METHOD FOR MANUFACTURING SPHERICAL ALUMINA POWDER CAPABLE OF GENERATING THE THERMAL CONDUCTIVITY OF THE ALUMINA POWDER WITH RESPECT TO A RESIN COMPOSITE FOR A SEMICONDUCTOR ENCAPSULATING MATERIAL

摘要

PURPOSE: A method for manufacturing spherical alumina powder is provided to improve the yield of the alumina powder with few content of uranium using aluminum hydroxide powder with specific physical characteristic.;CONSTITUTION: A method for manufacturing spherical alumina powder includes the following: Aluminum hydroxide powder is sprayed into flames. Spherical alumina powder is collected in a cyclone(6). The specific surface area of the aluminum hydroxide powder is more than or equal to 0.3m^2/g and is less than or equal to 3m^2/g based on a nitrogen absorbing method. A ratio of an average diameter(D50) to a sphere converted diameter(Dbet)(D50/Dbet) is less than and equal to 10. The average diameter of the aluminum hydroxide powder is more than or equal to 2um and is less than or equal to 100um.;COPYRIGHT KIPO 2012