The high density LSI packages such as BGA is being utilized in the car electronics and communications infrastructure products. These products require a high-speed and reliable inspection technique for their solder joints. In this paper, an automated X-ray inspection system for BGA mounted substrate based on oblique computed tomography are proposed. Automated inspection consisted of OCT capturing, position adjustment, bump extraction, character extraction and judgment. Five characteristic features related to the bump shape are introduced. And by combining the characteristic features using artificial neural network, the condition of solder bump was judged. In the experiments, these techniques were evaluated using actual BGA mounted substrate. As a result, the correct rate of judgment reached 99.7%, which shows the clear evidence that proposed techniques may be useful in the practice.
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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
Development of an Automated Solder Inspection System With Neural Network Using Oblique Computed Tomography
Atsushi Teramoto,
Atsushi Teramoto
Nagoya Electric Works Company, Ltd., Kuwana, Mie, Japan
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Takayuki Murakoshi,
Takayuki Murakoshi
Nagoya Electric Works Company, Ltd., Kuwana, Mie, Japan
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Masatoshi Tsuzaka,
Masatoshi Tsuzaka
Nagoya University, Nagoya, Aichi, Japan
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Hiroshi Fujita
Hiroshi Fujita
Gifu University, Gifu, Gifu, Japan
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Atsushi Teramoto
Nagoya Electric Works Company, Ltd., Kuwana, Mie, Japan
Takayuki Murakoshi
Nagoya Electric Works Company, Ltd., Kuwana, Mie, Japan
Masatoshi Tsuzaka
Nagoya University, Nagoya, Aichi, Japan
Hiroshi Fujita
Gifu University, Gifu, Gifu, Japan
Paper No:
IPACK2007-33017, pp. 453-457; 5 pages
Published Online:
January 8, 2010
Citation
Teramoto, A, Murakoshi, T, Tsuzaka, M, & Fujita, H. "Development of an Automated Solder Inspection System With Neural Network Using Oblique Computed Tomography." 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. 453-457. ASME. https://doi.org/10.1115/IPACK2007-33017
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