Probe apparatus for inspecting electrical characteristics of a microelectronic element
First Claim
1. A probe apparatus comprising:
- means for holding a microelectronic element formed on a substrate and having a plurality of pads;
a probe card having a plurality of probe needles;
means for holding said probe card;
image pick-up means for picking up images of the pads and the probe needles;
registration means for previously storing pad position information indicating pad positions of at least specified pads of said pads and needle position information indicating needle positions of at least specified probe needles of said plurality of probe needles, the needle positions being obtained by an actual measurement based on the images picked up by said image pick-up means;
a control processor for executing a task for forming imaginarily needle marks on said pads by overlapping said needle position information and the pad position information of the microelectronic element to obtain imaginary needle mark information, and a task for detecting a positional deviation between said needle marks and said pads on the basis of the imaginary needle mark information and the pad positions.
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Accused Products
Abstract
A probe apparatus for inspecting electrical characteristics of a microelectronic element formed on a substrate and having a plurality of pads including a probe card having a plurality of probe needles, an image pick-up device for picking up images of the pads and the probe needles, a registration device which previously stores pad position information indicating pad positions of at least specified of the pads and needle position information indicating needle positions of at least specified of the plurality of probe needles, the needle positions being obtained by an actual measurement based on the images picked up by the image pick-up device, and a control processor for executing a task for detecting imaginary needle marks formed on the pads by imaginarily bringing the specified probe needles and the pads corresponding thereto into contact with each other, by overlapping the first position information and the pad position information of the microelectronic element, a task for detecting positional deviation information indicating a positional deviation between the needle marks and the pads, and a task for correcting a positional deviation between the pads and the probe needles in accordance with the positional deviation information.
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Citations
17 Claims
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1. A probe apparatus comprising:
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means for holding a microelectronic element formed on a substrate and having a plurality of pads; a probe card having a plurality of probe needles; means for holding said probe card; image pick-up means for picking up images of the pads and the probe needles; registration means for previously storing pad position information indicating pad positions of at least specified pads of said pads and needle position information indicating needle positions of at least specified probe needles of said plurality of probe needles, the needle positions being obtained by an actual measurement based on the images picked up by said image pick-up means; a control processor for executing a task for forming imaginarily needle marks on said pads by overlapping said needle position information and the pad position information of the microelectronic element to obtain imaginary needle mark information, and a task for detecting a positional deviation between said needle marks and said pads on the basis of the imaginary needle mark information and the pad positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A probe apparatus comprising:
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means for holding a microelectronic element formed on a substrate and having a plurality of pads; a probe card having a plurality of probe needles; means for holding said probe card; image pick-up means for picking up images of the pads and the probe needles; registration means for previously storing pad position coordinate data indicating pad positions of at least specified pads of said pads and needle position coordinate data indicating needle positions of at least specified probe needles of said plurality of probe needles, the needle positions being obtained by an actual measurement based on the images picked up by said image pick-up means; a control processor for executing a task for forming imaginary needle marks on said pads by overlapping the needle position coordinate data and the pad position coordinate data to obtain imaginary needle mark coordinate data, and a task for detecting a positional deviation between said needle marks and said pads on the basis of the imaginary needle mark coordinate data and the pad position coordinate data to obtain positional deviation information. - View Dependent Claims (16, 17)
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Specification