An object of the invention is to provide a multilayer glass which can be manufactured by a simple process. To solve the above problem, the multilayer glass according to the invention includes a first glass substrate, a second glass substrate that faces the first glass substrate at an interval of a predetermined space, and a sealing part that seals a periphery of an internal space defined by the first glass substrate and the second glass substrate. The sealing part is formed with a sealing material containing low melting point glass. The internal space is in a vacuum state. The first glass substrate includes an exhaust port that is provided to be included in a projection part of the sealing part when being projected in a lamination direction of the first glass substrate and the second glass substrate. The exhaust port is blocked by the sealing material (see FIG. 3).

A compressible pillar for the preparation of a vacuum insulated glazing (VIG) unit, having a longitudinal extent in the pre-compressed state and including a deformable part having an open structure, which open structure will at least partially collapse when the pillar is subject to a compression force acting in the longitudinal direction of the pillar, the compression force being of at least one value selected within the range of 60 N to 320 N, the pillar will exhibit a partly irreversible deformation causing a reduction in the longitudinal extent of the pillar when the pillar is subjected to the compression force, so that when the compression force is fully released the pillar will exhibit an expansion in the longitudinal direction of the pillar which is less that the reduction in the longitudinal extent of the pillar. Further is shown a process for manufacturing of a compressible pillar, a method of producing a VIG unit as well as a VIG unit.

A compressible pillar for the preparation of a vacuum insulated glazing (VIG) unit, having a longitudinal extent in the pre-compressed state and including a deformable part having an open structure, which open structure will at least partially collapse when the pillar is subject to a compression force acting in the longitudinal direction of the pillar, the compression force being of at least one value selected within the range of 60 N to 320 N, the pillar will exhibit a partly irreversible deformation causing a reduction in the longitudinal extent of the pillar when the pillar is subjected to the compression force, so that when the compression force is fully released the pillar will exhibit an expansion in the longitudinal direction of the pillar which is less that the reduction in the longitudinal extent of the pillar. Further is shown a process for manufacturing of a compressible pillar, a method of producing a VIG unit as well as a VIG unit.

A glass panel unit assembly includes a pair of glass substrates arranged to face each other, a peripheral wall, a partition, an air passage, and an evacuation port. The peripheral wall has a frame shape and is provided between the pair of glass substrates. The partition partitions an internal space, surrounded with the pair of glass substrates and the peripheral wall, into a first space and a second space. The air passage connects the first space and the second space together. The evacuation port connects the second space to an external environment. The partition has a broader width than the peripheral wall.

A glass panel unit assembly includes: glass substrates; a peripheral wall having a frame shape and disposed between the glass substrates; a partition; an evacuation port; and a plurality of air passages. The partition partitions an internal space into an evacuation space, a ventilation space, and a coupling space. The evacuation port connects the ventilation space to an external environment. The plurality of air passages includes: a first air passage connecting the evacuation space to the coupling space; and a second air passage connecting the coupling space to the ventilation space. The second air passage includes a particular air passage having a larger dimension than any of the first air passage.

An object of the invention is to provide a glass panel unit manufacturing method and a glass window manufacturing method which enable a binder to be effectively removed from a glass adhesive, provide high adhesive strength between panels, and enable a vacuum space to be stably formed. A method for manufacturing a glass panel unit includes: disposing a glass adhesive to have one part as a low step part thinner than the other part of the glass adhesive; disposing a first substrate including at least a first glass substrate and a second substrate including at least a second glass substrate to face each other; and heating glass composite to form an inner space; reducing the pressure of the inner space; and forming a vacuum space from the inner space. The glass adhesive includes glass powder and a binder.

An induction-heating welding method for vacuum insulated glass comprising upper and lower glass substrates is disclosed. Metal layers are prepared in regions to be sealed for the upper and lower glass substrates. A continuous solder is distributed on the metal layer in the lower glass substrate's region to be sealed. The upper and lower glass substrates are superposed. During welding, a high-frequency induction welding head's center moves forward along a centerline of a width of the metal layers; during induction heating of the metal layers in a corner region, a relative position between a movement route of the high-frequency induction welding head's center and the centerline of the width of the metal layers is changed, so that the movement route deviates from the centerline of the width of the metal layers, and thus reducing induction power and avoiding overheating of the metal layers in the corner region.

Certain example embodiments relate to seals for glass articles. Certain example embodiments relate to a composition used for sealing an insulted glass unit. In certain example embodiments the composition includes vanadium oxide, barium oxide, zinc oxide, and at least one additional additive. For instance, another additive that is a different metal oxide or different metal chloride may be provided. In certain example embodiments, a composition may be combined with a binder solution that substantially or completely burns out by the time the composition is melted. In certain example embodiments, a vacuum insulated glass unit includes first and second glass substrates that are sealed together with a seal that included the above-described composition.

A glass panel unit manufacturing method includes a bonding step, a pressure reducing step, and a sealing step. The bonding step includes bonding together a first substrate and a second substrate with a first sealant to create an inner space. The pressure reducing step includes producing a reduced pressure in the inner space through an exhaust port that the first substrate has. The sealing step includes melting a second sealant inserted into the exhaust port by locally heating the second sealant, and deforming the second sealant by pressing the second sealant toward the second substrate, to seal the exhaust port up with the second sealant melted and deformed.

A vacuum insulated glass product and the method for making the same, wherein the vacuum insulated glass comprises: a first glass substrate; a second glass substrate disposed facing the first glass substrate; a sealing structure provided between the first glass substrate and the second glass substrate and used for airtight binding of the first glass substrate and the second glass substrate to form a vacuum cavity; and a plurality of supports provided inside the vacuum cavity for bearing pressure from the first glass substrate and the second glass substrate. The sealing structure comprises: metal layers which are fixedly formed on facing surfaces of the first glass substrate and the second glass substrate, and an intermediate solder layer which is disposed between and connects the metal layers. The sealing structure has arc-shaped transition structures at the corner areas of the glass substrates.