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Paper-based lubricating cover board for drilling printed circuit boards and manufacturing method thereof

A technology for printed circuit boards and manufacturing methods, which is applied in the fields of chemical instruments and methods, paper/cardboard layered products, metal processing, etc., and can solve the problems such as excessive drilling of printed circuit boards with thick backplanes, and achieve the solution of excessive drilling draping , good needle grip and low hardness

Inactive Publication Date: 2018-11-13
SHENZHEN NEWCCESS IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a paper-based lubricating cover for printed circuit board drilling and its manufacturing method, aiming to solve the problem of the existing paper-based lubricating cover for printed circuit board drilling. The board is easy to cause the problem that the drilling of the thick backplane printed circuit board exceeds the standard

Method used

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  • Paper-based lubricating cover board for drilling printed circuit boards and manufacturing method thereof
  • Paper-based lubricating cover board for drilling printed circuit boards and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0040] (1) Use a grammage of 130g / m 2 For single-sided photobleached wood pulp paper with a thickness of 0.2mm and water absorption <0.1mm / 10min, the smooth surface is coated with 20um thick UV resin after UV curing, and then the non-glossy surface is coated with 20um thick lubricating resin. After drying, press Cut to size to get the finished product.

[0041] Cover the finished product on the thick backplane PCB and drill holes with a drill pin with a diameter of 0.25mm, taking 30,000 holes as the test standard.

[0042] Results: The drape of the upper orifice is less than 25.4um, the hole position accuracy is 2.143, and there is no broken needle.

[0043] (2) Use a grammage of 130g / m 2 Matte bleached wood pulp paper with a thickness of 0.25mm and a water absorption of 80mm / 10min, impregnated with phenolic resin, dried, and pressed to obtain a finished phenolic cover plate.

[0044] Cover the finished phenolic cover plate on the thick backplane PCB and use a 0.25mm diamet...

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Abstract

The invention discloses a paper-based lubricating cover board for drilling printed circuit boards and a manufacturing method thereof, wherein the cover board comprises a cardboard layer, and a bondingresin layer arranged on the lower side of the cardboard layer and used for adhering to the printed circuit board to be drilled; a lubricating layer for cooling and cleaning a drill pin is arranged onthe upper side of the cardboard layer. The problem that a conventional paper-based lubricating cover board used for drilling printed circuit boards can easily cause standard exceeding of drilling burrs of thick-backed printed circuit boards is solved.

Description

technical field [0001] The invention relates to the technical field of printed circuit boards, in particular to a paper-based lubricating cover plate for drilling printed circuit boards and a manufacturing method thereof. Background technique [0002] At present, paper-based lubricating cover plates for drilling printed circuit boards are generally made of aluminum plates, wood fiber boards, and phenolic resin plates. All of them are warped. Therefore, when the above-mentioned changes are used for back drilling of thick printed circuit boards, the cover plate and the printed circuit board cannot be completely bonded, resulting in the holes in some areas after drilling exceeding the standard, and the drill pins are easy to break. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a paper-based lubricatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B29/00B26F1/16B26D7/00
CPCB32B29/002B26D7/00B26F1/16
Inventor 唐甲林张伦强罗小阳刘飞
Owner SHENZHEN NEWCCESS IND
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