Coated aluminum entry board for PCB and preparation method of coated aluminum entry board

A technology of aluminum cover and gluing, applied in coatings, polyether coatings, polyurea/polyurethane coatings, etc., can solve the problems of increasing drilling cost, decreasing hole position accuracy, increasing needle breakage rate, etc., and reducing drilling cost, reduce needle breakage rate, and improve the effect of hole position accuracy

Active Publication Date: 2016-06-22
SHENZHEN NEWCCESS IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a glued aluminum cover plate for PCB and its preparation method, which aims to solve the problem of wire wrapping in the existing glued aluminum cover plate, resulting in decreased hole position accuracy, broken The problem of increasing the drilling cost due to the increase of needle rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add nano-scale aluminum oxide powder with a solid content of 10% by weight to the original glue solution and stir evenly, and evenly coat the glue solution on the aluminum sheet. The thickness of the coating is equal to the thickness of the glue layer without adding aluminum oxide powder. Comparing the drilling results, adding Al2O3 powder is smaller than not adding Al2O3 powder, and the needle breakage rate is equivalent.

[0023] Add nano-scale silica powder with a solid content of 10% by weight to the original glue solution and stir evenly, and apply the glue solution evenly on the aluminum sheet. The thickness of the coating is equal to the thickness of the glue layer without adding silicon dioxide powder. Comparing the drilling results, adding silica is smaller than not adding silica, and the needle breakage rate is equivalent.

Embodiment 2

[0025] Add nano-scale aluminum oxide powder with a solid content of 20% by weight to the original glue solution and stir evenly, and apply the glue solution evenly on the aluminum sheet. The thickness of the coating is equal to the thickness of the glue layer without adding aluminum oxide powder. Comparing the drilling results, the wire winding with Al2O3 powder is smaller than that without Al2O3 powder, and the broken needle rate with Al2O3 powder is lower than that without Al2O3 powder.

[0026] Add nano-scale silica powder with a solid content of 20% to the original glue solution and stir evenly, and evenly coat the glue solution on the aluminum sheet. The thickness of the coating is equal to the thickness of the glue layer without adding silicon dioxide powder. Comparing the drilling results, adding silica powder is smaller than not adding silica powder, and the broken needle rate is lower than adding silica powder than not adding silica powder.

Embodiment 3

[0028] Add nano-scale aluminum oxide powder with a solid content of 30% by weight to the original glue solution and stir evenly, and apply the glue solution evenly on the aluminum sheet. The thickness of the coating is equal to the thickness of the glue layer without adding aluminum oxide powder. Comparing the drilling results, the one with Al2O3 powder has no wire wrapping, the one without Al2O3 powder has wire wrapping, the broken needle rate of adding Al2O3 powder is 0.1-0.3%, and that of not adding Al2O3 powder is 0.1-0.3%. The broken needle rate is 0.5-0.8%.

[0029] Add nano-scale silica powder with a solid content of 30% by weight to the original glue solution and stir evenly, and apply the glue solution evenly on the aluminum sheet. The thickness of the coating is equal to the thickness of the glue layer without adding silicon dioxide powder. Comparing the drilling results, the one with silica powder has no wire wrapping, the one without silica powder has wrapping wire...

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PUM

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Abstract

The invention discloses a coated aluminum entry board for a PCB and a preparation method of the coated aluminum entry board. The coated aluminum entry board is prepared by adding certain solid filler to an original glue solution, stirring the solution uniformly and applying the solution to an aluminum sheet. Certain amount of the solid filler is added to the original glue solution, and then the solution is applied to the aluminum sheet, so that the prepared coated aluminum entry board not only can have the function of removing chip grooves of drilling bits, but also reduces wire winding effectively, improves the hole location precision, reduces the bit breaking rate and reduces the drilling cost.

Description

technical field [0001] The invention relates to the field of PCB cover plates, in particular to a glue-coated aluminum cover plate for PCBs and a preparation method thereof. Background technique [0002] Glue-coated aluminum cover plates used for drilling printed circuit boards have wire wrapping problems of varying severity. Wire wrapping can cause a decrease in hole position accuracy, an increase in needle breakage rate, and increase drilling costs. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a glued aluminum cover plate for PCB and its preparation method, which aims to solve the problem of wire wrapping in the existing glued aluminum cover plate, resulting in decreased hole position accuracy, broken The needle rate increases and the drilling cost increases. [0005] Technical scheme of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D171/02C09D129/04C09D175/04C09D7/12
CPCC08K2201/011C08L2205/025C08L2205/035C09D7/61C09D129/04C09D171/02C09D175/04C08L71/02C08L29/04C08L75/04C08K2003/2227C08K3/36C08K2003/2241C08K2003/265
Inventor 唐甲林秦先志罗小阳
Owner SHENZHEN NEWCCESS IND
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