Method and device for controlling expansion and contraction of printed circuit board

A printed circuit board, control technology, applied in the direction of printed circuit, printed circuit manufacturing, computer design circuit, etc., can solve problems such as error-prone, affecting efficiency, complex expansion and contraction process, etc., to improve product quality and production efficiency, and not easy to make mistakes Effect

Active Publication Date: 2019-09-20
SHENZHEN FASTPRINT CIRCUIT TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, due to the wide variety of PCB order structures, the expansion and contraction process is complicated
At present, the expansion and shrinkage pre-loading, extraction an

Method used

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  • Method and device for controlling expansion and contraction of printed circuit board
  • Method and device for controlling expansion and contraction of printed circuit board
  • Method and device for controlling expansion and contraction of printed circuit board

Examples

Experimental program
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Example Embodiment

[0049] Example 1

[0050] In this embodiment, the model of the printed circuit board for expansion and contraction control is 6V29U2DHA0.

[0051] Such as image 3 As shown, the model of the printed circuit board is 6V29U2DHA0, including a first sub-board (L1-L2) and a second sub-board (L3-L6), and the second sub-board (L3-L6) consists of the first core board and the second It is composed of two core boards, the model is 4V29UJ0VA0, the models of the first core board and the second core board are both 2V29UVNMA0, and the first daughter board is composed of the core board 2V29UVNMA0.

[0052] reference figure 2 , Which shows a flow chart of printed circuit board expansion and contraction control, the specific flow is as follows

[0053] Since the number of laminating times of the second sub-board (L3-L6) is 2 greater than that of the first sub-board (L1-L2), the second sub-board (L3-L6) is made preferentially according to the structural parameters of the first sub-board ( One or more...

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Abstract

The invention discloses a method and device for controlling the expansion and contraction of a printed circuit board. The method comprises the following steps: pre-laying of an inner-layer circuit; pre-laying of drill holes in daughter boards; press-fitting expansion-contraction; resistance welding expansion-contraction; and shape expansion-contraction. The method of the invention controls pre-laying of the inner-layer circuit, pre-laying of the drill holes in the daughter boards, press-fitting expansion-contraction, resistance welding expansion-contraction and shape expansion-contraction to overally control expansion-contraction procedures involved in the processing of the printed circuit board by means of controlling interlayer expansion-contraction and integral expansion-contraction; the linking of procedures before and after expansion-contraction is logical and systematic, so mistakes hardly occurs in the expansion-contraction procedures; and factors affecting efficiency can be traced, which helps to correct errors and improve product quality and production efficiency. The method and device for controlling the expansion and contraction of the printed circuit board in the invention are widely applicable to the technical field of printing of inner-layer circuit boards.

Description

technical field [0001] The invention relates to the technical field of printed circuit boards, in particular to a method and device for controlling expansion and contraction of printed circuit boards. Background technique [0002] With the continuous improvement of terminal products, the printed circuit board (PCB) is developing towards high density and thinner, and its dimensional stability and interlayer alignment requirements are becoming increasingly strict. In addition, downstream packaging factories are pursuing production efficiency. Multiple units mount components on the same panel, which further improves the stability requirements of PCB size. At the same time, as the cost of raw materials and production process continues to increase, it is imperative to control the manufacturing cost of film, and the control of PCB dimensional stability also directly affects the control of processing cost, and its impact on production yield is also directly related to scrap cost c...

Claims

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Application Information

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IPC IPC(8): H05K3/00
CPCH05K3/0005
Inventor 廉泽阳夏润鑫谢健鸿李艳国
Owner SHENZHEN FASTPRINT CIRCUIT TECH
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