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Entry board for use in drilling small holes

A guide plate, substrate technology, applied in the direction of boring/drilling, drilling/drilling equipment, components of boring machine/drilling machine, etc. question

Inactive Publication Date: 2006-09-20
OHTOMO CHEM INS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This caused the following problems: Using the aluminum plate as a guide plate made the bit slip on the surface of the plate, often causing the bit to break
But the lubricant sheet has poor adhesion to the aluminum substrate, is partially separated from the substrate and its thickness is not uniform, or there are irregularities in the surface of the guide plate facing the blank board during drilling that cause the drill Broken or compromised accuracy of hole placement
In addition, the lubricant sheet has the potential to crack or become uneven in thickness, or to have irregularities in the surface of the guide plate facing the blank during drilling, causing the bit to break or compromising the accuracy of the small hole placement

Method used

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  • Entry board for use in drilling small holes
  • Entry board for use in drilling small holes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A partially saponified product of polyvinyl acetate (trade name: SMR, Shin-Etsu Chemical Co. ., Ltd.) undercoating with a thickness of 1.5 μm. Then from the mixture comprising 70 parts by weight of PEG with an average molecular weight of 9 000, 30 parts by weight of PEG with an average molecular weight of 20 000, and 15 parts by weight of trimethylolpropane (based on the total amount of the two PEGs per 100 parts by weight) A lubricant layer with a thickness of 30 μm was formed on the undercoat layer to produce a guide plate.

Embodiment 2

[0045] A guide plate was prepared in the same manner as in Example 1, except that the thickness of the lubricant layer was 80 μm.

Embodiment 3

[0047] A guide plate was prepared in the same manner as in Example 1, but using vinyl acetate having an average molecular weight of 32,000 comprising 86% by weight of vinyl chloride, 13% by weight of vinyl acetate and 1% by weight of maleic acid. The ester-vinyl chloride-maleic acid copolymer forms an undercoat layer with a thickness of 1.5 µm on one surface of the substrate.

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Abstract

An entry board for use in drilling small holes in boards: the entry board comprises a lubricant layer of a mixture of a polyethylene glycol having an average molecular weight of at least 3000 to less than 10000, a polyethylene glycol having an average molecular weight of at least 10000 and trimethylolpropane formed over at least one surface of an aluminum base board with an undercoat layer of a partially saponified product of polyvinyl acetate provided between the lubricant layer and the base board. The partially saponified polyvinyl acetate has a degree of saponified 15 to 70 mole % and has an average molecular weight of 9000 to 50000. The adhesion of the lubricant layer to the base board is excellent, and the lubricant layer prevents cracking.

Description

[0001] related application [0002] This application is made pursuant to 35 U.S.C. §111(e)(1) claiming the benefit of the filing date of Provisional Application No. 60 / 303,147 filed July 6, 2001 pursuant to 35 U.S.C. §111(b) submitted application. technical field [0003] The present invention relates to a guide plate for drilling small holes, such as through-holes, in blanks of circuit boards, eg for the production of printed circuit boards. Background technique [0004] When producing printed circuit boards, small holes are formed in the blanks used for said printed circuit boards by placing the blanks in superimposed layers on the base plate and placing the guide plate on top of the uppermost blank Superficially, it is known in this state to drill through holes in the guide plate from above while also forming small holes in all blank plates. [0005] Commonly used as a guide plate is an aluminum plate, such as an aluminum plate of AA1100-H18 material, which is mainly us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B26F1/16H05K3/00B23B49/00B23B35/00B23B41/00C10M105/14C10M107/26C10M107/34C10M107/38C10N20/04C10N40/22
CPCB23B35/005H05K3/0047H05K2203/0214H05K2203/0786H05K2203/0152H05K2203/127B23B2250/12Y10T408/03Y10T428/12292Y10T428/12736Y10T428/26Y10T428/31681Y10T428/31692B32B15/08
Inventor 镝木新吾宇田能和高田进河合英夫
Owner OHTOMO CHEM INS CORP
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