Aluminum sheet for improving accuracy of hole site of drill hole and manufacturing method

A manufacturing method and precision technology, applied in the field of PCB board manufacturing, can solve problems such as drill tip slippage and precision error, achieve high drilling precision, better effect, and avoid the effect of decreasing hole position accuracy

Inactive Publication Date: 2013-04-24
SHENZHEN NEWCCESS IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Regardless of whether it is an aluminum sheet with high hardness and high strength or a composite aluminum sheet, the thickness of the aluminum sheet normally used for drilling printed circuit boards is within the range of 0.05mm-0.20mm, and the roughness Rz of the upper and lower surfaces is between 0.2um-0.5um. When used for drilling, the high-speed rotating drill has a certain small range of swing. When the drill tip touches the aluminum sheet, the smooth and high-hardness metal surface causes the drill tip to slip and deviate from the design. The fixed drilling position will cause a certain degree of accuracy error

Method used

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  • Aluminum sheet for improving accuracy of hole site of drill hole and manufacturing method
  • Aluminum sheet for improving accuracy of hole site of drill hole and manufacturing method
  • Aluminum sheet for improving accuracy of hole site of drill hole and manufacturing method

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0017] figure 1 It is a structural schematic diagram of an aluminum sheet used to improve the accuracy of drilling holes in the present invention. See figure 1 , wherein, the aluminum sheet is an aluminum sheet produced and formed into a thickness range of 0.05mm-0.20mm through conventional aluminum sheet processing techniques such as melting, standing, filtering, or casting and rolling, one side of which is a rough surface 1, and the other side is a smooth surface 2 .

[0018] When processing the PCB board, if the surface of the aluminum sheet is too smooth, the high-speed rotating d...

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Abstract

The invention discloses an aluminum sheet for improving accuracy of a hole site of a drill hole and a manufacturing method of the aluminum sheet. The method includes that an upper surface of the aluminum sheet is a rough surface, a lower surface of the aluminum sheet is a smooth surface, the roughness of the upper surface of the aluminum sheet is controlled within 1um to 20um, thereby when the aluminum sheet serves as a cover plate, a drill pin can be excellently prevented from momently slipping by the aid of fine concave pits on the rough upper surface of the aluminum sheet, simultaneously a certain locating effect when the drill pin drills down can be achieved, the deviation between an actual drill hole position and a set drill hole position is reduced, the accuracy of the hole site of the drill hole is improved, and a circuit board with good qualities can be produced.

Description

technical field [0001] The invention relates to the field of PCB board manufacturing, in particular to an aluminum sheet for improving the accuracy of drilling holes and a manufacturing method. Background technique [0002] Printed circuit boards (referred to as PCBs) are divided into rigid printed circuit boards, flexible printed circuit boards and rigid-flexible boards. Cover plates for drilling holes in printed circuit boards generally use aluminum sheets, coated aluminum sheets (for example, the invention patents with patent numbers 200810187336. utility model patent), etc., aluminum sheet has low cost, high hardness, and less drilling burrs, and is widely used on rigid printed circuit boards. However, it is not suitable for flexible printing due to its high hardness, poor elasticity, and smooth surface. Circuit board drilling; the high cost of coated aluminum sheets is only used for high-end printed circuit boards; phenolic resin boards are low in cost, good in elastic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B26F1/24B26D7/00
Inventor 张伦强杨柳
Owner SHENZHEN NEWCCESS IND
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