Systems, devices and methods for quality monitoring of deposited films in the formation of light emitting devices

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United States of America Patent

PATENT NO 9812672
SERIAL NO

15250283

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Abstract

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This disclosure provides techniques for assessing quality of a deposited film layer of an organic light emitting diode (“OLED”) device. An image is captured and filtered to identify a deposited layer that is to be analyzed. Image data representing this layer can be optionally converted to brightness (grayscale) data. A gradient function is then applied to emphasize discontinuities in the deposited layer. Discontinuities are then compared to one or more thresholds and used to ascertain quality of the deposited layer, with optional remedial measures then being applied. The disclosed techniques can be applied in situ, to quickly identify potential defects such as delamination before ensuing manufacturing steps are applied. In optional embodiments, remedial measures can be taken dependent on whether defects are determined to exist.

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Patent Owner(s)

  • KATEEVA, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cocca, Christopher Fremont, US 4 18

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