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FPC secondary drilling method

A technology of secondary drilling and hole location, applied in boring/drilling, drilling/drilling equipment, manufacturing tools, etc., can solve problems such as affecting the electrical performance of products, reducing work efficiency, increasing difficulty, etc. The effect of improving product utilization and production efficiency, improving work efficiency and reducing production costs

Inactive Publication Date: 2012-03-07
靖江睿能信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The secondary drilling has a great impact on the subsequent production of the circuit, and also directly affects the electrical performance of the product
[0003] First of all, it takes a certain amount of time and energy to correct the Pin holes, and it often happens that some of the corrected holes cannot be aligned.
[0004] Secondly, when correcting the secondary drilling, due to the shrinkage of the product, most areas on the product can achieve relatively accurate drilling, but there will be serious hole position deviation or even broken holes on a certain corner. Happening
Since the current correction method is to make corrections as a whole, this situation cannot be improved, and this part of the product often has to be discarded, which is extremely unfavorable for cost control
[0005] Finally, because the current correction method is to correct the secondary drilling on the basis of the pin hole correction, the two corrections not only reduce the work efficiency, but also increase the difficulty in realizing accurate drilling

Method used

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Experimental program
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specific Embodiment approach 1

[0021] First of all, in order to realize that the pin holes do not need to be corrected, so as to reduce the actual correction difficulty of the subsequent drilling program, for the design of the pin holes, it should be ensured that the distance between the pin holes is between 5 and 50 mm, preferably 10 to 20 mm between. The previous pin holes were designed at the four corners of the product, specifically at the corners of the four direction holes, such as figure 1 shown. Pin Kongru now figure 2 As shown, the four pin holes are all located at one corner of the product, and the distance between the pin holes is relatively small. When the shrinkage ratio of the product is large, the shrinkage value of the pin hole spacing can also be ensured to be small, or even negligible. It can be realized that the pin hole can be put on well without correction, and the pin hole is not pulled and deformed, so as to achieve the purpose of putting the pin hole on without correction of the p...

specific Embodiment approach 2

[0032] For the pin hole of this specific embodiment, 4 pin holes are arranged on one corner of the product, and the distance between the holes is designed to be 5 mm×5 mm. Since the pin hole spacing is very small, when the entire product shrinks greatly, the shrinkage of the pin hole spacing is also very small, and the lateral shrinkage value of the pin hole spacing is 5×7 = 0.0035mm, the longitudinal shrinkage value is 5×20 = 0.0010 mm, relative to the prior art lateral shrinkage value of 200 mm × 7 = 0.1400mm; the longitudinal shrinkage value is 360×20 = 0.7200 mm, can be ignored. Since the shrinkage value of the pin hole is very small, it can be completely inserted without correcting the pin hole, which directly saves 1 hour compared with the existing technology, and greatly reduces the difficulty of secondary drilling correction later.

specific Embodiment approach 3

[0033] For the pin hole of this specific embodiment, 4 pin holes are arranged on one corner of the product, and the distance between the holes is designed to be 50 mm×50 mm. Since the pin hole spacing is small, when the entire product shrinks greatly, the pin hole spacing shrinkage is also small, and the lateral shrinkage value of the pin hole spacing is 50×7 = 0.0350mm, the longitudinal shrinkage value is 50×20 = 0.1000 mm, relative to the lateral shrinkage value of 200 mm × 7 in the prior art = 0.1400mm; the longitudinal shrinkage value is 360×20 = 0.7200 mm, which is also significantly smaller. Since the shrinkage value of the pin hole is much smaller, it may be possible to completely insert it without correcting the pin hole. Even if it needs to be corrected, the difficulty will be greatly reduced, and it can greatly reduce the difficulty of secondary drilling correction later. .

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Abstract

The invention discloses a secondary drilling method of FPC which includes: arranging a Pin hole site and sheathing the Pin hole as well as the following steps in turn: (1) carrying out emendation on the secondary drilling, namely carrying out single emendation after dividing the area needing emendation, then combining into a complete secondary drilling emendation procedure; (2) carrying out secondary drilling according to the secondary drilling emendation procedure. The secondary drilling method of FPC of the invention can avoid that a product becomes an ill product as the deformation is larger and partial product can not be emended when the method carries out partial emendation on the secondary drilling, thus improving operating factor and efficiency as well as reducing production cost.

Description

technical field [0001] The present invention relates to the drilling of printed circuit boards, in particular to a method for secondary drilling of flexible printed circuit boards (Flexible Printed Circuit, FPC for short). Background technique [0002] One of the technical difficulties of multi-layer FPC is secondary drilling. Secondary drilling has a great impact on the subsequent production of circuits, and also directly affects the electrical performance of the product. Due to the large shrinkage of the FPC, it is necessary to correct the secondary drilling to ensure accurate drilling alignment. At present, the common method of secondary drilling is: first set the pin hole for assembly, and correct it; after the corrected pin hole distance matches the actual pin hole distance of the product, the secondary drilling of the product is carried out. The hole program is corrected as a whole; finally, secondary drilling is carried out according to the correction result. But t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B35/00B23B41/00H05K3/00
Inventor 何小锋盛富松
Owner 靖江睿能信息科技有限公司
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