Corning Incorporated
DISPLAY ARTICLES WITH DIFFRACTIVE, ANTIGLARE SURFACES AND THIN, DURABLE ANTIREFLECTION COATINGS

Abstract:

A display article is described herein that includes: a substrate comprising a thickness and primary surface; a diffractive surface region defined by the primary surface; and an antireflective coating disposed on the diffractive surface region. The diffractive surface region comprises structural features that comprise different heights in a multimodal distribution. The substrate exhibits a sparkle of <4%, and a transmittance haze of <20%, each from an incident angle of 0.degree.. The antireflection coating comprises a plurality of alternating high refractive index and low refractive index layers. Further, each of the low index layers comprises a refractive index of .ltoreq.about 1.8, and each of the high index layers comprises a refractive index of >1.8. The article exhibits a first-surface average visible specular reflectance of less than 0.2% at an incident angle of 20.degree., and a maximum hardness of .gtoreq.8 GPa in a Berkovich Indenter Hardness Test.