Metal solder pad welding method

A welding method and metal pad technology, applied in the field of metal pad welding, can solve the problems that the welding temperature affects the reliability of product quality, the reliability of welding products is low, and the ideal efficiency cannot be achieved, so as to solve the problem of difficult alignment accuracy control, The effect of eliminating hidden dangers of quality and reducing the influence of uncontrollable human factors

Inactive Publication Date: 2009-02-18
BYD CO LTD
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Problems solved by technology

[0026] a. The increase of welding temperature directly affects the product quality and reliability;
[0027] b. None of the above solu

Method used

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  • Metal solder pad welding method
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Embodiment Construction

[0053] The features and advantages of the present invention will be described in detail with reference to the accompanying drawings.

[0054] Please refer to figure 1 , the welding process of the present embodiment is implemented according to the following steps:

[0055] 1. Select the tip of the soldering iron

[0056] This embodiment adopts a reheating soldering iron with adjustable temperature and extremely fast reheating speed. The selection of the tip of the soldering iron depends on the length of the metal pad used in the soldering, as shown in the following table:

[0057] a. The horseshoe-shaped soldering iron is about 1.1-1.5:1 in ratio of the diameter of the outer circle of the soldering iron head to the size of the metal pad;

[0058] b. The ratio of the oblique soldering iron tip to the pad contact position and the metal pad is about 0.4~1.1:1;

[0059] c. The ratio of the length of the outer end of the soldering iron tip to the size of the metal pad is about ...

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Abstract

The invention discloses a welding method for a metal bonding pad, which comprises the following steps: A1. heating up welding brand iron to the welding temperature of between 335 and 345 DEG C; B1. adhering a double-faced adhesive tape to a conductive welding sheet of a weldment to be welded; C1. contacting the weldment to be welded which is adhered with a double-faced adhesive tape with a metal bonding pad for alignment and positioning; and F1. dragging welding from a far place to a near place relative to an operator, wherein the speed of the dragging welding is between 3 and 5 centimeters per second, and the frequency of the dragging welding is between 2 and 3 times. The welding method in the invention eliminates the disadvantage that the prior process needs to improve the welding temperature and increase the welding time to improve the welding process, solves the bottleneck problem that the prior process needs manual operation to achieve the alignment of larger area between the weldment and the bonding pad, and guarantees the production efficiency and the reliability of products. Furthermore, the method has the advantages of simple technological operation, high reliability of welding operation, and the improvement of welding quality.

Description

【Technical field】 [0001] The invention relates to a metal pad welding method. 【Background technique】 [0002] Welding is a connection method between materials in modern industrial production. Its principle is to achieve the purpose of connection by adding wetting between materials. [0003] Usually in industrial production, commonly used welding methods are mainly divided into the following types: [0004] 1. Reflow soldering 2. Wave soldering 3. Manual soldering. [0005] Among them, manual soldering works in various forms in the industrial production process, and various parameters and process standards are different; moreover, because of the introduction of lead-free technology, the content of tin wire materials has changed greatly, and the activity of soldering materials has decreased. Even if the lead-free (Pb-Free) soldering temperature is about 30°C higher than the tin / lead (Sn / Pb) soldering temperature on average, its solder joint strength (Joint Strength) is far l...

Claims

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Application Information

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IPC IPC(8): B23K1/00B23K1/20B23K3/02
Inventor 彭国文李作坤
Owner BYD CO LTD
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