CN102137560A - Coloured shell and surface treatment method thereof - Google Patents

Abstract

The invention discloses a coloured shell and a surface treatment method thereof. The coloured shell has a base material, a coloured layer and a bonding layer. The surface of the base material has at least one smooth area and the coloured layer covers the smooth area of the base material. The coloured layer contains titanium metal, wherein the coordinates of a chroma area of the coloured layer in the smooth area in a coherent infrared energy (CIE) LAB colour system are as follows: L* coordinate is 51.55-52.55; a* coordinate is 13.12-14.12; and b* coordinate is 6.27-7.27. The bonding layer is arranged between the base material and the coloured layer so as to bond the base material with the coloured layer.

Description

Shell with color and surface treatment method thereof

technical field

The invention relates to a colored shell and its surface treatment method, in particular to a shell with specific color and metal texture and its processing method.

Background technique

With the rapid development of technology, various electronic devices such as mobile phones, PDAs (Personal Digital Assistant), personal computers and notebook computers are developing rapidly, and their functions are becoming more and more abundant. In order to make the casing of the electronic device rich in color, traditionally, colored plastics can be used to form the colored plastic casing, or a color layer is formed on the surface of the casing of the electronic device by spraying paint. However, plastic shells and painted shells cannot present a good metallic texture. On the other hand, because the technology of metal coating itself is relatively complicated and difficult to be precisely controlled, the conventional technology can only form a few traditional metal colors on the surface of the shell, and has not made a breakthrough in rich color texture.

Contents of the invention

In view of this, the present invention provides a colored casing with a specific color and a surface treatment method thereof to solve the conventional problems.

A colored shell includes a base material, a colored layer and a combination layer. The surface of the base material comprises at least one smooth area, and the color layer covers the smooth area of the base material, wherein the color layer comprises titanium metal, and the chromaticity area presented by the color layer in the smooth area is defined in the International Commission on Illumination (Commission internationale de l'éclairag , The L* coordinates of the CIE) LAB colorimetric system are between 51.55 and 52.55, the a* coordinates are between 13.12 and 14.12, and the b* coordinates are between 6.27 and 7.27. The bonding layer is disposed between the base material and the color layer to join the base material and the color layer.

A surface treatment method for a colored housing includes the following steps: providing a base material; forming a bonding layer to cover the surface of the base material; and forming a color layer by using a physical vapor deposition process to cover the surface of the bonding layer, wherein The chromaticity area presented by the color layer has an L* coordinate of 51.55 to 52.55 in the CIE LAB color system, a* coordinates of 13.12 to 14.12, and b* coordinates of 6.27 to 7.27.

Compared with the prior art, the colored shell provides a metallic texture of a specific color through its colored layer.

Description of drawings

Fig. 1 is a schematic structural diagram of a colored casing according to a preferred embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of a part of the structure of the housing with color in FIG. 1 .

Fig. 3 is the schematic diagram of the range of the color layer in the CIE LAB color system L* coordinate of the preferred embodiment of the present invention.

4 is a schematic diagram of the range of the color layer in the CIE LAB color system a* coordinate and b* coordinate in a preferred embodiment of the present invention.

Fig. 5 is a schematic flow chart of surface treatment of a colored shell in a preferred embodiment of the present invention.

Detailed ways

The following will be described in detail in conjunction with the accompanying drawings, with preferred embodiments and accompanying drawings.

Please refer to Fig. 1 and Fig. 2, the preferred embodiment of the casing with color of the present invention can for example be the casing of a mobile phone, and it comprises a base material 1, a bonding layer 2, a color layer 3 and optional cover layer 4. Wherein the bonding layer 2 is disposed on the surface of the substrate 1 , the color layer 3 is disposed on the surface of the bonding layer 2 , and the covering layer 4 can be disposed on the surface of the color layer 3 .

The base material 1 may comprise metal materials such as stainless steel or ceramic materials such as glass, the base material 1 may have at least one surface to be coated, and the surface to be coated may include areas with different surface structures, for example, at least one smooth area . The bonding layer 2 is disposed between the base material 1 and the color layer 3 to join the base material 1 and the color layer 3 . The material of the bonding layer 2 may include titanium nitride (CrN) or other materials that can provide adhesion. The color layer 3 may include one or more layers of metal materials, such as titanium aluminum alloy. The cover layer 4 may comprise any suitable insulating material to provide a protective effect. Since the colored shell of the present invention has the aforementioned base material 1 , bonding layer 2 and colored layer 3 , the Vickers hardness of the formed colored shell can be greater than or equal to 400HV.

Please refer to Fig. 3 and Fig. 4, when the surface to be coated of base material 1 comprises smooth region, the chromaticity region that color layer 3 provided by the present invention presents in smooth region is in the L * coordinate of CIE LAB color system At 51.55 to 52.55, the a* coordinate may be between 13.12 and 14.12, and the b* coordinate may be between 6.27 and 7.27.

Please refer to Fig. 5, and refer to Fig. 1 and Fig. 2 together, the surface treatment method of the housing with color of the present invention comprises the following steps: first, form the base material 1 of a mobile phone casing, base material 1 is made of metal materials such as stainless steel Or made of ceramic materials such as glass. After the substrate 1 is formed, the surface of the substrate 1 can be further treated to meet the appearance and color quality requirements of the housing, or the flatness of the substrate 1 can be further adjusted so that the bonding layer 2 subsequently formed on its surface has high adhesion.

Secondly, a bonding layer 2 is formed at a predetermined position on the surface of the substrate 1 , for example, the material of the bonding layer 2 preferably includes titanium nitride. In actual production, the bonding layer 2 can be formed on the surface of the substrate 1 by physical vapor deposition process sputtering, with the substrate 1 as the substrate, a titanium target is used for sputtering, and argon is excited by a radio frequency (RF) energy source The gas plasma impacts the target at a flow rate of 27 to 33 standard cubic centimeter per minute (sccm), so that the material on the surface of the target is splashed out and deposited on the surface of the substrate 1 .

Next, a color layer 3 is formed on the surface of the bonding layer 2 . The material of the color layer 3 preferably includes titanium aluminum alloy. In actual production, the color layer 3 can also be formed by physical vapor deposition process sputtering. In a preferred embodiment of the present invention, the physical vapor deposition process for forming the color layer 3 bombards the titanium target with a power of 27 to 33 kilowatts, and the physical vapor deposition process bombards an aluminum target with a power of 9 to 11 kilowatts. The bias voltage of the vapor deposition process is between 216 and 264 volts, the process temperature of the physical vapor deposition process is between 126 and 154 degrees Celsius, the process time of the physical vapor deposition process is between 72 and 88 minutes, and the process pressure of the physical vapor deposition process is between At 3.02 to 3.69 millitorr, the revolution speed of the substrate in the physical vapor deposition process is between 1.8 and 2.2 revolutions per minute (revolution per minute, rpm), and the rotation speed of the substrate in the physical vapor deposition process is between 7.2 and 8.8rpm. For the process gas flow, the physical vapor deposition process includes providing argon and nitrogen, and the flow of argon is 405 to 495 sccm, and the flow of nitrogen is 135 to 165 sccm.

According to the above process steps, the present invention can form the desired specific color and metallic texture on the substrate 1 and the bonding layer 2 . As mentioned above, when the surface to be coated of the substrate 1 is a smooth surface, the chromaticity coordinates (L*, a*, b*) of the color layer 3 formed by the aforementioned process steps are (51.55~52.55, 13.12~14.12 , 6.27~7.27), this is the color range that the conventional colored casing cannot provide.

Thereafter, a covering layer 4 can be selectively formed on the surface of the color layer 3 . The cover layer 4 may comprise any suitable insulating material to provide a protective effect.

It can be understood that the preferred embodiment of the colored casing of the present invention is also applicable to other types of electronic devices such as notebook computers and palmtop computers, or any device that needs to have a specific color and metal texture. When using a mobile phone equipped with a preferred embodiment of the colored housing of the present invention, the color layer covering the surface of the bonding layer can provide a metallic texture of a specific color to meet the requirements for the appearance and color quality of the housing, thereby forming a mobile phone with rich colors and Good metal finish.

It should be pointed out that the above embodiments are only preferred embodiments of the present invention, and those skilled in the art can also make other changes within the spirit of the present invention. These changes made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims (22)

1. colorful housing, it comprises a base material, one color layer, an and binder course, the surface of described base material comprises at least one smooth region, described color layer covers the described smooth region of described base material, described color layer comprises titanium, described binder course is arranged between described base material and the described color layer, to engage described base material and described color layer, it is characterized in that: between 51.55 to 52.55, the a* coordinate is between 13.12 to 14.12 in the L* coordinate of CIE LAB colour system for the chroma areas that described color layer presents in described smooth region, and the b* coordinate is between 6.27 to 7.27.

2. colorful housing as claimed in claim 1 is characterized in that: described base material is metal material or ceramic material.

3. colorful housing as claimed in claim 1 is characterized in that: described binder course comprises titanium nitride.

4. colorful housing as claimed in claim 3 is characterized in that: described binder course is to utilize a titanium target to form in a physical gas-phase deposition.

5. colorful housing as claimed in claim 1 is characterized in that: described color layer comprises titanium-aluminium alloy.

6. colorful housing as claimed in claim 5 is characterized in that: described color layer is to utilize a titanium target and an aluminium target to form in a physical gas-phase deposition.

7. colorful housing as claimed in claim 1 is characterized in that: the Vickers hardness of described colorful housing (Vickers hardness) is more than or equal to 400HV.

8. the surface treatment method of a colorful housing comprises:

One base material is provided;

Form a binder course, cover the surface of described base material; And

Utilize a physical gas-phase deposition to form a color layer, cover described binder course surface, it is characterized in that chroma areas that described color layer presents in the L* coordinate of CIE LAB colour system between 51.55 to 52.55, the a* coordinate is between 13.12 to 14.12, and the b* coordinate is between 6.27 to 7.27.

9. surface treatment method as claimed in claim 8 is characterized in that: described base material is metal material and ceramic material.

10. surface treatment method as claimed in claim 8 is characterized in that: the step that forms described binder course comprises a physical gas-phase deposition.

11. surface treatment method as claimed in claim 10 is characterized in that: described physical gas-phase deposition comprises and utilizes a titanium target to carry out sputter, and described binder course comprises titanium nitride.

12. surface treatment method as claimed in claim 8 is characterized in that: described physical gas-phase deposition comprises and utilizes a titanium target and an aluminium target to carry out sputter, and described color layer comprises titanium-aluminium alloy.

13. surface treatment method as claimed in claim 12 is characterized in that: described physical gas-phase deposition bombards the power of described titanium target between 27 to 33 kilowatts.

14. surface treatment method as claimed in claim 12 is characterized in that: described physical gas-phase deposition bombards the power of described aluminium target between 9 to 11 kilowatts.

15. surface treatment method as claimed in claim 8 is characterized in that: the bias voltage of described physical gas-phase deposition is between 216 to 264 volts.

16. surface treatment method as claimed in claim 8 is characterized in that: the technological temperature of described physical gas-phase deposition is between 126 to 154 degree Celsius.

17. surface treatment method as claimed in claim 8 is characterized in that: the process time of described physical gas-phase deposition was between 72 to 88 minutes.

18. surface treatment method as claimed in claim 8 is characterized in that: the operation pressure of described physical gas-phase deposition is between 3.02 to 3.69 milli-torrs.

19. surface treatment method as claimed in claim 8 is characterized in that: described physical gas-phase deposition comprises provides argon gas, and the flow of argon gas between 405 to 495 mark condition milliliter per minutes (standard cubiccentimeter per minute, sccm).

20. surface treatment method as claimed in claim 8 is characterized in that: described physical gas-phase deposition comprises provides nitrogen, and the flow of nitrogen between 135 to 165sccm.

21. surface treatment method as claimed in claim 8 is characterized in that: the revolution rotating speed of described base material in described physical gas-phase deposition between 1.8 to 2.2 rotating speed per minutes (revolution per minute, rpm).

22. surface treatment method as claimed in claim 8 is characterized in that: the rotation rotating speed of described base material in described physical gas-phase deposition between 7.2 to 8.8rpm.

Images