Die bonding material for LED encapsulation and preparation method thereof
An LED packaging and die-bonding technology, applied in electrical components, circuits, semiconductor devices, etc., can solve problems such as the inability to meet the heat dissipation requirements of power LEDs, the inability of thermal conductivity to meet the heat dissipation requirements, and the increase of die-bonding thermal resistance, so as to improve the lifespan, The effect of reducing thermal resistance and junction temperature
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[0039] Example 1
[0040] The solid crystal material of this embodiment is prepared by the following method: mixing 20% volume fraction of diamond particles with a particle size of 5-20 microns and 80% volume fraction of Au80Sn20 with a particle size below 20 microns to obtain a mixed powder. By weight percentage, 50% of diethylene glycol hexyl ether, 30% of in-situ hydrogenated rosin resin, 5% of phytic acid, 3% of polyphthalamide resin, 10103% of antioxidant, and 9% of trimethylamine are mixed to obtain crystal solidification aid solder paste. The above mixed powder is mixed with the die-bonding flux paste according to a weight ratio of 85:15 to obtain a die-bonding material.
Example Embodiment
[0041] Example 2
[0042] The solid crystal material of this embodiment is prepared by the following method: mixing 10% volume fraction of carbon nanotubes with a particle size of <5 microns and 90% volume fraction of Au80Sn20 with a particle size below 20 microns to obtain a mixed powder. By weight percentage, 40% of ethylene glycol phenyl ether, 40% of acrylic resin, 6% of tartaric acid, 4% of fatty acid phthaloamine wax, 2% of antioxidant TBHQ and 8% of diethylpropylamine are mixed to obtain solid crystal soldering paste. The above mixed powder is mixed with the die-bonding flux paste according to a weight ratio of 85:15 to obtain a die-bonding material.
Example Embodiment
[0043] Example 3
[0044] The solid crystal material of this embodiment is prepared by the following method: mixing 15% volume fraction of diamond particles with a particle size below 5-20 microns and 85% volume fraction of SnAg3Cu0.5 with a particle size below 20 microns to obtain a mixed powder. By weight percentage, 60% of diethylene glycol butyl ether, 20% of phenolic resin, 8% of malic acid, 2% of hydrogenated castor oil, 3% of antioxidant BHT, and 7% of diethanolamine are mixed to obtain solid crystal flux paste. The above mixed powder is mixed with the die-bonding flux paste according to a weight ratio of 80:20 to obtain a die-bonding material.
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