Spherical coated magnesium oxide powder and method for production thereof, and resin composition comprising the powder

Abstract

Provided is a sphere-shaped coated magnesium oxide powder having a surface coated with a double oxide and having an average shape factor of 1.25 or less, wherein the powder is advantageous not only in that it has excellent humidity resistance, but also in that it has excellent filling property and excellent flowability when being used as filler for a resin. In addition, provided is a method for producing a sphere-shaped coated magnesium oxide powder, wherein the method comprises allowing a compound of an element forming a double oxide to be present on the surface of magnesium oxide powder, and then fusing the resultant magnesium oxide powder at a high temperature so that the surface of the magnesium oxide powder is coated with the double oxide and the magnesium oxide powder is shaped into sphere. Further, provided are a resin composition comprising the sphere-shaped coated magnesium oxide powder and an electronic device using the resin composition.

Description

technical field

[0001] The present invention relates to a spherical coated magnesium oxide powder which is excellent in moisture resistance and has excellent filling properties when used as a filler, and a method for producing the same. Also, the present invention relates to a resin composition containing the spherical coated magnesium oxide powder, and an electronic device using the resin composition. Background technique

[0002] Electronic devices are composed of electronic components such as laminates, printed circuit boards, and multilayer circuit boards. In electronic components, generally, resin compositions are used for prepregs, partition walls, encapsulants, adhesive sheets, and the like, and therefore various performances or characteristics are required for the resin compositions. For example, the recent trend can be seen in the mounting of large-capacity power electronic components and high-density mounting in electronic devices. With these, resin compositions a...