Hiroaki Furuichi
Hitachi
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Publication
Featured researches published by Hiroaki Furuichi.
optical fiber communication conference | 2001
Kimio Tatsuno; Masataka Shirai; Hiroaki Furuichi; Katsumi Kuroguchi; Naohiko Baba; Hideyuki Kuwano; Yasunori Iwafuji; A. Murata
50-GHz-spacing multi-wavelength-locker was developed. It consists of a temperature-compensated Fabry-Perot-etalon integrated in a transmitter-module with a monolithic-modulator and a DFB-laser. Its locking-accuracy is less than +/-10-pm and capture-range is more than +/-0.12-nm.
international conference on electronic packaging and imaps all asia conference | 2015
Yoshio Oozeki; Hiroaki Furuichi; Rika Nomura; Satoshi Arai
UV-curing acrylic adhesives characterized by relatively high elastic modulus at room temperature and high Tg are prone to provide inadequate adhesive strength because of the stress concentration at the interface between the adhesive and the adherend. We used two types of metal adherend (Zn), one with a flat surface structure and the other with a sawtooth surface structure, to verify the effect of the surface morphology of the adherend on the initial adhesiveness and reliability [1]. The results showed that, by employing the sawtooth structure for the adherends surface morphology, the initial adhesive strength increased significantly regardless of the adhesive type, and that the fracture mode shifted from the dominant interfacial failure mode to the mixed mode of interfacial failure accompanied with cohesive failure. On the other hand, the adhesive strength after reliability tests had different tendencies depending on the adhesive types. It was found that, for adhesives having a higher crosslink density, coupled with the effect of the sawtooth structure, the rate of deterioration accelerated to cause the adhesive strength to decrease significantly, and that the fracture mode transitioned only to the interfacial fracture mode over storage time under reliability test storage conditions of 60°C/90%RH. Accordingly, to simultaneously achieve higher reliability and increased adhesive strength, it is essential to apply the sawtooth structure for the adherends surface morphology and use adhesives having a lowered crosslink density.
Archive | 2007
Satoshi Arai; Hiroaki Furuichi; Yoshio Oozeki; Rika Nomura; Kazumi Takahashi
Archive | 2004
Shohei Hata; Hideo Sotokawa; Hiroaki Furuichi
Archive | 2007
Satoshi Arai; Hiroaki Furuichi; Yoshio Oozeki; Rika Nomura; Masayuki Okamura; Kazumi Takahashi; Mitsuo Satake
Archive | 2002
Kimio Tatsuno; Katsumi Kuroguchi; Atsuhiro Yamamoto; Teruhisa Azumaguchi; Hiroaki Furuichi
Archive | 2001
Kimio Tatsuno; Katsumi Kuroguchi; Hiroaki Furuichi; Atsuhiro Yamamoto; Norio Nakazato
Archive | 2005
Yoshio Oozeki; Hiroaki Furuichi; Satoshi Arai; Hideo Sotokawa
Archive | 2006
Hiromichi Hiramatsu; Hiroaki Furuichi; Satoshi Arai; Rika Nomura; Mitsuo Satake
Archive | 2002
Hiroaki Furuichi; Kazumi Kawamoto; Katsumi Kuroguchi; Keiichi Yamada; Shintarou Sakamoto