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Partial double-sided-reinforcement flexible board and manufacturing method thereof

A technology of flexible boards and reinforcing boards, which is applied in the fields of printed circuit manufacturing, electrical components, printed circuits, etc., can solve problems such as white spots, and achieve the effects of simple process, enhanced bonding force, and prevention of white spot defects

Inactive Publication Date: 2014-06-11
GUANGZHOU FASTPRINT CIRCUIT TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the pressure distribution board adopts the copper clad laminate of FR-4 material with low cost. For the case where the pressure distribution board is directly in contact with the window opening of the cover film, the cavity formed in the window opening area of ​​the cover film will cause the window opening of the cover film during lamination. White spot defects appear on the FR-4 reinforcement on the opposite side

Method used

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  • Partial double-sided-reinforcement flexible board and manufacturing method thereof
  • Partial double-sided-reinforcement flexible board and manufacturing method thereof
  • Partial double-sided-reinforcement flexible board and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] (1) Fabrication of flexible board circuit: the flexible board is made through the processes of pasting dry film, exposure, development, and etching to complete the production of flexible board circuit;

[0050] The material of the flexible board is composed of PI base and Cu, or composed of PI base, AD and Cu. For the total thickness of the flexible board is about 0.12mm or less, it is necessary to paste FR-4 material strip board. Stick it with red tape. The optimal width of the red tape is about 1cm, the thickness of the strip is 0.3-1.0mm, the width is about 10-15cm, and the length is 15-20inch.

[0051] (2) Manufacture of window opening of cover film: window opening operation of cover film;

[0052] The window opening operation adopts laser cutting or auxiliary material cutting. The specific operating parameters are: under the condition of 150mm / s, 80HZ, the cutting energy is 5-8w, and the number of cutting is 1-2 times.

[0053] (3) Fabrication of flexible board ...

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PUM

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Abstract

The invention discloses a partial double-sided-reinforcement flexible board and a manufacturing method of the partial double-sided-reinforcement flexible board. The method includes the following steps that a flexible board circuit is manufactured, a covering film is manufactured in a windowing mode, a first combined flexible board is manufactured, a reinforcement board is manufactured, a second combined flexible board is manufactured, a combined voltage distribution board is manufactured, and forming is performed. The method can be applied to windowing of covering films of any thickness, a cavity in the windowing position of the covering film is filled with a PI film after being pressed, the white spot defect of the reinforcement board (FR-4) can be effectively prevented, and the combining force between the reinforcement board and the flexible board is greatly increased.

Description

technical field [0001] The invention relates to the technical field of printed circuit boards, in particular to a partially double-sided reinforced flexible board and a preparation method thereof. Background technique [0002] With the continuous development of electronic products in the direction of multi-functionality, miniaturization, light weight, and high density, flexible circuit boards that are light, thin, short, and bendable are becoming more and more important in the field of printed boards. In the field of flexible printed circuit boards, the reinforcement board (Stiffener, also known as the reinforcement board) is a hard material for welding parts in the local area of ​​the flexible board or for easy installation and pressing. Its function is to strengthen the mechanical strength of the flexible board. , to facilitate the connection of printed boards, fixing, inserting components and other functions. Therefore, the stiffener plays an irreplaceable role in the fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K3/00
Inventor 李冲莫欣满陈蓓
Owner GUANGZHOU FASTPRINT CIRCUIT TECH