Patent ID: 9685596
Date: 2017-06-20
CPC Classifications: H01L

Claim:
1. A package method comprising: providing a light emitting module having a substrate and at least one light emitting unit disposed on the substrate, wherein the light emitting unit having a main light emitting surface; providing a mold having at least one recess and maintaining the recess face upward; filling the recess with a molding compound having phosphor particles comprising a plurality of first phosphor particles and a plurality of second phosphor particles, an emission wavelength of the first phosphor particles is smaller than an emission wavelength of the second phosphor particles, the first phosphor particles in the molding compound having a first concentration per unit volume, the second phosphor particles in the molding compound having a second concentration per unit volume; placing the substrate on the mold reversely, so that the light emitting unit is faced downward and immersed into the recess and the molding compound directly encapsulates the light emitting unit; heating and pressing the substrate and the mold, so as to enable the phosphor particles to deposit at positions closer to an inner surface of the recess and solidify the molding compound; and removing the mold to uncover the solidified molding compound to achieve that a concentration per unit volume of the phosphor particles is greater at a closer position to an outer surface of the solidified molding compound than at a farther position away from the outer surface of the solidified molding compound, wherein the first concentration per unit volume is larger than the second concentration per unit volume at a first position away from the main light emitting surface, the first concentration per unit volume is smaller than the second concentration per unit volume at a second position that is closer to the main light emitting surface than the first position after heating and pressing the substrate and the mold.