Strengthened glass articles formed from a glass composition comprising less than 1.0 mol % R.sub.2O, where R is an alkali ion, are disclosed. In various embodiments, the glass articles have a dielectric constant of less than 6.25 and a dielectric loss tangent of less than 0.01 at 30 GHz. Electronic devices, such as consumer electronic products, including the strengthened glass articles, as well as methods of making the strengthened glass articles are also disclosed.

A glass container includes a glass body comprising an external surface, an internal surface opposite the external surface, a thickness T extending between the external surface and the internal surface, and an external surface layer extending from the external surface into the thickness of the glass body, wherein the external surface layer has a porosity greater than a porosity of a remainder of the glass body extending from the external surface layer to the internal surface.

A glass substrate 10 has a mark provided on a surface 10A of the glass substrate 10, the mark including plural dots 104, a depth H of each of the dots 104 is 0.5 μm or larger and 7.0 μm or smaller, and an inclination angle of a side surface 104B of each of the dots 104 is 5° or larger and 56° or smaller.

A window for a window cover of an electronic device, includes: a glass material; a lower surface; an upper surface opposite to the lower surface; a folding portion to be folded relative to a folding axis extending in a first direction; and a non-folding portion including a first non-folding portion, and a second non-folding portion spaced from the first non-folding portion with the folding portion interposed therebetween. The non-folding portion has a surface compressive stress less than a surface compressive stress of the folding portion.

A glass substrate with modified surface regions is disclosed. The glass substrate includes a first side and an opposite second side, an alkali-containing bulk disposed between the first and second sides, and a first alkali-depleted region formed in the alkali-containing bulk on the first side. The first alkali-depleted region defines at least a portion of a first topographical feature. The first topographic feature includes a height that extends in a first direction from a base portion of the first topographical feature to an outermost portion of the first topographical feature. The first direction is oriented parallel to a thickness of the glass substrate between the first and second sides. The first topographic feature also includes a width that extends in a second direction between at least two, spaced apart wall portions of the first topographical feature. The second direction is oriented normal to the first direction.

An article comprises a glass substrate. The glass substrate has a first surface having a plurality of vias therein, and a second surface parallel to the first surface. At least one of the first surface and the second surface is an etched surface having a surface roughness (Ra) of 0.75 nm or less. The glass substrate comprises, in mol percent on an oxide basis: 65 mol %≤SiO.sub.2≤75 mol %; 7 mol %≤Al.sub.2O.sub.3≤15 mol %; 26.25 mol %≤RO+Al.sub.2O.sub.3−B.sub.2O.sub.3; 0 mol %≤R.sub.2O≤2 mol %. RO=MgO+CaO+SrO+BaO+ZnO. R.sub.2O=Li.sub.2O+Na.sub.2O+K.sub.2O+Rb.sub.2O+Cs.sub.2O.

To provide a method for manufacturing a medical glass container prevented from breakage and deformation and a fire blasting device. A method for manufacturing a medical glass container includes a processing process of placing a glass container 10 on the outer peripheral surface of each of a first roller 61 and a second roller 62, which are disposed side by side in such a manner that the axis lines are parallel to each other, so that the axis line of the glass container 10 is parallel to the axis lines of the first roller 61 and the second roller 62 and the entire outer peripheral surface in an inner surface 15 of the glass container 10 corresponding to a region deteriorated by processing is made to abut on the outer peripheral surface of each of the first roller 61 and the second roller 62, and then applying a flame ejected from a point burner 30 to the region deteriorated by processing in the inner surface 15 of the glass container 10 while rotating the glass container 10 by rotating the first roller 61 and the second roller 62 around the axis lines.

Embodiments of a glass-based article including a first surface and a second surface opposing the first surface defining a thickness (t) of about 3 millimeters or less (e.g., about 1 millimeter or less), and a stress profile, wherein all points of the stress profile between a thickness range from about 0.Math.t up to 0.3.Math.t and from greater than 0.7.Math.t, comprise a tangent that is less than about −0.1 MPa/micrometers or greater than about 0.1 MPa/micrometers, are disclosed. In some embodiments, the glass-based article includes a non-zero metal oxide concentration that varies along at least a portion of the thickness (e.g., 0.Math.t to about 0.3.Math.t). In some embodiments, the concentration of metal oxide or alkali metal oxide decreases from the first surface to a point between the first surface and the second surface and increases from the point to the second surface. The concentration of the metal oxide may be about 0.05 mol % or greater or about 0.5 mol % or greater throughout the thickness. Methods for forming such glass-based articles are also disclosed.

Methods for increasing the hydrolytic resistance of a glass article are disclosed. According to one embodiment, the method includes providing a glass article with a pre-treatment hydrolytic titration value. Thereafter, the glass article is thermally treated at a treatment temperature greater than a temperature 200C less than a strain temperature of the glass article for a treatment time greater than or equal to about 0.25 hours such that, after thermally treating the glass article, the glass article has a post-treatment hydrolytic titration value that is less than the pre-treatment hydrolytic titration value.

Disclosed are device display screen protectors comprising a first strengthened substrate sized to cover a display screen of an electronic device, the first strengthened substrate having a central tension value in the range greater than 0 MPa and less than 20 MPa, a surface having a Knoop lateral cracking scratch threshold of at least 3 N.