Patents by Inventor Nobutoshi Mizusawa

Nobutoshi Mizusawa 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: 6167111
    Abstract: An apparatus for transferring a pattern of a mask onto a substrate with radiation light from a synchrotron radiation light source, includes a first mirror for collectively reflecting radiation light from the synchrotron radiation light source, and a second mirror for reflecting radiation light from the first mirror and for projecting the same to the mask.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: December 26, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Watanabe, Shunichi Uzawa, Yasuaki Fukuda, Nobutoshi Mizusawa, Shinichi Hara
  • Patent number: 5999589
    Abstract: A substrate holding device includes a vacuum supplying device for supplying a vacuum to a holding surface to hold a substrate, a hollow member surrounding at least a portion of the holding surface and movable between a position in which the holding member protrudes from the holding surface and a position in which the hollow member does not protrude from the holding surface, and a moving mechanism for relatively moving between the hollow member and the holding surface.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: December 7, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuji Chiba, Nobutoshi Mizusawa, Kazunori Iwamoto, Yutaka Tanaka, Shinichi Hara, Mitsuji Marumo, Shin Matsui, Hiroshi Kurosawa
  • Patent number: 5883932
    Abstract: A substrate holding apparatus in which first and second vacuum clamping devices each have a holding surface for holding a portion of a substrate, a first driving device for rotating the first vacuum clamping device relative to the second vacuum clamping device, and a second driving device for reciprocally moving the first vacuum clamping device between a position in which it protrudes by a predetermined amount from the holding surface of the second vacuum clamping device and a position in which it does not protrude from that holding surface. Also disclosed is a substrate holding device in which a vacuum clamping device creates a vacuum clamp force on the holding surface thereof, a cylindrical delivering member surrounds at least a portion of the holding surface and is reciprocally movable between a position in which it protrudes by a predetermined amount from the holding surface and a position in which it does not protrude from the holding surface, and a driving device for moving the delivering member.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: March 16, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuji Chiba, Nobutoshi Mizusawa, Kazunori Iwamoto, Yutaka Tanaka, Shinichi Hara, Mitsuji Marumo, Shin Matsui, Hiroshi Kurosawa
  • Patent number: 5854819
    Abstract: There is disclosed a mask supporting device comprising a chuck mechanism for supporting a mask substrate provided with a rectangular window in which a mask pattern is formed, and a frame for reinforcing the mask substrate, and a mechanism for applying, to said frame of the mask, loads from mutually orthogonal directions. The mechanism for applying loads includes a fixed reference contacting two positions on the external periphery of the mask frame and two pressing mechanism for applying loads to the mask frame from two directions respectively opposed to the two contact positions.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: December 29, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichi Hara, Takeshi Miyachi, Nobutoshi Mizusawa, Yuji Chiba, Kazuyuki Kasumi
  • Patent number: 5825463
    Abstract: A mask and a mask supporting mechanism wherein the outside periphery of a mask frame, having a rectangular shape, which supports the mask, is supported at three supporting points which are substantially the same distance from the center line of a mask membrane, whereby the mask frame is positioned with respect to X, Y and .theta. directions. Two pressing mechanisms press the mask frame at two points substantially opposed to two of the supporting points. The mask is supported at three points on the bottom surface thereof for positioning in the Z direction.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: October 20, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichi Hara, Nobutoshi Mizusawa, Yuji Chiba
  • Patent number: 5822389
    Abstract: A synchrotron exposure includes a synchrotron radiation source for generating a synchrotron radiation beam, and exposure unit having a mask stage for holding a mask and a wafer stage for holding a waver, a beam port for directing the radiation beam to the exposure unit, a mirror unit having a mirror for reflecting the radiation beam, a pre-alignment system for aligning the wafer relative to the wafer stage, a fine-alignment system for aligning the wafer held by the wafer stage relative to the mask held by the mask stage, a mask storage apparatus for storing the mask, a wafer storage apparatus for storing the wafer, a mask conveying apparatus for conveying the mask between the mask storage apparatus and the mask stage and a wafer conveying apparatus for conveying a wafer between the wafer storage apparatus and the wafer stage.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: October 13, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shunichi Uzawa, Takao Kariya, Makoto Higomura, Nobutoshi Mizusawa, Ryuichi Ebinuma, Kohji Uda, Kunitaka Ozawa, Mitsuaki Amemiya, Eiji Sakamoto, Naoto Abe, Kenji Saitoh
  • Patent number: 5760802
    Abstract: A recording apparatus is provided with an upper unit having a recording head for discharging ink for effecting recording on a recording medium in response to information, and at least a portion of the electric circuit of the apparatus, a lower unit having a platen for maintaining the recording medium in the recording station by the recording head, the lower unit capable of being spaced apart relative to the upper unit, and a conveying member for conveying the recording medium to the recording station. The upper unit and the lower unit are capable of being spaced apart and opened in the recording station by the recording head.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: June 2, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuichi Ebinuma, Nobutoshi Mizusawa, Yuji Chiba
  • Patent number: 5641264
    Abstract: A method of controlling a conveying device having a gripping hand for gripping an article to be conveyed and a conveying mechanism for conveying the gripping hand, wherein a pressing force applied to the gripping hand through the article being conveyed is detected and the conveying operation of the conveying mechanism is stopped when the pressing force exceeds a predetermined force.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: June 24, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mitsutoshi Kuno, Hidehiko Fujioka, Nobutoshi Mizusawa, Yuji Chiba, Takao Kariya, Koji Uda, Shunichi Uzawa, Eigo Kawakami
  • Patent number: 5577552
    Abstract: A temperature controlling device suitably usable in a semiconductor microcircuit manufacturing exposure apparatus exposes a semiconductor wafer to a mask to print a pattern of the mask on the wafer. The device includes a constant-temperature liquid medium supplying system for controlling temperature of a liquid at high precision, a distributing system for distributing the supplied liquid medium into plural flow passages, to supply the liquid medium to plural subjects of control such as, for example, a mask stage, a wafer stage and the like. The device further includes a plurality of temperature controls each being provided in corresponding one of the flow passages, for correction of any variance in temperature of the distributed liquid medium, resulting from pressure loss energies in the respective flow passages. Thus, temperatures of plural subjects of control can be controlled efficiently and with a simple structure.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: November 26, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuichi Ebinuma, Takao Kariya, Nobutoshi Mizusawa, Koji Uda, Eiji Sakamoto, Shunichi Uzawa
  • Patent number: 5552812
    Abstract: A recording apparatus is provided with an upper unit having a recording head for discharging ink for effecting recording on a recording medium in response to information, and at least a portion of the electric circuit of the apparatus, a lower unit having a platen for maintaining the recording medium in the recording station by the recording head, the lower unit capable of being spaced apart relative to the upper unit, and a conveying member for conveying the recording medium to the recording station. The upper unit and the lower unit are capable of being spaced apart and opened in the recording station by the recording head. The recording apparatus further having a blower which introduces air and directs an air stream through the apparatus and past a full page width recording head. The air stream directs ink mist generated by the printhead through a recording medium discharge port such that ink mist is removed from the apparatus body by riding the air stream or by adhering to the recording medium.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 3, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuichi Ebinuma, Nobutoshi Mizusawa, Yuji Chiba
  • Patent number: 5524131
    Abstract: A semiconductor device manufacturing SOR X-ray exposure apparatus wherein, after a mask and a semiconductor wafer are aligned, and SOR X-ray is used to transfer a semiconductor device pattern on the mask onto a resist on the semiconductor wafer. The apparatus includes a mirror unit and an exposure unit for exposing the wafer through the mask to the X-ray from the mirror unit. The mirror unit includes an X-ray mirror for diverging the X-ray in a desired direction, a first chamber for providing a desired vacuum ambience around the X-ray mirror and a first supporting device for supplying the X-ray mirror. The exposure unit includes a shutter for controlling the exposure, a mask stage for holding the mask, a wafer stage for holding the wafer, a second chamber for providing a desired He ambience around the mask stage and the wafer stage, a frame structure for mounting the mask stage and the wafer stage and a second supporting device for supporting the frame structure.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: June 4, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shunichi Uzawa, Takao Kariya, Makoto Higomura, Nobutoshi Mizusawa, Ryuichi Ebinuma, Kohji Uda, Kunitaka Ozawa, Mitsuaki Amemiya, Eiji Sakamoto, Naoto Abe, Kenji Saitoh
  • Patent number: 5498501
    Abstract: A method of manufacturing of semiconductor devices, includes exposing different portions of a semiconductor substrate with a first exposure apparatus having a first exposure range; placing and aligning the semiconductor substrate with respect to a second exposure range of a second exposure apparatus, which range is larger than the first exposure range of the first exposure apparatus; detecting an alignment error of each of the portions of the semiconductor substrate as covered by the second exposure range of the second exposure apparatus; calculating an overall alignment error of those portions of the semiconductor substrate with respect to the entire second exposure range of the second exposure apparatus, on the basis of the detected alignment errors; and controlling the exposure operation of the second exposure apparatus on the basis of the calculated overall alignment error.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: March 12, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isamu Shimoda, Takao Kariya, Nobutoshi Mizusawa, Kunitaka Ozawa, Shunichi Uzawa
  • Patent number: 5485495
    Abstract: A method of producing an X-ray mask includes a step of forming a mask pattern on a mask substrate having an amount of warp, and a step of bonding the mask substrate to a mask frame. In both steps, the mask substrate maintains a shape obtained due to the amount of warp. Since the mask substrate is fixed to the mask frame in a warped state, distortion is not produced in the mask pattern. As a result, an X-ray mask, which is suitable for very precise exposure, is provided.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: January 16, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Miyachi, Nobutoshi Mizusawa, Shinichi Hara, Hiroshi Maehara
  • Patent number: 5467114
    Abstract: A recording apparatus is provided with an upper unit having a recording head for discharging ink for effecting recording on a recording medium in response to information, and at least a portion of the electric circuit of the apparatus, a lower unit having a platen for maintaining the recording medium in the recording station by the recording head, the lower unit capable of being spaced apart relative to the upper unit, and a conveying member for conveying the recording medium to the recording station. The upper unit and the lower unit are capable of being spaced apart and opened in the recording station by the recording head.
    Type: Grant
    Filed: March 17, 1995
    Date of Patent: November 14, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuichi Ebinuma, Nobutoshi Mizusawa, Yuji Chiba
  • Patent number: 5390227
    Abstract: An exposure apparatus for exposing a semiconductor wafer to a semiconductor device pattern formed in a mask. The exposure energy is, for example, X-rays contains in synchrotron orbit radiation. A blade for limiting the area irradiated with the exposure energy on a mask or wafer is integrally movable in an alignment detecting unit for detecting the alignment mark. Four of such blades are provided to provide a square exposure area. The blades are movable independently by the associated alignment detecting units. Each of the blades is finely movable relative to the associated alignment detecting unit. The shape or size or the like of the blade is determined in consideration of the position of the blade in the direction of the exposure energy irradiation, and the maximum and minimum exposure view angle. The blade is cooled. The exposure area can be changed highly accurately and efficiently with a simple structure.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: February 14, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobutoshi Mizusawa, Ryuichi Ebinuma, Takao Kariya, Isamu Shimoda, Shunichi Uzawa
  • Patent number: 5377251
    Abstract: An exposure method for manufacture of semiconductor devices, includes moving a shutter having an edge so that the edge is related to a predetermined exposure region; projecting an exposure beam to the edge of the shutter and to at least a portion of the exposure region; determining a position of a shadow of the edge of the shutter formed by the exposure beam with respect to a predetermined coordinate system related to movement of a movable chuck; adjusting the shutter in accordance with the determination; placing a substrate on the chuck; moving the chuck so that the substrate is related to the exposure region; and controlling the exposure of the substrate with the exposure beam through the shutter.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: December 27, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobutoshi Mizusawa, Ryuichi Ebinuma, Hiroshi Kurosawa, Koji Uda, Takao Kariya, Shumichi Uzawa
  • Patent number: 5365561
    Abstract: Exposure control method and apparatus particularly suitably usable in an X-ray exposure apparatus, for exposing a mask and a wafer to radiation (X-rays) from a synchrotron to transfer a pattern formed on a mask onto the wafer, is disclosed. A shutter device for controlling passage and interception of the synchrotron radiation is provided between the synchrotron and the wafer. The shutter device includes a blade member having a leading edge and a trailing edge which are rectilinearly movable in a direction in which there exists non-uniformness in illuminance of the radiation. The leading edge is used to determine the timing of start of passage of the radiation to the wafer, while the trailing edge is used to determine the timing of interception of the radiation. The moving speeds of the leading edge and the trailing edge are controlled independently of each other to provide different exposure times for different portions of an exposure region on the wafer, in accordance with the non-uniformness in illuminance.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: November 15, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuichi Ebinuma, Nobutoshi Mizusawa, Masayuki Suzuki, Shinichirou Uno, Tetsuzo Mori, Hiroshi Kurosawa
  • Patent number: 5356686
    Abstract: An X-ray mask structure includes a mask substrate having a pattern; a supporting frame for carrying and supporting the mask substrate; and an adhesive material for fixing the mask substrate to the supporting frame; wherein a stress releasing groove is formed in at least one of the mask substrate and the supporting frame.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: October 18, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidehiko Fujioka, Takeshi Miyachi, Yasuaki Fukuda, Yuji Chiba, Nobutoshi Mizusawa, Takao Kariya, Shunichi Uzawa
  • Patent number: 5317615
    Abstract: An exposure apparatus and method for exposing a workpiece to a pattern of an original with radiation includes a masking device having movable blades for variably defining an aperture to selectively block and transmit the radiation to define on the workpiece a desired exposure zone corresponding to the aperture, the masking device having a window, and a detector for detecting the positional deviation between the original and the workpiece by using light passing through the window of the masking device.
    Type: Grant
    Filed: December 8, 1992
    Date of Patent: May 31, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuichi Ebinuma, Nobutoshi Mizusawa, Takao Kariya, Shigeyuki Suda, Shunichi Uzawa, Takayuki Hasegawa
  • Patent number: 5285488
    Abstract: An exposure apparatus includes an exposure beam source for projecting a beam flux for exposure, having a non-uniform intensity distribution, toward a range including an exposure zone, set with respect to a main body of the exposure apparatus; illuminance detectors disposed at least at two points inside the exposure beam flux but outside the exposure zone; and a detecting device for detecting a change in intensity of the exposure beam and a change in relative position of the exposure zone and the exposure beam flux, on the basis of detected illuminances at the two points.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: February 8, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Watanabe, Ryuichi Ebinuma, Nobutoshi Mizusawa, Shunichi Uzawa, Takao Kariya