A method is provided for producing a patterned glass wafer for packaging electronic devices in a wafer assembly. The method includes placing a glass sheet between two mold halves and heating until the glass sheet softens, while the mold halves are pressed against one another so that the glass sheet is reshaped and forms a patterned glass wafer. The first mold half has an array of projections and the second mold half has an array of recesses. The mold halves are arranged and shaped so that the recesses and projections oppose each other. The projections introduce cavities into the glass sheet during the reshaping and with the glass flowing into the recesses of the second mold half during the reshaping. The recesses are deep enough for the glass to at least partially not come in contact therewith and to form a convexly shaped glass surface in each recess.

The invention relates to a method for producing glass tubes with a cross section of a noncircular form by reshaping. This method includes at least providing a glass tube, heating the glass tube, providing at least one reshaping tool, which has a forming body with a forming area for reshaping the heated glass tube, the forming body including at least one open-porous material, setting a gas pressure in the interior of the reshaping tool lower than 90 kPa, so that a negative pressure is produced on the forming area, and reshaping the heated glass tube by applying a compressive force perpendicularly to the longitudinal axis of the glass tube, the compressive force being generated by the reshaping tool and being applied to the outer surface of the glass tube, and the outer surface of the glass tube being fixed by the negative pressure.

The present disclosure relates to a method for manufacturing a hollow glass item and, specifically, to a method for manufacturing an item made of hollow pressed glass. The method includes a step of depositing at least one drop of molten glass into a mold intended for modelling a predetermined outer shape of the glass item to be manufactured; a step of pressing the molten glass into the mold by a shaping punch in order to shape the hollow glass item by hollowing out an inside space; a step of marking the glass item with a marking tool which is independent from the shaping punch, in order to imprint at least one raised and/or recessed pattern in the inside space of the glass item; a step of cooling the marked, pressed glass item; and a step of removing the glass item from the mold.

There are provided a one-press manufacturing method for a glass container that can form uneven shapes on an inner peripheral surface of a glass container and a glass container that is obtained by the one-press manufacturing method. The one-press manufacturing method for a glass container includes the following steps (A) to (E); (A) a step of putting a gob in a pressing mold and then inserting a plunger, which includes an unevenness forming member provided so as to be capable of being received in the plunger, into the gob while the unevenness forming member is received in the plunger, (B) a step of forming a glass container having a finished shape, which includes an uneven shape on an inner peripheral surface thereof, by pressing the unevenness forming member against the surface of the gob, which comes into contact with the unevenness forming member, to the outside from the inside of the plunger, (C) a step of receiving the unevenness forming member in the plunger, (D) a step of extracting the plunger, in which the unevenness forming member is received, from the glass container having a finished shape that includes the uneven shape on the inner peripheral surface thereof, and (E) a step of transporting the glass container having a finished shape, which includes the uneven shape on the inner peripheral surface thereof, to a cooling mold and cooling the glass container having a finished shape.

Various embodiments provide a mold including a pyrolytic carbon film disposed at a surface of the mold. Various embodiments relate to using a low pressure chemical vapor deposition process (LPCVD) or using a physical vapor deposition (PVD) process in order to form a pyrolytic carbon film at a surface of a mold.

According to various embodiments, a back surface plate configured to form a back surface of an electronic device may include: a first glass part including a first pattern area including a pattern having a predetermined shape on a first surface; and a second glass part, at least a portion of which is disposed on the first surface of the first glass part, the second glass part including a first shape complimentary to the first pattern area, wherein the second glass part may have a color different from the color of the first glass part.

Systems and methods for texturing substrates (e.g., glass, metal, and the like) and the textured substrates produced using such systems and methods are disclosed. An exemplary system for texturing a substrate includes a first roller and a second roller. The first roller has a first textured surface. The first textured surface has a root mean square roughness between 40 to 1000 microns and an autocorrelation function greater than 0.5 for distances less than 50 microns.

A mold for molding a glass product is provided. The mold includes a lower mold and an upper mold. The lower mold includes a lower pressing surface. The upper mold includes an upper pressing surface. The upper pressing surface includes a plurality of upper molding surfaces and an upper mold closing surface connecting the plurality of upper molding surfaces. The lower pressing surface includes a plurality of lower molding surfaces and a lower mold closing surface for connecting the plurality of lower molding surfaces. The upper mold closing surface and/or the lower mold closing surface include at least two mold closing regions sequentially arranged from center to outside. The at least two mold closing regions have surface roughnesses increasing from center to outside. The disclosure achieves the technical effect of even filling, synchronous demoulding, and reduced error between mold cavities.

Process for moulding and producing hollow glass, in particular a glass cap (A) with a hollow area (A) and a ring-shaped protuberance (A), comprising the following steps: providing a moulding apparatus (10) comprising: a preparatory mould (11), lower, composed of two parts or halves (11a, 11b) which can be separated from each other, having a moulding surface (11), and a cavity (11), formed along this moulding surface, corresponding respectively to an external shape (A.sup.Iv) and a shaped protuberance (A) of a hollow glass article (A) to be moulded and produced; a forming member (12), made up of two parts (12a, 12b) which can be separated 0 from each other, which surmounts and engages the lower preparatory mould (11); a pressing member (13) or plunger, upper; anda finishing mould (14); closing (f2) the upper pressing member (13) against the lower preparatory mould (11) with the interposition of a drop of glass (V), in the molten state, so as to form, with the surface moulding element (11) of the preparatory mould (11) and with the respective cavity (11), the external shape (AIv) and the protuberance (A, A), and, with the pressing member (13) the hollow area (A) of the hollow glass article; lifting and extracting (f3) the upper pressing member (13); opening (f4) the two parts (12a, 12b) of the forming member (12), so as to 0 disengage it from the preparatory mould (11) which holds the hollow glass article (A), thus formed; turning (f5) the hollow glass article (A) upside down, holding it and moving it in free air with the preparatory mould (11), and transferring it (f5) to the finishing mould (14); opening the two parts (11a, 11b) of the preparatory mould (11), in order to free the hollow glass article (A); andextracting and removing (f7) the hollow glass article (A), after it has cooled, from the finishing mould (14). The process advantageously allows to produce an article (A) of hollow glass without 0 resorting to the blow moulding technology, as in the conventional processes of the blow-blow and press-blow type.

A method for texturing a substrate includes 3-D printing a pattern onto a substrate to form a texture. The pattern has a root mean square roughness between 40 to 1000 microns and an autocorrelation function greater than 0.5 for distances less than 50 microns.