Canon Kabushiki Kaisha

Kousuke Kubo

Yoshiyuki Imanaka

Takaaki Yamaguchi

Koichi Omata

Takuya Hatsui

Takahiro Matsui

Hideo Tamura

Ryoji Oohashi

Yuuji Tamaru

Toshio Negishi

Yuji Tamaru

Yohei Osuki

Suguru Taniguchi

Jiro Moriyama

Kenji Fujii

Makoto Watanabe

Souta Takeuchi

Muga Mochizuki

Mineo Kaneko

Yoshinori Nakajima

Masafumi Wataya

Kazuaki Shibata

Teruo Ozaki

Mineo Shimotsusa

Hirokazu Komuro

Nobuyuki Hirayama

Shuji Koyama

Ryo Kasai

Masataka Kato

Kazuhiro Asai

Yuzuru Ishida

Tatsuo Furukawa

Yoshinori Tagawa

Hiraku Kozuka

Yukihiro Hayakawa

Souhei Tanaka

Ryoji Kanri

Makoto Terui

Kazuhiro Hayakawa

Takeru Yasuda

Masafumi Takimoto

Kei Fujita

Tomoko Kudo

Tsubasa Funabashi

Takashi Morii

The liquid ejection head includes a plurality of element substrates including first and second element substrates and an electrical wiring substrate. The first and second element substrates each has a heating element array in which a plurality of heating elements producing heat energy for liquid ejection is arrayed, an electrically conductive protection layer covering the plurality of heating elements, an insulating layer arranged between the plurality of heating elements and the electrically conductive protection layer, and a connecting terminal for connecting to the outside. The electrical wiring substrate is electrically connected with the first and second element substrates via the connecting terminal. On the first and second element substrates, the connecting terminal includes a connecting terminal for the electrically conductive protection layer, and the electrically conductive protection layer is electrically connected to a common wiring provided on the electrical wiring substrate via the connecting terminal.

Liquid ejection head and manufacturing method thereof

A recording element board has a plurality of heat-generating resistor elements arranged in a row and each of the plurality of heat-generating resistor elements comprises a heat-generating resistor layer and first and second pairs of electrodes connected to the heat-generating resistor layer. The first and second pairs of electrodes contact the heat-generating resistor layer at the opposite surfaces thereof to each other. The first pair of electrodes is formed as vias, while each surface of the second pair of electrodes is inclined so as to gradually reduce the thickness thereof toward the end thereof.

Recording element board, liquid ejection apparatus and method of manufacturing recording element board

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

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 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

When protective portions are independently provided for each energy generation element, a leakage current inspection between the protective portions and the energy generation elements cannot be performed at once. Therefore, there is a concern that the inspection in manufacturing a substrate for liquid ejection head requires time. Therefore, the substrate for liquid ejection head is manufactured by performing a leakage current inspection between a connecting portion that is electrically connected to plurality of protective portions and a terminal to which the plurality of energy generation elements are connected, and thereafter removing the connecting portion.

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

An element substrate capable of independently confirming an electrical connection status with a logic power source without increasing costs due to increasing the number of terminals or the like. The element substrate includes a connection status output circuit that outputs a signal in response to a connection status of a logic power source input terminal, or a connection status of input terminals of each of a print signal, a clock signal, a drive signal, and a latch signal, and a connection status output terminal that outputs an output signal from the connection status output circuit.

Element substrate, printhead, head cartridge, printing apparatus, and method for confirming electrical connection status of printhead and printing apparatus

A liquid-discharging recording head includes first and second substrates each having an energy generating element and a supply port, and a support member on which the substrates are arranged. The first substrate is provided on one side in a longitudinal direction of the support member, and the second substrate is provided on an other side in the longitudinal direction of the support member. A driving circuit configured to drive the energy generating element is provided in a larger region between an end of a supply port in the first substrate on the other side in the longitudinal direction and an end of the first substrate on the other side and in a larger region between an end of a supply port in the second substrate on the one side in the longitudinal direction and an end of the second substrate on the one side.

Liquid-discharging recording head

A liquid discharge head includes a heat accumulation layer provided on a board, an energy generation element configured to generate energy to discharge liquid from a discharge port and including a heat generation resistor layer provided on the heat accumulation layer and formed of a material configured to generate heat through supply of electricity and a pair of electrodes connected to the heat generation resistor layer, and an insulation layer including a silicon compound and provided so as to cover the energy generation element, and a line formed of a metal material provided between the heat accumulation layer and the insulation layer, and in at least a portion at a position closer to a flow path than the energy generation element.

Substrate including a detection feature for liquid discharge head and liquid discharge head

A liquid discharge head includes a substrate and a flow path wall member provided on the substrate and having a wall defining a flow path connected to a discharge port for discharging liquid. The flow path wall member is provided with a cavity not connected to the flow path, when viewed in a direction from the discharge port toward the substrate, the cavity has a shape of a character, and the character corresponds to information regarding the liquid discharge head.

Liquid discharge head and method for manufacturing the same

An inkjet printhead substrate includes: a heat generating element configured to generate energy for ejecting ink; an electric wire electrically connecting the heat generating element and an electrode lead provided on a flexible film wiring substrate; a protecting film configured to protect the electric wire; an electrode pad to which the electrode lead is connected, the electrode pad being formed by providing an opening in the protecting film at a position above the electric wire; a region to which a sealing resin configured to protect an electrically connected portion of the electrode pad and the electrode lead is to be applied; and an ink-detecting electrode composed of a metal wire and formed at the region to which the sealing resin is to be applied. The metal wire has a smaller width than an opening provided in the protecting film from which the metal wire is exposed.

Inkjet printhead substrate, method for manufacturing inkjet printhead substrate, inkjet print head, and inkjet recording apparatus

The present invention prevents an element substrate from not operating normally in the case where the voltage supply from a power supply that applies a voltage to a logic circuit is unstable. The element substrate of the invention has unit for applying a first voltage to the logic circuit, and unit capable of applying a second voltage that is lower than the first voltage and capable of operating the logic circuit.

Element substrate, printhead, head cartridge, and printing apparatus

An inkjet recording head includes a connection-state output circuit provided on the recording element substrate of a recording head, where the connection-state output circuit externally transmits data of the connection state of each of input signal ends. An output from the connection-state output circuit is activated when the same logic as that used when signals are pulled up and/or pulled down is used.

Inkjet recording head and recording apparatus

This invention is directed to a print element substrate including a plurality of print element arrays in which different numbers of print elements are arranged. The print element substrate can efficiently transfer data to each print element and efficiently lay out circuits. The print element substrate includes the following arrangement. More specifically, a first print element array having a relatively large number of print elements, and a plurality of second print element arrays which are equal in length to the first print element array and smaller in the number of print elements than the first print element array are juxtaposed. The print element substrate includes one shift register which holds data for driving the print elements of the first print element array, and one shift register which holds data for driving the print elements of the second print element arrays.

Growing community of inventors

Yokohama, Japan

Kousuke Kubo