Provided is a substrate for transferring microstructures such as a micro LED including an engraved mark. The substrate for transferring microstructures is less likely to cause a recognizing error of the engraved mark to occur in a reading device, and makes it possible to stably and continuously read the engraved mark.

A substrate for transferring microstructures includes a synthetic quartz glass substrate and a silicone pressure-sensitive adhesive agent layer provided on a front surface of the synthetic quartz glass substrate. The substrate includes an engraved mark provided in the from surface.

A glass substrate for EUVL includes a first main surface having a rectangular shape; a second main surface having a rectangular shape on an opposite side to the first main surface; four end surfaces orthogonal to the first and second main surfaces; four first chamfered surfaces formed on boundaries between the first main surface and the end surfaces; and four second chamfered surfaces formed on boundaries between the second main surface and the end surfaces. The glass substrate for EUVL is formed of quartz glass containing TiO.sub.2. The end surfaces include fluorine (F) and an element (A) other than fluorine that forms a gas cluster with fluorine, and satisfy relations:

S1=∫.sub.0.sup.x=50[nm]{D1(x)−(a1x+b1)}dx>0.2  (1)

S2=∫.sub.0.sup.x=50[nm]{D2(x)−(a2x+b2)}dx>0.03  (2)

A substrate for a display article includes: a primary surface; a textured region on at least a portion of the primary surface, the textured region comprising surface features that reflect a random distribution, each of the surface features comprising a perimeter that is parallel to a base-plane extending through a thickness of the substrate below the textured region, wherein the perimeter is elliptical. The textured region can further include (i) one or more higher surfaces residing at a higher mean elevation from the base-plane and (ii) one or more lower surfaces residing at a lower mean elevation from the base-plane that is closer to the base-plane than the higher mean elevation. The higher mean elevation can differ from the lower mean elevation by a distance within a range of 0.05 μm to 0.70 μm.

Deadfront articles that include a tactile element formed on a first surface of a substrate and a visual element disposed on a second surface of the substrate opposite the first surface. The tactile element is positioned on the first surface of the substrate in a complimentary fashion to the visual element disposed on the second surface of the substrate. The tactile element may include a surface roughness portion having a surface roughness different than the surface roughness of an area bordering the surface roughness portion. The deadfront articles may be incorporated into an automobile interior to provide a visual and haptic display interface for a user.

Deadfront articles that include a tactile element formed on a first surface of a substrate and a visual element disposed on a second surface of the substrate opposite the first surface. The tactile element is positioned on the first surface of the substrate in a complimentary fashion to the visual element disposed on the second surface of the substrate. The tactile element may include a surface roughness portion having a surface roughness different than the surface roughness of an area bordering the surface roughness portion. The deadfront articles may be incorporated into an automobile interior to provide a visual and haptic display interface for a user.

An article that includes: a glass-based substrate comprising a thickness, a primary surface and a compressive stress region that extends from the primary surface to a selected depth; and a textured region defined by the primary surface. The textured region comprises a surface roughness (R.sub.a) of at least 10 nm. The article can also comprise a Knoop Scratch Threshold of at least 9 Newtons (N).

A trim element for a motor vehicle that includes 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. 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.

A cover glass sheet configured to cover at least a display device, having an outer sheet face and an inner sheet face where the inner sheet face faces the display device and wherein the outer sheet face includes (a) at least a display zone (1) allowing visualization of at least part of a screen of the display device, the display zone having a perimeter, P.sub.display; and (b) at least an opaque zone (2) corresponding to a layer of opaque paint being added at the exception of the display zone, to all or part of the remaining inner sheet face and directly surrounding at least 10-100% of the display perimeter, the opaque zone has a mean surface roughness defined by an opaque arithmetic amplitude value, Ra.sub.(op). The outer sheet face further includes at least one textured zone covering between 0.5% to 99.5% of the opaque zone.

An electronic component includes a glass substrate, an outer surface conductor that is in contact with an outer surface of the glass substrate, and a protective film that covers the outer surface of the glass substrate and the outer surface conductor and is in contact with the outer surface of the glass substrate and the outer surface conductor. When the glass substrate has first surface roughness Ra1 at an interface between the glass substrate and the outer surface conductor, the glass substrate has second surface roughness Ra2 at an interface between the glass substrate and the protective film, and the outer surface conductor has third surface roughness Ra3 at an interface between the outer surface conductor and the protective film, Ra1<Ra3<Ra2 is satisfied.

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.