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公开(公告)号：DE69106537D1
公开(公告)日：1995-02-23
申请号：DE69106537
申请日：1991-01-18
Applicant: IBM
Inventor： CHEN CHENGJUN JULIAN , VON GUTFELD ROBERT JACOB
Abstract: The invention comprises a two step method for the repair of "opens" (4) in an electronic circuit wherein initially the open is contacted with a plating solution (5) and a high frequency current is passed through the ends of the open in the circuit with the plating solution enabling the current to complete the path. Metal growth commences between the ends of the open to form a near open. Then the repair is completed by contacting the site with a high speed plating solution and applying a low frequency current.
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Patent Agency Ranking
公开(公告)号：DE69106537T2
公开(公告)日：1995-07-06
申请号：DE69106537
申请日：1991-01-18
Applicant: IBM
Inventor： CHEN CHENGJUN JULIAN , VON GUTFELD ROBERT JACOB
Abstract: The invention comprises a two step method for the repair of "opens" (4) in an electronic circuit wherein initially the open is contacted with a plating solution (5) and a high frequency current is passed through the ends of the open in the circuit with the plating solution enabling the current to complete the path. Metal growth commences between the ends of the open to form a near open. Then the repair is completed by contacting the site with a high speed plating solution and applying a low frequency current.
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公开(公告)号：DE69416238T2
公开(公告)日：1999-09-02
申请号：DE69416238
申请日：1994-09-19
Applicant: IBM
Inventor： CHANG IFAY F , CHEN CHENGJUN JULIAN
Abstract: The present invention comprises a standard CRT that has a light source provided by two strips of light patterns in the unused area of the CRT screen, typically at the right and left margins. In a preferred embodiment, the light patterns are created by a simple electronic circuit that is used in conjunction with the raster scan of the screen. No external light sources are required. The light patterns are created in a novel way in that they have a unique pattern frequency which is determined by causing the raster scan to create a point of light at the margins during certain raster cycles but not during others. The light pattern frequency is selected to be easily discriminated, such that the environmental disturbance and the signal from the CRT itself can be completely rejected. The light patterns are reflected from the unused areas of the CRT screen by reflective surfaces. The reflective surfaces are positions in proximity to the strips of light patterns and reflect the light across the surface of the CRT. Four single photodetectors located at the four corners of the CRT screen are used as detectors to monitor the reflected light. A pointer positioned on or near the surface of the CRT will block the light in such a way that two or more of the sensors can provide enough information to determine the pointer position by using geometry.
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公开(公告)号：IN188257B
公开(公告)日：2002-08-31
申请号：IN1319DE1993
申请日：1993-11-23
Applicant: IBM
Inventor： CHANG IFAY F , CHEN CHENGJUN JULIAN
IPC: H01L19/00
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公开(公告)号：DE69416238D1
公开(公告)日：1999-03-11
申请号：DE69416238
申请日：1994-09-19
Applicant: IBM
Inventor： CHANG IFAY F , CHEN CHENGJUN JULIAN
Abstract: The present invention comprises a standard CRT that has a light source provided by two strips of light patterns in the unused area of the CRT screen, typically at the right and left margins. In a preferred embodiment, the light patterns are created by a simple electronic circuit that is used in conjunction with the raster scan of the screen. No external light sources are required. The light patterns are created in a novel way in that they have a unique pattern frequency which is determined by causing the raster scan to create a point of light at the margins during certain raster cycles but not during others. The light pattern frequency is selected to be easily discriminated, such that the environmental disturbance and the signal from the CRT itself can be completely rejected. The light patterns are reflected from the unused areas of the CRT screen by reflective surfaces. The reflective surfaces are positions in proximity to the strips of light patterns and reflect the light across the surface of the CRT. Four single photodetectors located at the four corners of the CRT screen are used as detectors to monitor the reflected light. A pointer positioned on or near the surface of the CRT will block the light in such a way that two or more of the sensors can provide enough information to determine the pointer position by using geometry.
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公开(公告)号：AT176344T
公开(公告)日：1999-02-15
申请号：AT94114713
申请日：1994-09-19
Applicant: IBM
Inventor： CHANG IFAY F , CHEN CHENGJUN JULIAN
Abstract: The present invention comprises a standard CRT that has a light source provided by two strips of light patterns in the unused area of the CRT screen, typically at the right and left margins. In a preferred embodiment, the light patterns are created by a simple electronic circuit that is used in conjunction with the raster scan of the screen. No external light sources are required. The light patterns are created in a novel way in that they have a unique pattern frequency which is determined by causing the raster scan to create a point of light at the margins during certain raster cycles but not during others. The light pattern frequency is selected to be easily discriminated, such that the environmental disturbance and the signal from the CRT itself can be completely rejected. The light patterns are reflected from the unused areas of the CRT screen by reflective surfaces. The reflective surfaces are positions in proximity to the strips of light patterns and reflect the light across the surface of the CRT. Four single photodetectors located at the four corners of the CRT screen are used as detectors to monitor the reflected light. A pointer positioned on or near the surface of the CRT will block the light in such a way that two or more of the sensors can provide enough information to determine the pointer position by using geometry.
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