| 摘要 |
PURPOSE:To achieve sufficient driving force for speaker by laminating pattern layers and insulating layers alternately into a multilayer structure while altering the inclining direction of a pattern formed obliquely on the pattern layer thereby forming a cylindrical multilayer coil. CONSTITUTION:Conductive patterns 14, 15, 16, 17 are formed on the main surface and the opposite end faces of a flexible insulating sheet in a conductive sheet, i.e., a pattern layer 6, and patterns 18-21 and 22-25 are also formed on the pattern layers 7, 8. The conductive patterns are formed obliquely to the flexible sheet in same direction as the pattern layers 6, 8 and the pattern layer 7 is formed reversely. The pattern layers inclining in different directions are laminated in zigzag through insulating layers. The pattern 14 is connected, at one end, with the other end of next pattern 15 thus forming one conductive layer. |
