A cover member for an input device is disposed on a front-surface side of a display device in the input device includes recesses and protrusions on at least one principal surface. In the principal surface having recesses and protrusions, when a cutoff value for a high-pass filter λc is set to 1.6 times the pitch of the recesses and protrusions of a measured cross-sectional curve and a cutoff value for a low-pass filter λs is set to 25 μm, the maximum roughness height Rz of the recesses and protrusions is 3-1000 nm and the pitch RSm of the recesses and protrusions is 50-1000 μm, and when the cutoff value of the high-pass filter λc is set to 25 μm, the three-dimensional arithmetic mean height Sa of the recesses and protrusions is 1-50 nm and the pitch RSm of the recesses and protrusions is 0.01-10 μm.

A glass substrate for high-frequency devices includes, in terms of molar percentage based on oxides: one or more alkaline-earth metal oxides in a total amount of 0.1 to 13%; Al.sub.2O.sub.3 and B.sub.2O.sub.3 in a total amount of 1 to 40%, in which a molar ratio of the contents represented by Al.sub.2O.sub.3/(Al.sub.2,O.sub.3+B.sub.2O.sub.3) is 0 to 0.45; at least one oxide selected from the group consisting of Sc.sub.2O.sub.3, TiO.sub.2, ZnO, Ga.sub.2O.sub.3, GeO.sub.2, Y.sub.2O.sub.3, ZrO.sub.2, Nb.sub.2O.sub.5, In.sub.2O.sub.3, TeO.sub.2, HfO.sub.2, Ta.sub.2O.sub.5, WO.sub.3, Bi.sub.2O.sub.3, La.sub.2O.sub.3, Gd.sub.2O.sub.3, Yb.sub.2O.sub.3, and Lu.sub.2O.sub.3, in a total amount of 0.1 to 1.0%; and SiO.sub.2 as a main component. The glass substrate has a dielectric dissipation factor at 35 GHz of 0.007 or less.

Smoothness of glass is improved. A polishing slurry (A) contains amorphous carbon and water, and a total amount of the amorphous carbon and the water is equal to or more than 90% of the whole polishing slurry in terms of mass ratio.

Articles and methods of making articles, for example glass articles, comprising a thin sheet and a carrier, wherein the thin sheet and carrier are bonded together using a multilayered modification (coating) layer, for example an alternating cationic/anionic polymer coating layer, and associated deposition methods, the carrier, or both, to control van der Waals, hydrogen and covalent bonding between the thin sheet and the carrier. The modification layer bonds the thin sheet and carrier together with sufficient bond strength to prevent delamination of the thin sheet and the carrier during high temperature (≤400° C.) processing while also preventing formation of a permanent bond between the sheets during such processing.

A glass substrate for a high-frequency device, which contains, in terms of mole percent on the basis of oxides: 40 to 75% of SiO.sub.2; 0 to 15% of Al.sub.2O.sub.3; 13 to 23% of B.sub.2O.sub.3; 2.5 to 11% of MgO; and 0 to 13% of CaO, and having a total content of alkali metal oxides in the range of 0.001-5%, where at least one main surface of the glass substrate has a surface roughness of 1.5 um or less in terms of arithmetic average roughness Ra. and the glass substrate has a dielectric dissipation factor at 35 GHz of 0.007 or less.

Manufacturing method of the glass substrate suitable for flat panel display having upper and lower major surfaces. While the glass substrate is conveyed, the lower surface is treated by two continuous process steps; i) contact with dry HF gas, where the dry HF gas can be generated by atmospheric pressure plasma enhancement, and ii) contact with wet aqueous solution including HF, to achieve average surface roughness determined by AFM to be in a range of 0.5 to 1.5 nm.

An antiglare glass substrate includes a glass substrate having a first main surface and a second main surface that is opposite to the first main surface. The first main surface has undergone an antiglare treatment and a fluorine-containing organosilicon compound coating film as an antifouling film is laminated thereon. The first main surface partly includes a non-antiglare-treated portion that has not undergone the antiglare treatment. The non-antiglare-treated portion has a surface roughness Ra of less than 10 nm. A difference in height along a plate thickness direction of the glass substrate between the antiglare-treated portion that has undergone the antiglare treatment and the non-antiglare-treated portion is 10

The present invention relates to a glass substrate for a high-frequency device, which includes SiO.sub.2 as a main component, the glass substrate having a total content of alkali metal oxides in the range of 0.001-5% in terms of mole percent on the basis of oxides, the alkali metal oxides having a molar ratio represented by Na.sub.2O/(Na.sub.2O+K.sub.2O) in the range of 0.01-0.99, and the glass substrate having a total content of Al.sub.2O.sub.3 and B.sub.2O.sub.3 in the range of 1-40% in terms of mole percent on the basis of oxides and having a molar ratio represented by Al.sub.2O.sub.3/(Al.sub.2O.sub.3+B.sub.2O.sub.3) in the range of 0-0.45, in which at least one main surface of the glass substrate has a surface roughness of 1.5 nm or less in terms of arithmetic average roughness Ra, and the glass substrate has a dielectric dissipation factor at 35 GHz of 0.007 or less.

A substrate includes a first surface area; and a second surface area with a second roughness value. In a height profile of the substrate along a cutting line crossing the first surface area and the second surface area, a height of the substrate along a first section of the height profile is larger than the height of the substrate along a second section of the height profile. In the height profile an absolute value of a height difference between a point of maximum height or an averaged height, respectively, of the second section and a point of minimal height or an averaged height, respectively, of the first section defines a depth value. A ratio of the depth value and the second roughness value is between 2 and 35. A marking element extends across the first surface area and the second surface area.

The invention concerns a trim element for a motor vehicle comprising at least one glass sheet having an absorption coefficient lower than 5 m.sup.1 in the wavelength range from 1051 nm to 1650 nm and having an external and an internal faces. According to the present invention, an infrared-based remote sensing device in the wavelength range from 1051 nm to 1650 nm, is placed behind the internal face of the glass sheet.