Patents by Inventor Takumi Nasu
Takumi Nasu 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).
-
Publication number: 20220268267Abstract: Multiple diaphragm pumps are known in the art that are operated by compressed air and in which the valves are controlled by a slide element. The slide element is magnetically actuated without mechanical engagement involved in the actuation. This has the consequence that only a small amount of force can be applied which may not be sufficient due to static friction of the valve seal. The invention presents a hybrid solution which facilitates a mechanical actuation of a valve piston provided for valve control as well as a magnetic overcoming of a dead center that may be reached by the valve piston and the diaphragm piston that actuates the diaphragms of the multiple diaphragm pump.Type: ApplicationFiled: February 12, 2022Publication date: August 25, 2022Inventors: Takumi Nasu, Alexander Ries, Andrej Getze
-
Patent number: 9406404Abstract: A memory array having a main memory array and a redundant memory array. The redundant memory array includes redundant memory arranged in replacement units to which memory of the main memory are mapped. Each replacement unit includes columns of redundant memory arranged in input-output (IO) groups and further includes columns of redundant memory from a plurality of IO groups. The IO groups have columns of memory associated with a plurality of different IOs and the plurality of IO groups of the replacement unit adjacent one another.Type: GrantFiled: August 22, 2007Date of Patent: August 2, 2016Assignee: Micron Technology, Inc.Inventors: Takuya Nakanishi, Takumi Nasu, Tim Cowles
-
Patent number: 8743650Abstract: Systems, memory arrays and methods (e.g., methods of block repair) are provided. One such system includes a memory array including a memory bank including a plurality of sections, wherein each of the plurality of sections includes at least one redundant row. Further embodiments provide for mapping non-redundant rows associated with a section associated with a block failure to distributed redundant rows.Type: GrantFiled: November 29, 2011Date of Patent: June 3, 2014Assignee: Micron Technology, Inc.Inventors: Takumi Nasu, Takuya Nakanishi
-
Patent number: 8223583Abstract: Embodiments are provided that include a row decoder, including a row activation path, having a row address converter with an output coupled to an input of a section replacement detector. Further embodiments provide a method including mapping an external row address to an internal row address, wherein the internal row address comprises a section address, determining whether a section corresponding to the section address includes an error, and if the section includes an error, converting the internal row address to a redundant row address, wherein mapping the external row address to the internal row address is initiated prior to determining whether the section replacement should be performed. Further embodiments include a method for receiving a row address for a row in a memory section including a non-2^n number of normal rows and mapping the row address to a redundant row address by subtracting a value from the row address.Type: GrantFiled: March 25, 2011Date of Patent: July 17, 2012Assignee: Micron Technology, Inc.Inventors: Takuya Nakanishi, Takumi Nasu, Yoshinori Fujiwara
-
Publication number: 20120069691Abstract: Systems, memory arrays and methods (e.g., methods of block repair) are provided. One such system includes a memory array including a memory bank including a plurality of sections, wherein each of the plurality of sections includes at least one redundant row. Further embodiments provide for mapping non-redundant rows associated with a section associated with a block failure to distributed redundant rows.Type: ApplicationFiled: November 29, 2011Publication date: March 22, 2012Applicant: Micron Technology, Inc.Inventors: Takumi Nasu, Takuya Nakanishi
-
Patent number: 8068380Abstract: Systems, memory arrays and methods (e.g., methods of block repair) are provided. One such system includes a memory array including a memory bank including a plurality of sections, wherein each of the plurality of sections includes at least one redundant row. Further embodiments provide for mapping non-redundant rows associated with a section associated with a block failure to distributed redundant rows.Type: GrantFiled: May 15, 2008Date of Patent: November 29, 2011Assignee: Micron Technology, Inc.Inventors: Takumi Nasu, Takuya Nakanishi
-
Publication number: 20110170365Abstract: Embodiments are provided that include a row decoder, including a row activation path, having a row address converter with an output coupled to an input of a section replacement detector. Further embodiments provide a method including mapping an external row address to an internal row address, wherein the internal row address comprises a section address, determining whether a section corresponding to the section address includes an error, and if the section includes an error, converting the internal row address to a redundant row address, wherein mapping the external row address to the internal row address is initiated prior to determining whether the section replacement should be performed. Further embodiments include a method for receiving a row address for a row in a memory section including a non-2?n number of normal rows and mapping the row address to a redundant row address by subtracting a value from the row address.Type: ApplicationFiled: March 25, 2011Publication date: July 14, 2011Applicant: Micron Technology, Inc.Inventors: Takuya Nakanishi, Takumi Nasu, Yoshinori Fujiwara
-
Patent number: 7933162Abstract: Embodiments are provided that include a row decoder, including a row activation path, having a row address converter with an output coupled to an input of a section replacement detector. Further embodiments provide a method including mapping an external row address to an internal row address, wherein the internal row address comprises a section address, determining whether a section corresponding to the section address includes an error, and if the section includes an error, converting the internal row address to a redundant row address, wherein mapping the external row address to the internal row address is initiated prior to determining whether the section replacement should be performed. Further embodiments include a method for receiving a row address for a row in a memory section including a non-2^n number of normal rows and mapping the row address to a redundant row address by substracting a value from the row address.Type: GrantFiled: May 22, 2008Date of Patent: April 26, 2011Assignee: Micron Technology, Inc.Inventors: Takuya Nakanishi, Takumi Nasu, Yoshinori Fujiwara
-
Publication number: 20090290440Abstract: Embodiments are provided that include a row decoder, including a row activation path, having a row address converter with an output coupled to an input of a section replacement detector. Further embodiments provide a method including mapping an external row address to an internal row address, wherein the internal row address comprises a section address, determining whether a section corresponding to the section address includes an error, and if the section includes an error, converting the internal row address to a redundant row address, wherein mapping the external row address to the internal row address is initiated prior to determining whether the section replacement should be performed.Type: ApplicationFiled: May 22, 2008Publication date: November 26, 2009Applicant: MICRON TECHNOLOGY, INC.Inventors: Takuya Nakanishi, Takumi Nasu
-
Publication number: 20090285043Abstract: Systems, memory arrays and methods (e.g., methods of block repair) are provided. One such system includes a memory array including a memory bank including a plurality of sections, wherein each of the plurality of sections includes at least one redundant row. Further embodiments provide for mapping non-redundant rows associated with a section associated with a block failure to distributed redundant rows.Type: ApplicationFiled: May 15, 2008Publication date: November 19, 2009Applicant: MICRON TECHNOLOGY, INC.Inventors: Takumi Nasu, Takuya Nakanishi
-
Patent number: 7515501Abstract: A memory architecture for an array of memory cells having a plurality of sections of memory and a plurality of regions disposed between the plurality of sections of memory. Each section of memory having a plurality of memory cells arranged in rows and columns of memory and a plurality of sense amplifiers located in each of the plurality of regions. The sense amplifiers coupled to a respective column of memory. A plurality of column select lines are located in each of the plurality of regions with each column select line coupled to a group of column select switches associated with a section of memory to activate the respective column select switches.Type: GrantFiled: May 24, 2007Date of Patent: April 7, 2009Assignee: Micron Technology, Inc.Inventors: Shinji Bessho, Takumi Nasu, Takuya Nakanishi, Koichiro Ito
-
Publication number: 20090055621Abstract: A memory array having a main memory array and a redundant memory array. The redundant memory array includes redundant memory arranged in replacement units to which memory of the main memory are mapped. Each replacement unit includes columns of redundant memory arranged in input-output (IO) groups and further includes columns of redundant memory from a plurality of IO groups. The IO groups have columns of memory associated with a plurality of different IOs and the plurality of IO groups of the replacement unit adjacent one another.Type: ApplicationFiled: August 22, 2007Publication date: February 26, 2009Applicant: Micron Technology, Inc.Inventors: Takuya Nakanishi, Takumi Nasu, Tim Cowles
-
Publication number: 20080291766Abstract: A memory architecture for an array of memory cells having a plurality of sections of memory and a plurality of regions disposed between the plurality of sections of memory. Each section of memory having a plurality of memory cells arranged in rows and columns of memory and a plurality of sense amplifiers located in each of the plurality of regions. The sense amplifiers coupled to a respective column of memory. A plurality of column select lines are located in each of the plurality of regions with each column select line coupled to a group of column select switches associated with a section of memory to activate the respective column select switches.Type: ApplicationFiled: May 24, 2007Publication date: November 27, 2008Applicant: MICRON TECHNOLOGY, INC.Inventors: Shinji Bessho, Takumi Nasu, Takuya Nakanishi, Koichiro Ito
-
Patent number: 6373745Abstract: The objective of this invention is to reduce the layout area while guaranteeing data retention stability in a static type semiconductor memory cell. This SRAM cell is constituted with two MOS transistors 10 and 12 and one inverter circuit 14. The source terminal of PMOS transistor 10 is connected to bit line (BL), the drain terminal is connected to data storage node (Na), and the gate terminal is connected to word line (WL). The source tenninal of NMOS transistor 12 is connected to a supply voltage terminal that provides low-level reference potential VSS (for example, zero volts), the drain terminal is connected to data storage node (Na), and the gate terminal is connected to the output terminal o inverter circuit 14. The input terminal of inverter circuit 14 is connected to data storage node (Na).Type: GrantFiled: March 21, 2001Date of Patent: April 16, 2002Assignee: Texas Instruments IncorporatedInventors: Yoritaka Saito, Hiroshi Ikeda, Takumi Nasu, Kohsuke Ikeda, Yoshinobu Matsumoto, Satoshi Nakayama, Yasuhito Ichimura
-
Publication number: 20010033511Abstract: The objective of this invention is to reduce the layout area while guaranteeing data retention stability in a static type semiconductor memory cell. This SRAM cell is constituted with two MOS transistors 10 and 12 and one inverter circuit 14. The source terminal of PMOS transistor 10 is connected to bit line (BL), the drain terminal is connected to data storage node (Na), and the gate terminal is connected to word line (WL). The source terminal of NMOS transistor 12 is connected to a supply voltage terminal that provides low-level reference potential VSS (for example, zero volts), the drain terminal is connected to data storage node (Na), and the gate terminal is connected to the output terminal o inverter circuit 14. The input terminal of inverter circuit 14 is connected to data storage node (Na).Type: ApplicationFiled: March 21, 2001Publication date: October 25, 2001Inventors: Yoritaka Saito, Hiroshi Ikeda, Takumi Nasu, Kohsuke Ikeda, Yoshinobu Matsumoto, Satoshi Nakayama, Yasuhito Ichimura
-
Patent number: 6249472Abstract: The objective of the invention is to provide a type of semiconductor memory device whose antifuse can be formed without any additional film manufacturing process. A first electrode is formed by a first polysilicon film 37 formed on semiconductor substrate 30 and a second polysilicon film 39 deposited on the surface of the first polysilicon film. The first electrode, a dielectric film formed on the surface of the first electrode, and a second electrode form capacitor 11 in the memory cell. An antifuse 12 with the same configuration as capacitor 11 is formed in the semiconductor memory device. Because there is no need to use an additional film, the manufacturing cost is low, and antifuse 12 can be easily arranged. It is also possible to form antifuse 13 by forming instead of depositing the second polysilicon film 39 on the surface of the first polysilicon film 39.Type: GrantFiled: December 18, 1998Date of Patent: June 19, 2001Assignee: Texas Instruments IncorporatedInventors: Yoshimitsu Tamura, Takumi Nasu, Hideyuki Fukuhara, Shigeki Numaga
-
Patent number: 6178136Abstract: A dynamic random access memory (DRAM) includes a Y-select circuit (218) that connects a pair of bit lines (204a and 204b) to a pair of sense nodes (210a and 210b). The Y-select circuit (218) provides a first impedance in a read operation, and a second impedance that is lower than the first impedance, in a write operation. Changes in Y-select circuit (218) impedance are achieved by driving transistors (N210a and N210b) within the Y-select circuit (218) with a first voltage during a read operation, and a second voltage during a write operation.Type: GrantFiled: September 23, 1999Date of Patent: January 23, 2001Assignee: Texas Instruments IncorporatedInventors: Heng-Chih Lin, Takumi Nasu, David B. Scott
-
Patent number: 6038191Abstract: A circuit for reducing the stand-by current of semiconductor device is disclosed in a number of embodiments. In a first embodiment, a first conductive line (302), such as a bit line or common capacitor plate in a DRAM, is charged to a first potential in a stand-by state. A second conductive line (304), such as a word line in a DRAM, is driven to the first potential in the stand-by state in the event a short circuit condition exists between the first conductive line (302) and the second conductive line (304). In a second embodiment, a second conductive line (404) in a semiconductor device is 34w isolated from other circuits in the semiconductor device in a stand-by mode. This allows the second conductive line (404) to rise to a short circuit potential in the event a short circuit condition exists between the second conductive line (404) and a short circuit potential.Type: GrantFiled: July 2, 1998Date of Patent: March 14, 2000Assignee: Texas Instruments IncorporatedInventors: Hideyuki Fukuhara, Hiroya Nakamura, Takumi Nasu
-
Patent number: 5875194Abstract: Objective: To make it possible to easily increase the integration level and increase the memory capacity of a semiconductor memory device by using a single redundant decoder to completely repair defects at one or two neighboring addresses. Structure: The redundant circuit of the present invention comprises the following: an address code conversion circuit (2) which converts address signals, inputted in binary code, into gray code; a decoder (3) which outputs a coincidence signal after determining whether the addresses set in advance coincide or do not coincide with the gray code outputted from the aforementioned address code conversion circuit; a first driver (DR2) which drives a first redundant line which is connected to a redundant memory cell designed to supplement memory cells in which defects have occurred; and a second driver (DR1) which drives a second redundant line.Type: GrantFiled: May 28, 1993Date of Patent: February 23, 1999Assignee: Texas Instruments IncorporatedInventor: Takumi Nasu
-
Patent number: 5689465Abstract: To provide a semiconductor memory device characterized by the fact that it can prevent errors in the redundant memory address coincidence signal generating circuit caused by the intrinsic resistance of the fuse in the fuse decoder, and it has a redundant mechanism for generating the high-speed address coincidence signal.It has multiple logic gate means and fuses programmable by the gate output. The output signal of each fuse is wired to generate address coincidence signal.Type: GrantFiled: August 26, 1996Date of Patent: November 18, 1997Assignee: Texas Instruments IncorporatedInventors: Shunichi Sukegawa, Takumi Nasu, Hidetoshi Iwai