Patent ID: 6223800
Filing Date: 2001-05-01
Classification: B23K,H01L,Y10T

Abstract:
A die bonding apparatus comprising:a lead frame supply station made in the form of a loading box for accommodating a plurality of lead frames by putting one lead frame upon another lead frame;a frame transferring device for picking up a lead frame from said lead frame supply station using vacuum suction and transferring said lead frame to selectively one of an Ag epoxy application table and a first traveling rail;a frame fixing station for fixing the lead frame transferred by said frame transferring device to said Ag epoxy application table by suction power of a vacuum pump and moving said lead frame back and forth through actuation of a motor;an Ag epoxy supply station for ejecting a predetermined amount of Ag epoxy through a nozzle to a top surface of said lead frame fixed to said Ag epoxy application table in said frame fixing station;a moving device for moving said lead frame forward on said first traveling rail;a preheating station for receiving said lead frame moved forward on said first traveling rail in said moving device into a magazine of a preheater and preheating said lead frame, thereby to complete coating;a wafer placement station for transferring wafers sequentially supplied by a wafer supply station to a predetermined location through rotation wherein said wafer includes one or more dies each having a unit device;a die transferring device for individually picking up said each die of a semiconductor device placed at a predetermined location in said wafer placement station and transferring said die to a work site for die bonding;a die bonding station for precisely bonding the die transferred by said die transferring device to a site where selectively either a tape is stuck or Ag epoxy is applied in said lead frame and the selection is based upon whether the die is a lead on chip or normal bonding feature of, said lead frame having been completely coating-processed and fed from said preheating station via a second traveling rail; anda stocker for accommodating said lead frame to which said die of said semiconductor device has been stably bonded at said die bonding station into an internal magazine.