Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Carbon oil printing process for circuit board

A circuit board and carbon oil technology, which is applied in the formation of conductive patterns and other directions, can solve the problems of strong fluidity and uneven thickness of photosensitive ink, high frequency of position use, micro-short circuit scrap, etc., to prevent the diffusion of carbon oil, improve reliability, The effect of not easily deforming the shape

Inactive Publication Date: 2014-06-18
奥士康精密电路(惠州)有限公司
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of carbon oil circuit board production, the current process is to directly screen-print carbon oil on the cured photosensitive ink. Due to the strong fluidity of the photosensitive ink and uneven thickness, it is easy to produce tiny cracks after curing, and the carbon oil penetrates through these cracks. On the circuit under the photosensitive ink, resulting in a micro-short circuit and scrapping
At the same time, carbon oil, as a semiconductor, is mostly used on the button positions of low-voltage products. Because of its high frequency of use, it is prone to short circuit and open circuit problems.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] Embodiment: a kind of circuit board carbon oil printing process, the main process of this process comprises the following steps:

[0019] 1) Clean the circuit board surface. The surface cleaning of the circuit board is the pre-treatment of gold, which is mainly to clean the garbage and foreign matter (copper surface oxidation, grease or dust) on the surface of the circuit board, so as to ensure that the board surface is free of any foreign matter and pollution before silk screen printing. First, select a clean and intact 68T stencil; then wash the stencil with a high-pressure water gun. Wipe off the water droplets on the instant noodles with a cloth, and then put them in the oven to dry. The temperature of the oven is controlled at 45°C±5°C, and the baking time is controlled at 15-20min; Clean the dust roller to ensure that the screen is clean and dust-free.

[0020] 2) Premium film. Tilt the screen at 45°C and put it on the glue rack, spray the screen with a waterin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a carbon oil printing process for a circuit board. The process comprises the following steps of 1, cleaning the board surface of the circuit board; 2, pasting a water film; 3, coating photosensitive glue; 4, exposing; 5, developing; 6, drying. The board surface of the circuit board is coated with a layer of water film with the thickness of 35 [mu]m, and the photosensitive glue is coated on the obverse side and the reverse side before a screen printing plate is exposed, so that the screen printing plate is more uniform and neater, and in addition, the thickness of the screen printing plate is increased, so that the screen printing plate is more stable in shape during printing and is not easy to deform, and the reliability is improved; the printing thickness of carbon oil is increased, so that the problems of short circuit and open circuit at places with high use frequency can be effectively prevented; the thickness of the water film is adjusted from the original 25 [mu]m to 35 [mu]m, and the thickness of the film is increased, so that carbon oil is prevented from being diffused and leaked, the manufacturing yield of the carbon oil is effectively improved, the quality of a PCB (printed circuit board) is improved, the appearance of the board surface is more attractive, scrap of circuit boards is reduced, and the manufacturing cost of the carbon oil is reduced.

Description

technical field [0001] The invention relates to the technical field of circuit board manufacturing, in particular to a carbon oil printing process for circuit boards. Background technique [0002] With the rapid development of the electronics industry, carbon oil printed boards are gradually being used in common electrical appliances and instruments that tend to be multi-functional and miniaturized, such as: TVs, telephones, electronic organs, game consoles, video recorders, etc., its new Technology and new functions are constantly being developed and utilized. Microcomputers, micro-recorders, electronic measuring instruments and SMT electronic fields have also begun to use carbon film printed boards, such as buttons in the printed circuit on the surface of the PCB of electronic appliances. , often need to be contacted but not fixed together. In the process of carbon oil circuit board production, the current process is to directly screen-print carbon oil on the cured photos...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H05K3/12
Inventor 贺波文国堂
Owner 奥士康精密电路(惠州)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products