Katsuhide Natori
Fujitsu
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Publication
Featured researches published by Katsuhide Natori.
japan international electronic manufacturing technology symposium | 1995
Seiki Sakuyama; Hiroki Uchida; Isao Fujitsu Limited Watanabe; Katsuhide Natori; Takehiko Sato
We developed a new reflow soldering technique, which uses selective infrared radiation. We use an aluminum-oxide heater and a halogen-heater for the IR sources. The aluminum-oxide heater radiates intensive infrared rays between about 5 to 8 /spl mu/m. This wavelength is readily absorbed by a glass-epoxy substrate. The halogen-heater radiates intensive infrared rays between about 1 to 2 /spl mu/m. This wavelength is readily absorbed by the resin used in quad flat packages (QFPs). By using these heaters, we can selectively heat the devices on a printed circuit board (PCB). The temperature difference between the PCB substrate and the large QFPs was reduced to about half that for conventional heating. This reduced temperature difference allows us to reflow solder the PCB at about 215/spl deg/C. This temperature is the same temperature as vapor phase soldering and is about 20/spl deg/C to 30/spl deg/C lower than conventional infrared reflow soldering.
Archive | 1992
Toshiro Higuchi; Saku Egawa; Toshiki Niino; Katsuhide Natori; Fumio Tabata
Archive | 1994
Toshiro Higuchi; Saku Egawa; Masao Hiyane; Katsuhide Natori
Archive | 1989
Katsuhide Natori; Isao Watanabe; Koji Katsuyama; Isao Kawamura; Karuhiko Yamamoto; Takeshi Nagai
Archive | 1987
Tsutomu Iikawa; Takeaki Sakai; Isao Kawamura; Katsuhide Natori; Takeshi Nagai; Shigeki Okamoto
Archive | 1993
Eiji Horikoshi; Motoaki Tani; Isao Watanabe; Katsuhide Natori; Takehiko Sato
Journal of The Japan Institute of Metals | 1989
Takeshi Nagai; Katsuhide Natori; Takashi Furusawa
Archive | 1983
Tsutomu Iikawa; Takeaki Sakai; Isao Kawamura; Katsuhide Natori; Takeshi Nagai
Archive | 1987
Katsuhide Natori; Isao Watanabe; Koji Katsuyama; Isao Kawamura; Haruhiko Yamamoto; Takeshi Nagai
IEEE Transactions on Components, Hybrids, and Manufacturing Technology | 1986
Tsutomu Iikawa; Takeaki Sakai; Shigeki Okamoto; Katsuhide Natori; Takeshi Nagai