Sheets for drilling

A processing procedure and sheet material technology, which is applied in the field of sheet materials used in the drilling process, can solve problems such as incorrect operation of the drilling machine, inability to perform hole processing operations, and weakened close contact.

Inactive Publication Date: 2008-07-16
アイエステックカンパニーリミティッド
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In the drilling process of the printed circuit board, the surface in contact with the copper foil as the bare substrate is the metal layer. When the metal layer of the plate for the drilling process contacts the copper foil as the bare substrate, the gap between the copper foil and the plate The close contact between them is weakened and an air layer is formed in the gap, and a slight slippage occurs due to the inability to absorb the rotational vibration of the drilling machine.
Thi...

Method used

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  • Sheets for drilling

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0047] Manufacturing example 1: Manufacturing of anti-slip layer

[0048] Using Hanwha LLDPE grade 3120 and Samsung comprehensive product EVA120A, a film of 30 μm was extruded at a temperature of 170°C with a blown film machine (Blown Film Extruder).

manufacture example 2

[0049] Manufacturing example 2: Manufacturing of anti-slip layer

[0050] A film with a thickness of 30 μm was extruded at a temperature of 150° C. using Dow Chemical’s AFFINITY grade PL 1840 by a blown film machine (Blown Film Extruder).

manufacture example 3

[0051] Production example 3: Surface treatment of Al foil to achieve anti-slip function

[0052] When Al rolling is performed on one or both sides of an aluminum plate with a thickness of 130 μm and a purity of more than 99%, the surface roughness is improved by embossing the WORK ROLL, and the surface roughness is greater than 0.30. μm aluminum foil.

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Abstract

Disclosed is a sheet for drilling suitable for use as a cover sheet for efficiently realizing a high-quality product upon drilling in the process of fabricating a printed circuit board. The sheet for drilling includes an organic material layer for imparting a lubricating function and a metal layer in contact with the organic material layer, the surface of the metal layer opposite the surface in contact with the organic material layer is controlled to have Theta of a predetermined value or more according to a slippage testing method. Thus, when the sheet is placed on a blank PCB board during the drilling of a printed circuit board, it has increased adhesiveness to the board and therefore an air layer is not formed between the sheet for drilling and the board, thus preventing the slippage of a drill and decreasing the vibration thereof, resulting in improved drill straightness. Wear resistance of the drill is maintained, thus increasing the drill replacement period, thereby realizing high-quality sheets for drilling.

Description

technical field [0001] The invention relates to a sheet material for drilling process, which can be used in the drilling process of printed circuit boards and contributes to high-efficiency manufacturing and high-quality. Background technique [0002] The function of the printed circuit board is to mount and paste electronic parts on it and make the electronic parts electrically connected to each other. The printed circuit board is an important internal part of electrical products. [0003] When manufacturing the above-mentioned printed circuit board, stack multiple layers of bare substrates (blank board) on the backing board (Backup Board), arrange the cover board (Entry Board) on the uppermost layer of the bare substrate, and penetrate the entry and exit board from the top At the same time as hole processing, small holes can be formed on the bare substrate for printed circuit boards by using a drill to form small holes on the front surface of the bare substrate. [0004] ...

Claims

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Application Information

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IPC IPC(8): H05K1/02H05K3/04B32B15/04B32B27/06
CPCB26F1/0092B32B15/04H05K1/03H05K3/04H05K3/38H05K3/44H05K3/46
Inventor 洪富镇蔡承奉
Owner アイエステックカンパニーリミティッド
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