KR20170027066A - Method of producing protect glass - Google Patents

Abstract

The present invention relates to a method for producing protective glass. According to the present invention, the method for producing protective glass comprises the following steps: disposing a plurality of unit cells, prepared by cutting a glass substrate into pieces, on a penetrative jig; and forming an image part on each of the plurality of unit cells.

Description

[0001] METHOD OF PRODUCING PROTECT GLASS [0002]

The present invention relates to a method for manufacturing a protective glass. More particularly, the present invention relates to a method of manufacturing a protective glass that can be attached to a display screen of a portable terminal to protect a display screen and include an image to cause a sense of beauty.

2. Description of the Related Art In recent years, there has been a growing demand for slimmer portable terminals such as mobile phones, smart phones, tablet PCs, personal digital assistants (PDAs), portable multimedia players (PMPs) have.

For slimming, a main window disposed at the outermost portion of the display screen may be a tempered glass having a thin thickness and high strength. However, even if the tempered glass is used, the cover glass may be broken or scratch may occur due to external impact during use of the portable terminal. Thus, although a protective film attached to a display screen is used to protect the cover glass, since the protective film is generally made of a polymer material, there is an effect of preventing scratches, but a cover glass is cracked or cracked There was a problem that the impact of the present invention can not withstand.

On the other hand, design demands for portable terminals are increasing. In order to apply a printing such as black or white to cover the wiring of a display panel or the like in a bezel area of a cover glass, or to add a more luxurious design, Or a film of a geometric pattern is laminated. However, this increases the manufacturing cost of the portable terminal and makes it difficult to easily change the design once employed.

Accordingly, it is an object of the present invention to provide a protective glass for protecting a display screen by attaching to a display screen of a portable terminal.

It is another object of the present invention to provide a protective glass which can enhance an aesthetics of a display screen of a portable terminal.

The above object of the present invention can be achieved by a method of manufacturing a semiconductor device, comprising: disposing a plurality of unit cells cut from a glass substrate on a through type jig; And forming an image portion on each of the plurality of unit cells.

According to the present invention configured as described above, the display screen can be protected by being attached to the display screen of the portable terminal. This process is a mass-production process that reduces loss caused by post-processing of patterned glass. It uses a precision jig and a docking jig to support the pattern cover glass for mobile, smart watch, back cover glass for battery, It is possible to apply both camera windows. In particular, multiple cells can be aligned at one time to carry out the entire process from exposure to exfoliation, and penetration of the chemical liquid, which can affect the yield, can be prevented by 100%.

1 is a plan view illustrating a step of mounting a glass-made cell to a through-type support holder in a method of manufacturing a protective glass according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a step of forming a pattern by mounting a glass-made cell to a through-type support holder in a method of manufacturing a protective glass according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a configuration in which a docked jig is introduced to physically hold a through-type support holder in a method of manufacturing a protective glass according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a method of manufacturing a protective glass according to an exemplary embodiment of the present invention. For example, a through-type jig suitable for a completed reinforced cell is manufactured, a plurality of cells are inserted, This shows the pattern glass manufacturing process for mobile.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views, and length and area, thickness, and the like may be exaggerated for convenience.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

As consumer interest in design elements of smart devices to which touch panels are applied has increased, diversified materials such as metal materials are adopted and black and white color printing is applied to cover the display panel wiring in the cover glass bezel area. In addition, in order to achieve a more luxurious image compared to other products, hair line, geometry pattern film (aka, Deco Film) and UV molding method are applied. However, it has various problems such as process yield, low transmittance, and monotonous design.

Direct pattern cover glass, which has recently been attracting interest from smart device makers, is a technology that complements these problems. A method of embedding a pattern by an etching process after implementing a pattern using a photo-resist having an acid resistance on a tempered glass surface cut in a cell size (cell size), and a multi-coating and a BM And a printing process.

Depending on the size of the glass being loaded, the order of the process changes. If you are working with the glass of the original glass, the pattern is made and then cut into each cell. This is advantageous in terms of productivity but has a disadvantage in that the yield is lowered in the cutting and strengthening process.

Direct Pattern Cover Glass, which is processed in a cell size unit, proceeds only through cutting and strengthening process, so it is advantageous in terms of yield but productivity is low. Particularly, penetration occurs in the etching process on side and back without photo-resist layer, Because it contains various defects such as size reduction, smudge and dumping, new process technology is needed to solve this problem.

According to another aspect of the present invention, there is provided a method of manufacturing a protective glass, including: disposing a plurality of unit cells cut from a glass substrate including a plurality of unit cell regions on a through jig; And forming an image portion on each of the plurality of unit cells.

Specifically, first, a glass substrate including a plurality of unit cell regions is prepared. The unit cell region means an area that can act substantially as a protection glass after the glass substrate is cut. The number of unit cells can be increased or decreased according to the size of the glass substrate or the size of the unit cell region.

The glass substrate can be composed of tempered glass having an excellent hardness. By adopting such a configuration, the protective glass can protect the cover glass of the portable terminal, and the surface of the protective glass is not easily scratched. Particularly, among the tempered glass, it is preferable to use a low iron glass, a soda lime glass, an alumina silicate glass or the like containing a small amount of iron powder. Alternatively, a glass strengthening process may be added as a subsequent process after the protective glass is prepared using unreinforced glass.

If the protective glass is too thick, the thickness of the portable terminal becomes thick. If the protective glass is too thin, the strength of the protective glass may be weakened. Therefore, the thickness of the glass substrate is For example 0.03 to 3.0 mm, and may be strictly 0.1 to 1.1 mm.

Next, the glass substrate can be cut along the unit cell region.

Hereinafter, a part of the unit cell region of the glass substrate may be etched to form an image etching portion, and then the glass substrate may be cut along the unit cell region. Alternatively, without forming the image etching portion, The process of forming an image portion may be performed.

Next, a masking film can be applied on the glass substrate for masking. The masking film may be a photosensitive ink, an acid-resistant photoresist, an acid-resistant film, or an acid-resistant tape. In the following, it is assumed that an acid-resistant photoresist is used. If the masking film has acid resistance, it can not be easily etched by strong acid or hydrofluoric acid in a wet etching process, which will be described later, so that a masking pattern can be formed more precisely. As the coating method, spin coating, dip coating, silk screen, slit coating, and the like can be used.

Next, a masking pattern can be formed on a part of the masking film so that the portion to be etched of the glass substrate is exposed. The process of forming the masking pattern may be a photolithography process, which is a known patterning technique. When the masking pattern is formed using such a photolithography process, the masking pattern can be formed more precisely, so that an image portion having a high resolution can be easily formed.

Next, a masking pattern is formed, and an upper portion of the exposed glass substrate is etched to form an image etching portion. Since the image portion is formed on the protective glass, it is preferable that the image etching portion is formed on at least a part of the unit cell region of the glass substrate. It is understood that the image etching unit may etch the bezel region of each unit cell region, but it is needless to say that the display region may be etched.

The image etching unit can be formed by chemically wet-etching the upper surface of the glass substrate using the masking pattern as a mask. Conventionally, glass has been etched through physical etching such as sandblasting, but it has been difficult to apply to tempered glass. Therefore, tempered glass having high hardness can be etched by wet etching. Chemical etching can be understood as meaning etching the upper surface of the glass substrate by chemically reacting the glass substrate with a predetermined etching solution. As the etchant, an etchant containing at least one of hydrofluoric acid, sulfuric acid, nitric acid, phosphoric acid and non-fluoric acid can be used.

As an example, a process of spraying the etchant through one or more nozzles may be used to chemically wet etch the top of the glass substrate. As another example, a process of dipping a glass substrate in the etchant may be used, and in some cases, both of the above-described processes may be performed to etch the upper surface of the glass substrate. In the case of performing both of the processes, a spray process may be performed prior to the dipping process. In addition, other etching methods such as dry etching can be used without limitation within a range in which the image etching part can be precisely formed.

Next, the masking pattern can be peeled off. The peeling may be a peeling solution of a hydroxyl series such as potassium hydroxide (KOH). Next, a cut masking pattern is formed on both sides of the glass substrate to mask the unit cell region. Next, except for the masked unit cell regions on both sides of the glass substrate, the remaining exposed regions can be etched. The glass substrate can be cut into a plurality of unit cell sizes by etching both surfaces of the glass substrate.

The double-sided etching process of the glass substrate can be performed by spraying the etching solution on both sides of the glass substrate by spraying, and the same method and the same material can be used for forming the above-described image etching portion. In addition, the glass substrate may be cut using a method of dipping, sanding, and scribing.

Next, the above-described cut masking pattern formed on both sides of a plurality of unit cells can be peeled off. The peeling of the cut masking pattern can be carried out by applying the same method of peeling the above-described masking pattern. As a result, a unit cell having an image etching section remains.

FIG. 1 is a plan view illustrating a step of mounting a plurality of glass-made cells implemented by the above-described method on a through-type support holder in a method of manufacturing a protective glass according to an embodiment of the present invention, Fig. In the corner of the jig, a circular aline key is formed on the outer side so as to mask and align. The shape used for the alignment key may be through, or it may be only a shape. In addition, it is possible to create all user-friendly shapes that are commonly used, such as circle, square, cross and the like.

The through jig can be made of SUS, acrylic, FR4, etc., and the glass can be used as a jig by precision etching. In addition, metal or Teflon may be coated on the jig to increase the chemical resistance, thereby increasing the service life.

2 is a cross-sectional view illustrating a step of forming a pattern after mounting a glass-made cell to a through-type support holder in a method of manufacturing a protective glass according to an embodiment of the present invention. That is, FIG. 2 shows a state after a glass is placed on a jig, a protective film is coated on the back surface, a photosensitive film is coated on the front surface, and a pattern is formed.

A photosensitive film (DFR), a tape, or the like can be applied as a protective film or a material for physically supporting the backside. Typical examples of the photosensitive film coated on the pattern portion include ink, DFR, and the like.

3 is a cross-sectional view illustrating a configuration in which a docked jig is introduced to physically hold a through-type support holder in a method of manufacturing a protective glass according to an embodiment of the present invention. That is, FIG. 3 shows a case where a jig for physical support is docked to prevent a seated cell from being deviated from the process due to physical deflection when the thin glass is applied (0.1 mm to 0.7 mm). In this case, a precisely cut plate may be mounted. The jig for docking can be applied to a thickness of 2mm ~ 10mm. It can be machined as shown in the drawing so that the through jig can be inserted exactly, or a flat jig having only the outer edge can be mounted precisely.

Regarding the alignment, it can be regarded as being in the through jig as shown in Fig.

FIG. 4 is a flowchart illustrating a method of manufacturing a protective glass according to an exemplary embodiment of the present invention. For example, a through-type jig suitable for a completed reinforced cell is manufactured, a plurality of cells are inserted, This shows the pattern glass manufacturing process for mobile. FIG. 4 shows a series of processes using a through jig. A jig is manufactured with a tolerance of about 100 to 300 micrometers in the size of a cell to be manufactured. At this time, the Align key may be necessary. Place the cell in the through jig and proceed to the back and front coating. The rear and front coatings are done in a way that covers the entire jig, using a screen printer or a laminator. At this time, heat can be applied to increase adhesion. After aligning the mask and irradiating UV, development is performed to form a pattern, and then the glass is etched. After peeling off after etching, the cell is detached and cleaned. Then, as shown in 12 of FIG. 4, when a multi-coating is performed on the etched surface or the opposite surface and printing is performed, a cover glass for mobile in which a pattern is formed can be manufactured.

This process is a mass-production process that reduces loss caused by post-processing patterned glass. It uses a precision jig and a docking jig to support the pattern cover glass for mobile, smart watch, back cover glass for battery, Camera window, and so on. In particular, multiple cells can be aligned at a time to perform all processes from exposure to exfoliation, and penetration of the liquid can be prevented by 100%, which can affect the yield.

Simultaneously pattern cells to be applied to multiple mobile phones using a through jig. Here, the number of several cells may be, for example, from a minimum of four to a maximum of several thousand. The cell may be a patterned glass for a camera window. The through-type jig may have a structure of a through-type jig including an alignment key. In addition to the photosensitive ink, an acid-resistant ink, an acid-resistant film, and an acid-resistant tape may be used for the patterning. As a reagent used as an etching solution, hydrofluoric acid, non-hydrofluoric acid (F-sault series), and / or mixed acid can be used. Acid-resistant tape, DFR, etc. can be applied to the backside protection material. The thickness of the glass may be within 0.1-1.1 mm. As the material of the jig, SUS, FR4, acrylic, glass coated with a thin film, or the like can be used. The docking jig can be mounted for physical support. The cell may be chemically tempered or non-tempered glass.

The products to be manufactured are mobile cover glass, back cover, smart watch, camera lens protection glass, and camera window lens.

The present invention relates to a manufacturing method used for forming a pattern in an etched manner on a cover glass for a mobile device, a back cover glass, a smart watch, a camera window, etc., and a through- . Also, with the alignment key on the outside of the jig, it can align with the mask and irradiate the UV at the precise position, which prevents the pattern from deviating or distorting.

Even if the coating film does not prevent the penetration of the etchant into the pattern making part, the coating film adhered to the back face prevents penetration of the etchant, thereby minimizing defects and improving the yield.

The coating film on the rear surface is made of different materials and is not peeled off even when the pattern surface is peeled, thereby preventing detachment of each cell. If the through-hole type jig of the present invention is thin and can not support the physical support, it can be physically supported by mounting a plate-shaped jig as shown in FIG.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken in conjunction with the present invention. Variations and changes are possible. Such variations and modifications are to be considered as falling within the scope of the invention and the appended claims.

Claims (1)

Disposing a plurality of unit cells cut from the glass substrate on a through jig; And
Forming an image portion in each of the plurality of unit cells;
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