Patents by Inventor Tomohiko Yamamoto

Tomohiko Yamamoto 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).

  • Patent number: 7371489
    Abstract: There exist a pattern-dense region where patterns having an F-letter shape are dense and a pattern-interspersed region where small rectangular dummy patterns are interspersed. In the pattern-interspersed region, the dummy patterns are arranged in a manner that at least one dummy pattern exists in a scan target range of a mask pattern defect inspecting apparatus. With the dummy patterns formed in the pattern-interspersed region at the intervals as described above, when one scan target range is scanned by the mask pattern defect inspecting apparatus, at least one dummy pattern is included in the scan target range in the pattern-interspersed region. Therefore, mix-up of alignment in this range is prevented from occurring, which makes it possible to perform proper defect inspection.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: May 13, 2008
    Assignee: Fujitsu Limited
    Inventors: Tomohiko Yamamoto, Satoru Asai
  • Publication number: 20080030706
    Abstract: Exposure for performing patterning in which micropatterns differing in pitch exist in close vicinity to one another is handled, and micropatterns are formed with high accuracy with sufficient manufacture process margins without using a photomask complicated in manufacturing process at high manufacture cost like an alternating phase shift mask. A light intensity distribution of irradiation light constituted of double pole illuminations is formed to correspond to L&S patterns. The double pole illumination is constituted of a pair of illumination modes, and the double pole illumination is constituted of a pair of illumination modes.
    Type: Application
    Filed: December 15, 2006
    Publication date: February 7, 2008
    Applicant: FUJITSU LIMITED
    Inventor: Tomohiko Yamamoto
  • Publication number: 20070298353
    Abstract: Double exposure is performed by using a pair of photomasks, an attenuated phase shift mask or the like which is not an alternating phase shift mask, and a pattern is transferred onto a photoresist. Here, on the occasion of performing exposure with the photomask for forming a finer pattern, double pole illumination is used as an illumination system.
    Type: Application
    Filed: August 31, 2007
    Publication date: December 27, 2007
    Applicant: FUJITSU LIMITED
    Inventors: Tomohiko YAMAMOTO, Satoru ASAI
  • Publication number: 20070275331
    Abstract: A micropattern is formed with high accuracy with a sufficient manufacture process margin without using a photomask complicated in manufacture process at high manufacture cost like an alternating phase shift mask. Double exposure is performed by using a pair of photomasks such as an ordinary chrome mask, an attenuated phase shift mask or the like which is not an alternating phase shift mask, and a pattern is transferred onto a photoresist. Here, on the occasion of performing exposure with the photomask for forming a finer pattern, double pole illumination is used as an illumination system.
    Type: Application
    Filed: September 29, 2006
    Publication date: November 29, 2007
    Applicant: FUJITSU LIMITED
    Inventors: Tomohiko Yamamoto, Satoru Asai
  • Publication number: 20070146662
    Abstract: An amount is flare is measured by a method including steps of applying a photosensitive material to a substrate; exposing a part of the photosensitive material using a mask including a transmitting section which has no pattern so that the part of the photosensitive material varies in thickness; and measuring an amount of flare based on a distribution of film amounts of the photosensitive material remaining in a first region corresponding to the transmitting section and on a second region other than the first region after the step of exposing.
    Type: Application
    Filed: March 24, 2006
    Publication date: June 28, 2007
    Applicant: FUJITSU LIMITED
    Inventor: Tomohiko Yamamoto
  • Patent number: 7196683
    Abstract: In an image display device which employs pulse width modulation driving, a voltage which is less than a voltage supplied to signal lines is applied to pixel electrodes. Tones are displayed by shifting phases of waveforms of the signal lines and scanning lines, and polarities of pixels in a signal line direction are inverted alternately. This prevents increase in power consumption which is caused by pulse intervals which become too small at high tone levels, in addition to preventing change in tone level due to external factors such as temperature, or signal delays in a driver or wiring.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: March 27, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomohiko Yamamoto, Hisashi Nagata, Youji Yoshimura, Noboru Noguchi, Hideki Ichioka, Koji Fujiwara, Naoto Inoue, Keiichi Tanaka
  • Patent number: 7113158
    Abstract: An image display apparatus comprising an image display device, a shield member, and a drive mechanism. The drive mechanism drives the shield member in synchronization with display of the image.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: September 26, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kouji Fujiwara, Tomohiko Yamamoto, Keiichi Tanaka, Naoto Inoue, Hideki Ichioka
  • Publication number: 20060210930
    Abstract: There exist a pattern-dense region where patterns having an F-letter shape are dense and a pattern-interspersed region where small rectangular dummy patterns are interspersed. In the pattern-interspersed region, the dummy patterns are arranged in a manner that at least one dummy pattern exists in a scan target range of a mask pattern defect inspecting apparatus. With the dummy patterns formed in the pattern-interspersed region at the intervals as described above, when one scan target range is scanned by the mask pattern defect inspecting apparatus, at least one dummy pattern is included in the scan target range in the pattern-interspersed region. Therefore, mix-up of alignment in this range is prevented from occurring, which makes it possible to perform proper defect inspection.
    Type: Application
    Filed: May 22, 2006
    Publication date: September 21, 2006
    Applicant: FUJITSU LIMITED
    Inventors: Tomohiko Yamamoto, Satoru Asai
  • Patent number: 7088330
    Abstract: An active matrix substrate includes: a base plate; pixel electrodes formed on the base plate; pixel switching elements, each being connected to associated one of the pixel electrodes; gate lines for controlling operations of the pixel switching elements; data lines, each being connected to associated ones of the pixel electrodes by way of associated ones of the pixel switching elements so as to supply a data signal therethrough; data line switching elements, each having one of its terminals connected to associated one of the data lines; signal input terminals, each being electrically connected to another terminal at associated ones of the data line switching elements; a data line branching section provided between the signal input terminals and the data line switching elements; and a control line connected to the data line switching elements to selectively turn ON or OFF the data line switching elements.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: August 8, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisashi Nagata, Noboru Noguchi, Tomohiko Yamamoto
  • Patent number: 7075521
    Abstract: Input position is accurately detected. In an x-detection period of a non-display period, a source drive circuit simultaneously applies to all signal wiring lines a pulse of a peak value proportional to a distance from a gate drive circuit. A coordinate detection circuit obtains an x-coordinate on the basis of a voltage induced at a pen corresponding to the peak value (x-coordinate) of the applied pulse. In a y-detection period, a pulse generation circuit applies one pulse to a common line. The pen detects a potential variation in amplitude proportional to a distance (y-coordinate) from the source drive circuit, generated approximately simultaneously on all the signal wiring lines via a capacitance. The coordinate detection circuit obtains the y-coordinate similarly to the case of x-coordinate detection.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: July 11, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomohiko Yamamoto, Koji Fujiwara, Keiichi Tanaka, Naoto Inoue, Hideki Ichioka
  • Patent number: 7074524
    Abstract: There exist a pattern-dense region where patterns having an F-letter shape are dense and a pattern-interspersed region where small rectangular dummy patterns are interspersed. In the pattern-interspersed region, the dummy patterns are arranged in a manner that at least one dummy pattern exists in a scan target range of a mask pattern defect inspecting apparatus. With the dummy patterns formed in the pattern-interspersed region at the intervals as described above, when one scan target range is scanned by the mask pattern defect inspecting apparatus, at least one dummy pattern is included in the scan target range in the pattern-interspersed region. Therefore, mix-up of alignment in this range is prevented from occurring, which makes it possible to perform proper defect inspection.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: July 11, 2006
    Assignee: Fujitsu Limited
    Inventors: Tomohiko Yamamoto, Satoru Asai
  • Patent number: 7065862
    Abstract: A fixing band-tightening apparatus comprises a holding section for gripping a shaft section at both ends in an axial direction, the holding section being provided rotatably in a circumferential direction in accordance with a driving action of a rotary driving source, a stopper section arranged in a lateral direction substantially horizontal with respect to the holding section, for positioning a projection of a fixing band in the lateral direction except for a vertical direction, and a band-tightening section for forcibly nipping the projection of the fixing band positioned by the stopper section to tighten the fixing band.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: June 27, 2006
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Tomohiko Yamamoto, Satoru Kudo, Hiroshi Sato, Yasuhisa Nagayama
  • Publication number: 20060061580
    Abstract: A display device includes an ID storage section which is a read-only storage and stores a display ID being exclusive to the display device and readable by a computer. An ID judgment section judges whether or not the display device is entitled to reception of content data, based on the display ID read out from the display device. When the display device is authenticated, a communication section of a content data delivery device delivers the content data to the display device. As a result, individual authentication of the display device and selective delivery of the content data to the display device, by the content data delivery device, can be realized. Namely, it is possible to provide the display device, which ensures individual authentication, and to which content data can be selectively delivered.
    Type: Application
    Filed: September 21, 2005
    Publication date: March 23, 2006
    Inventors: Kohji Fujiwara, Tomohiko Yamamoto
  • Publication number: 20060044490
    Abstract: A display device includes a display panel, a first protection layer having viscoelasticity, and a second protection layer having an elastic modulus higher than first protection layer. The first protection layer covers one face of the display panel and the second protection layer is arranged on the first protection layer to cover the display panel.
    Type: Application
    Filed: August 31, 2005
    Publication date: March 2, 2006
    Inventors: Hideki Ichioka, Tomohiko Yamamoto
  • Publication number: 20060044287
    Abstract: A coordinate input system includes: a digitizer for indicating coordinate positions; a controller for extracting a plurality of coordinate data units from the indicated coordinate positions; a temporary storage memory for sequentially storing the extracted coordinate data units; a cosine value deriving section for defining vectors each connecting two of points associated with the respective coordinate data units and for deriving a cosine value of an angle formed by adjacent two of the vectors sandwiching a point selected from the points; and a control circuit for discarding one of the coordinate data units associated with the selected point when the cosine value is smaller than a given value and for transmitting and inputting one of the coordinate data units associated with the selected point when the cosine value is equal to or larger than the given value.
    Type: Application
    Filed: August 31, 2005
    Publication date: March 2, 2006
    Inventors: Yasunori Ake, Tomohiko Yamamoto
  • Patent number: 6977639
    Abstract: A display device is arranged in such a manner that rows on the screen on which pixel electrodes are provided in a matrix manner are sequentially selected so as to be scanned by scanning signal lines formed on a substrate, and a data signal is supplied from gray scale signal lines, which are formed on a counter substrate facing the substrate, to the pixel electrodes on the selected row, so that the display is carried out. Also, an idle period, (i) which is longer than a scanning period for scanning the screen once and (ii) during which period all scanning signal lines are in the state of non-scanning, is provided, and the scanning period and the idle period constitute one vertical period. With this arrangement, it is possible to (1) provide a driving method of a display device by which method the reduction of power consumption is sufficiently realized without causing the degradation of the display qualities, and (2) provide a display device using the same.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: December 20, 2005
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koji Fujiwara, Tomohiko Yamamoto, Keiichi Tanaka, Naoto Inoue, Hideki Ichioka
  • Publication number: 20050277035
    Abstract: An exposure measurement apparatus is configured by including a size measurer measuring respective sizes of at least a pair of transferred patterns having mutually different optimal focus positions out of a plurality of transferred patterns formed by being transferred onto a transfer object, a difference value calculator obtaining a difference value between the size of one transferred pattern and the size of the other transferred pattern, a focus variation amount calculator calculating a focus variation amount of the transfer object using the difference value, and an exposure variation amount calculator calculating an exposure error amount of a wafer.
    Type: Application
    Filed: October 27, 2004
    Publication date: December 15, 2005
    Applicant: FUJITSU LIMITED
    Inventor: Tomohiko Yamamoto
  • Publication number: 20050208392
    Abstract: Data (pattern data) (21) of a mask data (2) to form a mask pattern is made into an octagon. An electron-beam lithography system has a high resolution, and it requires a polygonal pattern data having many more vertexes such as an octagon. With the use of such a pattern data, a photomask (3) having a mask pattern (22) being an aperture closer to a circle (approximated circle) can be obtained. Backed by this, it is possible to form resist patterns at smaller pitches without causing failures in manufacturing a device such as a reduction in resist film thickness, a disconnection between actual patterns such as of contact holes, and so forth. Further, it is possible to eliminate the factor of mask manufacturing process from the optical proximity correction to simplify the optical proximity correction, so that desired macro actual patterns can be formed easily and accurately.
    Type: Application
    Filed: May 13, 2005
    Publication date: September 22, 2005
    Applicant: FUJITSU LIMITED
    Inventor: Tomohiko Yamamoto
  • Publication number: 20050206609
    Abstract: A programmable logic IC and a ROM are set in a controller section between a display and ICs (an IC for wireless communication and an IF IC). In each of plural program sets stored in the ROM, a series of operation up to the time that image data, after being read from the IC for wireless communication and converted into a logic signal, is sent to the display is described. On the other hand, the programmable logic IC changes the program set being read, according to what is displayed on the display, television images, a monitor image supplied from a computer, or image data from a memory card. This makes it possible to attain an image-display-device controller circuit that has a small circuit scale, consumes a small amount of power, and is small in size and weight are small, but can change operation.
    Type: Application
    Filed: March 17, 2005
    Publication date: September 22, 2005
    Inventors: Tomohiko Yamamoto, Kohji Fujiwara
  • Publication number: 20050069791
    Abstract: A shape value of a pattern having a pivotal characteristic is measured (step S1), an exposure energy variation is detected from the measured value, a first data base is accessed using a result of the measurement of the shape value (Step S2), an exposure energy is calculated (Step S3), a shape value of an isolated pattern is measured (Step S4), a second data base is accessed using a result of the measurement (Step S5), and a focal variation is determined using the calculated proper exposure energy (Step S6).
    Type: Application
    Filed: March 15, 2004
    Publication date: March 31, 2005
    Inventor: Tomohiko Yamamoto