Canon Kabushiki Kaisha

Nec Corporation

Renesas Electronics Corporation

Kazuaki Masuda

Hiroshi Sugitani

Akio Saito

Masami Ikeda

Toshio Kashino

Hiroyuki Ishinaga

Tsuyoshi Orikasa

Teruo Arashima

Jun Kawai

Yoshifumi Hattori

Asao Saito

Takashi Watanabe

Yuji Kamiyama

Seiichiro Karita

Makiko Kimura

Kunihiko Maeoka

Akira Goto

Tsutomu Abe

Nobuyuki Kuwabara

Hideo Saikawa

Masaaki Izumida

Hiroshi Nakagomi

Masahiko Higuma

Yoichi Taneya

Masami Kasamoto

Hajime Kaneko

Shigeaki Tanaka

Torachika Osada

Yohei Sato

Takashi Ohba

Osamu Sato

Eiichiro Shimizu

Shuji Koyama

Takashi Saito

Tokuya Ohta

Hajime Yamamoto

Junji Shimoda

Shigeo Toganoh

Jun Hinami

Koichi Sato

Tsuguhiro Fukuda

Yasuo Kotaki

Hiroshi Tajika

Wataru Takahashi

Noribumi Koitabashi

Kentaro Yano

Akio Suzuki

Masahiko Kubota

Hitoshi Sugimoto

Hiromichi Noguchi

Miyuki Matsubara

Haruo Uchida

Yoshinori Misumi

Yoshiaki Takayanagi

Tatsuo Furukawa

Kazuyoshi Takahashi

Keiichi Murai

Mitsuru Kurata

Hiroaki Mihara

Masako Shimomura

Hiroyuki Maru

Manabu Sueoka

Fumio Murooka

Motoaki Sato

Yoshiyuki Imanaka

Ichiro Saito

Seiji Suzuki

Teruo Ozaki

Kiyomitsu Kudo

Toshiaki Nagashima

Hiroki Tajima

Masahiko Ogawa

Masashi Miyagawa

Takeshi Okazaki

Akihiro Yamanaka

Akihiko Shimomura

Minoru Nozawa

Tomoyuki Hiroki

Masaru Iketani

Hiroyuki Sugiyama

Masanori Takenouchi

Hirokazu Komuro

Aya Yoshihira

Takayuki Ono

Keisuke Matsuo

Toshihiro Mori

Genji Inada

Ken Ikegame

Hideki Kawai

Masasumi Nagashima

Masashi Kitani

Naohito Asai

Atsushi Shiozaki

Satoshi Shimazu

Masaki Inaba

Kenji Aono

Yasuhiro Unosawa

Tetsuo Kimura

Masaaki Okada

A memory controller coupled to a DRAM includes a delay control section including a delay holding section, and coupled to the DRAM to output a delay set value to the DRAM and a delay adjustment section coupled to the DRAM to receive data from the DRAM, and to arrange a delay amount of the received data based on the delay set value. The delay set value is stored in both the delay holding section of the memory controller and the DRAM.

Memory controller, system including the controller, and memory delay amount control method

A memory controller transmits and receives data to and from a memory. The memory controller includes a delay control section deciding a set value indicative of a determined delay amount in response to a result of a comparison between a test data transmitted to the memory and test data received from the memory, and transmitting the decided set value to the memory, a taking-in section receiving the set value stored in the memory, and a delay adjustment section receiving data from the memory, and arranging a delay amount of the received data in response to the set value received by the taking-in section.

An adsorbent for ink jet use arranged in a position to be in contact with ink, having the higher capability of adsorption with respect to hydrophobic substance contained in ink than colorant therein. Then, an ink retaining container comprises an ink retaining portion for retaining ink to be supplied to an ink jet head, an ink supply opening which becomes the ink supply portion from the ink retaining portion to the head, an atmospheric communication opening for communicating the ink retaining portion with the air outside. This ink retaining container is provided with the above-mentioned adsorption member arranged in a position to be in contact with ink in it. With the adsorbent and the ink retaining container thus arranged, it is made possible to perform ink jet recording with excellent print characteristics by effectively removing the hydrophobic substance eluted form the ink absorbent in the ink retaining container.

Adsorbent for ink jet use, an ink retaining container, an adsorption member using such an adsorbent, an ink supply system having such adsorption member, and an ink jet recording apparatus

A liquid discharge head is provided with discharge ports for discharging liquid, liquid flow paths communicated with the discharge ports for supplying liquid to the discharge ports, a substrate having heat generating members for creating bubbles in the liquid, and movable members facing the heat generating members and being arranged in the liquid flow paths. The movable members have a free end on the discharge port side with a specific gap with respect to the heat generating members. The movable member is fixed to the substrate above the heat generating member on the substrate.

Liquid discharge head, a substrate for use of such head and a method of manufacture therefor

A semiconductor device and a method for testing the semiconductor device of the present invention includes n macro blocks which process input data supplied from input terminals and output the data from output terminals, a test circuit which supplies test data for testing the macro blocks and receives the test data processed by the macro blocks in the test mode and a test path which supplies the test data from the test circuit to the input terminal of the macro block, supplies data of the output terminal of the k-th (k&equals;1 to (n&minus;1)) macro block to the input terminal of the macro block to the test circuit in the test mode. One macro block can be selected randomly to be tested.

Semiconductor device with a self-testing function and a method for testing the semiconductor device

Adsorbent for ink jet use, an ink retaining container, an adsorption member using such adsorbent, an ink supply system having such adsorption member, and an ink jet recording apparatus

An ink-jet ink cartridge having an ink containing portion for containing the ink to be supplied to an ink-jet head, and a lid for covering the ink containing portion, characterized in that a wall of the ink containing portion and one face of the lid are welded together owing to frictional heat by vibration.

Ink tank cartridge, a manufacturing method thereof and a packaging structure of the ink tank cartridge

A sealing method for an ink container having a front side, a rear side, a bottom side, an upper side and two lateral sides, and having an ink supply port for supplying ink to a recording head portion and an air vent for fluid communication between an inside of the ink container and ambience. A seal member is mounted on a first one of the sides and on a second one of the sides continuous with the first side, the seal member having a width larger than a width of the first and second sides. A portion of the seal member is inwardly folded beyond the width of the first side. A portion of the seal member is outwardly folded beyond the width of the second side. The inwardly folded portion of the seal member is heat-sealed to a side of a packaging bladder for accommodating the ink container.

Sealing method for ink cartridge

An ink jet head includes a plurality of liquid flow paths for ejecting the ink; and a plurality of heat generating resistors for the respective liquid flow paths, the heat generating resistor being independently drivable; wherein adjacent ones of the heat generating resistors are spaced by not more than 8 microns.

Element substrate having connecting wiring between heat generating resistor elements and ink jet recording apparatus

An ink jet recording device includes a recording head having a discharge portion which has a discharge port array of discharge ports for discharging ink to a recording medium, a wiping member engageable with the discharge portion to wipe the discharge portion, and a cleaning member engageable with the wiping member to clean the wiping member, wherein a range of the discharge port array is smaller than a width of the wiping member, and the wiping member is equal to or smaller than a width of the cleaning member.

Ink jet recording apparatus

An ink cartridge for ink jet use is provided with an aperture for filling in the cartridge with ink. The circumference of the aperture and a part of a plug pressed in the aperture are fused and welded to be formed integrally to airtightly close the aperture, and obtain an integrated structure without any interface. Hence, it is made possible to reliably prevent ink from leaking therefrom, even if some scratches and cracks are present on both of them. This contributes to eliminating inspection steps to find ink leakage in the course of manufacture, and also, contributes to improving the yield of production. As a result, a significant reduction of costs is possible, while enhancing the reliability of the ink cartridge.

Ink cartridge and a method for sealing an aperture provided for such cartridge

The present invention provides a liquid discharging head comprising a substrate having a plurality of heat generating elements for generating a bubble in liquid and a grooved member having a plurality of grooves constituting a plurality of liquid passages and wherein the liquid passages for respective heat generating elements are formed by joining the grooved member to the substrate and further wherein the grooved member has an opening portion into which the substrate is inserted and the opening portion has the plurality of grooves which constitute the liquid passages for the respective heat generating elements when the substrate is inserted into the opening portion.

Liquid discharging head, method for manufacturing such liquid discharging head, head cartridge and liquid discharging apparatus

A method for manufacturing liquid discharge heads is provided with discharge ports for discharging liquid, liquid flow paths communicated with the discharge ports for supplying liquid to the discharge ports, a substrate having heat generating members for creating bubbles in liquid, and movable members facing the heat generating members, each being arranged in each liquid flow path, having the free end on the discharge port side with a specific gap with the heat generating member. This method comprises the steps of forming the boundary layer used for providing a gap between the movable member and the substrate above the heat generating member on the substrate, of laminating the movable member on the boundary layer so as to position the free end above the heat generating member, at the same time fixing the movable member on the substrate, and of forming the gap between the movable member and the heat generating member by use of the boundary layer. With the structure thus arranged, there is no need for the step to position the movable member with the substrate, and also, the movable portion of the movable member is separated from the substrate after the movable member is formed on the substrate and incorporated in the liquid discharge head so as to implement arranging the interior of each liquid flow path finer and more precisely.

Method of manufacturing a liquid discharge head

An ink jet recording head comprises a grooved ceiling plate provided with a plurality of discharge openings for discharging ink, and a plurality of ink flow path grooves to form ink flow paths conductively connected with the discharge openings, a plurality of elemental substrates provided with a plurality of electrothermal transducing devices to generate thermal energy used for discharging ink, and a metallic pressure member for pressing the plurality of elemental substrates to be in contact with the grooved ceiling plate. The grooved ceiling plate and the elemental substrates are coupled to enable the ink flow path grooves and the electrothermal transducing devices to correspond to each other for the formation of ink flow paths. Here, the pressure member presses the reverse side of the surface of the elemental substrates having the electrothermal transducing devices provided therefor in order to couple the elemental substrates with the grooved ceiling plate. With the structure thus arranged, heat generated by the elemental substrates is efficiently transferred to the pressure member for radiation even for an ink jet recording head having no base plate or having a smaller base plate than the conventional one, while coupling the substrates and ceiling plate closely and reliably for the attainment of high quality recording.

Ink jet recording head, an ink jet cartridge, and an ink jet recording apparatus

Growing community of inventors

Kawasaki, Japan

Kazuaki Masuda