Canon Kabushiki Kaisha

Mitsubishi Gas Chemical Company, Inc.

Takaaki Yamaguchi

Yoshiyuki Imanaka

Kousuke Kubo

Souta Takeuchi

Takuya Hatsui

Koichi Omata

Muga Mochizuki

Ichiro Saito

Takahiro Matsui

Hideo Tamura

Ryoji Oohashi

Toshio Negishi

Hiroyuki Ishinaga

Masahiko Kubota

Ryoji Inoue

Nobuyuki Hirayama

Yuuji Tamaru

Sadayuki Sugama

Teruo Ozaki

Maki Nishida

Tatsuo Furukawa

Kazunari Fujii

Toshiyasu Sakai

Yuji Tamaru

Yohei Osuki

Suguru Taniguchi

Masao Kato

Jiro Moriyama

Chiaki Muraoka

Mineo Kaneko

Yoshinori Nakajima

Kengo Umeda

Masafumi Wataya

Tomoko Kudo

Yosuke Miura

Hidehiko Kanda

Mineo Shimotsusa

Tetsunobu Kochi

Yasushi Nakano

Kenji Kitabatake

Ryo Kasai

Yoshinori Misumi

Kimiyuki Hayasaki

Masaki Oikawa

Masataka Sakurai

Keiji Tomizawa

Taku Yokozawa

Hiraku Kozuka

Yosuke Takagi

Yuichiro Akama

Kazuaki Shibata

Yukihiro Hayakawa

Souhei Tanaka

Shimpei Yoshikawa

Hiroaki Shirakawa

Masafumi Takimoto

Wataru Endo

Kei Fujita

Yoshihiro Hamada

Hidenori Yamato

Masanori Shibata

Seiko Minami

Takashi Morii

Takamitsu Tokuda

Kazushi Fujimoto

Tokuji Kudo

Yu Nishimura

Sadao Ohtsuka

Kyohei Kubota

Provided is a method for manufacturing a liquid ejection head substrate and a method for manufacturing a liquid ejection head capable of reducing degradation of the quality of a printed image. To this end, in formation of a liquid ejection head substrate, a part required to have more precise relative positional relation or not required to have high fabrication precision is set as a first part, and for the first part, a single-shot exposure method is employed. Also, a part required to have higher fabrication precision is set as a second part, and for the second part, a split exposure method is employed.

Method for manufacturing liquid ejection head substrate and method for manufacturing liquid ejection head

A print element substrate comprises: a plurality of heaters configured to cause discharge of droplets; a pad array in which a plurality of pads configured to do electrical connection from an outside are arranged; and a plurality of resistance monitor elements configured to measure resistance values of the plurality of heaters, wherein the plurality of resistance monitor elements are arranged along a direction of the pad array.

Print element substrate, method of manufacturing print element substrate, and method of manufacturing printhead

There are provided an element board, a liquid ejection head, and a printing apparatus capable of suppressing decrease of the durability of the heating resistor elements. For that purpose, a group of driving electrode pads is shifted from the center of a column of electrode pads toward the side where a heating resistor element located farthest from the group of driving electrode pads exists.

Element board, liquid ejection head, and printing apparatus

A print element substrate, comprises: a heater layer; a wiring layer that is connected to the heater layer and is for causing the heater layer to generate heat; an insulating layer arranged on the wiring layer; an anti-cavitation layer arranged on the insulating layer that is for protecting the insulating layer; and a switch that has a control terminal that is pulled-down to a ground, and causes the anti-cavitation layer and the ground to have an electrical connection when the control terminal is in a high-level state.

Print element substrate, printhead, and printing apparatus

A liquid ejection head includes a substrate including an electrically insulating film, an energy generating element provided on the substrate and configured to generate energy used to eject a liquid, a flow path formed through the substrate and communicating with an ejection port configured to eject a liquid, and a wiring layer formed in the electrically insulating film of the substrate, used to drive the energy generating element, provided apart from a wall defining the flow path, and provided to surround the flow path in a plan view of the substrate.

Liquid ejection head and liquid ejection apparatus

A liquid ejection head includes an energy generating element configured to generate energy used for ejection of a liquid, a print element board including an electroconductive anti-cavitation film provided to cover the energy generating element, and a connection board electrically connected to the anti-cavitation film and including a connection pad electrically connectable from outside.

Liquid ejection head and method for manufacturing the same

An element substrate for a liquid ejecting head includes a substrate, an element forming layer on the substrate, and a discharge port forming member formed of an insulating member on the element forming layer. The element forming layer includes an energy generating element configured to provide energy to a liquid for ejection. The discharge port forming member includes a discharge port forming surface having discharge ports through which the liquid is ejected and an exterior side surface positioned between the discharge port forming surface and the element forming layer. The exterior side surface has a first edge facing the element forming layer. The element substrate further includes a conductive layer disposed between the first edge and the element forming layer and grounded.

Element substrate for liquid ejecting head and wafer

A printing element substrate includes a plurality of printing elements, a first transistor forming an electrical pathway common to the plurality of printing elements, and a plurality of second transistors for driving the plurality of printing elements independently of each other. An electrical pathway is formed between a first power node and a second power node in the order of the first transistor, one of the plurality of printing elements, and one of the plurality of second transistors. The electrical pathway connecting each of the plurality of printing elements and the first transistor includes a plurality of electrical paths.

Printing element substrate, liquid ejection head, and printing apparatus

A recording-element substrate includes a substrate including a base member, a pair of electrodes, a heating element formed of a thermal resistor layer between the electrodes, a surface on which an electroconductive film coating the heating element has been formed, and an insulating film between the heating element and the electroconductive film and a flow-path-forming member including walls forming a liquid flow path toward the heating element while being disposed on the substrate's surface side. The substrate includes an electric connecting portion in contact with the electroconductive film to connect the electroconductive film with the base member. The shortest distance between the electric connecting portion and a portion where an angle formed by the walls is 120 degrees or smaller when viewed from a direction orthogonal to the surface is smaller than that between a boundary between the electrodes and the heating element and the portion.

Recording-element substrate, recording head, and recording apparatus

A semiconductor device for a liquid discharge head is provided. The device includes first transistors configured to receive a first voltage at a first terminal and second transistors configured to receive a second voltage at a first terminal. The device further includes discharge elements configured to discharge a liquid. Each discharge element is connected between a second terminal of a first transistor and a second terminal of a second transistor. A first control circuit is configured to supply a first control signal for controlling a conductive state of the first transistors via a common signal. A stabilization circuit is configured to stabilize a voltage of at least one of the second terminal of the first transistor or the control terminal of the first transistor.

Semiconductor device, liquid discharge head, liquid discharge cartridge, and liquid discharge apparatus

A liquid discharge substrate according to an embodiment of the present invention includes a plurality of heating elements, a plurality of driving elements, a signal supplying unit which supplies a control signal used to control the plurality of driving elements, and a plurality of delay circuits which delay the control signal. A delay amount of a first delay circuit is different from a delay amount of a second delay circuit.

Liquid discharge substrate, liquid discharge head, and printing apparatus

A substrate includes an AND circuit and an LVC. The AND circuit generates a control signal for switching an NMOS transistor. The LVC controls the gate voltage of the NMOS transistor on the basis of the control signal. The substrate applies a constant gate voltage to a PMOS transistor without using the AND circuit and the LVC.

Substrate for liquid ejection head, liquid ejection head, and apparatus and method for ejecting liquid

A liquid discharging substrate comprising discharging units, a first pad arranged on a first side, a second pad arranged on a second side, a signal generating unit arranged between the first pad and the second pad, level shifters, for shifting a level of a signal generated by the signal generating unit to output the signal to the discharging units, arranged between the signal generating unit and the second pad, a first wiring line for supplying the signal generating unit with a first reference voltage received by the first pad, and a second wiring line for supplying the level shifters with the second reference voltage received by the second pad, wherein the first wiring line and the second wiring line are isolated from each other between the signal generating unit and the level shifters in a planar view.

Liquid discharging substrate, printhead, and printing apparatus

A method of manufacturing a liquid-discharge-head substrate is provided, which includes a plurality of elements for discharging liquid, and a heating member for heating the liquid-discharge-head substrate, the method including the steps of preparing a substrate having an insulating layer made of an insulating material provided on or above the substrate, providing a conductive layer made of a conductive material, and forming a conductive line being configured to supply current for driving the element and a part of a heating member by using the conductive layer.

Liquid-discharge-head substrate, method of manufacturing the same, and liquid discharge head

A print head is provided that well preserves ink characteristics upon printing by way of performing effective ink preliminary heating. The print head has heaters and ejection openings formed at locations corresponding to the heaters. Viewed from the side from which ink is ejected, a sub-heater is established in the print head between the ink supply port and the print elements so as to surround the ink supply port.

Liquid ejection head

Growing community of inventors

Yokohama, Japan

Takaaki Yamaguchi