Off-line positive pressure welding furnace system and operation method thereof
An operation method and welding furnace technology, which are applied in welding equipment, auxiliary devices, printed circuits, etc., can solve the problems of high void rate on the welding surface, which affects product reliability, product quality, and product performance. Product quality and work efficiency, excellent performance, and the effect of improving quality
Inactive Publication Date: 2020-10-23
薛星海
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Problems solved by technology
During the welding process, the solder paste is heated to generate gas. In order to make the air bubbles in the solder paste overflow, if the existing welding furnace adopts normal pressure welding, the void rate of the welding surface will be too high and affect product reliability. If negative pressure welding is used The method will cause the flux or tin beads to splash on the surface of the substrate or chip when the bubble bursts, which will easily affect the performance of the product and have a great impact on the quality of the product.
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[0030] The technical solutions in the embodiments of the present application are clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.
[0031] figure 1 It is a structural schematic diagram of the off-line positive pressure welding furnace system of the present invention. The positive pressure soldering furnace described in this application is a soldering furnace that satisfies the reflow soldering process of solder paste, solder sheet soldering process and eutectic soldering process. like figure 1 As shown, the offline positive pressure welding furnace system includes: computer control center, control system, vacu...
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The invention provides an off-line positive pressure welding furnace system. The system comprises a computer control center, a control system, a vacuum cavity, a heating device, a sensing device and adriving device. The control system can generate a positive pressure welding scheme. The positive pressure welding scheme comprises a preset positive pressure value, a preset negative pressure value and a preset vacuum cavity temperature value in the vacuum cavity and a preset safety temperature for opening the vacuum cavity. The invention further provides an operation method of the off-line positive pressure welding furnace system. The operation method comprises the steps that the positive pressure welding scheme is generated according to the process requirement, wherein the positive pressurewelding scheme comprises the steps that protective gas is introduced to enable the interior of the vacuum cavity to reach the preset positive pressure value; the vacuum cavity is vacuumized, and thepreset extraction time or the preset negative pressure value are reached; according to the obtained positive pressure welding scheme, a welding workpiece in the vacuum cavity is heated and welded; andthe temperature in the vacuum cavity is reduced to the preset safety temperature, and after the pressure reaches the normal pressure, the vacuum cavity is opened. According to the off-line positive pressure welding furnace system, the quality and reliability of products are effectively improved.
Description
technical field [0001] The present application relates to the field of positive pressure welding furnaces, in particular to an off-line positive pressure welding furnace system and its operating method. Background technique [0002] In the prior art, for soldering of electronic chips, a reflow soldering machine can be used for soldering, and the application of the reflow soldering machine is becoming more and more extensive, and has been applied in almost all electronic product fields. The specific method for welding chips in existing welding furnaces is to place the chip and the substrate to be welded in a vacuum chamber, and heat the chip and the substrate, so that the chip on the substrate in the vacuum chamber can be bonded with the melted solder paste or preformed solder sheet. The substrates are soldered together. Since different solder pastes have different characteristics, when soldering, it is necessary to control the temperature according to the ideal temperature ...
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Login to View More IPC IPC(8): B23K1/008B23K3/00B23K3/08B23K101/42
CPCB23K1/008B23K3/00B23K3/08
Inventor 薛星海
Owner 薛星海