Singulation Characteristics of Semiconductor Package Using Pulsed Fiber Laser and SHG:YAG Laser
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- Okamoto Yasuhiro
- Okayama University
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- Kitada Ryoji
- Okayama University
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- Okada Akira
- Okayama University
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- Uno Yoshiyuki
- Chugoku Polytechnic College
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Abstract
A laser singulation method by the superposition of a pulsed fiber laser and an SHG:YAG laser (SHG: Second Harmonic Generation) was proposed to perform the high-quality processing of semiconductor packages, which are consisted of thermosetting epoxy-resin with silica as the molding compounds and a glass epoxy board with insulator coatings for the semiconductor package. The superposition of the pulsed fiber laser and SHG:YAG laser with a high pulse repetition rate led to a straighter kerf shape with a smaller kerf width under the same pulse energy condition. A smaller kerf width was achieved by controlling the time-delay between the laser pulses compared with synchronized laser pulses. The heat affected zone from the cut surface was reduced by the superposition of the pulsed fiber laser and SHG:YAG laser. Moreover, synchronized laser pulses led to a smaller heat affected zone compared with unsynchronized pulses.
Journal
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- International Journal of Electrical Machining
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International Journal of Electrical Machining 19 (0), 28-33, 2014
The Japan Society of Electrical Machining Engineers
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Details 詳細情報について
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- CRID
- 1390282680732481024
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- NII Article ID
- 130004709077
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- NII Book ID
- AN10564586
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- ISSN
- 21885117
- 13417908
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- NDL BIB ID
- 028573074
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed