A chemically toughenable or toughened glass is provided. The glass has, before chemical toughening, a thickness of at most 500 m. The glass, after chemical toughening, has a BACT (bendability and chemical toughenability) calculated as BACT=(CS*DoL)/(t*E) which is greater than 0.00050 and/or a NS (normalized stiffness) calculated as NS=CS/E which is greater than 0.0085, where CS is a compressive stress in MPa measured at one side of the glass after chemical toughening, DoL is a total depth of all ion-exchanged layers in m on one side of the glass after chemical toughening, t is a thickness of the glass in m after chemical toughening, and E is a E-modulus in MPa after chemical toughening.

The present invention relates to a cover member (1) made of chemically strengthened glass for protecting an object to be protected, the cover member (1) being characterized by: at least one recessed part (7) being provided on at least one of a first main surface (3) and a second main surface (5) of the cover member (1); the cover member (1) integrally comprising a thin part (13) formed by the recessed part and a thick part (17) connecting with the thin part (13); and, defining tensile stress as positive and compressive stress as negative, the integral value S for main stress difference in the through-thickness direction of the thin part (13) at the position of the center of gravity of the thin part being less than 0 MPa.

A multi-well glass-containing structure, and system and method to manufacture the structure are provided. The structure can be a glass plate having a well defined by a rim at a top of the plate to define a well opening, a well bottom at a bottom of the plate spaced away from the rim by a well wall extending from the rim to the well bottom. A well aspect ratio of the depth of the well to a maximum surface dimension of the well opening can be in a range from 40% to 100%. The inner surface of the well can have an average roughness, Ra, of less than 600 nm. The system can include a mold with a coefficient of thermal expansion that matches the glass-containing structure and the method can include forming the glass plate at a viscosity of about 10.sup.5 to 10.sup.7,6 poises.

The invention relates to a scattering and conductive anti-reflection surface, comprising a continuous electrically conductive material of variable thickness deposited on a textured surface so as to render the assembly anti-reflective and scattering.

The purpose of the present invention is to provide a chemically-strengthened glass exhibiting both surface strength and abrasion-resistant anti-fingerprint (AFP) properties. The present invention relates to a plate-shaped chemically-strengthened glass which has a compressive stress layer provided to a glass surface layer, a glass surface hydrogen concentration profile in a specific range, and a surface strength and abrasion-resistant anti-fingerprint (AFP) properties which are in specific ranges.

A thermo-electric method for texturing a glass surface including, for example, simultaneously heating a glass substrate to a temperature less than its glass transition temperature and applying a bias across the glass substrate using a template electrode. The applied bias at the processing temperature induces localized ion migration within the glass, which results in the formation in the glass surface of a negative topographical image of the pattern formed in the electrode.

A reflective mask blank capable of obtaining high contrast at the edges of a phase shift film pattern. Provided is a reflective mask blank comprising a multilayer reflective film and a phase shift film that shifts the phase of EUV light formed in that order on a substrate, wherein root mean square roughness (Rms), obtained by measuring a 1 m1 m region on the surface of the phase shift film with an atomic force microscope, is not more than 0.50 nm, and power spectrum density at a spatial frequency of 10 to 100 m.sup.1 is not more than 17 nm.sup.4.

A transparent article having a face provided with a nano structure, wherein a top part of the nano structure has hydrophobic properties and a remaining part of the nanostructure confers antifog properties to said face of said transparent article.

An optical material for a light guide plate has a refractive index of 1.70 or more, a thickness of 1.1 mm or less, and a waviness of a surface of less than 5010.sup.4 degrees. The optical material may have the waviness of from 1.010.sup.4 to 1010.sup.4 degrees. The optical material may contain glass.

The present invention relates to a glass plate which is provided with a first main surface, and a second main surface which faces the first main surface. An antiglare portion and a non-antiglare portion are provided to the first main surface. The average lengths (RSm) of elements of roughness curves of the antiglare portion and the non-antiglare portion are respectively 1 m or higher. The difference between the RSm of the antiglare portion and the RSm of the non-antiglare portion is 100 m or lower.