In the second half of 2017, laser has become a super killer in the mobile phone industry since the face recognition of iPhone X using laser sensors. At the same time that Apple followed up the UAV, the laser radar also began to receive intense debate from the media. It seems that black technology has become indispensable. The reason is that the precision and accuracy of laser ranging, as well as the sensitivity and stability of user sensing are the most widely known in optical media. The natural industry has also tried to introduce laser applications.
Users pay more attention to product functions than the application of laser cutting machine manufacturers. Compared with the traditional contact cutting, laser machining has the outstanding advantages of good cutting quality, high cutting efficiency and fast cutting speed. This advantage has proved the trend of alternative applications requiring high-precision and high-efficiency manufacturing in the communication semiconductor industry, consumer electronics manufacturing and automotive industry.
Especially in the mobile phone manufacturing process, such as the brand of mobile phone LOGO, cutting 3D glass and OLED panel, welding metal intermediate frame and welding internal components of mobile phone, these are inseparable from laser processing equipment. In addition to the application of laser technology in mobile phones, the manufacturing process of mobile phones increasingly relies on laser equipment. Basically, there is no process that is impossible to complete laser processing.
Application of laser cutting machine in mobile phone industry
Laser marking: Each mark on the mobile phone is made by a laser device
Laser marking machine is a method with high precision, high speed and clear marking features. This method uses high energy density laser to irradiate the workpiece locally, vaporize or chemically change the surface material to leave permanent marks. Using laser tags as permanent tags on mobile phones can improve anti-counterfeiting capabilities and add value, thus making products look higher and more like brands.
At present, laser marking technology is very mature due to its low price, fast processing speed and good marking quality. It is widely used in the field of mobile phones, mainly for logos, text signs, internal electronic components, circuit board logos, text labels and other surfaces. The marks seen on the phone logo, buttons and covers, batteries and mobile phone accessories are currently made by laser equipment.
Laser cutting: hard and ultra-thin materials can be cut by laser
Laser cutting machine can be used for precision cutting or micro hole processing of small parts (such as metal or non-metallic parts). The utility model has the advantages of high cutting precision, fast speed and small thermal shock. Common laser cutting processes on mobile phones include: sapphire glass mobile phone screen laser cutting, camera protective mirror laser cutting, mobile phone Home key laser cutting, FPC flexible circuit board laser cutting, mobile phone laser drilling, etc.
The laser cutting technology of mobile phone shell is mainly the cutting of shell and screen glass. It is more popular in screen cutting, and many companies usually use one-time molding technology and machining technology on the shell. For example, the shell of the iPhone is stamped on the entire aluminum alloy material and removed layer by layer to keep its groove. This advanced technology is also one of the reasons for the high price
The configuration of the mobile phone is constantly updated, and the appearance of the mobile phone also conforms to the introduction of more new technologies and components, and keeps pace with the times. The application of 3D glass, sapphire lens protective film and OLED screen are typical examples. These materials are either ultra-thin, brittle, or harder and must be treated with laser technology
3D glass cutting on mobile phone.
The full screen with OLED panel as the main material is the mainstream of mobile phones in the next two years. 3D glass is the best choice for OLED panels. Due to the special structure and too thin thickness of 3D glass, the traditional cutting method will lead to lower output. Laser cutting technology is processed by non-contact cutting method. When local temperature rises, stress will be generated, stress will be softened and cracks will be caused, which will break the glass along the laser scanning direction, so that the cutting edge is smooth and flat without cracks. The multi degree of freedom of laser technology is particularly suitable for the processing of bending workpiece, which solves the technical problem of cutting 3D glasses for mobile phones, and is the mainstream of brittle material processing.
Mobile phone camera sapphire cutting.
Now, as far as mobile phone cameras are concerned, dual cameras have become mainstream mobile phone products. Lens protective film and home button of mobile phone camera are widely used sapphire materials, which have better scratch resistance and higher hardness than glass. In addition to the laser cutting machine, this hardness also makes it impossible for ordinary processing to cut it effectively.
OLED panel cutting phone.
OLED panel is an ultra-thin brittle material with double-sided glass structure. The traditional cutting process will lead to edge fracture and collapse. However, for thin glass and ultra-thin glass, laser can be realized by non-contact processing method.
Application of laser cutting machine in mobile phone industry
Laser drilling: It can also be made by laser drilling invisible to the naked eye
In the current mobile phone manufacturing process, laser cutting technology is very common. The internal structure of the mobile phone is generally cut precisely by using the UV UV laser technology, mainly cutting FPC soft boards, PCB boards, soft and hard bonding boards, and covering film laser cutting windows. Laser drilling is also considered part of the laser internal structure cutting.
Laser drilling has the advantages of high efficiency, low cost, small deformation and wide application. The utility model can be used for punching the PCB board, the earphone of the shell, the antenna and the earphone in the mobile phone application. Handheld phones focus on more than 200 components. Mobile phone manufacturers require a fast, high-quality and low-cost stamping process in the manufacturing process of mobile phones. Only the laser focus can be focused on the wavelength level in a very small area. The highly concentrated energy is particularly suitable for processing thin and deep holes with a minimum aperture of only a few microns. The depth and aperture ratio of the hole can be greater than 50 microns.
Laser welding: Only laser can be competent for metal middle frame and mobile phone parts
The laser welding machine uses the laser beam with high energy density as the heat source to melt the surface of the material and solidify it as a whole. The important indexes for judging the welding process include the size of heat affected zone, weld appearance, welding efficiency, etc. Compared with the traditional spot welding and electric arc welding, laser welding has the advantages of small thermal deformation, high efficiency and high precision, but it is relatively expensive at present and has low permeability.
The internal structure of the mobile phone is very exquisite. When connecting by welding, the area of the welding point is required to be small, and the common welding method cannot meet this requirement. Therefore, most of the welding between the main components of the mobile phone is laser welding. After the stainless steel frame is returned to the iPhone again, welding becomes the best choice for connecting the inner middle panel and shell of the iPhone. In addition to the internal structure of the phone, it is also necessary to use laser equipment to complete many chip modules on the phone.
By using metal frame structure on Apple's Samsung mobile phones, more and more brand phones have joined the ranks of metal boxes. Because some mechanical support and forming ability of the glass back cover is weaker than that of the metal material, the camera and other parts still need smaller metal parts as the bracket, and the structural small parts in the metal box can solve this problem. The introduction of small structures means an increase in the welding process. Of course, laser welding alone is sufficient.
Laser etching: high-precision stripping, which cannot be realized without laser
Laser etching mainly refers to the laser etching of conductive glass on the mobile phone screen. Its function is to isolate it on the whole conductive material by laser etching process. This process requires high accuracy, which cannot be recognized by the human eye, so it requires a magnifying glass to see. His etching accuracy is a fraction of the diameter of normal human hair.
LDS laser direct forming: laser forming, saving space to the greatest extent
LDS laser direct forming technology has been widely used in smart phone manufacturing. The advantage is that the direct laser forming technology is used to mark the antenna track on the mobile phone shell. As long as the laser can reach the line and curve, the 3D effect can be created and the space can be saved as much as possible. The mobile phone can also adjust the antenna track at any time. As a result, mobile phones can be made thinner, more complex, and have greater stability and impact resistance.
Laser application of mobile phone: omnipotent projection, induction and focusing, and long-distance charging may be realized in the future
Application of laser cutting machine in mobile phone industry
In addition to requiring laser to participate in the cutting, welding, marking and other production processes in mobile phone manufacturing, more and more applications are being implemented in mobile phones.
First, mobile projection.
As we all know, the Moto Z module mobile phone is equipped with a projection module, which can achieve the projection function required by users only by cooperating with the projection module. The Samsung Galaxy Beam and VOGA V released last year are the main laser projections. These mobile phones are laser applications on mobile phone functions
Second, 3D sensing.
The popular 3D sensor of iPhone X after its release is mainly used for its facial recognition and more powerful augmented reality experience. In fact, 3D sensing uses VCSEL laser sensors. Moreover, iPhone X will lead more mobile phones equipped with 3D sensing function and create a market of 100 billion
Third, laser focusing.
The mobile phone records the distance from the target to the test instrument by recording the infrared laser emitted from the device, reflected by the target surface and finally received by the rangefinder. After LG G3 first used this technology, iPhone 8, Huawei mate 10, Glory V9 and Moto z2 models all introduced laser focusing technology. However, the application is slightly different. For example, the iPhone 8 mainly uses laser focus to enhance AR functions.
Fourth, laser charging.
In October 2016, the Russian "Energy" Rocket and Space Company carried out a special experiment, using lasers to charge mobile phones 1.5 kilometers away. The experiment was carried out on two buildings, one equipped with a laser emission device, and the other installed on a building 1.5 kilometers away. The building can convert laser energy into electrical energy through special instruments. Of course, the experiment is to verify the feasibility, and the ultimate goal is to charge its cargo spaceship.
To sum up, the application of laser in mobile phone manufacturing process is mainly used for cutting and welding of mobile phone appearance and internal structure, as well as drilling and marking. In addition to the use of lasers in the manufacturing process of mobile phones, the use of lasers in mobile phones is becoming more and more practical. In fact, many current mobile phone technologies cannot be realized without the use of laser devices.
From the appearance of the mobile phone to the internal structure of the mobile phone, to the manufacturing of mobile phone components, all these are inseparable from the laser equipment. It can be said that there is no mobile phone without laser.