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Manufacturing technology for improving resistance precision of conductive carbon oil printed circuit board

A technology of printed circuit board and conductive carbon oil, which is applied in directions including printed resistors, printed circuit manufacturing, printed circuits, etc. High resistance value accuracy, fast processing speed, and the effect of reducing influence

Active Publication Date: 2016-02-03
HUIZHOU KING BROTHER CIRCUIT TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current production method of conductive carbon oil printed circuit boards is to print and bake conductive carbon oil after the outer layer of circuit is completed. The conductive carbon oil printed area is usually not covered with any protective layer, and the result is that the resistance accuracy The resistance value of low-conductivity carbon oil changes greatly when it is directly exposed to the air

Method used

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  • Manufacturing technology for improving resistance precision of conductive carbon oil printed circuit board
  • Manufacturing technology for improving resistance precision of conductive carbon oil printed circuit board

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Embodiment 1

[0029] Such as figure 1 As shown, the present invention discloses a manufacturing process for improving the resistance accuracy of a printed circuit board with conductive carbon oil. Printing conductive carbon oil on one side of the circuit board includes the following steps:

[0030] The first step is the printing of conductive carbon oil. After the circuit board completes the pre-production process of the conventional outer layer circuit, according to the resistance value and line width, the printing size of the conductive carbon oil is designed and printed on the circuit board to form a conductive carbon oil resistance. Both ends of the conductive carbon oil resistor are circuit board lines.

[0031] Such as figure 2 As shown, the printed size of the conductive carbon oil is calculated according to the following relationship: R=αL / W, wherein, R represents the resistance of the conductive carbon oil, α is the resistance value of the conductive carbon oil when the effective...

Embodiment 2

[0035] Such as figure 1 As shown, the present invention discloses a manufacturing process for improving the resistance precision of a printed circuit board with conductive carbon oil. Printing conductive carbon oil on both sides of the circuit board includes the following steps:

[0036] The first step is the printing of conductive carbon oil. After the circuit board completes the pre-production process of the conventional outer layer circuit, according to the resistance value and line width, the printing size of the conductive carbon oil is designed and printed on the circuit board to form a conductive carbon oil resistance. Both ends of the conductive carbon oil resistor are circuit board lines.

[0037] Such as figure 2 As shown, the printed size of the conductive carbon oil is calculated according to the following relationship: R=αL / W, wherein R represents the resistance of the conductive carbon oil, α is the resistance value of the conductive carbon oil when the effecti...

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Abstract

The invention discloses a manufacturing technology for improving resistance precision of a conductive carbon oil printed circuit board. The manufacturing technology comprises the working procedures of conductive carbon oil printing, reflow soldering processing and solder resist manufacturing and the like; the single surface or double surfaces of the conductive carbon oil are printed among the circuits of the circuit board to form the conductive carbon oil resistance; the good stability and higher precision of the conductive carbon oil are ensured by repeated rapid temperature rising processing; and the stability of the resistance is improved by performing the solder resist printing on the circuit board through a solder resist ink without adding a diluent. The manufacturing technology for improving resistance precision of the conductive carbon oil printed circuit board has the characteristics of high resistance precision, high product stability, high product yield, high production efficiency and low cost.

Description

technical field [0001] The invention relates to the field of PCB circuit board production, in particular to a production process for improving the resistance precision of a conductive carbon oil printed circuit board. Background technique [0002] Conductive carbon oil is a kind of printing ink with good electrical conductivity, which is usually used in keyboard circuit, printed circuit board jumper and resistance production, etc. When conductive carbon oil is printed on the circuit board as a resistor, due to the printing process and the influence of the environment, its resistance value accuracy is usually not high, and it is difficult to work normally as a precise resistor on the circuit board. [0003] Although the high-precision resistors of printed circuit boards have been gradually replaced by embedded resistor materials, the cost of embedded resistor materials is expensive and the manufacturing process is complicated. Only a few manufacturers can make printed circuit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K1/16
CPCH05K1/167H05K2203/043
Inventor 吴军权刘敏武守坤陈春卫雄林映生
Owner HUIZHOU KING BROTHER CIRCUIT TECH
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