Dowa Electronics Materials Co., Ltd.

Dowa IP Creation Co., Ltd.

Yuki Kitahara

Shou Ogawa

A carrier core material formed with ferrite particles, the skewness Rsk of the particle is equal to or more than &#x2212;0.40 but equal to or less than &#x2212;0.20, and the kurtosis Rku of the particle is equal to or more than 3.20 but equal to or less than 3.50. Here, the maximum height Rz of the particle is equal to or more than 2.20 &#x3bc;m but equal to or less than 3.50 &#x3bc;m. Moreover, the ferrite particle contains at least either of Mn and Mg elements. In this way, cracking or chipping in a concave-convex portion of a particle surface is unlikely to occur, and moreover, the amount of coating resin used can be reduced without properties such as electrical resistance being lowered.

Growing community of inventors

Okayama, Japan

Yuki Kitahara