CN114133146A

CN114133146A - Rear cover machining method, rear cover and terminal equipment

Info

Publication number: CN114133146A
Application number: CN202111559166.3A
Authority: CN
Inventors: 杨啸
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-03-04
Anticipated expiration: 2041-12-20
Also published as: CN114133146B

Abstract

The application relates to a rear cover processing method, a rear cover and terminal equipment, wherein the rear cover processing method comprises the following steps: providing a colored glass substrate; carrying out ion exchange treatment on the color glass substrate to increase the concentration of ions used for generating fluorosilicate on the surface layer of the color glass substrate to obtain a glass substrate; and etching the glass substrate by using the anti-dazzle etching solution containing the fluorine silicate ions to form the snowflake texture. After the colored glass substrate is subjected to ion exchange treatment, the concentration of ions for generating fluorosilicate on the surface layer of the colored glass substrate is increased, and compared with ions for developing color in the colored glass substrate, the ions for generating fluorosilicate are more easily combined with fluorosilicate ions in an anti-glare etching solution to generate fluorosilicate crystals so as to form snowflake textures.

Description

Rear cover machining method, rear cover and terminal equipment

Technical Field

The application relates to the technical field of terminal equipment, in particular to a rear cover machining method, a rear cover and terminal equipment.

Background

In the related art, in order to improve the decorative effect of the glass rear cover of the terminal equipment such as the mobile phone, the rear cover is generally formed by a process of plating a color film on transparent glass. The coating process is easy to form a thick film layer on the outer edge and the opening edge of the glass rear cover to cause over-deep color and luster, and the texture of the formed glass rear cover is poor, so that the decorative effect of the rear cover is reduced.

Disclosure of Invention

The embodiment of the application provides a rear cover machining method, a rear cover and terminal equipment, so that the decorative effect of the rear cover is improved.

A processing method of a rear cover comprises the following steps:

providing a colored glass substrate;

carrying out ion exchange treatment on the colored glass substrate, and increasing the concentration of ions used for generating fluorosilicate on the surface layer of the colored glass substrate to obtain a glass substrate; and

and etching the glass substrate by using an anti-dazzle etching solution containing fluorine silicate ions to form a snowflake texture.

After the colored glass substrate is subjected to ion exchange treatment, the concentration of ions for generating fluorosilicate on the surface layer of the colored glass substrate is increased, and compared with ions for developing color in the colored glass substrate, the ions for generating fluorosilicate are more easily combined with fluorosilicate ions in an anti-glare etching solution to generate fluorosilicate crystals so as to form snowflake textures.

In one embodiment, the step of subjecting the colored glass substrate to ion exchange treatment comprises:

and carrying out salt bath treatment on the colored glass base material, wherein the heating medium for the salt bath treatment comprises potassium nitrate, the salt bath time is 8-15 min, and the salt bath temperature is 350-450 ℃.

In one embodiment, the colored glass substrate includes a first surface and a second surface opposite to each other, and after the step of performing the ion exchange treatment on the colored glass substrate and before the step of performing the etching treatment on the glass substrate, the method further includes:

and spraying a protective film layer on the second surface, wherein the spraying air pressure is 200kPa-400kPa, the spraying speed is 300mm/s-500mm/s, and the distance between a spray gun and the second surface is 30cm-50 cm.

In one embodiment, the step of performing the etching process on the glass substrate includes:

the glass substrate is inclined 15-20 degrees relative to the liquid level of the anti-dazzle etching solution and is immersed into the anti-dazzle etching solution for etching along the direction vertical to the liquid level, the speed of immersing the glass substrate into the anti-dazzle etching solution is 590-610 mm/s, the temperature of the anti-dazzle etching solution is 15-18 ℃, and the immersion time is 2.5-3.5 min.

In one embodiment, after the step of performing the ion exchange treatment on the colored glass base material and before the step of performing the etching treatment on the glass substrate, the method further includes:

carrying out first overflow water washing on the glass substrate, wherein the water temperature is normal temperature, and the soaking time is 3-7 min;

carrying out bubbling pickling by adopting 5% hydrofluoric acid solution, wherein the soaking time is 20-30 s, and the replacement frequency of the hydrofluoric acid solution is 12 h/time;

carrying out secondary overflow washing with water at normal temperature; and

soaking the glass substrate in water at the temperature of 13-17 ℃ for 4-6 min, and taking the glass substrate out of the water in a lying state;

after the step of performing the etching process on the glass substrate, the method further includes:

washing the etched glass substrate with water at the temperature of 30-45 ℃;

pickling with 10% sulfuric acid solution, and shaking the glass substrate in the pickling process; and

and carrying out overflow water washing for the third time, wherein the water temperature is normal temperature.

In one embodiment, after the step of the third overflow water washing, the method further comprises:

and chemically polishing the glass substrate by using a mixed solution of hydrofluoric acid, sulfuric acid and hydrochloric acid.

In one embodiment, after the step of chemically polishing the glass substrate, the method further comprises:

carrying out first strengthening treatment on the glass substrate by using 38% of sodium nitrate and 62% of potassium nitrate in percentage by weight respectively, wherein the temperature of the first strengthening treatment is 395-405 ℃, and the time is 140-150 min; and

and carrying out secondary strengthening treatment on the glass substrate after the primary strengthening treatment by utilizing 9% of sodium nitrate and 91% of potassium nitrate in percentage by weight respectively, wherein the temperature of the secondary strengthening treatment is 395-405 ℃, and the time is 25-35 min.

In one embodiment, the colored glass substrate includes a first surface and a second surface opposite to each other, and after the step of performing the second strengthening treatment on the glass substrate, the method further includes:

adhering a decorative film to the second surface of the glass substrate by using a vacuum laminating machine under the condition that the vacuum degree is not more than-96 kPa, wherein the hardness of the decorative film is 30A-50A;

maintaining the pressure of the decorative film at 8-15 kg and 50-80 ℃ for 20-40 min; and

at vacuum degree greater than 5 x 10^-2And evaporating a perfluoropolyether film layer on the first surface of the glass substrate by using an evaporator under the condition of Pa.

In one embodiment, the step of providing a colored glass substrate comprises:

cutting the color glass raw material;

carrying out CNC engraving processing on the cut colored glass raw material, wherein the CNC engraving processing comprises rough engraving processing and fine engraving processing; the grinding wheel rod adopted by the rough engraving processing is 400# -800#, and the grinding wheel rod adopted by the fine engraving processing is 1000# -1200 #;

polishing the edge of the color glass raw material subjected to CNC engraving by a rotating pig hair brush for 18-22 min;

performing hot bending processing on the color glass raw material with the polished edge by using a resistance heating hot bending machine, wherein the temperature of the hot bending processing is 680-750 ℃, the preheating time is 500-700 s, the pressure maintaining time is 350-520 s, and the cooling time is 500-900 s; and

and under the action of polishing solution and cerium oxide powder, polishing the hot-bent colored glass raw material by using a mixed brush, wherein the polishing pressure is 250kg-450kg, the polishing time is 2400s-4800s, and the polishing removal amount is 0.1mm-0.2mm, so as to obtain the colored glass substrate.

The rear cover is manufactured by adopting the processing method of the rear cover.

A terminal device comprises a display screen, a middle frame and the rear cover, wherein the display screen is connected to one side of the middle frame, and the rear cover is connected to the opposite side of the middle frame.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a viewing angle of a terminal device according to an embodiment;

FIG. 2 is a schematic view of another perspective of the terminal device shown in FIG. 1;

FIG. 3 is a schematic diagram of a rear cover of a terminal device of an embodiment;

FIG. 4 is a partial flow diagram of a method of manufacturing a back cover according to one embodiment;

fig. 5 is a flowchart of step S100 of the method of processing the rear cover shown in fig. 4;

FIG. 6 is a partial flow diagram of a method of manufacturing a back cover according to one embodiment;

FIG. 7 is a partial flow diagram of a method of manufacturing a back cover according to one embodiment;

FIG. 8 is a partial flow diagram of a method of manufacturing a back cover according to one embodiment;

fig. 9 is a schematic block structure diagram of a terminal device according to an embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

As used herein, "terminal device" refers to a device capable of receiving and/or transmitting communication signals including, but not limited to, devices connected via any one or more of the following connections:

(1) via wireline connections, such as via Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connections;

(2) via a Wireless interface means such as a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter.

A terminal device arranged to communicate over a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

(1) satellite or cellular telephones;

(2) personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities;

(3) radiotelephones, pagers, internet/intranet access, Web browsers, notebooks, calendars, Personal Digital Assistants (PDAs) equipped with Global Positioning System (GPS) receivers;

(4) conventional laptop and/or palmtop receivers;

(5) conventional laptop and/or palmtop radiotelephone transceivers, and the like.

Referring to fig. 1 and 2, the present application discloses a terminal device 10, the terminal device 10 including a display screen 100, a middle frame 200, and a rear cover 300, the display screen 100 being attached to one side of the middle frame 200, and the rear cover 300 being attached to the opposite side of the middle frame 200. The display screen 100 may be used to display information and provide an interactive interface for a user, the middle frame 200 is provided at the outer circumference of the display screen 100 and is used to provide structural rigidity, and the external appearance of the terminal device 10 is mainly presented by the rear cover 300. In some embodiments, the terminal device 10 is a smartphone. In other embodiments, the terminal device 10 may be a smart watch, a handheld game console, a tablet computer, or the like. In some embodiments, the middle frame 200 may be integrally formed with the rear cover 300.

Referring to fig. 3, in some embodiments, the rear cover 300 is substantially rectangular sheet-shaped, which may include opposing first and

second surfaces

310 and 320. After the rear cover 300 is assembled with the middle frame 200, the first surface 310 is exposed to the outside, and the second surface 320 faces the inside of the terminal device 10.

In some embodiments, the rear cover 300 has a 3D shape, that is, the first surface 310 and the second surface 320 are both arc-shaped. In other embodiments, the rear cover 300 may be a 2D structure or a 2.5D structure.

Referring to fig. 4, the present application discloses a method for processing a rear cover 300, and the method for processing the rear cover 300 is used to manufacture the rear cover 300 of the terminal device 10, so as to improve the decorative effect of the rear cover 300. The present application describes the back cover 300 having a 3D structure as an example, but it is understood that the back cover 300 having a 2D structure or a 2.5D structure may be adapted to the processing step for forming the outer shape of the back cover 300.

Referring to fig. 4, the method of processing the rear cover 300 includes the steps of:

s100: a colored glass substrate is provided.

The rear cover 300 may include a first surface 310 and a second surface 320 which are oppositely disposed, and in the embodiment where the rear cover 300 is a 3D structure, both the first surface 310 and the second surface 320 are arc-shaped. The colored glass is not limited to blue glass, red glass, black glass, yellow glass, or mixed color glass of two or more colors. The blue glass generally contains Co element for color development, and the red glass generally contains Co element for color developmentAu or Cu, the black glass generally contains Fe and Co for color development, and the yellow glass generally contains Ce or Mo for color development. These metal elements for color development are incorporated in the glass component, but are difficult to bond with the fluorosilicate ions in the antiglare etching solution containing fluorosilicate ions. The present application will be described by taking colored glass as an example of blue glass, and the blue glass substrate contains divalent cobalt ions (Co) for color development² ⁺)。

Referring to fig. 5, S100 may specifically include the following steps S110, S120, S130, S140, and S150.

S110: and cutting the colored glass raw material.

In the embodiment where the terminal device 10 is a smart phone, a colored glass material, such as a blue glass material, may be cut according to the size requirement, and a certain machining allowance is reserved. For example, the reserved CNC (Computer numerical control) machining allowance is greater than 0.05 mm.

S120: carrying out CNC engraving processing on the cut colored glass raw material, wherein the CNC engraving processing comprises rough engraving processing and fine engraving processing; the grinding wheel rod adopted by the rough engraving processing is 400# -800#, and the grinding wheel rod adopted by the fine engraving processing is 1000# -1200 #.

After CNC engraving processing is carried out on the cut colored glass raw material, the required shape can be obtained, and the requirement on size is met.

S130: and polishing the edge of the CNC-engraved colored glass raw material by using a rotating pig hair brush for 18-22 min.

After the edge of the color glass raw material is polished, burrs on the edge can be removed, so that the edge of the color glass raw material becomes smooth. The polishing time may be 19min, or 20min, or 21min, etc.

S140: and (3) carrying out hot bending processing on the color glass raw material with the polished edge by adopting a resistance heating hot bending machine, wherein the hot bending processing temperature is 680-750 ℃, the preheating time is 500-700 s, the pressure maintaining time is 350-520 s, and the cooling time is 500-900 s.

By hot-bending the colored glass raw material, a 3D structure can be obtained, i.e., the first surface 310 and the second surface 320 are both arc-shaped.

S150: under the action of polishing solution and cerium oxide powder, polishing the hot-bent colored glass raw material by using a mixed brush, wherein the polishing pressure is 250kg-450kg, the polishing time is 2400s-4800s, and the polishing removal amount is 0.1mm-0.2mm, so as to obtain the colored glass substrate.

In some embodiments, the mixing brush may comprise nylon and pig hair. It is understood that, for the rear cover 300 of the terminal device 10, the first surface 310 is exposed to the outside for presenting the appearance effect, and therefore, the step S150 may be performed on the first surface 310.

After step S150, a colored glass substrate for subsequent processing can be obtained. The colored glass substrate is of a 3D structure and meets the requirements of size, surface roughness and the like.

S200: and carrying out ion exchange treatment on the color glass substrate to improve the concentration of ions used for generating fluorosilicate on the surface layer of the color glass substrate, thereby obtaining the glass substrate.

Taking blue glass as an example, divalent cobalt ions (Co) are distributed in the blue glass²⁺). In the related art, the distribution of the fluosilicate crystals on the surface layer of the blue glass directly determines the distribution of the snowflake textures. Using a catalyst containing fluosilicic acid radical ions (SiF)₆ ^2-) In the process of etching blue glass by the anti-dazzle etching solution, divalent cobalt ions in the blue glass are difficult to combine with fluosilicate ions in the anti-dazzle etching solution to generate fluosilicate crystals, so that the problem that the etched blue glass has no snowflake texture in a large area easily occurs, and the yield is low. For colored glass with other colors, the ions for color development in the colored glass are difficult to combine with fluosilicic acid radicals in the anti-dazzle etching solution to generate fluosilicate crystals, so that the problem of low yield is easily caused in the process of forming snowflake textures by etching treatment.

In the present embodiment, the concentration of fluorosilicate-generating ions on the surface of the colored glass substrate is increased by performing ion exchange treatment on the colored glass substrate, and the fluorosilicate-generating ions are more easily combined with fluorosilicate ions in the anti-glare etching solution to generate fluorosilicate crystals than the coloring ions in the colored glass substrate, thereby forming snowflake patterns, and the above-described method for processing the rear cap 300 can improve the decorative effect of the rear cap 300 compared to a process for plating a color film on transparent glass.

Specifically, the step of performing the ion exchange treatment on the colored glass substrate includes the following step S210.

S210: carrying out salt bath treatment on the colored glass base material, wherein the heating medium for the salt bath treatment comprises potassium nitrate, the salt bath time is 8-15 min, and the salt bath temperature is 350-450 ℃.

Illustratively, in some embodiments, potassium ions (K) in potassium nitrate are adopted as a heating medium, and after the colored glass base material is subjected to salt bath treatment for 8-15 min at 400 ℃ by adopting 100% by weight of potassium nitrate as a heating medium⁺) The depth of the potassium fluoride ion which can enter the surface layer of the colored glass substrate is 3-5 μm, so that the surface layer of the colored glass substrate is rich in potassium ions which are easy to combine with fluosilicic acid radical ions. Taking blue glass as an example, after the blue glass passes through the step S210, the surface layer of the blue glass can be rich in potassium ions, and when the blue glass is etched by using the anti-glare etching solution containing fluorosilicate ions, the fluorosilicate ions in the anti-glare etching solution can combine with the potassium ions on the surface layer to generate potassium fluorosilicate (K)₂SiF₆) Crystallizing, and further processing to form uniformly distributed snowflake textures on the surface layer of the blue glass, thereby obtaining a better decorative effect.

It is understood that, with respect to the rear cover 300 of the terminal device 10, the first surface 310 is exposed to the outside and may be used to present an appearance effect, and therefore, during the salt bath treatment of the colored glass base material, the concentration of the ions for generating fluorosilicate on the first surface 310 side may be increased to a desired concentration, and the second surface 320 side may not be required, so as to reduce the difficulty of processing.

As shown in fig. 4, in some embodiments, after the step of performing the ion exchange treatment on the colored glass base material and before the step of performing the etching treatment on the glass substrate, the following step S300 is further included.

S300: and spraying a protective film layer on the second surface 320, wherein the spraying air pressure is 200kPa-400kPa, the spraying speed is 300mm/s-500mm/s, and the distance between the spray gun and the second surface 320 is 30cm-50 cm.

Before the colored glass substrate is subjected to etching treatment, a protective film layer can be sprayed on the surface of the colored glass substrate, such as the second surface 320, which does not need to be etched to form a snowflake texture, and the protective film layer is not easy to react with the anti-glare etching solution, so that the second surface 320 which does not need to be etched can be protected.

Illustratively, in some embodiments, the protective film layer is an acid resistant ink. In other embodiments, the protective film layer may be made of other materials. It is understood that the protective film layer is not necessary, that is, the step S300 may be omitted.

Referring to fig. 6, after the step of performing the ion exchange treatment on the colored glass base material and before the step of performing the etching treatment on the glass substrate, the following steps S410, S420, S430, and S440 may be further included.

S410: and carrying out first overflow water washing on the glass substrate, wherein the water temperature is normal temperature, and the soaking time is 1.3-1.7 min.

The water used for washing can be normal temperature, the water used for washing is subjected to overflow treatment, and the soaking time can be 1.5min, or 1.4min, or 1.6 min.

S420: and 5% hydrofluoric acid solution is adopted for bubbling acid cleaning, the soaking time is 20-30 s, and the replacement frequency of the hydrofluoric acid solution is 12 h/time.

S430: and carrying out overflow water washing for the second time, wherein the water temperature is normal temperature.

The water used for the second overflow water washing can be at normal temperature, and the overflow treatment is adopted to wash away the residual hydrofluoric acid on the surface of the glass substrate.

S440: soaking in water at 13-17 deg.C for 1.4-1.6 min to make the glass substrate in flat state.

For example, the glass substrate may have a soaking temperature of 15 ℃, a soaking time of 1.5min, and a frequency of replacing water used for soaking may be 6 hours/time. The glass substrate is taken out of the water in a lying state, so that the uniformity of a water film on the surface of the glass substrate can be ensured, and uniform snowflake textures can be formed by etching treatment.

After the above steps S410, S420, S430, and S440, the glass substrate may be etched in step S500.

S500: and etching the glass substrate by using the anti-dazzle etching solution containing the fluorine silicate ions to form the snowflake texture.

Specifically, in step S500 of performing an etching process on a glass substrate, the method includes the steps of:

s510: the glass substrate is inclined 15-20 degrees relative to the liquid level of the anti-dazzle etching solution and is immersed into the anti-dazzle etching solution for etching along the direction vertical to the liquid level, the speed of immersing the glass substrate into the anti-dazzle etching solution is 590-610 mm/s, the temperature of the anti-dazzle etching solution is 15-18 ℃, and the immersion time is 2.5-3.5 min.

For example, the glass substrate may be inclined at 16 ° with respect to the liquid surface of the anti-glare etching solution and immersed in the anti-glare etching solution in a direction perpendicular to the liquid surface at a speed of 600mm/s, at a temperature of 16 ℃, and for a time of 3min, thereby forming a snowflake texture on the first surface 310 side.

Referring to fig. 7, after the glass substrate is subjected to the etching process, the following steps may be further continued.

S610: and (3) washing the etched glass substrate with water at the temperature of 30-45 ℃.

The etched glass substrate is washed with water to dissolve part of the crystals on the surface of the glass substrate.

S620: and (3) carrying out acid washing by adopting a 10% sulfuric acid solution, and shaking the glass substrate in the acid washing process.

Through step S620, the crystal salt attached to the surface of the glass substrate may be washed away.

S630: and carrying out overflow water washing for the third time, wherein the water temperature is normal temperature.

The water used for the third overflow water washing can be at normal temperature, and the overflow treatment is adopted to wash away the residual sulfuric acid and crystal substances on the surface of the glass substrate.

In the embodiment where the protective film layer is disposed on the second surface 320, after the steps S610, S620, and S630, the protective film layer may be cleaned to facilitate subsequent processing.

Referring to fig. 8, after the step S630 of the third overflow water washing, a step S700 may be further included.

S700: and chemically polishing the glass substrate by using a mixed solution of hydrofluoric acid, sulfuric acid and hydrochloric acid.

After the glass substrate is chemically polished by the mixed solution, the sharp part of the crystal formed after etching treatment can be passivated, so that stress concentration points are reduced, and cracking is avoided when the rear cover 300 falls.

Steps S810 and S820 may be further included after step S700 of chemically polishing the glass substrate.

S810: carrying out first strengthening treatment on the glass substrate by utilizing 38% of sodium nitrate and 62% of potassium nitrate in percentage by weight respectively, wherein the temperature of the first strengthening treatment is 395-405 ℃, and the time is 140-150 min.

For example, the temperature of the first strengthening treatment may be 400 ℃, and the time may be 145 min.

S820: and (3) carrying out secondary strengthening treatment on the glass substrate subjected to the primary strengthening treatment by utilizing 9% of sodium nitrate and 91% of potassium nitrate in percentage by weight respectively, wherein the temperature of the secondary strengthening treatment is 395-405 ℃, and the time is 25-35 min.

For example, the temperature of the second strengthening treatment may be 400 ℃ and the time may be 30 min.

After step S820 of performing the second strengthening process on the glass substrate, steps S910, S920, and S930 may be further included.

S910: and adhering a decorative film on the second surface 320 of the glass substrate by using a vacuum laminating machine under the condition that the vacuum degree is not more than-96 kPa, wherein the hardness of the decorative film is 30A-50A.

In other words, for the second surface 320 that does not need the etching process, a vacuum laminator may be used to attach a decorative film to the second surface 320, and the decorative film is not limited to an optical film or a color film for improving the decorative characteristics of the rear cover 300. In the film pasting process, the film pasting rhythm can be controlled to be 1pcs/15 s.

S920: maintaining the pressure of the decorative film at 8-15 kg and 50-80 deg.C for 20-40 min.

The step can eliminate air bubbles between the decorative film and the glass substrate, so that the decorative film is reliably attached to the glass substrate and forms a better decorative effect.

S930: at vacuum degree greater than 5 x 10^-2And evaporating the perfluoropolyether film layer on the first surface 310 of the glass substrate by using an evaporator under the condition of Pa.

Specifically, silicon dioxide (SiO) may be evaporated on the first surface 310₂) With a perfluoropolyether material such that the layer of the mixture film is uniformly distributed over the first surface 310. The water drop angle of the film layer formed by evaporation is 100-115 degrees. Wherein the silica in the mixture may be omitted.

After step S930 is completed, a semi-finished product of the rear cover 300 may be obtained. After subsequent spraying and edge repairing and the operation of pasting auxiliary materials (such as foam, gum or camera decorative ring and the like), a finished product of the rear cover 300 can be obtained.

In the embodiment of the present application, after the ion exchange treatment is performed on the colored glass substrate, the concentration of ions for producing fluorosilicate in the surface layer of the colored glass substrate can be increased. In the etching process, ions for generating fluorosilicate can easily generate fluorosilicate with the anti-dazzle etching solution containing fluorosilicate ions, so that uniformly distributed snowflake textures are formed on the surface layer of the glass, and the problem that large-area snowflake textures are not generated due to the fact that the developing ions of the colored glass substrate are difficult to form fluorosilicate is solved.

The rear cover 300 obtained in the embodiment of the present application can obtain a more prominent texture without coating or pasting, and can be further combined with a process of coating a color film or an optical film or pasting to obtain more and more beautiful products.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a terminal device 10 according to an embodiment of the present application. The terminal device 10 may include a Radio Frequency (RF) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a Wireless Fidelity (WiFi) module 507, a processor 508 including one or more processing cores, and a power supply 509. Those skilled in the art will appreciate that the terminal device 10 configuration shown in fig. 9 does not constitute a limitation of the terminal device 10 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The rf circuit 501 may be used for receiving and transmitting information, or receiving and transmitting signals during a call, and in particular, receives downlink information of a base station and then sends the received downlink information to one or more processors 508 for processing; in addition, data relating to uplink is transmitted to the base station. In general, radio frequency circuit 501 includes, but is not limited to, an antenna, at least one Amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the radio frequency circuit 501 may also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), and the like.

The memory 502 may be used to store applications and data. Memory 502 stores applications containing executable code. The application programs may constitute various functional modules. The processor 508 executes various functional applications and data processing by executing application programs stored in the memory 502. The memory 502 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the terminal device 10, and the like. Further, the memory 502 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 502 may also include a memory controller to provide the processor 508 and the input unit 503 access to the memory 502.

The input unit 503 may be used to receive input numbers, character information, or user characteristic information (such as a fingerprint), and generate a keyboard, mouse, joystick, optical, or trackball signal input related to user setting and function control. In particular, in one particular embodiment, the input unit 503 may include a touch-sensitive surface as well as other input devices. The touch-sensitive surface, also referred to as the touch-sensitive display 100 or touch pad, may collect touch operations by a user (e.g., operations by a user on or near the touch-sensitive surface using a finger, a stylus, or any other suitable object or attachment) thereon or nearby, and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 508, and can receive and execute commands sent by the processor 508.

The display unit 504 may be used to display information input by or provided to the user and various graphical user interfaces of the terminal device 10, which may be made up of graphics, text, icons, video, and any combination thereof. The display unit 504 may include a display panel. Alternatively, the Display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlay the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor 508 to determine the type of touch event, and then the processor 508 provides a corresponding visual output on the display panel according to the type of touch event. Although in FIG. 9 the touch sensitive surface and the display panel are two separate components to implement input and output functions, in some embodiments the touch sensitive surface may be integrated with the display panel to implement input and output functions.

The terminal device 10 may also include at least one sensor 505, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that turns off the display panel and/or the backlight when the terminal device 10 is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured in the terminal device 10, detailed description thereof is omitted.

The audio circuit 506 may provide an audio interface between the user and the terminal device 10 through a speaker, microphone. The audio circuit 506 can convert the received audio data into an electrical signal, transmit the electrical signal to a speaker, and convert the electrical signal into a sound signal to output; on the other hand, the microphone converts the collected sound signal into an electric signal, which is received by the audio circuit 506 and converted into audio data, and then the audio data is processed by the audio data output processor 508, and then the audio data is sent to, for example, another terminal device 10 via the radio frequency circuit 501, or the audio data is output to the memory 502 for further processing. The audio circuitry 506 may also include an earphone jack to provide communication of a peripheral earphone with the terminal device 10.

Wireless fidelity (WiFi) belongs to short-range wireless transmission technology, and the terminal device 10 can help the user send and receive e-mail, browse web pages, access streaming media and the like through the wireless fidelity module 507, and provides wireless broadband internet access for the user. Although fig. 9 shows the wireless fidelity module 507, it is understood that it does not belong to the essential constitution of the terminal device 10, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 508 is a control center of the terminal device 10, connects various parts of the entire terminal device 10 with various interfaces and lines, and performs various functions of the terminal device 10 and processes data by running or executing an application program stored in the memory 502 and calling up data stored in the memory 502, thereby performing overall monitoring of the terminal device 10. Optionally, processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor, which primarily handles operating systems, user interfaces, application programs, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 508.

The terminal device 10 also includes a power supply 509 to supply power to the various components. Preferably, the power supply 509 may be logically connected to the processor 508 through a power management system, so that the power management system may manage charging, discharging, and power consumption. The power supply 509 may also include any component such as one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and the like.

Although not shown in fig. 9, the terminal device 10 may further include a bluetooth module or the like, which is not described in detail herein. In specific implementation, the above modules may be implemented as independent entities, or may be combined arbitrarily to be implemented as the same or several entities, and specific implementation of the above modules may refer to the foregoing method embodiments, which are not described herein again.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The processing method of the rear cover is characterized by comprising the following steps:

providing a colored glass substrate;

2. The method for processing a rear cover according to claim 1, wherein the step of performing the ion exchange treatment on the colored glass substrate includes:

3. The method of claim 2, wherein the colored glass substrate includes first and second opposing surfaces, and further comprising, after the step of subjecting the colored glass substrate to the ion exchange treatment and before the step of subjecting the glass substrate to the etching treatment:

4. The method for processing a rear cover according to claim 2, wherein the step of etching the glass substrate includes:

5. The method for processing a rear cover according to claim 4, further comprising, after the step of performing the ion exchange treatment on the colored glass base material and before the step of performing the etching treatment on the glass substrate:

carrying out first overflow water washing on the glass substrate, wherein the water temperature is normal temperature, and the soaking time is 1.3-1.7 min;

carrying out secondary overflow washing with water at normal temperature; and

soaking the glass substrate in water at the temperature of 13-17 ℃ for 1.4-1.6 min, and taking the glass substrate out of the water in a lying state;

washing the etched glass substrate with water at the temperature of 30-45 ℃;

6. The method for processing a rear cover according to claim 5, further comprising, after the step of third overflow water washing:

7. The method of processing a rear cover according to claim 6, further comprising, after the step of chemically polishing the glass substrate:

8. The method of claim 7, wherein the colored glass substrate comprises a first surface and a second surface opposite to each other, and further comprises, after the step of performing the second strengthening treatment on the glass substrate:

9. The method of processing a rear cover according to any one of claims 1 to 8, wherein in the step of providing a colored glass substrate, the method comprises:

cutting the color glass raw material;

10. A rear cover, characterized in that it is manufactured by the method of manufacturing a rear cover according to any one of claims 1 to 9.

11. A terminal device comprising a display screen, a middle frame, and the back cover of claim 10, wherein the display screen is attached to one side of the middle frame, and the back cover is attached to an opposite side of the middle frame.