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Ch34-I044963.fm Page 163 Thursday, July 27, 2006 7:23 AM
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7:23 AM
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MICROCHANNEL ARRAY CREATION
BY MEANS OF ULTRAPRECISION MACHINING

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F. Andou , A. Yamamoto , T. Kawai , H. Ohmori , T. Ishida and Y. Takeuchi 1
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Dept. of Mechanical Eng., Graduate School ofEng., Osaka University,
Yamadaoka 2-1, Suita, Osaka 565-0871, JAPAN
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Reconstitution Materials Group, Biomaterials Center,
National Institute for Materials Science (NIMS),
1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, JAPAN
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Robomachine Laboratory, FANLJC Ltd.,
Oshino, Yamanashi 401-0597, JAPAN
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Materials Fabrication Laboratory,
The Institute of Physical and Chemical Research (RTKEN),
2-1 Hirosawa, Wako, Saitama 351-0198, JAPAN
ABSTRACT
The study deals with ultraprecision machining of microehannei array chips made of several metals to
evaluate the compatibility between blood and metallic materials which are buried in human bodies as
parts of artificial internal organs, etc. The blood-compatibility of the metallic materials is very important
since their influences for human bodies are not completely clear. Therefore, it is essential to estimate their
bio- and blood-compatibilities. To evaluate them efficiently, it is planned to employ the blood fluidity
measurement by a microehannei array chip with a micro-rheology device. However, the chips are made
of silicon and the shape of their microchannels is limited since they are generally fabricated by photo-
lithographic technologies. To solve the problem, it is required to fabricate the chips with various-shaped
microchannels made of several metals. In the study, consequently, ultraprecision cutting is applied to the
fabrication of the microehannei array. From the experimental results, it is found that ultraprecision cut-
ting has potential of fabricating arbitrary-shaped microehannei array made of various kinds of metals
with high accuracy.

KEYWORDS
ultraprecision cutting, metallic microehannei array, microgroove, rotational tool, non-rotational tool, blood-
compatibilities, blood fluidity evaluation, multi-axis control ultraprecision machining center

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