Recently, as a result of changes in the automotive industry, a large number of electronic systems have been installed in cars. The thickness of the copper foil used for printed wiring boards (PWBs) has tended to increase in response to the large current capacity required for such electronic equipment. Therefore, the nail head generated in the inner layer copper foil was examined with respect to the influence of the thickness of the copper foil on the through-hole quality. In the present study, the size of the nail head generated in the copper foil after drilling a through hole was used as the objective variable. The explaining variables included drill wear, frequency, feed rate, chip load, drill temperature, copper foil thickness, copper foil cutting distance, and number of drill holes. We investigated the relationships between these explaining variables and the objective variable and found that the copper foil cutting distance was a very important parameter in generating nail heads. In addition, we found that the chip load is important for controlling nail head generation.
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ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Electronic and Photonic Packaging Division
ISBN:
0-7918-4277-0
PROCEEDINGS PAPER
Investigation of Drill Hole Quality of Multi-Layer PWBs for High Current Capacity
Eiichi Aoyama,
Eiichi Aoyama
Doshisha University, Kyotanabe, Kyoto, Japan
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Toshiki Hirogaki,
Toshiki Hirogaki
Doshisha University, Kyotanabe, Kyoto, Japan
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Keiji Ogawa,
Keiji Ogawa
University of Shiga Prefecture, Hikone, Shiga, Japan
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Kenichi Mori,
Kenichi Mori
Doshisha University, Kyotanabe, Kyoto, Japan
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Yuusuke Itagaki
Yuusuke Itagaki
Doshisha University, Kyotanabe, Kyoto, Japan
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Eiichi Aoyama
Doshisha University, Kyotanabe, Kyoto, Japan
Toshiki Hirogaki
Doshisha University, Kyotanabe, Kyoto, Japan
Keiji Ogawa
University of Shiga Prefecture, Hikone, Shiga, Japan
Kenichi Mori
Doshisha University, Kyotanabe, Kyoto, Japan
Yuusuke Itagaki
Doshisha University, Kyotanabe, Kyoto, Japan
Paper No:
IPACK2007-33255, pp. 909-915; 7 pages
Published Online:
January 8, 2010
Citation
Aoyama, E, Hirogaki, T, Ogawa, K, Mori, K, & Itagaki, Y. "Investigation of Drill Hole Quality of Multi-Layer PWBs for High Current Capacity." Proceedings of the ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference. ASME 2007 InterPACK Conference, Volume 1. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 909-915. ASME. https://doi.org/10.1115/IPACK2007-33255
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