The introduction of the Candela tool to Epistar's manufacturing process provides automated inspection methods for sapphire substrates to ensure vendor quality, and provides greater visibility into the (GaN) epi process to help detect root cause defectivity and early prediction of process excursions. According to an Epistar spokesperson, "Adoption of
Substrate defects are known to impact epi process yield, and the Candela system provides increased sensitivity to these yield-limiting defects. With its proprietary optical design and detection technology, the Candela system detects and classifies sub-micron defects—including micro-cracks and -scratches, polishing and brushing streaks, and chemical residues. As LED manufacturers transition production to larger wafer sizes and introduce new patterned sapphire substrate (PSS) processes, the economic impact of resulting process-induced defects is significant. For defects occurring during the epi process steps, the Candela tool can detect hexagonal pits and bumps which can lead to electrical failure and epi cracks that can adversely impact field reliability.
"The Candela system allows LED manufacturers to conduct root cause analysis to speed process development, quickly fine tune production processes to minimize process excursions, and ultimately achieve higher yield per wafer," said
The Candela tool is now installed in Epistar's
Forward Looking Statements:
Statements in this press release other than historical facts, such as statements regarding the Candela system's expected performance, expected growth of adoption of Candela tools by LED manufacturers, and the anticipated cost, operational and other benefits realizable by users of the Candela system, are forward-looking statements, and are subject to the Safe Harbor provisions created by the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based on current information and expectations, and involve a number of risks and uncertainties. Actual results may differ materially from those projected in such statements due to various factors, including delays in the adoption of new technologies (whether due to cost or performance issues or otherwise), the introduction of competing products by other companies or unanticipated technological challenges or
limitations that affect the implementation, performance or use of
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