APPARATUS FOR MONITORING UNLOADING FOR WIRE BONDING

摘要

PURPOSE: An unloading monitoring apparatus is provided to improve a yield and a quality of a lead frame by monitoring a height of a lead frame so that a wire-bonded lead frame is exactly loaded on an unloading magazine. CONSTITUTION: An unloading monitoring apparatus comprises a sensing part(10) which senses a height of a lead frame. A signal amplifier(20) amplifies a sense signal from the sensing part, and an analog-to-digital converter(30) converts a signal from the signal amplifier(20) into a digital signal. A synchronous signal generator(40) generates a synchronous signal for synchronizing an operation of the converter(30). A difference sensing part(50) calculates a distance from a reference surface of the lead frame to a declination surface, from the digital signal of the converter(30). A declination judging part(60) compares the calculated distance with an allowable error to calculate an error value. An error signal generator(70) generates an error message when the distance is more than the allowable error, and a central control part(80) responds to the error message to control an index motor driving part(90).