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Production method of asymmetric PCB (printed circuit board)

A technology of PCB circuit board and manufacturing method, which is applied in the direction of multi-layer circuit manufacturing, electrical connection formation of printed components, etc., can solve problems such as pads cannot be touched, cut, soldered, etc., and achieve the goal of improving the pass rate Effect

Active Publication Date: 2013-01-02
广德牧泰莱电路技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rocker will make the installation of surface mount (SMT) electronic components impossible, or cause poor contact between electronic components (including integrated blocks) and printed circuit board solder joints
The adverse effects caused by the rocker also include that some feet cannot be cut or will be cut to the substrate when cutting the feet after the electronic components are installed; some parts of the substrate cannot be touched by the pads during wave soldering, and the solder surface cannot be soldered with tin, etc.

Method used

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  • Production method of asymmetric PCB (printed circuit board)
  • Production method of asymmetric PCB (printed circuit board)
  • Production method of asymmetric PCB (printed circuit board)

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0020] The inner layer of the PCB board includes a copper foil layer and a core board arranged between the copper foil layers for insulation; the core board can be made of FR-4 (epoxy glass cloth laminate) and other materials. Generally speaking, due to the existence of blind buried holes and through holes, the inner layer of the PCB board is asymmetrical up and down. The main reason for the board warping caused by the asymmetric structure of the PCB is that the thermal expansion coefficients and thermal stresses of materials with different structures are different. In order to solve this problem, the present invention processes different layers of the inner layer of the PCB separately. When designing the PCB structure, c...

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Abstract

The invention discloses a production method of an asymmetric PCB (printed circuit board) which comprises a production method of an asymmetric pored PCB and is characterized by comprising the following steps of: classifying the inner layers of the PCB into blind hole layers and non-blind hole layers according to the types of holes in each of the inner layers of the PCB; laminating the blind hole layers and non-blind hole layers respectively to form a corresponding blind hole layer whole and a non-blind hole layer whole; and laminating the blind hole layer whole and the non-blind hole layer whole together.

Description

technical field [0001] The present invention relates to the manufacture of circuit boards, in particular to a method for manufacturing an asymmetrical PCB (Printed Circuit Board, printed circuit board). Background technique [0002] The multilayer board of PCB is a multilayer circuit board with high density wiring. When making the PCB board, in order to meet the wiring requirements, it is necessary to connect the specified circuit layers to each other and not to connect with the unspecified lines at the same time. At this time, a certain number of holes need to be designed. According to the different conductive circuit layers, the holes opened on the PCB are divided into three categories: the holes connecting the outer layer lines with the specified inner layer lines are called blind holes; the holes connecting different specified inner layer lines are called blind holes. Buried holes; the holes connecting all circuit layers are called through holes; among them, in order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K3/40H05K3/46
Inventor 黄孟良刘立
Owner 广德牧泰莱电路技术有限公司