Patents by Inventor Takayuki Iwasaki
Takayuki Iwasaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7401478Abstract: The manufacturing method comprises: a softening step of softening a straight glass tube in a heating furnace; a moving and placing step of moving the softened glass tube so that the glass tube is placed on the top of the mandrel; and a winding step of winding the glass tube placed on the top of the mandrel around the periphery of the mandrel. The mandrel is disposed beneath the glass tube starting to get soft, and the glass tube being soft is perpendicularly lowered in order to be placed on the top of the mandrel. In the winding step, the winding speed Vr at which the glass tube is wound around the mandrel is higher than the moving speed Vs at which chuck units holding the ends of the glass tube move toward the mandrel.Type: GrantFiled: March 31, 2004Date of Patent: July 22, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tatsuhiro Yabuki, Noriyuki Uchida, Takayuki Iwasaki, Shiro Iida
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Patent number: 7387230Abstract: In order to provide a brazing sheet having excellent workability, a powder of a brazing filler metal composition is obtained from a single type of powder or by mixing two or more powders to form the brazing filler metal composition. By powder roll compaction of the powder, the powder is formed into a sheet shape.Type: GrantFiled: December 26, 2003Date of Patent: June 17, 2008Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.Inventors: Chitoshi Mochizuki, Takayuki Iwasaki, Hiroki Yoshizawa
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Patent number: 7289553Abstract: A communication system is provided including a transceiver and an application controller to transmit and receive signals through the transceiver. An isolator which insulates and separates the transceiver and application controller includes primary and secondary side circuits insulated from each other on a substrate and a capacitive insulating means to transfer signals between the primary and second sides while insulating and separating the primary side circuit from the secondary side circuit.Type: GrantFiled: March 4, 2003Date of Patent: October 30, 2007Assignee: Hitachi, Ltd.Inventors: Seigoh Yukutake, Yasuyuki Kojima, Minehiro Nemoto, Masatsugu Amishiro, Takayuki Iwasaki, Shinichiro Mitani, Katsuhiro Furukawa, Chiyoshi Kamada, Atsuo Watanabe, Takayuki Oouchi, Nobuyasu Kanekawa
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Publication number: 20070184243Abstract: A cover tape comprising at least a substrate layer and a heat sealing layer, wherein (1) an antistatic layer containing an antistatic agent and an anticorrosive agent, is formed on the heat sealing layer, or (2) the heat sealing layer side has an average surface roughness (Ra) of from 0.3 to 1.0 ?m, and has an antistatic agent applied thereon to form an antistatic layer.Type: ApplicationFiled: April 25, 2005Publication date: August 9, 2007Applicant: Denki Kagaku Kogyo Kabushiki KaishaInventors: Takeshi Ono, Masanori Higano, Masanori Ishii, Takayuki Iwasaki
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Publication number: 20070153886Abstract: A communication system is provided including a transceiver and an application controller to transmit and receive signals through the transceiver. An isolator which insulates and separates the transceiver and application controller includes primary and secondary side circuits insulated from each other on a substrate and a capacitive insulating means to transfer signals between the primary and second sides while insulating and separating the primary side circuit from the secondary side circuit.Type: ApplicationFiled: March 7, 2007Publication date: July 5, 2007Inventors: Seigoh Yukutake, Yasuyuki Kojima, Minehiro Nemoto, Masatsugu Amishiro, Takayuki Iwasaki, Shinichiro Mitani, Katsuhiro Furukawa, Chiyoshi Kamada, Atsuo Watanabe, Takayuki Oouchi, Nobuyasu Kanekawa
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Publication number: 20070045727Abstract: A technology capable of realizing a MOSFET with low ON-resistance and low feedback capacitance, in which the punch through of a channel layer can be prevented even when the shallow junction of the channel layer is formed in a planar type MOSFET is provided. A P type polysilicon is used for a gate electrode in a planar type MOSFET, in particular, in an N channel DMOSFET.Type: ApplicationFiled: August 24, 2006Publication date: March 1, 2007Inventors: Masaki Shiraishi, Takayuki Iwasaki, Nobuyoshi Matsuura, Yoshito Nakazawa, Tsuyoshi Kachi
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Patent number: 7134307Abstract: A plate rolling mill includes a pair of work rolls that hold and press down a plate material therebetween, a plurality of backup rolls that prevent the work rolls from being deformed, and intermediate rolls each of which is disposed between the work roll and the backup roll so as to be shiftable. Each of the intermediate rolls has a contact roll portion that contacts with the backup roll, and an extension barrel portion that is connected to an end of the contact roll portion and does not contact the backup roll at any shifted position. The contact roll is formed to have a convex shape such that a convex center of the contact roll is positioned at a side of the extension barrel portion.Type: GrantFiled: July 8, 2004Date of Patent: November 14, 2006Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.Inventors: Hisashi Honjo, Takayuki Iwasaki
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Patent number: 7109577Abstract: A power MOS-FET is used as a high side switch transistor for a non-insulated DC/DC converter. An electrode section that serves as a source terminal of the power MOS-FET is connected to one outer lead and two outer leads via bonding wires respectively. The outer lead is an external terminal connected to a path for driving the gate. Each of the outer leads is an external terminal connected to a main current path. Owing to the connection of the main current path and the gate driving path in discrete form, the influence of parasitic inductance can be reduced and voltage conversion efficiency can be improved.Type: GrantFiled: May 3, 2004Date of Patent: September 19, 2006Assignee: Renesas Technology Corp.Inventors: Masaki Shiraishi, Takayuki Iwasaki, Nobuyoshi Matsuura, Tomoaki Uno
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Patent number: 7093473Abstract: An apparatus for manufacturing a band plate has a rolling mill that includes a pair of upper and lower work rolls that roll a slab material having edge drop portions at both ends thereof, and a pair of backup rolls that contact non-rolling side surfaces of the pair of upper and lower work rolls, respectively to prevent the work rolls from being deformed. The work roll includes a reverse taper portion where a roll diameter gradually increases towards a barrel end portion thereof corresponding to the edge drop portion. The upper and lower work rolls are configured to be shiftable individually in the axial direction thereof. The backup roll includes an escape portion whose diameter gradually decreases towards an axial end thereof so as not to contact the reverse taper portion of the work roll, within a shifting range of the work roll.Type: GrantFiled: July 8, 2004Date of Patent: August 22, 2006Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.Inventors: Hisashi Honjo, Takayuki Iwasaki
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Patent number: 7089525Abstract: The number of design processes for fabricating semiconductor devices can be reduced by parallel connection of a plurality of unit bipolar transistors Qu that are completely electrically isolated from each other in a semiconductor layer of an SOI substrate 1 to form a bipolar transistor having a large current capacity.Type: GrantFiled: October 21, 2003Date of Patent: August 8, 2006Assignees: Hitachi, Ltd., Hitachi ULSI Systems Co., Ltd.Inventors: Yoichi Tamaki, Takayuki Iwasaki, Kousuke Tsuji, Chiyoshi Kamada
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Publication number: 20060163322Abstract: In order to provide a brazing sheet having excellent workability, a powder of a brazing filler metal composition is obtained from a single type of powder or by mixing two or more powders to form the brazing filler metal composition. By powder roll compaction of the powder, the powder is formed into a sheet shape.Type: ApplicationFiled: December 26, 2003Publication date: July 27, 2006Inventors: Chitoshi Mochizuki, Takayuki Iwasaki
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Patent number: 7019362Abstract: The gate resistance of a power MOSFET in a semiconductor chip is reduced and the reliability and yield of the gate of the power MOSFET are improved The semiconductor chip includes two or more control electrode pads functioning as control electrodes for a power semiconductor device formed within a semiconductor chip. The two or more control electrode pads are distributed within the periphery of the gate area of the power semiconductor device such that the gate resistance of the power semiconductor device can be reduced. The two or more control electrode pads are connected via bumps or a conductive bonding material to an electrode layer of a multilayer circuit board disposed outside the semiconductor chip.Type: GrantFiled: February 20, 2004Date of Patent: March 28, 2006Assignee: Renesas Technology, Corp.Inventors: Kozo Sakamoto, Takayuki Iwasaki, Masaki Shiraishi
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Patent number: 7005834Abstract: In a power supply of a synchronous rectification type, the self-turn on phenomenon of MOSFET is suppressed without increase of the drive loss to thereby improve the power efficiency. In a synchronous rectifier circuit, a threshold value of a commutation MOSFET is made higher than that of a rectification MOSFET and particularly a threshold value of a commutation MOSFET 3 is made 0.5V or more higher than that of a rectification MOSFET 2. The threshold value of the rectification MOSFET 2 is lower than 1.5V and the threshold of the commutation MOSFET 3 is higher than 2.0V.Type: GrantFiled: July 2, 2004Date of Patent: February 28, 2006Assignee: Renesas Technology Corp.Inventors: Takayuki Iwasaki, Kozo Sakamoto, Masaki Shiraishi, Nobuyoshi Matsuura, Tomoaki Uno
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Publication number: 20060006432Abstract: A semiconductor device in which the self-turn-on phenomenon is prevented that can significantly improve power conversion efficiency. The semiconductor device is a system-in-package for power supply applications in which a high-side switch, a low-side switch, and two drivers are included in a single package. The device includes an auxiliary switch disposed between the gate and source of said low-side switch, and a low-side MOSFET 3 for the low-side switch and an auxiliary MOSFET 4 for the auxiliary switch are disposed on the same chip. In this way, the self-turn-on phenomenon can be prevented, allowing the mounting of a low-side MOSFET 3 with a low threshold voltage and thereby significantly improving power conversion efficiency. The gate of the auxiliary MOSFET 4 is driven by the driver for the high-side MOSFET 2, thereby eliminating the need for a new drive circuit and realizing the same pin configuration as existing products, which facilitates easy replacement.Type: ApplicationFiled: July 7, 2005Publication date: January 12, 2006Inventors: Masaki Shiraishi, Takayuki Iwasaki, Nobuyoshi Matsuura
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Patent number: 6886583Abstract: A canister vent valve mounting structure for a canister vent valve is configured to prevent center deviation when the canister vent valve is connected to the canister and enables the canister to be shared by different vehicle models. The canister vent valve includes a connecting pipe part that fits into an insertion hole formed in the canister. Several mating projections are arranged in the circumferential direction of the connecting pipe part such that they are formed on the outside circumference of the connecting pipe part near the tip thereof. Several notches into which mating projections can be inserted are formed in the inside circumferential surface of the insertion hole. The canister vent valve mounting structure between the canister and the canister vent valve is configured and arranged to retain the canister vent valve in at least two different orientations relative to the canister.Type: GrantFiled: February 14, 2003Date of Patent: May 3, 2005Assignee: Nissan Motor Co., Ltd.Inventors: Hideyuki Matsushima, Takayuki Iwasaki
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Publication number: 20050044916Abstract: An apparatus for manufacturing a band plate has a rolling mill that includes a pair of upper and lower work rolls that roll a slab material having edge drop portions at both ends thereof, and a pair of backup rolls that contact non-rolling side surfaces of the pair of upper and lower work rolls, respectively to prevent the work rolls from being deformed. The work roll includes a reverse taper portion where a roll diameter gradually increases towards a barrel end portion thereof corresponding to the edge drop portion. The upper and lower work rolls are configured to be shiftable individually in the axial direction thereof. The backup roll includes an escape portion whose diameter gradually decreases towards an axial end thereof so as not to contact the reverse taper portion of the work roll, within a shifting range of the work roll.Type: ApplicationFiled: July 8, 2004Publication date: March 3, 2005Applicant: Ishikawajima-Harima Heavy Industries Co., Ltd.Inventors: Hisashi Honjo, Takayuki Iwasaki
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Publication number: 20050028575Abstract: A plate rolling mill includes a pair of work rolls that hold and press down a plate material therebetween, a plurality of backup rolls that prevent the work rolls from being deformed, and intermediate rolls each of which is disposed between the work roll and the backup roll so as to be shiftable. Each of the intermediate rolls has a contact roll portion that contacts with the backup roll, and an extension barrel portion that is connected to an end of the contact roll portion and does not contact the backup roll at any shifted position. The contact roll is formed to have a convex shape such that a convex center of the contact roll is positioned at a side of the extension barrel portion.Type: ApplicationFiled: July 8, 2004Publication date: February 10, 2005Applicant: Ishikawajima-Harima Heavy Industries Co., Ltd.Inventors: Hisashi Honjo, Takayuki Iwasaki
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Publication number: 20050007078Abstract: In a power supply of a synchronous rectification type, the self-turn on phenomenon of MOSFET is suppressed without increase of the drive loss to thereby improve the power efficiency. In a synchronous rectifier circuit, a threshold value of a commutation MOSFET is made higher than that of a rectification MOSFET and particularly a threshold value of a commutation MOSFET 3 is made 0.5V or more higher than that of a rectification MOSFET 2. The threshold value of the rectification MOSFET 2 is lower than 1.5V and the threshold of the commutation MOSFET 3 is higher than 2.0V.Type: ApplicationFiled: July 2, 2004Publication date: January 13, 2005Inventors: Takayuki Iwasaki, Kozo Sakamoto, Masaki Shiraishi, Nobuyoshi Matsuura, Tomoaki Uno
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Publication number: 20050006649Abstract: A static induction transistor includes a semiconductor substrate with an energy band gap greater than that of silicon, and the semiconductor substrate has a first gate region to which a gate electrode is connected; and a second gate region positioned within a first semiconductor region which becomes a drain region, and the first gate region is in contact with a second semiconductor region which becomes a source region. According to this construction, the OFF characteristics of the static induction transistor are improved.Type: ApplicationFiled: April 15, 2004Publication date: January 13, 2005Inventors: Takayuki Iwasaki, Tsutomu Yatsuo, Hidekatsu Onose, Toshiyuki Oono
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Publication number: 20040231365Abstract: The manufacturing method comprises: a softening step of softening a straight glass tube in a heating furnace; a moving and placing step of moving the softened glass tube so that the glass tube is placed on the top of the mandrel; and a winding step of winding the glass tube placed on the top of the mandrel around the periphery of the mandrel. The mandrel is disposed beneath the glass tube starting to get soft, and the glass tube being soft is perpendicularly lowered in order to be placed on the top of the mandrel. In the winding step, the winding speed Vr at which the glass tube is wound around the mandrel is higher than the moving speed Vs at which chuck units holding the ends of the glass tube move toward the mandrel.Type: ApplicationFiled: March 31, 2004Publication date: November 25, 2004Inventors: Tatsuhiro Yabuki, Noriyuki Uchida, Takayuki Iwasaki, Shiro Iida