JPS648638A - Marking device - Google Patents

Abstract

PURPOSE:To alleviate ink viscosity management, and to mark using a suitable amount of ink by providing a printing liquid introducing groove in a printing pen. CONSTITUTION:When an electromagnetic solenoid 18 is operated, a force for moving down a rod 19 is acted. Since an actuator 22, the rod 19 and a printing pen 16 are connected each other, they move down clockwise as seen from above by the operations of the actuator 22 and a ring 23, and an identification mark is, for example, attached to an improper chip of a semiconductor wafer by the end of the pen 16. When the pin 16 inserted into an ink introduction tube 15 is rotated clockwise, ink 13 is so introduced to be directed toward an introducing direction 25 along a spiral groove 17 on the outer periphery of the pen 16. The ink 13 of the quantity corresponding to the shape of the groove 17 and the rotation of the pen 16 is forcibly supplied to the vicinity of the end 26 of the tube 15. Accordingly, it can prevent an accident, such as the ink from being supplied excessively due to very low ink viscosity to drop or insufficiently due to very high ink viscosity.