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Flexible circuit board for display panel, assembly thereof, and soldering method thereof

A technology for flexible circuit boards and display panels, which is applied to printed circuit components, electrical components to assemble printed circuits, and electrical components. Effect of reducing the risk of disconnection

Inactive Publication Date: 2019-11-08
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] An object of the present invention is to provide a flexible circuit board assembly for a display panel, which can solve the problem in the prior art that there is a risk of open circuit due to insufficient tin emerging from the tin hole during the thermocompression welding process

Method used

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  • Flexible circuit board for display panel, assembly thereof, and soldering method thereof
  • Flexible circuit board for display panel, assembly thereof, and soldering method thereof
  • Flexible circuit board for display panel, assembly thereof, and soldering method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] In the prior art, the backlight pins are connected to the flexible circuit board (Flexible Printed Circuit, flexible circuit board) pads, and a flat high-temperature thermocompression welding head is pressed to the surface of the flexible circuit board to make the tin on the flexible circuit board Melt, and connect the backlight module and the flexible circuit board through two tin holes on a straight line on the flexible circuit board.

[0034] During the welding process, due to the material, the unevenness of the thermal pressure head, foreign objects and other reasons, the tin coming out of the two tin holes is insufficient, there is a risk of open circuit, the welding effect cannot meet the quality requirements, and the defective rate of the product is increased. The rate directly affects the yield rate of the production line, and rework consumes manpower and material resources, which increases the manufacturing cost. In order to solve this problem, this embodiment ...

Embodiment 2

[0041] This embodiment also provides a welding method for the flexible circuit board assembly for the display panel involved in Embodiment 1, including the following steps:

[0042] Step S1: providing a backlight module 1 and a flexible circuit board 2;

[0043] The backlight module 1 includes a backlight module body 11 and pins 12 provided on the backlight module body 11; the flexible circuit board 2 includes a flexible circuit board body 21, and the flexible circuit board body 21 is provided with a plurality of solder joints arranged in parallel and spaced apart. The pad 22 is provided with a tin slot 23 on the pad 22 .

[0044] The tin slot 23 provided in this embodiment is to connect two tin slots on a straight line on the flexible circuit board in the prior art to form the tin slot 23. The tin slot 23 is in a rectangular configuration. The diameter of the solder hole in the technology ranges from 0.2 mm to 0.3 mm. The width L3 of the solder slot in this embodiment ranges...

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Abstract

The invention provides a flexible circuit board for a display panel, an assembly thereof, and a soldering method thereof. The flexible circuit board assembly comprises a flexible circuit board and a backlight module electrically connected with the flexible circuit board by soldering, wherein the flexible circuit board includes a flexible circuit board body; a pad is arranged on the flexible circuit board body; a tin passing groove is arranged in the pad; the backlight module comprises a backlight module body and a pin disposed on the backlight module body, and the pin is electrically connectedto the pad by tin melted from the tin passing groove. The tin coming-out area in the case of hot pressure welding is increased, the open circuit risk is thus reduced, the welding quality requirementsare met, the product yield is increased, manpower and material resources are reduced, and the manufacturing cost is further reduced.

Description

technical field [0001] The invention relates to the technical field of display panels, in particular to a flexible circuit board for a display panel, its components and its welding method. Background technique [0002] At present, there are two main welding methods for display module backlight modules in the mobile phone industry: drag welding and pulse hot-press welding. Drag welding is mainly done by manual operation, the uniformity of the welding appearance is poor, and it wastes manpower; pulse hot-press welding can be called hot-press welding, and the work is done by equipment, which not only improves the welding yield and consistency, but also realizes welding Work station automation. [0003] In the prior art, the backlight pins are connected to FPC (Flexible Printed Circuit, flexible circuit board) pads, and a flat high-temperature thermocompression welding head is pressed to the surface of the flexible circuit board to melt the tin on the flexible circuit board. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K1/11H05K3/34
CPCH05K1/111H05K3/3421
Inventor 汪家国
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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