Patent ID: 8119427
Filing Date: 2012-02-21
Classification: H01L

Abstract:
1. A method of light-emitting-diode (LED) die-bonding, comprising the steps of: coating the back side of an LED chip with a magnetic material; placing the LED chip in a packaging cup having a bottom such that the back side of the LED chip is in contact with the bottom of the packaging cup; applying a magnetic field in a region near the bottom of the packaging cup so as to exert a magnetic force on the LED chip via the magnetic material coated on the back side of the LED chip, thereby holding the LED chip in place against the bottom of the packaging cup; while the magnetic field is applied, bonding one end of a first conductive wire to an anode of the LED and the other end of the first conductive wire to a first electrode, and bonding one end of a second conductive wire to a cathode of the LED and the other end of the second conductive wire to a second electrode, wherein the first electrode and the second electrode are attached to the packaging cup; removing the magnetic field; filling the packaging cup with an epoxy; and curing the epoxy.