Laser Welding in Smart Phone Manufacturing

With the continuous enrichment of smartphone functions, the structure of mobile phones is becoming more and more complex. A small area has been compressed over countless times by engineers in exchange for the best design effect. In the face of such complex processing, subtle unevenness will affect the operation of the entire mobile phone, so in order to ensure the perfect inlay and integration of each component, it is necessary to use the extremely high-precision welding processing method – laser welding.

The laser welding machine uses high-energy laser pulses to heat the material in a small area. The energy of the laser radiation diffuses the material through heat conduction, and the material is melted to form a specific molten pool to achieve the purpose of welding. Laser welding has small heat-affected zone, small deformation, fast welding speed, smooth and beautiful welding seam, and is suitable for welding various parts of mobile phones. So what parts on the mobile phone need to be laser welded?

Application on the spring clips of outer and middle frame

The mobile phone spring clip connects the aluminum alloy middle frame with some other material structural parts of the mobile phone middle plate.

The metal clip is welded to the conductive position by laser welding, which can enhance anti-oxidation and anti-corrosion. Materials including gold-plated aluminum, copper-plated steel, and gold-plated steel as clip can also be applied to mobile phone parts by laser welding of metal parts.

Application on USB cable power adapter

USB cables and power adapters play an important role in our lives. At present, many manufacturers of electronic cables use laser welding technology for production.

Because the shielding shell and USB head of the mobile phone cable are made of stainless steel, and the welding position is very small. Laser welding machine is a kind of precision welding equipment which creates little welding heat, so the electronic components inside will not be damaged during welding. The welding strength is strong with high welding speed. It can realize automatic welding and ensure the durability and reliability of mobile phone cables.

Application between internal metal parts

The welding seam of the traditional welding method is not fine, and it is easy to deform the periphery of the product, and it is prone to desoldering. However, the internal structure of the mobile phone is precise. When welding is used for connection, the area of the welding point is required to be small. Therefore, most of the welding between the main parts in the mobile phone requires laser welding.

Common mobile phone parts welding include laser welding for resistance capacitor, mobile phone stainless steel nut, mobile phone camera module, and mobile phone radio frequency antenna. The laser welding machine does not require tool contact in the process of welding the camera of the mobile phone, avoiding the surface damage of the device caused by the contact between welding gun and the device surface, and the processing accuracy is higher. It is a new type of microelectronic packaging and interconnection technology, which can be perfectly applied in the mobile phone.

Application on chip and PCB board

The mobile phone chip usually refers to the chip used in the communication function of the mobile phone. The PCB board is the support body of the electronic components and the provider of connection for the electronic components. With the development of mobile phones in the direction of lightness and thinness, traditional soldering is no longer suitable for welding internal parts in mobile phones.

Using laser welding technology to weld the mobile phone chip, the welding seam is exquisite, and there will be no undesirable conditions such as desoldering.

Senfeng Laser, provides world-class laser welding machines for more efficient and delicate welding in microelectronic industries.

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