With the rapid development of electronic science, Internet and other modern science and technology, the application of precision optical components continue to digital cameras, notebook computers, cell phones, security surveillance cameras, car visual systems, smart homes and aerial drones and other closely related to human life in many optical imaging field penetration. Especially since 2000, the rapid development of communication networks and the Internet and other industries, China has become one of the most important markets for precision optical components in the world with such huge downstream market demand, and the development of China's precision optical components industry has entered the fast lane.
So what is optical components? Optical components refer to the use of optical principles for a variety of observation, measurement, analysis and recording, information processing, image quality evaluation, energy transfer and conversion activities of the main devices of the optical system, is the manufacture of a variety of optical instruments, image display products, optical storage equipment, an important part of the core components. According to the classification of precision and use, it can be divided into traditional optical components and precision optical components.
Traditional optical components are mainly used in traditional cameras, telescopes, microscopes and other traditional optical products; precision optical components are mainly used in smart phones, projectors, digital cameras, video cameras, copiers, optical instruments, medical equipment and various precision optical lenses. It is the product of the combination of traditional optical manufacturing and modern information technology, and is influenced by the industrial policy of downstream application fields.
With the development of optical technology, the design of various types of optical equipment tends to be high-precision and compact, which inevitably requires its internal optical system to gradually develop in the direction of high-precision and miniaturization, which in turn puts forward higher requirements for the transfer and fixation of optical components in the optical system.
The brazing process is a simple method with low operational difficulty, and the components connected by the brazing process have good performance, high reliability, and good production consistency, so it is widely used in the connection and assembly of various products. Laser soldering machine is an extension of laser brazing technology, according to the different brazing process, can be divided into wire welding, solder paste welding and spray tin ball welding three kinds of process equipment; with high energy density, welding speed, almost no welding deformation and other advantages, can greatly improve the quality of welding.
Laser wire soldering
Wire-fed soldering, generally using a semiconductor laser as the heat source, with a wire-fed mechanism with an automated platform, simulating manual soldering iron for welding. This process can be adapted to most soldering scenarios, such as PCB circuit boards, optical components, acoustic components, semiconductor refrigeration components and other 3C electronic components soldering.
Laser Solder Paste Soldering
Laser soldering is divided into two methods: pre-filled solder paste and pre-impregnated solder. These two methods are pre-filled with brazing material, and then heated by laser irradiation to achieve the connection between the wire and PCB. This process method is suitable for soldering in terms of optical communication modules, optical components, wire connectors, especially the connection of very fine coaxial wires to PCB boards.
As the solder paste will splash during the laser heating process, and the pre-soldering is easy to oxidize, which will easily hinder the effective connection. In response to these problems, Zichen Laser uses pulsed lasers, which can effectively improve the above problems generated by the bad products, because its first pulse available, continuous mode can be selected, pulse width can be modified online and other features, can be well adapted to different energy density requirements, so as to solve the paste spatter and pre-tin oxidation caused by bad welding, and its spot is smaller compared to the semiconductor, more suitable for the very fine coaxial wire and PCB board soldering.
Laser solder ball soldering
The advantage of laser solder ball soldering is that the melting of the solder ball only heats the solder pad locally and has no thermal effect on the overall package; since the connection process is non-contact and the laser does not act directly on the pad, it does not cause damage to the device to be soldered. According to its process characteristics, for different sizes of tin ball (0.07mm-1.2mm) this process method has a broad application prospect in mechanical hard disk head, cell phone camera module and other 3C industry on fine welding.
