| 摘要 |
PURPOSE:To contrive reduction of magnetic shielding works by carrying out magnetic shielding in parallel with winding forming the patterns for magnetic shielding and winding on the same sheet or on separate sheets. CONSTITUTION:A shield pattern 17 is formed along the circumferential edge of a base material 1 printing with a copper foil or coating a magnetic material. A sheet 18 for magnetic shielding having the shield pattern 17, a sheet 8 for winding constituting a winding base plate and a sheet 19 constituting an insulation plate are each provided with the through hole 4 for a core. In the case of laminating the sheet 8 for winding, the sheet 18 for magnetic shielding is also laminated together. A winding pattern 20 consisting of front and back copper foil patterns 2a, 2b for each winding is placed inside the shield pattern 17 and magnetic shielding is carried out simultaneously with winding in parallel. |
