Memory cell and page break inspection
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United States of America Patent
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Apr 10, 2012
Grant Date -
Mar 12, 2009
app pub date -
Aug 25, 2008
filing date -
Sep 7, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A method of inspecting an array having memory blocks and page breaks. The array is imaged, and the image is divided into sections. Sections that include the memory blocks are selected into a candidate image. Pixels within a boundary horizontal line of pixels are inspected to determine horizontal edges of the memory blocks. Pixels within a boundary vertical line of pixels are inspected to determine vertical edges of the memory blocks. An image of a first memory block is compared to an image of a second memory block to determine differences. The differences are flagged as potential memory block defects. Images of the page breaks are compared to determine differences, and the differences are flagged as potential page break defects.
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