Display technologies are advancing rapidly and color gamut is a key differentiator. Quantum dot enhancement films (QDEF) that significantly extend the color gamut are becoming more economically viable and production of support technologies becomes a critical barrier to entry. One important support system is the brightness enhancement films (BEF). BEF layers increase the brightness of back lights resulting in power savings or thermal management. A typical LCD panel using quantum dots [1] is shown in Figure 1. The BEF film lies between the quantum dot enhancement film and the double brightness enhancement film (DBEF). Typical BEF films used in standard LCD technology have groove pitch spacing of 50 micrometers, but QDEF technology requires very fine pitch spacing of less than 15 micrometers. This reduction in pitch spacing is beyond the reach of commercially available production technologies. This paper addresses the challenges and solutions associated with the fabrication of fine pitch, veegroove patterns for BEF film production.
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