Hole drilling method with single-side brass plate as back drill cover plate

A drilling method and copper clad plate technology are applied in the direction of boring/drilling, drilling/drilling equipment, electrical components, etc., which can solve the problems of large tolerance and reduced precision, and achieve small copper thickness tolerance, reduce influence, The effect of improving the accuracy of back drilling

Active Publication Date: 2009-01-14
DONGGUAN SHENGYI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The thickness specification of conventional aluminum sheets is 0.18±0.015mm, and its tolerance is relatively large
Moreover, the aluminum s

Method used

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  • Hole drilling method with single-side brass plate as back drill cover plate
  • Hole drilling method with single-side brass plate as back drill cover plate
  • Hole drilling method with single-side brass plate as back drill cover plate

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown, the present invention uses a single-sided copper-clad plate as a drilling method for back-drilling cover plate, comprising the following steps:

[0018] Step 1: Provide a single-sided copper-clad board 4 as a back drill cover; the single-sided copper-clad board 4 includes a base plate 41 and a copper plate 42 disposed on one side of the base plate 41, which is made by etching a double-sided copper-clad plate, The double-sided copper-clad board includes a base plate and copper plates arranged on both sides of the base plate. After etching the copper plate on one side, the copper plate 42 on the other side is used as a dielectric material for high-frequency electronic conduction. In this embodiment Among them, the thickness of the double-sided copper clad plate is 1.0mm, and its copper thickness specification is 0.018±0.003mm.

[001...

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Abstract

The invention relates to a boring method of utilizing a single-side copper clad panel as a back-boring cover plate, which comprises the following procedures: providing the single-side copper clad panel as the back-boring cover plate, the single-side copper clad panel comprises a substrate plate and a copper plate which is positioned on one side of the substrate plate; installing the single-side copper clad panel on a PCB plate, the substrate side of the single-side copper clad panel is upward, the copper side is downward and contacts with the PCB plate; carrying out the back-boring process on the PCB plate. The invention utilizes the single-side copper clad panel as the back-boring cover plate, the thickness is larger and the hardness is larger and consequently the plate is not easily picked up, and the tolerance of the copper thickness of the single-side copper clad panel is less, thereby reducing the affect on the back-boring accuracy. Moreover, the substrate side of the single-side copper clad panel has the role of cleaning the drilling tool, can effectively avoid the depth error cauded by the advanced or delayed communication of high-frequency circuit caused by dust, copper scale and aluminum scale left on the drilling tool, thereby effectively promoting the back-boring accuracy.

Description

technical field [0001] The invention relates to the field of printed circuits, in particular to a drilling method using a single-sided copper clad board as a back drilling cover board. Background technique [0002] In the process of PCB board production, blind holes are needed to realize the electrical connection between the inner circuit layers. Blind holes are often produced by drilling machines. The working principle is that the drill tool is in contact with the PCB board or aluminum sheet (conductor). The frequency electronic conduction forms a loop, and the drilling depth is calculated from this point, so the thickness tolerance of the conductive layer in the cover plate will affect the accuracy of the back drill. [0003] The conventional aluminum sheet thickness specification is 0.18±0.015mm, and its tolerance is relatively large. Moreover, the aluminum sheet is very thin, and it is easy to be sucked away from the PCB surface by the suction of the vacuum cleaner, res...

Claims

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Application Information

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IPC IPC(8): B23B35/00B23B41/00H05K3/00
Inventor 陈笑林石靖
Owner DONGGUAN SHENGYI ELECTRONICS
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