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公开(公告)号：JPH11316265A
公开(公告)日：1999-11-16
申请号：JP3826099
申请日：1999-02-17
Applicant: IBM
Inventor： EVANS RICHARD JAMES , KASH JEFFREY ALAN , KNEBEL DANIEL RAY , NIGH PHILLIP J , SANDA PIA NAOKO , TSANG JAMES CHEN-HSIANG , VALLETT DAVID PAUL
IPC: G01R31/302 , G01R31/311
Abstract: PROBLEM TO BE SOLVED: To identify the specific place of a device by selecting and supplying logic input for a circuit that allows a navigating element to be switched, and by fetching the image of light emission being generated according to the result of the switching when processing the logic input. SOLUTION: The logic design concept of a circuit is used, a specific input value for triggering a navigating device or a device near the navigating device is selected, and the specific input value is supplied to a chip for performing logic operation in a circuit device. The devices emit light by switching, and the place and time of each switching operation is stored into the memory of a test device. A designer can estimate a specific device to be switched at a specific point of time in the process of a known input value according to the logic design concept of the circuit. When the circuit completes the processing of the input value, the designer can examine the fetched image of a chip in a specific step during the process where it is judged that the navigating device or the nearby device is switched, thus determining the position of the device.
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公开(公告)号：JPH11311662A
公开(公告)日：1999-11-09
申请号：JP2990199
申请日：1999-02-08
Applicant: IBM
Inventor： KASH JEFFREY ALAN , KNEBEL DANIEL R , SANDA PIA NAOKO , TSANG JAMES CHEN-HSIANG
IPC: G01R31/302 , G01R31/311
Abstract: PROBLEM TO BE SOLVED: To reduce the calculation time for data analysis, by using a small memory and making more structured than a list mode or a histogram mode. SOLUTION: The non-loss reduction of a memory required for storing data generated from time decomposition optical transmission is acquired by accumulating data representing coordinates X, Y, t, and the number of photons (n) in the coordinate X, Y, t in a histogram mode. One algorithm compressing the data from the list mode into the shape primarily classifies list data so that all the photons having the same coordinates (X, Y, t) from the whole repeating are made a group together. It provides an easy means for counting the number of (n). In the case where it is n>0, the result is stored as the number of the photons (n) having the value (X, Y, t). The storing technical method has advantage holding the all parts of information in raw data without loss of the information.
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公开(公告)号：DE69922860T2
公开(公告)日：2005-12-15
申请号：DE69922860
申请日：1999-02-08
Applicant: IBM
Inventor： EVANS RICHARD JAMES , KASH JEFFREY ALAN , KNEBEL DANIEL RAY , NIGH PHILLIP J , SANDA PIA NAOKO , TSANG JAMES CHEN-HSIANG , VALLETT DAVID PAUL
IPC: G01R31/302 , G01R31/311 , G01R31/27 , G01R31/28 , G01R31/265 , G01R31/26
Abstract: A system and method for determining the location of a particular device on an integrated circuit chip is described. The system and method utilize apparatus for detecting the emission of light during switching events of devices in the circuit during the circuit's processing of an input calculated to actuate the device whose location is desired. Light emissions from the circuit can be temporally and spatially indexed so as to allow deduction, in combination with the a priori knowledge of the logical operation of the circuit, of the location of the desired element. In another embodiment of the invention, a series of images of the circuit can be accumulated, representing the circuit's response to a series of different input signals, each input signal being designed to result in the switching of the desired element. The series of images can be compared to determine the location of the desired element. Also in accordance with the invention, the elements to be located can be either actual functional circuit elements, or fiducials added to the chip for test purposes.
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公开(公告)号：DE69922860D1
公开(公告)日：2005-02-03
申请号：DE69922860
申请日：1999-02-08
Applicant: IBM
Inventor： EVANS RICHARD JAMES , KASH JEFFREY ALAN , KNEBEL DANIEL RAY , NIGH PHILLIP J , SANDA PIA NAOKO , TSANG JAMES CHEN-HSIANG , VALLETT DAVID PAUL
IPC: G01R31/302 , G01R31/311 , G01R31/27 , G01R31/28 , G01R31/265 , G01R31/26
Abstract: A system and method for determining the location of a particular device on an integrated circuit chip is described. The system and method utilize apparatus for detecting the emission of light during switching events of devices in the circuit during the circuit's processing of an input calculated to actuate the device whose location is desired. Light emissions from the circuit can be temporally and spatially indexed so as to allow deduction, in combination with the a priori knowledge of the logical operation of the circuit, of the location of the desired element. In another embodiment of the invention, a series of images of the circuit can be accumulated, representing the circuit's response to a series of different input signals, each input signal being designed to result in the switching of the desired element. The series of images can be compared to determine the location of the desired element. Also in accordance with the invention, the elements to be located can be either actual functional circuit elements, or fiducials added to the chip for test purposes.
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公开(公告)号：DE69601388D1
公开(公告)日：1999-03-04
申请号：DE69601388
申请日：1996-04-09
Applicant: IBM
Inventor： KASH JEFFREY ALAN , PEZESHKI BARDIA , TONG FRANKLIN FUK-KAY
Abstract: The asymmetric dual waveguide laser structure oscillates light in a single longitudinal mode. The structure has a pair of coupled but dissimilar waveguides that are collinear with each other. The waveguides are of such a length that frequency selective coupling between them can discriminate between wavelengths corresp. to different longitudinal modes. Each waveguide has semiconductor material capable of providing optical gain when electrically excited to therefore form a lasing medium. A pair of mirrors are placed at opposite ends of the waveguides with one waveguide having a mirror on its left side and the other waveguide having a mirror on its right side, thus providing feedback for laser oscillation. A mirror is in contact with and separates the pair of waveguides, so that only the light coupled between the pair of waveguides experiences net optical gain.
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Patent Agency Ranking
公开(公告)号：DE69627086T2
公开(公告)日：2004-02-26
申请号：DE69627086
申请日：1996-08-19
Applicant: IBM
Inventor： AGAHI FARID , PEZESHKI BARDIA , KASH JEFFREY ALAN , WELSER JEFFREY JOHN
Abstract: This invention describes how commercial silicon-on-insulator material can be used to fabricate both wavelength filters and wavelength-selective photodetectors. The silicon-on-insulator substrates (100) have a buried silicon dioxide layer (102) and a thin top silicon layer (104) and are manufactured for high speed electronics applications. However, in this invention, the thin silicon layer (104) is used as the core of a waveguide and the buried silicon dioxide (102) as a lower cladding region. Another cladding layer (106) and a low index waveguide (108) is fabricated on the commercial substrate to form an asymmetric waveguide coupler structure. The added low index waveguide (108) and the original thin silicon layer (104) form the two waveguides of the coupler. Since the two waveguide materials have very different indices of refraction, they are only phase-matched at one wavelength (111). Thus for a given thickness of materials, only one wavelength (111) couples between the two waveguides (104, 108). By adding an absorptive layer in the silicon waveguide and electrical contacts, wavelength sensitive photodetection is obtained. The buried insulator layer (102) is the key to device operation, providing a very low index buried cladding region.
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公开(公告)号：DE3675281D1
公开(公告)日：1990-12-06
申请号：DE3675281
申请日：1986-06-03
Applicant: IBM
Inventor： KASH JEFFREY ALAN , KUECH THOMAS FRANCIS
IPC: H01L31/0264 , H01L21/205 , H01L31/00 , H01L31/0368 , H01L31/08 , H01L31/18
Abstract: Picosecond response photoconductors and photoresponsive elements can be provided that retain high carrier mobility and yet have short lifetime by providing on a crystal mismatched substrate (1) a textured layer (2) of domain regions (3) wherein the domain size is such that the lifetime (t) is proportional to the square of the size (S²) divided by the diffusion coefficient (D) of the semiconductor (i.e. t ≈ S²/D) material. The crystalline orientation in the domains with respect to the substrate is maintained. An embodiment is an approximately 0.1 micron thick textured layer of GaAs (2) grown on a hexagonal monocrystalline Al₂O₃ substrate (1) having domains approximately 1.0 micron with a carrier lifetime about 5 picoseconds and a carrier mobility of about 80 cm² volt⁻¹ sec⁻¹.
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公开(公告)号：DE69627086D1
公开(公告)日：2003-05-08
申请号：DE69627086
申请日：1996-08-19
Applicant: IBM
Inventor： AGAHI FARID , PEZESHKI BARDIA , KASH JEFFREY ALAN , WELSER JEFFREY JOHN
Abstract: This invention describes how commercial silicon-on-insulator material can be used to fabricate both wavelength filters and wavelength-selective photodetectors. The silicon-on-insulator substrates (100) have a buried silicon dioxide layer (102) and a thin top silicon layer (104) and are manufactured for high speed electronics applications. However, in this invention, the thin silicon layer (104) is used as the core of a waveguide and the buried silicon dioxide (102) as a lower cladding region. Another cladding layer (106) and a low index waveguide (108) is fabricated on the commercial substrate to form an asymmetric waveguide coupler structure. The added low index waveguide (108) and the original thin silicon layer (104) form the two waveguides of the coupler. Since the two waveguide materials have very different indices of refraction, they are only phase-matched at one wavelength (111). Thus for a given thickness of materials, only one wavelength (111) couples between the two waveguides (104, 108). By adding an absorptive layer in the silicon waveguide and electrical contacts, wavelength sensitive photodetection is obtained. The buried insulator layer (102) is the key to device operation, providing a very low index buried cladding region.
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公开(公告)号：DE69601388T2
公开(公告)日：1999-09-02
申请号：DE69601388
申请日：1996-04-09
Applicant: IBM
Inventor： KASH JEFFREY ALAN , PEZESHKI BARDIA , TONG FRANKLIN FUK-KAY
Abstract: The asymmetric dual waveguide laser structure oscillates light in a single longitudinal mode. The structure has a pair of coupled but dissimilar waveguides that are collinear with each other. The waveguides are of such a length that frequency selective coupling between them can discriminate between wavelengths corresp. to different longitudinal modes. Each waveguide has semiconductor material capable of providing optical gain when electrically excited to therefore form a lasing medium. A pair of mirrors are placed at opposite ends of the waveguides with one waveguide having a mirror on its left side and the other waveguide having a mirror on its right side, thus providing feedback for laser oscillation. A mirror is in contact with and separates the pair of waveguides, so that only the light coupled between the pair of waveguides experiences net optical gain.
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公开(公告)号：DE3669594D1
公开(公告)日：1990-04-19
申请号：DE3669594
申请日：1986-07-29
Applicant: IBM
IPC: H01L21/66 , G01R31/26 , G01R31/265 , G01R31/302 , G01R31/308 , G01R31/28
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