, the volume of a portion of the sacrifice layer at a position corresponding to a portion between two adjacent said openings being smaller than the volume of a portion of the sacrifice layer at a position corresponding to the opening; etching the silicon substrate from the plurality of openings and etching the sacrifice layer.

Method for producing liquid discharge head

A liquid ejection head and a method of forming the same. The liquid ejection head includes a substrate, an ejection port, a liquid channel, and a supply port. The substrate has, above one side thereof, an energy generating element configured to generate energy used to eject liquid. The ejection port, from which a liquid is ejected, is located at a position corresponding to the energy generating element. The liquid channel communicates with the ejection port and penetrates the substrate from the one side to another side of the substrate. The supply port communicates with the liquid channel. The substrate has a projecting layer extending inward of an inner peripheral portion of an opening in the supply port in the one side, and the projecting layer and the energy generating element are formed of the same material.

Liquid ejection head and method for manufacturing liquid ejection head

Growing community of inventors

Tokyo, Japan

Takeshi Terada