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Method for deep drilling print circuit board

A technology of printed circuit boards and drilling methods, which is applied in the direction of removing conductive materials by mechanical means, can solve problems affecting drilling accuracy, etc., and achieve the effect of improving control accuracy and controlling influence

Active Publication Date: 2007-12-26
WUS PRINTED CIRCUIT (KUNSHAN) CO LTD
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AI Technical Summary

Problems solved by technology

[0005] (1) The machine can only control the accuracy of the drilling depth calculated from the contact point on the metal surface, but cannot change the drilling depth each time as the thickness of the plate changes so as to achieve the required work required for mass production of the plate The depth control accuracy of ±1mil.
[0006] (2), because there is a difference in the combination between the aluminum cover and the production plate when using the aluminum cover. This will also affect the accuracy of the drilling.
[0007] Due to the above defects, the depth accuracy of non-through holes obtained by deep drilling of printed circuit boards can generally be controlled above ±2.5mil

Method used

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  • Method for deep drilling print circuit board
  • Method for deep drilling print circuit board
  • Method for deep drilling print circuit board

Examples

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Embodiment

[0023] Example: As shown in Figure 3, the thickness of the laminated printed circuit board is uneven, but it has certain rules. Generally, the thickness of the board will be thick in the middle and thin on both sides, and the change is relatively uniform .

[0024] Suppose the customer asks us to control the depth between Lm+1 and Lm+2 layers, then we name Lm+1 layer as the target layer, Lm+2 layer as the layer above the target layer, and Lm layer as the layer below the target layer. As shown in Figure 3, if the thickness uniformity of the produced printed circuit board is poor and we still use the old method when drilling deep, even if drilling at the same depth, it is easy to drill the target layer and cause scrapping, or use The length of residual hole copper calculated from layer Lm+1 to layer Ln is different. Therefore, it is necessary to let the machine automatically detect the surface of the board, calculate the height of the board at this time, and automatically set th...

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Abstract

The method comprises: setting the plane contacting with the PCB as a standard plane; recording the actual location height Hn of each point on PCB, and saving it into the storage software of the machine; selecting a target layer, setting a standard drilling depth D1 and standard plate thickness H1; the drilling depths of other points are Dn=D1*Hn / H1+ compensation value; according to the drilling depth Dn of each points, re-setting the parameters in the drilling program, and renewing each parameter in the storage software in machine; finally, according to Dn value, modifying the program-controlled instruction.

Description

technical field [0001] The invention relates to the technical field of manufacturing printed circuit boards (PCB boards), in particular to a method for deep drilling on printed circuit boards. Background technique [0002] Printed circuit board depth drilling is to use mechanical drilling to drill a through hole into a hole consisting of a part of the through hole and a part of the non-through hole. The depth of the non-through hole is usually controlled between two inner layers and the depth accuracy Control within ±1mil (thousandth of an inch). (As shown in Figure 1, L1...Ln: represent the first to n layers) [0003] The existing deep drilling method for printed circuit boards is to use the chuck conductive feedback system, as shown in Figure 2, using the current deep drilling machine, add a conductive aluminum cover plate 1 on the surface of the production board, drill pin 2. The tail end passes through the conductive switch 3, the conductive chuck 4 is connected to the ...

Claims

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Application Information

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IPC IPC(8): H05K3/04
Inventor 徐国成符政新
Owner WUS PRINTED CIRCUIT (KUNSHAN) CO LTD
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