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Super-thick carbon oil printing special composite screen printing plate and manufacturing method thereof

A technology of composite screen and production method, applied in printing, printing plate preparation and other directions, can solve the problems of carbon oil leakage short circuit, uneven carbon oil, printing offset oil leakage, etc., to achieve neat and smooth edges of carbon oil, printing quality Guaranteed, graphically smooth results

Pending Publication Date: 2018-03-23
SHENGHUA ELECTRONICS HUIYANG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, in order to reduce the resistance value of conductive carbon oil, customers generally have clear requirements on the thickness of carbon oil. The thicker the carbon oil, the smaller the resistance value, but too thick carbon oil can easily cause oil leakage short circuit and uneven carbon oil At the same time, the existing ordinary screen plate has a large expansion and contraction due to the influence of temperature and humidity, and its printing thickness can only reach about 10um. For PCB boards requiring a thickness of 25um, only two printing methods can be used for operation, but two operations are prone to occur Poor printing offset and oil seepage short circuit, this problem has plagued those skilled in the art for a long time, and it still cannot be effectively solved at present

Method used

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  • Super-thick carbon oil printing special composite screen printing plate and manufacturing method thereof

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Embodiment Construction

[0017] In order to facilitate the understanding of those skilled in the art, the present invention will be further described in detail below in conjunction with specific embodiments.

[0018] see figure 1 , the special composite screen for ultra-thick carbon oil printing according to the present invention is composed of a basic screen 10, a water film layer 20, and a photosensitive paste layer 30. Among them, the basic screen adopts a composite steel mesh, and a water film layer is arranged on the back of the composite steel mesh, and a photosensitive paste layer is coated on the water film layer.

[0019] The manufacturing method of the special-purpose composite screen is as follows: first, select a composite steel mesh with a mesh number of 150-200, fully wet the composite steel mesh with water, then attach a layer of water film on the back of the composite steel mesh, and put it into an oven Baking, the baking is controlled at 50-60 ° C, and baking is done for 20 minutes. ...

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Abstract

The invention provides a super-thick carbon oil printing special composite screen printing plate and a manufacturing method thereof. The manufacturing method of the special composite screen printing plate comprises the following steps of (1) fully wetting a composite steel mesh with water; (2) pasting a layer of aqua film to the back surface of the composite steel mesh and baking the composite steel mesh in a drying oven; (3) tearing off an aqua film protective film, coating the surface of the aqua film with light sensitive paste and then drying the aqua film; and (4) conducting exposure and development to obtain the super-thick carbon oil printing special composite screen printing plate comprising the steel mesh, the aqua film layer and the light sensitive paste layer arranged in sequence. Through the screen printing plate, the problem that a short circuit is caused by carbon oil leakage due to the fact that the middle of a mesh screen is empty in the traditional screen printing plateprinting process is solved; the edge of carbon oil is more regular and smooth; deckle edges are avoided in the printing process; the printing quality is guaranteed better.

Description

technical field [0001] The invention relates to the technical field of circuit board production. Background technique [0002] Conductive carbon oil is widely used in the button parts of electronic equipment due to its low resistance, conductivity and wear resistance. In actual production, in order to reduce the resistance value of conductive carbon oil, customers generally have clear requirements on the thickness of carbon oil. The thicker the carbon oil, the smaller the resistance value, but too thick carbon oil can easily cause oil leakage short circuit and uneven carbon oil At the same time, the existing ordinary screen plate has a large expansion and contraction due to the influence of temperature and humidity, and its printing thickness can only reach about 10um. For PCB boards requiring a thickness of 25um, only two printing methods can be used for operation, but two operations are prone to occur Print offset and poor short circuit caused by oil leakage have plagued ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41C1/14
CPCB41C1/14
Inventor 龙亚波王云峰万磊杨艳兰秦俊
Owner SHENGHUA ELECTRONICS HUIYANG
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