Processing method of pcb board cover film window

A technology of a PCB board and a processing method, which is applied in the processing field of the PCB board cover film window, can solve the problem of high defective rate

Active Publication Date: 2017-01-25
HANS CNC SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for processing a PCB cover film window, aiming to solve the problem in the prior art that when the cover film window is torn, the remaining cover film is easily brought up, resulting in a high defective rate

Method used

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  • Processing method of pcb board cover film window
  • Processing method of pcb board cover film window
  • Processing method of pcb board cover film window

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] refer to image 3 In the first embodiment of the present invention, a method for processing a window of a PCB cover film is provided. Cutting is performed on the PCB 10 with an existing cover film 20 , and the cutting depth is smaller than the thickness of the cover film 20 . cut to form image 3 As shown in the cutting frame 21, the strip covering film 22 in the cutting frame 21 is oval, and the two ends of the oval strip covering film 22 form two sharp ends 221 relative to the middle part of the strip covering film 22, and the sharp ends The edge of 221 is arc-shaped, and the transition between the sharp end 221 and the middle part 222 of the strip-shaped covering film is smooth.

[0032] After the cutting is completed, pick up any sharp end 221 as a starting point, then tear to the other sharp end 221, and the other sharp end 221 becomes the end point of tearing, so that the oval strip covering film 22 is completely torn off, and the oval The place covered by the o...

Embodiment 2

[0034] refer to Figure 4 , the second embodiment of the present invention provides the processing method of the PCB cover film window, the two sharp ends 221 of the strip cover film 22 in the cutting frame 21 are in the shape of acute angles, and the gap between the two sharp ends 221 and the middle part 222 of the strip cover film transition at an obtuse angle.

[0035] Equally, after the cutting is completed, pick up any sharp end 221 as a starting point, then tear to the other sharp end 221, and the other sharp end 221 becomes the end point of tearing, so that the strip covering film 22 is completely torn off, and the strip The original covering film 22 covers the exposed window. The transition between the two sharp ends 221 and the middle part 222 of the strip-shaped covering film is at an obtuse angle, which also avoids bringing up the remaining covering film 20; at the same time, the sharp ends 221 at an acute angle are convenient to be picked up as the starting point ...

Embodiment 3

[0037] refer to Figure 5 In the third embodiment of the present invention, in the processing method for the window of the cover film 20 of the PCB board 10, the strip cover film 22 in the cutting frame 21 is trapezoidal, and the two ends of the trapezoidal strip cover film 22 are opposite to the middle part 222 of the strip cover film. That is, two sharp ends 221 are formed, the edges of the sharp ends 221 are straight lines, and the transition between the sharp ends 221 and the middle portion 222 of the strip-shaped covering film is also at an obtuse angle. The difference between this embodiment and the second embodiment is only that the acute angle of the sharp end 221 is close to one side, instead of being centered in the second embodiment.

[0038] Equally, after the cutting is completed, pick up any sharp end 221 as a starting point, then tear to the other sharp end 221, and the other sharp end 221 becomes the end point of tearing, so that the strip covering film 22 is c...

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Abstract

The invention relates to the technical field of PCB (printed circuit board) manufacturing and provides a machining method of a PCB (printed circuit board) coating film window. The method comprises the following steps of cutting a PCB coating film to form a strip-shaped cutting frame, wherein the two ends of a strip-shaped coating film in the cutting frame are sharp ends, and each sharp end slowly transits to the middle part of the strip-shaped coating film; taking any sharp end as a start point and taking the other sharp end as an end point to completely tear the strip-shaped coating film from a PCB board to form a window. According to the method, the sharp end is conveniently lifted to serve as a tearing start point; due to the sharp design, the tearing force is low, and the surrounding coating film is not lifted up at the start point and the end point; meanwhile, the two sharp ends slowly transit to the middle part of the strip-shaped coating film, so that slowly transiting places can be smoothly torn up during tearing, the coating film retained nearby is not lifted up, the two end parts and the transiting places are subjected to slow transition, the coating film retained nearby is not lifted up, and the surrounding coating film is not lifted up in a whole tearing process.

Description

technical field [0001] The invention relates to the technical field of PCB board production, and more specifically, relates to a method for processing a PCB cover film window. Background technique [0002] In the production of PCB boards, it is necessary to open a window on the cover film outside the golden finger on the PCB. This kind of window opening is generally adopted by cutting. In this way, after the cutting is completed, the covering film in the cutting frame is torn off to expose the window. Such as figure 1 As shown, in the traditional cutting method, cutting is generally performed on the cover film 20' of the PCB board 10' to form a rectangular frame 21', and then the rectangular film 22' in the rectangular frame 21' is torn off, as shown in the figure It can be seen that since the two ends of the rectangular film 22' have no starting and ending angles with the surrounding covering film, and the rectangular film has four sharp right angles, it is easy to bring ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B26D3/08
Inventor陈国栋吕洪杰翟学涛高云峰
OwnerHANS CNC SCI & TECH