A marking composition for forming marks or indicia on a substrate is provided for laser marking applications. The composition includes a glass frit, a carrier, and absorber particles. The glass frit includes alkali metal oxides, glass forming oxides, and one or more transition metal oxides. The glass frit is devoid of at least one of bismuth and zinc.

An aluminosilicate glass having a composition according to the following formula (I):

(100−(1+a.sub.1+b.sub.1).Math.x)SiO.sub.2.Math.(x)Al.sub.2O.sub.3.Math.(a.sub.1.Math.x)MO.Math.(b.sub.1.Math.x)R (wt %)  (I)

in which MO is alkaline earth metal oxide, the alkaline earth metal M being one or more of Mg, Ca, Sr, and Ba, R comprises alkali metal oxide, the alkali metal being one or more of Li, Na, and K, x is at least 15, a.sub.1 is at least 0.35, b.sub.1 is at least 0.55, and wherein the product of a.sub.1 and b.sub.1 is at least 0.22.

Disclosed herein are sealed devices comprising a first substrate, a second substrate, an inorganic film between the first and second substrates, and at least one weld region comprising a bond between the first and second substrates. The weld region can comprise a chemical composition different from that of the inorganic film and the first or second substrates. The sealed devices may further comprise a stress region encompassing at least the weld region, in which a portion of the device is under a greater stress than the remaining portion of the device. Also disclosed herein are display and electronic components comprising such sealed devices.

A method includes depositing a glass frit on sidewalls of a plurality of cavities of a shaped article formed from a glass material, a glass ceramic material, or a combination thereof. The glass frit is heated to a firing temperature above a glass transition temperature of the glass frit to sinter the glass frit into a glaze disposed on the sidewalls of the plurality of cavities.

A light source device includes: a laser diode configured to emit laser light; a substrate directly or indirectly supporting the laser diode; and a cap secured to the substrate and covering the laser diode, the cap including: a first portion configured to transmit the laser light that is emitted from the laser diode, and a second portion that is bonded to the first portion. The second portion includes: a pair of lateral wall portions that are located at lateral sides of the laser diode, the pair of lateral wall portions being bonded to the first portion, a cover portion that is located above the laser diode and connects the pair of lateral wall portions together, and a rear wall portion that faces the first portion with the laser diode disposed between the first portion and the rear wall portion of the second portion.

A method includes depositing a glass frit on sidewalls of a plurality of cavities of a shaped article formed from a glass material, a glass ceramic material, or a combination thereof. The glass frit is heated to a firing temperature above a glass transition temperature of the glass frit to sinter the glass frit into a glaze disposed on the sidewalls of the plurality of cavities.

A method of marking a glass-ceramic article includes the steps of: illuminating a glass-ceramic article with a beam from a laser, the glass-ceramic article having a thickness, T; and forming a mark in the glass-ceramic article while translating at least one of the glass-ceramic article or laser. The mark has a Contrast Ratio greater than 10. The step of forming a mark includes focusing the beam from the laser within the thickness, T, of the glass-ceramic article. The focusing of the beam results in alteration of a chemical property or a physical property of the glass-ceramic article. The mark produced by the beam from the laser extends through at least 50% of the thickness, T, of the glass-ceramic article. The glass-ceramic article may have a global temperature less than 100° C. during the marking process and does not fracture as the mark is formed.

The present invention relates to a transparent sealing member. A quartz glass transparent sealing member is used in an optical component having at least one optical element, and a mounting board on which the optical element is mounted, and constitutes, with the mounting board, a package that houses the optical element. The concentration of aluminum in a surface portion is higher than the concentration of aluminum in an inner portion.

A light source device includes: a laser diode; a substrate directly or indirectly supporting the laser diode; and a cap secured to the substrate and covering the laser diode. The cap includes a first glass portion configured to transmit laser light that is emitted from the laser diode, and a second glass portion. At least one of the first glass portion and the second glass portion includes an alkaline glass region.

The first glass portion and the second glass portion are bonded together via an electrically conductive layer that is in contact with the alkaline glass region.

A synthetic quartz glass substrate having a controlled hydrogen molecule concentration is prepared by (a) hot shaping a synthetic quartz glass ingot into a glass block, (b) slicing the glass block into a glass plate, (c) annealing the glass plate at 500-1,250 C. for 15-60 hours, (d) hydrogen doping treatment of the glass plate in a hydrogen gas atmosphere at 300-450 C. for 20-40 hours, and (e) dehydrogenation treatment of the glass plate at 200-400 C. for 5-10 hours.