| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a conductive plastic spool whose coefficient of thermal expansion is almost equal to that of a bonding wire and which does not cause troubles due to breakage and elasticity deformation. <P>SOLUTION: The spool is formed of a carbon-fiber reinforced thermoplastic resin whose impact strength at room temperature is 80 J/m or more, flexural modulus is 9 GPa or more, volume resistivity is 1×10<SP>3</SP>Ωcm or less and linear expansion coefficient is 1.0×10<SP>-5</SP>to 2.8×10<SP>-5</SP>K<SP>-1</SP>. <P>COPYRIGHT: (C)2004,JPO |
