LED ENCAPSULANT COMPRISNG A RARE EARTH METAL OXIDE PARTICLES

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The present invention relates to an LED encapsulant comprising rare earth metal oxide particles, and more particularity, to an LED encapsulant comprising a compound which is represented by following chemical formula 1 : M_a(OH)_b(CO_3)_cO_d in a polymer resin, and has a particle diameter in a circularity, defined by equation 1, within 0.5 to 1. A composition for the encapsulant of the present invention dramatically improves light extraction efficiency created on an LED chip. In the chemical formula 1 : M is Sc, Y, La, Al, Lu, Ga, Zn, V, Zr, Ca, Sr, Ba, Sn, Mn, Bi, or Ac; and a is 1 or 2, b is 0 to 2, c is 0 to 3, and d is 0 to 3. However, b, c, and d are not simultaneously 0, and b and c are simultaneously 0 or not simultaneously 0.COPYRIGHT KIPO 2016