| 摘要 |
PURPOSE:To prevent the leakage and radiation of electromagnetic wave from electronic equipment to the outside by enclosing an electric wave source and an article with a ferrite sheet the main component of which is ferrite, and molding a printed board out of the ferrite sheet thereby to absorb the electric wave by ferrite. CONSTITUTION:An electric wave source 1 and an article 2 incorporating the electric wave source 1 are enclosed and covered with a ferrite sheet 3 obtained by molding and hardening a material mainly composed of fine ferrite particles into a thin sheet, or a printed board is molded out of the ferrite sheet and the electric wave is absorbed by the material properties of ferrite. As the method of enclosing a covering, the ferrite sheet 3 is used, and an inner case 4 is provided for directly enclosing the printed board, microcomputer chip and the like of the electric wave source 1, and the inner case 4 itself is formed from the ferrite sheet 3 or the ferrite sheet 3 is applied on and bonded to the inner surface of the inner case 4. Alternatively, the printed board as the electric wave source 1 is formed from the ferrite sheet 3. |
