High-performance, simple cooling structures for optical disc drives compatible with the Blu-ray disc (BD) were developed using unsteady numerical flow simulation based on the Cartesian grid method. In the new structure, an additional hole in the tray outside of the disc induced a secondary upward flow, which is caused by a pressure difference and rotating-disc flow. The secondary flow decreases the ambient air-temperature of the laser diode below the hole, and furthermore it increases the velocity around the laser diode and enhances the heat transfer rate. The experimental results indicate that the cooling effect of the laser diode increases, and the disc vibration is not influenced by the additional hole in the tray. The cooling structures are applied to the so-called super-multi BD drive, which achieved 4X high-speed recording for the first time in the industry.
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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:
0-7918-4278-9
PROCEEDINGS PAPER
Development of Cooling Structures for Blu-Ray Disc Compatible Optical Disc Drives Using Computational Fluid Dynamics Based on Cartesian Grid Method
Nobuyuki Isoshima,
Nobuyuki Isoshima
Hitachi Ltd., Hitachinaka, Ibaraki, Japan
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Takayuki Fujimoto,
Takayuki Fujimoto
Hitachi Ltd., Hitachinaka, Ibaraki, Japan
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Yukinobu Abe,
Yukinobu Abe
Hitachi Ltd., Hitachinaka, Ibaraki, Japan
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Masatoshi Watanabe,
Masatoshi Watanabe
Hitachi Ltd., Hitachinaka, Ibaraki, Japan
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Yoshiaki Yamauchi,
Yoshiaki Yamauchi
Hitachi Ltd., Hitachinaka, Ibaraki, Japan
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Ikuo Nishida
Ikuo Nishida
Hitachi-LG Data Storage, Inc., Tokyo, Japan
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Nobuyuki Isoshima
Hitachi Ltd., Hitachinaka, Ibaraki, Japan
Takayuki Fujimoto
Hitachi Ltd., Hitachinaka, Ibaraki, Japan
Yukinobu Abe
Hitachi Ltd., Hitachinaka, Ibaraki, Japan
Masatoshi Watanabe
Hitachi Ltd., Hitachinaka, Ibaraki, Japan
Yoshiaki Yamauchi
Hitachi Ltd., Hitachinaka, Ibaraki, Japan
Ikuo Nishida
Hitachi-LG Data Storage, Inc., Tokyo, Japan
Paper No:
IPACK2007-33248, pp. 895-907; 13 pages
Published Online:
January 8, 2010
Citation
Isoshima, N, Fujimoto, T, Abe, Y, Watanabe, M, Yamauchi, Y, & Nishida, I. "Development of Cooling Structures for Blu-Ray Disc Compatible Optical Disc Drives Using Computational Fluid Dynamics Based on Cartesian Grid Method." Proceedings of the ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference. ASME 2007 InterPACK Conference, Volume 2. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 895-907. ASME. https://doi.org/10.1115/IPACK2007-33248
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