Article Abstracts | July 2007
The complete article appears in the July 2007 issue of Photonics Spectra. If you do not have a copy of this issue,
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Manufacturing Large LCDs while Maintaining Yields
Automated optical inspection helps detect and classify defects and facilitates an
efficient repair process.
by Amir Peled and Ofer Saphier, Orbotech Ltd.
As thin-film transistor LCD panel makers produce increasingly larger televisions, fewer displays fit onto the glass substrate during the production process. Whereas fifteen 32-in.-wide displays fit onto an eighth-generation substrate, only six 52-in.-wide displays fit onto the same glass. The yield loss as a result of fatal defects is far greater for the substrate with the 52-in. screens.
Many of these defects, however, can be repaired. Thin-film transistor array repair systems have been widely adopted and are used to cut “shorts” (unintentional connections between conductive lines), repair “opens” (gaps in conductive lines) and weld conductive lines.
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