| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive hydrodynamic bearing device having high durability and reliability. SOLUTION: Microscopic droplets of ink 12 containing coupling agent are landed or dropped onto a raw material 2a' constituting a shaft part and then hardened to form a hydrodynamic pressure generation part with a trace-of-ink aggregate. Titanate coupling agent is used as the coupling agent for improving the adhesiveness of the ink which forms the metal shaft part and a hydrodynamic pressure groove. To the ink, leveling agent is added for controlling the surface tension. COPYRIGHT: (C)2008,JPO&INPIT
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