| 摘要 |
PURPOSE:To prevent the breakage of winding of the bonding wire completely in spite of vibration or impact during transportation or storage of the spool winding by covering a peripheral surface of the spool winding with a thin film having soft elasticity softly so as to hold it elastically, thereby restraining the movement in a winding-width direction completely. CONSTITUTION:A spool 1 has a multiplayer form in which a bnding wire 2 is wound with crossing at a constant pace. The whole periphery of the spool winding 3 is covered with a sheet 6 provided with a tape 4 for cutting which is arranged so as to cross the spool and to project from the side of the spool, at an end portion of the sheet 6 and with a thin film having a soft elasticity, i.e. a urethane resin film 5 comprising extremely minute bubbles, on the inner surface. The tape 4 for cutting wraps an outer surface of another end portion of the sheet 6 and one end is stuck to, thereby holding the winding 3. |
