Patents by Inventor Junji Isohata
Junji Isohata 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: 7193684Abstract: A projection exposure mask including a first mask pattern for exposing a member to form a continuous pattern thereon, and a second mask pattern for exposing the member to form a discontinuous pattern thereon. One of the first and second mask patterns is a reflecting type mask pattern and the other mask pattern is a transmitting type mask pattern.Type: GrantFiled: January 13, 2006Date of Patent: March 20, 2007Assignee: Canon Kabushiki KaishaInventors: Kazuo Iizuka, Junji Isohata, Nobuyoshi Tanaka
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Patent number: 7158210Abstract: A projection exposure apparatus with a small size and low cost suitable for repeated pattern exposure. The apparatus includes an illumination system which irradiates light to a mask including plural columns of a mask pattern for repeated exposure to a member to form plural columns of an exposure pattern, a projection system which projects light from the mask onto the member, an exposure stage which moves the member, and a mask stage which moves the mask. The light irradiation and step driving of the exposure stage for moving the member by a movement amount equal to n times a pitch of the columns of the exposure pattern are alternately performed. The mask is moved by a movement amount equal to n times a pitch of the columns of the mask pattern with step driving of the exposure stage in early and later phases of the repeated exposure.Type: GrantFiled: January 23, 2004Date of Patent: January 2, 2007Assignee: Canon Kabushiki KaishaInventors: Kazuo Iizuka, Junji Isohata, Nobuyoshi Tanaka
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Publication number: 20060119819Abstract: A projection exposure mask including a first mask pattern for exposing a member to form a continuous pattern thereon, and a second mask pattern for exposing the member to form a discontinuous pattern thereon. One of the first and second mask patterns is a reflecting type mask pattern and the other mask pattern is a transmitting type mask pattern.Type: ApplicationFiled: January 13, 2006Publication date: June 8, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Kazuo Iizuka, Junji Isohata, Nobuyoshi Tanaka
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Patent number: 7030962Abstract: A projection exposure apparatus includes a projection exposure mask. The projection exposure mask includes a first mask pattern for exposing a member to form a continuous pattern thereon and a second mask pattern for exposing the member to form a discontinuous pattern thereon, one of the first and second mask patterns being a reflecting type mask and the other mask pattern being a transmitting type mask pattern, a projection system which projects light from the reflecting type mask pattern and light from the transmitting type mask pattern onto the member, a first illumination system which irradiates light to the reflecting type mask pattern from one side of the projection exposure mask, a second illumination system which irradiates light to the transmitting type mask pattern from the opposite side of the one side of the projection exposure mask, and a substrate stage which moves the member in a direction substantially orthogonal to a projection light axis of the projection system.Type: GrantFiled: January 23, 2004Date of Patent: April 18, 2006Assignee: Canon Kabushiki KaishaInventors: Kazuo Iizuka, Junji Isohata, Nobuyoshi Tanaka
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Publication number: 20040150805Abstract: A projection exposure apparatus with a small size and low cost suitable for repeated pattern exposure is disclosed. The apparatus comprises an illumination system which irradiates light to a mask including plural columns of a mask pattern for repeated exposure to a member to form plural columns of an exposure pattern, a projection system which projects light from the mask onto the member, an exposure stage which moves the member, and a mask stage which moves the mask. The light irradiation and step driving of the exposure stage for moving the member by a movement amount equal to n times a pitch of the columns of the exposure pattern are alternately performed. The mask is moved by a movement amount equal to n times a pitch of the columns of the mask pattern with step driving of the exposure stage in an early and later phases of the repeated exposure.Type: ApplicationFiled: January 23, 2004Publication date: August 5, 2004Applicant: Canon Kabushiki KaishaInventors: Kazuo Iizuka, Junji Isohata, Nobuyoshi Tanaka
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Publication number: 20040150804Abstract: A projection exposure mask with a small size and low cost for exposing a member to form a continuous pattern and a discontinuous pattern thereon is disclosed. The projection exposure mask has a first mask pattern for exposing the member to form the continuous pattern thereon and a second mask pattern for exposing the member to form the discontinuous pattern thereon. One of the first and second mask patterns is a reflecting type mask pattern, and the other mask pattern is a transmitting mask pattern.Type: ApplicationFiled: January 23, 2004Publication date: August 5, 2004Applicant: Canon Kabushiki KaishaInventors: Kazuo Iizuka, Junji Isohata, Nobuyoshi Tanaka
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Patent number: 5359389Abstract: Disclosed are an exposure apparatus and process, including a holding unit for holding first and second objects such as a mask and a substrate, a first illumination system for illuminating the first object with an exposure light, a projection optical system for forming an image of a portion such as a pattern portion of the first object illuminated with the exposure light onto the second object and a second illumination system for illuminating a portion such as peripheral portion of the second object held by the holding unit outside of a portion of the second object illuminated with the exposure light from the first illumination system.Type: GrantFiled: October 13, 1993Date of Patent: October 25, 1994Assignee: Canon Kabushiki KaishaInventor: Junji Isohata
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Patent number: 5150152Abstract: An exposure apparatus for exposing an exposure member or wafer to a pattern with radiation in a step-and-repeat manner thereby to transfer images of the pattern onto different regions on a surface of the exposure member. The apparatus includes an XY stage for moving the wafer in X- and Y-directions, a .theta. stage for moving the wafer in a rotational direction relative to the XY stage, laser interferometers for measuring an amount of movement of the wafer by the XY stage, in each of the X- and Y-directions, by use of a mirror member mounted on the .theta. stage, and a carriage for carrying the XY and .theta. stages and a portion of the interferometers to move the wafer relative to an exposing system for effecting the scan-exposure on the region of the wafer. The mirror member is placed on the .theta. stage, and another portion of the interferometers is mounted on a fixed system independent of the carriage.Type: GrantFiled: September 5, 1991Date of Patent: September 22, 1992Assignee: Canon Kabushiki KaishaInventors: Junji Isohata, Shinji Tsutsui
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Patent number: 4998134Abstract: An apparatus for photolithographically transferring, onto a plate-like member a pattern corresponding to picture elements of a liquid crystal display device and a pattern corresponding to driving circuits and so on, by use of a photomask. The surface of the plate-like member is divided into different areas and, each time one of the different areas of the plate-like member is subjected to the pattern transfer operation, the plate-like member is fed stepwise relative to an optical system provided to project an image of the photomask onto the plate-like member. At the same time, the range of the photomask pattern which is to be transferred onto the plate-like member is changed.Type: GrantFiled: July 21, 1989Date of Patent: March 5, 1991Assignee: Canon Kabushiki KaishaInventors: Junji Isohata, Koichi Matsushita, Hironori Yamamoto, Makoto Miyazaki, Kunitaka Ozawa, Hideki Yoshinari
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Patent number: 4878086Abstract: A flat panel display device, such as a liquid crystal panel display device, of large size and a method and apparatus of manufacture of the same. The display device may be provided by discrete or divided display sections. For the manufacture of the panel display device, a pattern for forming picture elements and a drive circuit therefor is photolithographically transferred onto the whole surface of a substrate or base plate in a step-and-repeat manner. In one aspect of the invention, different masks having patterns corresponding to portions of the first-mentioned pattern are used. After the pattern of one of the masks is transferred onto one portion of the substrate, the one mask is replaced by another which the substrate is moved stepwise so that the pattern of the other mask can be transferred onto another portion of the substrate.Type: GrantFiled: March 20, 1988Date of Patent: October 31, 1989Assignee: Canon Kabushiki KaishaInventors: Junji Isohata, Masao Totsuka, Yoshiharu Nakamura
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Patent number: 4864360Abstract: An apparatus for photolithographically transferring, onto a plate-like member a pattern corresponding to picture elements of a liquid crystal display device and a pattern corresponding to driving circuits and so on, by use of a photomask. The surface of the plate-like member is divided into different areas and, each time one of the different areas of the plate-like member is subjected to the pattern transfer operation, the plate-like member is fed stepwise relative to an optical system provided to project an image of the photomask onto the plate-like member. At the same time, the range of the photomask pattern which is to be transferred onto the plate-like member is changed.Type: GrantFiled: April 5, 1988Date of Patent: September 5, 1989Assignee: Canon Kabushiki KaishaInventors: Junji Isohata, Koichi Matsushita, Hironori Yamamoto, Makoto Miyazaki, Kunitaka Ozawa, Hideki Yoshinari
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Patent number: 4814830Abstract: A flat panel display device, such as a liquid crystal panel display device, of large size and a method and apparatus of manufacture of the same. The display device may be provided by discrete or divided display sections. For the manufacture of the panel display device, a pattern for forming picture elements and a drive circuit therefor is photolithographically transferred onto the whole surface of a substrate or base plate in a step-and-repeat manner. In one aspect of the invention, different masks having patterns corresponding to portions of the first-mentioned pattern are used. After the pattern of one of the masks is transferred onto one portion of the substrate, the one mask is replaced by another which the substrate is moved stepwise so that the pattern of the other mask can be transferred onto another portion of the substrate.Type: GrantFiled: June 1, 1988Date of Patent: March 21, 1989Assignee: Canon Kabushiki KaishaInventors: Junji Isohata, Masao Totsuka, Yoshiharu Nakamura
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Patent number: 4768064Abstract: A conveyor device for alignment in which minutely displaceable members and hydraulic fluid supply pads are disposed between a slide and a guide. The relative position of the slide and the guide is adjusted by controlling the dimension of the minutely displaceable members.Type: GrantFiled: December 28, 1987Date of Patent: August 30, 1988Assignee: Canon Kabushiki KaishaInventors: Junji Isohata, Mikio Nakasugi, Takao Yokomatsu
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Patent number: 4749867Abstract: An exposure apparatus for exposing in a step-and-scan manner a plate-like member to a pattern with radiation so that images of the pattern are transferred onto different regions on the plate-like member. The apparatus includes a mirror imaging optical system for projecting the image of the pattern onto the plate-like member, a carriage for scanningly moving, at the time of exposure, the plate-like member relative to the mirror imaging system, and a stage movably mounted on the carriage for step-feeding the plate-like member at the time of non-exposure so as to sequentially place the different regions of the plate-like member at an exposure station under the mirror imaging system. A locking system is provided to lock the stage relative to the carriage by use of vacuum, at the time of exposure, whereby unwanted displacement of the plate-like member relative to the carriage at the time of scanning exposure is prevented.Type: GrantFiled: April 28, 1986Date of Patent: June 7, 1988Assignee: Canon Kabushiki KaishaInventors: Koichi Matsushita, Junji Isohata, Hironori Yamamoto, Makoto Miyazaki, Kunitaka Ozawa, Hideki Yoshinari
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Patent number: 4748477Abstract: An exposure apparatus for exposing in a step-and-scan manner a plate-like member to a pattern with radiation so that images of the pattern are transferred onto different regions on the plate-like member. The exposure apparatus includes a mirror imaging optical system for projecting the image of the pattern onto the plate-like member. Also, the exposure apparatus includes a carriage for scanningly moving, at the time of exposure, the plate-like member relative to the mirror imaging optical system and a stage for step-feeding the plate-like member at the time of non-exposure so as to sequentially place the different regions of the plate-like member at an exposure station under the mirror imaging system. The stage is mounted on the carriage, and the movement of the carriage is guided by linear air-bearings.Type: GrantFiled: April 28, 1986Date of Patent: May 31, 1988Assignee: Canon Kabushiki KaishaInventors: Junji Isohata, Koichi Matsushita, Hironori Yamamoto, Makoto Miyazaki, Kunitaka Ozawa, Hideki Yoshinari
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Patent number: 4737824Abstract: A device for controlling the shape of a surface of a plate-like member such as a semiconductor wafer, includes support for supporting the plate-like member from a reverse surface thereof, a holding system for holding a portion of the reverse surface of the plate-like member on the support, and a control for controlling a pressure in a closed space which is related, when the plate-like member is supported by the support, to a portion of the reverse surface of the plate-like member other than the first-mentioned portion, such that the pressure in the closed space is changeable to be increased or decreased as compared with an initial pressure in the closed space when the plate-like member is supported by the support, to control deformation of the plate-like member to thereby control the surface shape of the plate-like member.Type: GrantFiled: October 10, 1985Date of Patent: April 12, 1988Assignee: Canon Kabushiki KaishaInventors: Fumio Sakai, Junji Isohata
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Patent number: 4708465Abstract: A position detecting device usable in an exposure apparatus for transferring an image of a first object onto a second object, for detecting the position of at least one of the first and second objects, includes a rotatable portion having a carrying portion for carrying thereon the at least one object, a first supporting member for supporting the rotatable portion, the first supporting member including a first driving system for moving the rotatable portion in a rotational direction, second supporting member for supporting the first supporting member, the second supporting member including a second driving system for moving the first supporting member in a rotational direction, and a displacement detecting system for detecting displacement of the first supporting member.Type: GrantFiled: February 27, 1987Date of Patent: November 24, 1987Assignee: Canon Kabushiki KaishaInventors: Junji Isohata, Hironori Yamamoto, Koichi Matsushita
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Patent number: 4708466Abstract: A step-and-repeat type exposure apparatus for photoprinting patterns on different portions of a workpiece, for the manufacture of a large-size pattern to be used in a panel display device, for example. Plural masks having respective patterns are used and, each time the pattern of one of the masks is transferred onto corresponding one of the portions of the workpiece, the workpiece is displaced while, on the other hand, the used mask is replaced by a subsequent mask. For the exposure of a first one of the portions of the workpiece, the first portion is aligned with a corresponding first mask, set at a reference position, by use of alignment marks provided on the first portion and the first mask. In regard to the exposure of a second one of the portions of the workpiece, the workpiece is moved while monitoring the position thereof by use of a laser interferometer, so that the second portion is brought into alignment with a second mask placed at the reference position.Type: GrantFiled: February 3, 1987Date of Patent: November 24, 1987Assignee: Canon Kabushiki KaishaInventors: Junji Isohata, Makoto Miyazaki
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Patent number: 4676630Abstract: An exposure apparatus for exposing a plate-like member to a pattern with radiation in a step-and-repeat manner thereby to transfer images of the pattern onto different regions on a surface of the plate-like member. The apparatus includes an X-Y stage for moving the plate-like member in X and Y directions, a .theta.-stage for moving the plate-like member in a .theta. (rotational) direction relative to the X-Y stage, and laser interferometers for measuring an amount of movement of the plate-like member, by the X-Y stage, in each of the X and Y directions by use of a mirror mounted on the .theta.-stage. Placement of the mirror on the .theta.-stage allows correction of yawing if it occurs during movement of the plate-like member by X-Y stage. Also, deviation of the plate-like member in the Y direction if it occurs during movement of the plate-like member by the X-Y stage in the X direction, is detected by the laser interferometers. This allows detection of a positional error of the mirror in the .theta.Type: GrantFiled: April 22, 1986Date of Patent: June 30, 1987Assignee: Canon Kabushiki KaishaInventors: Koichi Matsushita, Junji Isohata, Hironori Yamamoto, Makoto Miyazaki, Kunitaka Ozawa, Hideki Yoshinari
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Patent number: 4601560Abstract: An alignment and exposure apparatus including a mask chuck for holding a mask, a wafer chuck for holding a wafer, a projection optical system for projecting the image of the mask onto the wafer, a non-contact distance measuring gauge for measuring the distance from a reference position to the wafer without contacting the wafer, a processing unit for calculating, on the basis of the measured distance, data on the position within the depth of field of the projection optical system and to be assumed by the mask, and an adjusting unit for adjusting the position of the mask in the direction of optical axis in accordance with an output from the processing unit so as to meet the data calculated by the processing unit, whereby the mask pattern is correctly focused on the wafer in the non-contact process with respect to the wafer surface.Type: GrantFiled: July 12, 1984Date of Patent: July 22, 1986Assignee: Canon Kabushiki KaishaInventors: Junji Isohata, Tamotsu Karasawa