Laser Pointers

イベント説明

Analysis of Laser Reflow Soldering Technology
Perfect spot solder paste system, it can be based on the heating needs of different products, the use of a variety of technical methods to complete the welding of the solder joints. And other heating methods similar to misuse of high power laser pointer energy is easy to burn parts. Laser heaters take advantage of the transfer and absorption characteristics of the laser energy to create a reflow environment based on the reflow characteristics of the solder paste, which can make very difficult welding tasks possible at very high lead-through rates.
The use of a sample as a reflow test is a proven method to determine if laser reflow is suitable for the product and the process parameters that must be controlled in order to achieve the desired solder joint quality. Theoretical analysis of laser work is one thing, but the practical application is another matter. If the reflow of a solder paste is done as a viable method on a product, then the best combination of materials and equipment can be worked with the solder paste and laser equipment system suppliers.
Carbon dioxide lasers are currently the strongest continuous wave laser pointers available. The carbon dioxide laser can produce infrared light with a wavelength of about 10,600 nm and a power of 20%. CO2 lasers are used for metal cutting and welding. Carbon dioxide lasers are made of yttrium aluminum garnet doped neodymium metal, commonly referred to as Nd: YAG lasers. Nd: YAG laser can produce high energy, in the infrared spectrum of the wavelength of 1,064nm. Similar to CO2 lasers, they are used primarily for cutting and welding metals, as well as for marking metals and other materials. High-power diode lasers (HDLs) rely primarily on GaAs semiconductors. Can provide a range of 790 ~ 980nm wavelength and output power of each 50 watts. The advances in diode cooling technology aimed at maintaining diode temperatures have significantly increased diode power, lifetime, and efficiency over the past few years.
Some users choose to use laser heating, because in many ways it is the best option; while other users are found, because the feasible means of heating is very limited, the laser will solve their heating problems faced by the program. The most direct reason for using burning laser pointer heating is the desire to perform non-contact, local heating. Although the motives vary, the purpose is the same: reflow is limited to a certain location and will not affect other areas, and in a very short period of time to complete, so as to effectively prevent other parts of the product is conducted more heat .
The solder paste is spotted on all pads before the cable is placed. Laser heating is followed by a point solder paste process, in a line to complete, and the heat just to form the solder joints. The solder is in the molten state for no more than 3 seconds. The amount of heat transferred to the surface of the glass substrate upon heating is small and thermal expansion burst can be prevented. While the appearance of the solder joints meet the consistency requirements. As with the previous process, solder paste was placed on each pin, and each pin was heated separately with a green laser pointer. The first pin was heated longer than the fourth pin due to thermal conductivity. The local heating temperature is sufficient and the total heat is safe for the plastic parts.

開催日

2016年12月21日17:24 ～ 2016年12月31日17:24

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laserman123

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