Patents Assigned to Fujitsu
  • Solder bump forming method, electronic component mounting method, and electronic component mounting structure
    Patent number: 6461953
    Abstract: A solder bump forming method includes the steps of packing solder (5) into a plurality of recesses (11) provided to the surface layer (12) of a substrate (1); and melting/hardening the solder to form solder bumps (5A) within the recesses (11). The solder bump forming method further includes, prior to the step of packing solder (5) into the plurality of recesses (11), a step of adhering or arranging a film (4) over the surface layer (12), and a step of producing in the film (4) a plurality of window portions (40) communicating with the plurality of recesses. The film (4) is composed of a material principal component of which is different from the material of the substrate (1).
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: October 8, 2002
    Assignee: Fujitsu Limited
    Inventors: Seiki Sakuyama, Hiroki Uchida
  • Modular lightpipe system
    Patent number: 6463204
    Abstract: A lightpipe system for transferring light from light sources on a printed circuit board (PCB), such as light-emitting diodes (LEDs), to a display includes modular lightpipes coupled together. Each modular lightpipe couples to an adjacent modular lightpipe to form an integrated lightpipe system. All or selected numbers of the lightpipes may include detachable tabs, proturbances, pegs, or other structures to ensure proper alignment of the lightpipe system and attachment of the lightpipe system to the PCB.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: October 8, 2002
    Assignee: Fujitsu Network Communications, Inc.
    Inventor: Babi P. Ati
  • Image data processing method and apparatus and storage medium
    Patent number: 6463183
    Abstract: An image data processing method is constructed to include a step of storing an image data which includes a first image data related to a first object and a second image data related to a background or a second object which is different from the first object, a step of storing distribution information which indicates a probability of each pixel data being included in the first image data, with respect to at least one portion of the first image data, and a step of adding the distribution information when extracting the first image data from the image data.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: October 8, 2002
    Assignee: Fujitsu Limited
    Inventor: Joe Mizuno
  • Variable sector size for a high density flash memory device
    Patent number: 6463516
    Abstract: A variable sector size for a flash memory device is disclosed. The total available memory of the flash memory device is divided into sub-units. Each sub-unit has a pre-decoder coupled with it to enable operations on the memory within that sub-unit. A sector size control register is coupled with pre-decoder enabling logic which is coupled with the pre-decoders. The sector size control register and pre-decoder enabling logic determines how many pre-decoders, and therefore how many sub-units, are activated at a given time for a given memory operation.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: October 8, 2002
    Assignees: Advanced Micro Devices, Inc., Fujitsu Limited
    Inventors: Nancy S. Leong, Johnny C. Chen, Tiao-Hua Kuo, Kazuhiro Kurihara
  • Semiconductor device as an object of thickness reduction
    Patent number: 6462415
    Abstract: There is provided a semiconductor device which comprises electrode pads formed on an insulating film on a semiconductor substrate, an insulating cover film formed on the insulating film to have openings that expose the electrode pads, and a masking tape having a base material layer and a resist layer coated on the base material layer, and for covering an upper surface of the cover film and inner surfaces of the openings in a situation that the resist layer is directed toward a semiconductor substrate side. Accordingly, it is possible to improve a throughput in a series of steps of grinding/polishing the semiconductor substrate and forming the bump electrodes which are required to thin the substrate of the semiconductor device.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: October 8, 2002
    Assignee: Fujitsu Limited
    Inventors: Masahiko Ishiguri, Eiji Watanabe, Yutaka Makino, Koichi Murata
  • Servo controller and servo control method
    Patent number: 6462686
    Abstract: A servo controller for correcting a read position of a head when reading data recorded on a recording medium. In accordance with the amplitude ratio of data signals read from each segment of a servo section defined on a recording medium, the servo controller generates an AGC signal corresponding to the next segment before reading the next segment. The data signal read from a phase detection segment of the servo section is amplified to an amplitude greater than the predetermined determination range. The amplified data signal is converted to a two-value digital signal in accordance with the determination range. The phase used during servo control is calculated in accordance with the digital signal.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: October 8, 2002
    Assignee: Fujitsu Limited
    Inventors: Shigetaka Asano, Yoshitaka Nakata
  • Trimming circuit of semiconductor apparatus
    Patent number: 6462609
    Abstract: A relatively compact trimming circuit for hypothetically breaking a fuse includes a resistance bypass circuit connected to a node between a resistor and a fuse. The bypass circuit selectively performs ordinary breakage and hypothetical breakage of the fuse in accordance with a control signal and a data signal. An output changeover circuit connected to the node generates a first output signal in accordance with a state of the fuse during the ordinary breakage. The output changeover circuit generates a second output signal in accordance with the data signal during the hypothetical breakage.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: October 8, 2002
    Assignee: Fujitsu Limited
    Inventors: Yasuhiro Hashimoto, Katsuya Shimizu
  • Stepper motor controlling apparatus
    Patent number: 6462502
    Abstract: A stepper motor controlling apparatus having a storing unit storing driving data for generating a stepper motor driving phase signal in each of plural controlling circuits, which share the driving data in the storing unit, thereby decreasing the total amount of the driving data. It is therefore possible to minimize the required capacity of the storing unit required for the driving data.
    Type: Grant
    Filed: October 7, 1999
    Date of Patent: October 8, 2002
    Assignee: Fujitsu Limited
    Inventors: Takashi Inui, Yoshinori Wada
  • Semiconductor device and method of producing the same
    Patent number: 6462395
    Abstract: In a semiconductor device having a multilayer interconnection structure, the contact resistance of a conductive plug that connects a wiring layer and an adjacent upper wiring layer is minimized by providing an enlarged portion at the lower end of the conductive plug.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: October 8, 2002
    Assignees: Fujitsu Limited, Kabushiki Kaisha Toshiba
    Inventors: Masatoshi Fukuda, Toshiya Suzuki, Tomio Katata, Naofumi Nakamura
  • Reflection type liquid crystal display device and manufacturing method thereof
    Publication number: 20020140886
    Abstract: The present invention is a method of manufacturing a liquid crystal display device, wherein light having an exposure energy is irradiated on the surface of a photo-sensitive resin layer having a predetermined film thickness, and a distribution of thermal deformation characteristics in the thickness direction (or the plane direction) of the photo-sensitive resin layer is formed, then heat treatment is performed to form random undulation (micro-grooves or micro-wrinkles) on the surface of the photo-sensitive resin layer.
    Type: Application
    Filed: January 18, 2002
    Publication date: October 3, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Norio Sugiura, Katsufumi Ohmuro, Yoshio Koike, Kunihiro Tashiro, Takeshi Gotoh, Tetsuya Hamada, Keiji Hayashi, Toshihiro Suzuki, Tetsuya Kobayashi, Kimiaki Nakamura, Mari Sugawara
  • High frequency semiconductor device
    Publication number: 20020139993
    Abstract: In a high frequency semiconductor device, a shield plate which is connected to the ground potential is provided above an MMIC structure including line conductors, with an insulating interlayer provided therebetween. By using the shield plate to shield the MMIC, interference caused by external electromagnetic waves or leakage of electromagnetic waves to the exterior can be reduced in a chip alone.
    Type: Application
    Filed: March 6, 2002
    Publication date: October 3, 2002
    Applicant: Fujitsu Quantum Devices Limited
    Inventors: Yoshio Aoki, Yutaka Mimino, Osamu Baba, Muneharu Gotoh
  • Semiconductor memory device and control method thereof
    Publication number: 20020141226
    Abstract: A semiconductor memory device, in which a cell plate potential does not fluctuate even when the device state is changed from a state without stored charge in all charge storage nodes of the cell capacitors at power-on to an access operation state, comprises NMOS transistors M1 to Mk for connecting a line VPR as a feeder for a reference voltage VPR from a reference voltage generation circuit with a line VCP as a feeder for a reference voltage VCP from the reference voltage generation circuit in each of cell blocks B1 to Bk. Gate terminals of the NMOS transistors M1 to Mk are connected to a common signal &phgr;CPR. The signal &phgr;CPR outputs a positive logical level at a predetermined time after power-on. By providing the NMOS transistors M1 to Mk for short-circuiting the line VPR with the line VCP in each of the cell blocks B1 to Bk, both lines are short-circuited in each of the cell blocks B1 to Bk.
    Type: Application
    Filed: October 23, 2001
    Publication date: October 3, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiharu Kato, Satoru Kawamoto
  • Semiconductor device having divided active regions with comb-teeth electrodes thereon
    Publication number: 20020140024
    Abstract: A high-frequency semiconductor device for power amplification has a comb-teeth electrode on each of active regions formed on the front surface of the semiconductor substrate. One aspect of the present invention, there is provided a monolithic microwave integrated circuit (MMIC) having a plurality of rectangular-shaped active regions arranged side by side on the front surface of the semiconductor substrate, each of the active regions having interdigited gate, drain and source electrodes thereon which are connected to the respective pads by multilayer interconnection technique. Additionally, the source potential is fed from the back surface of the substrate through a metal plugged via-hole.
    Type: Application
    Filed: March 14, 2002
    Publication date: October 3, 2002
    Applicant: FUJITSU QUANTUM DEVICES LIMITED
    Inventors: Yoshio Aoki, Yutaka Mimino, Osamu Baba, Muneharu Gotoh
  • Credit card management method, credit card management program, credit card management device
    Publication number: 20020143570
    Abstract: A credit card management device is provided with a first storing unit which stores transaction forms, a second storing unit which stores a credit limit corresponding to the transaction form, a unit which receives the credit card identification information and store identification information together with a credit amount, a unit which extracts the transaction form corresponding to the store identification information from the first storing unit, a unit which extracts credit card identification information and a credit limit corresponding to the transaction form from a second storing unit, and a unit which makes a determination as to whether or not the credit amount is within the credit limit, thus, in an attempt to use a credit card through the Internet or the like, it is possible to use a card through the network without qualms.
    Type: Application
    Filed: February 11, 2002
    Publication date: October 3, 2002
    Applicant: Fujitsu Limited
    Inventor: Yoshikazu Tobita
  • Liquid crystal display device and driving circuit thereof
    Publication number: 20020140664
    Abstract: A driving circuit of a liquid crystal display device having driver output lines connected to outputs of a data line driver, m pieces of block selection signal lines for sequentially selecting m pieces of blocks, data lines for supplying data to a display area, and a switch for sequentially connecting an ith driver output line to ith, i+2jth, . . . , and i+2j×(m−1)th data lines in response to signals on the m pieces of block selection signal lines when j is a positive integer smaller than m.
    Type: Application
    Filed: January 3, 2002
    Publication date: October 3, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Hiromi Enomoto, Hongyong Zhang, Tsutomu Kai, Masanori Nakamura, Susumu Okazaki
  • Processing method for copying between memory device data regions and memory system
    Publication number: 20020144070
    Abstract: A processing method for copying between storage device data regions and a memory system are provided to allow immediate access in a state of having completed copying in response to a copy instruction, even when actual data is being copied in a remote system, thus preventing a decrease in the performance of the access to the copy source during copying. Processes include copying data in a data region of a copy source to an intermediate media data region for each prescribed block unit in response to a copy instruction, as well as copying the data copied to the intermediate media data region to a copy destination data region. Processes also include interrupting copying and processing an access when there is an external access for a block of the copy source or the copy destination data region during the copy processing.
    Type: Application
    Filed: October 31, 2001
    Publication date: October 3, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Futoshi Watanabe, Yasuhiro Onda, Hidejiro Daikokuya, Mikio Ito
  • Operating information management apparatus and operating information management program storage medium
    Publication number: 20020143581
    Abstract: An operating information management apparatus includes a set master storage unit 142 storing an information set including article information and practice information, an information input unit 121 receiving an input of article information, a retrieval unit 122 retrieving an information set of the set master storage unit 142 by using inputted article information as a key, and an operating information creation unit 125 creating operating information based on the set found in retrieval.
    Type: Application
    Filed: March 28, 2002
    Publication date: October 3, 2002
    Applicant: Fujitsu Limited
    Inventor: Masamichi Ishii
  • Method and device generating data input to an electromagnetic field intensity calculating device
    Publication number: 20020140435
    Abstract: A method, which generates data input to a device calculating the intensity of an electromagnetic field emitted from an electric circuit device, extracts surface data of a metal cabinet from the three-dimensional data of the electric circuit device, partitions the surface corresponding to the surface data into quadrilateral meshes, and outputs the data partitioned into meshes to the electromagnetic field intensity calculating device.
    Type: Application
    Filed: January 29, 2002
    Publication date: October 3, 2002
    Applicant: Fujitsu Limited
    Inventors: Sekiji Nishino, Takeshi Kishimoto
  • Process of automatically generating translation- example dictionary, program product, computer-readable recording medium and apparatus for performing thereof
    Publication number: 20020143537
    Abstract: A process of creating a translation-example dictionary for an Example-based Machine Translation is provided. The process of the invention includes the steps of: a) comparing first translation-example information and another first translation-example information to detect if there is any differing portion; specifying a word class of each of differing portions, if any, detected in the step a); c) generating variables by linking the at least one differing portion detected in the step a) and the word class specified in the step b) so as to create second translation-example information; and d) registering the second translation-example information into the translation-example dictionary.
    Type: Application
    Filed: August 31, 2001
    Publication date: October 3, 2002
    Applicant: Fujitsu Limited of Kawasaki, Japan
    Inventors: Hitoshi Ozawa, Kyoko Kawazu
  • Method and device for driving AC type PDP
    Publication number: 20020140639
    Abstract: A method for driving a PDP is provided in which addressing having little influence from operating environment changes is realized without increasing withstand voltage of circuit components, so that a display is stabilized. The method comprises the step of keeping a scan electrode in high impedance state to a power source line over a part or the entire period of a selection waiting period before the scan electrode is biased to a selection potential level.
    Type: Application
    Filed: September 10, 2001
    Publication date: October 3, 2002
    Applicant: FUJITSU LIMITED
    Inventor: Koichi Sakita