| 摘要 |
PURPOSE:To obtain a small coil having high performance and high reliability by laminating two or more of spiral conductor patterns of thick film fine lines of specific size on an insulating substrate so that the direction of the current of the spiral conductor pattern is aligned in the same direction. CONSTITUTION:Spiral conductor patterns 2 having 20-200mum of conductor width, 0.5-100mum of conductor interval and 15-200mum of conductor thickness made of conductor, e.g., copper or the like are formed on an insulating substrate 1 made, for example, of polyimide film or the like having excellent flexibility and heat resistance, more than two patterns are laminated and are bonded with adhesive 4, e.g., epoxy-nitrile rubber having excellent heat resistance, insulation and adherence. The patterns are so connected via through hole or stepwisely with connecting conductor 5 so that the direction of the currents of the patterns is aligned in the same direction. In this manner, a small coil having large inductance and small DC resistance value can be formed. |
