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Small-aperture high-density drilling method of printed circuit board

A technology of printed circuit board and drilling method, which is applied in the direction of printed circuit, printed circuit manufacturing, electrical components, etc. It can solve the problems of PCB factory production capacity bottleneck and huge investment in drilling rigs, so as to avoid partial holes and broken drills, and reduce broken drills , Improve the effect of drilling rig productivity

Inactive Publication Date: 2009-09-23
NANJING ELEC & ELTEK ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The huge investment in the drilling rig makes the drilling process usually become the capacity bottleneck of the PCB factory.

Method used

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  • Small-aperture high-density drilling method of printed circuit board
  • Small-aperture high-density drilling method of printed circuit board
  • Small-aperture high-density drilling method of printed circuit board

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The small-aperture high-density drilling method of the printed circuit board of the present invention, its specific steps are as follows:

[0024] (1) With Hitachi ND-6Ni210E / ND-6Ne210E CNC drilling machine, the maximum spindle speed is 180krpm. Press the HOME key to return the working surface to the mechanical zero position and then lock the machine. The copper presser foot gasket under the spindle presser foot is made of soft rubber plastic presser foot gasket.

[0025] (2) Open the F2 drill bit ranking interface to set the position of each specification drill bit (0.2mm~6.35mm);

[0026] (3) Open the F3 drill bit parameter interface to set the drill bit parameters of each specification, for example, the Φ0.3mm / Φ0.35mm drill bit parameters are set as follows:

[0027]

Drill specification

Speed ​​S

(thousand revolutions / minute)

Feed speed F

(in / min)

Retraction speed U

(in / min)

Pore ​​limit H

(indivu...

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Abstract

The invention aims at the technical state of the prior printed circuit board drilling method to provide a mechanically drilling method of a high-density and small-aperture multilayer printed circuit board, which improves the drilling machine yield and has good drilling quality by improving drilling parameters. The method mainly comprises the following steps of adjusting zero-position, setting drilling parameters, drilling positioning holes, installing bearing plate, substrate and aluminum sheet, drilling, grinding raw edges, blowing holes and inspecting, wherein the drilling order is set by a leap-frog method with coordinate hole space not smaller than 4 mm; the hole position requirements are converted into a PCB drilling program by CAM, the original hole positions are arranged in sequence, and the drilling sequence is deigned according to the standard of the coordinate hole space not smaller than 4 mm; the pressure foot gasket of a main shaft of a drilling machine is a soft plastic pressure foot gasket; and the bit is a UC-type bit with good chip removal effect, and the total thickness of the drilled substrate is up to 4.5 to 4.8 mm.

Description

Technical field: [0001] The invention provides a high-density, small-diameter multi-layer printed circuit board mechanical drilling method. The method is suitable for processing dense holes with a diameter of less than 0.35 mm, and belongs to the manufacturing technology of the printed circuit board. Background technique: [0002] With the development of modern electronic products towards miniaturization, high integration, and high performance, the density of PCB board holes is getting larger and smaller, the number of stacked boards is decreasing, and the time for drilling a first-hand board is prolonging. It takes more than 1 hour, and some boards even take as long as several hours. The huge investment in drilling rigs makes the drilling process usually a bottleneck in the production capacity of PCB factories. The existing small-aperture high-density drilling method for printed circuit boards, the main steps include: zero position setting, drilling machine parameters, dri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B35/00H05K3/00
Inventor 王俊孙刚
Owner NANJING ELEC & ELTEK ELECTRON
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