Surface Mount Component Pin Deoxidation Method
A component and deoxidation technology, used in the field of chemical engineering, can solve problems such as pin deformation and mechanical damage, and achieve the effect of strong activator activity and promotion of chemical reactions.
Inactive Publication Date: 2017-02-08
中船西安东仪科工集团有限公司
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Problems solved by technology
[0006] In order to solve the problem that mechanical damage and pin deformation are easily formed when physical methods are mainly used to deoxidize the pins of surface-mounted components in the prior art, the present invention proposes a method for deoxidizing the pins of surface-mounted components. Coating oxidized pins, using chemical reaction process at a certain temperature to remove the oxide layer on the surface of the surface mount component pins, and then repeatedly rinsing with alcohol and performing dehumidification treatment
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Embodiment Construction
[0019] Describe the present invention below in conjunction with specific embodiment:
[0020] In this embodiment, the X-ray detection and comparison experiment is carried out on the quality of solder joints under the same welding conditions of two BGA devices in the same batch and the same state, such as figure 1 As shown, it is the X-ray inspection result of solder joint quality after only dehumidification treatment according to the requirements of the process conditions. The optical inspection of the device is carried out before soldering, and the visual inspection under a 5x magnifying glass shows that the lead color of this group of BGA devices is dark and there is no metal. luster.
[0021] The surface deoxidation treatment and dehumidification treatment process adopted by group B is as follows:
[0022] Step 1: Dip the ALPHA FLUX A88 flux with a brush and apply it on the pins of the BGA device, where the BGA device is placed on a flat object, and apply it gently along t...
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The invention provides a method for deoxidizing pins of surface-mounted components. Soldering flux is utilized to coat the oxidation tube pins, at certain temperature, oxidation layers on the surfaces of the pins of the surface-mounted components are removed through the chemical reaction process, and then the pins are repeatedly rinsed by ethyl alcohol and are dehumidified. The ALPHA FLUX A88 type soldering flux is adopted, through chemical reaction under the specific temperature condition, the surface of metal is corroded by the soldering flux, ion oxides on the surfaces of the pins of the components drop due to corrosion, under the specific temperature condition, an activating agent in the soldering flux is highest in activation, the oxides on the surfaces of the pins can be remarkably promoted to produce chemical reaction, ion pollutants are removed, then, the surface of the metal is conveniently cleaned, and the wetting capacity is promoted.
Description
technical field [0001] The invention relates to the field of chemical engineering, in particular to a method for deoxidizing pins of surface-mounted components, which is a process for removing the oxidation layer of pins of surface-mounted components through a chemical reaction process to enable reliable welding. Background technique [0002] With the rapid development of electronic technology, the civilian and military electronic welding industry has higher and higher requirements for welding quality, and it is necessary to ensure that each solder joint has high reliability. Due to the secondary screening of most types of components, the material preparation cycle and storage reasons are likely to cause oxidation and corrosion on the pins of some components, which can easily cause defects such as virtual soldering and poor solder joint wetting. Its impact on soldering quality is over time. The passage of time and changes in the environment are gradually revealed and must be...
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IPC IPC(8): H01L21/48H01C17/28H01G13/00
CPCH01C17/00H01G13/00H01L21/4892
Inventor 王飞舒斌程武奎刘汉平
Owner 中船西安东仪科工集团有限公司