| abstract |
An object of the present invention is to provide a flexible printed circuit board for a head suspension assembly capable of suppressing electrostatic breakdown of a magnetic head. In a head suspension assembly of a magnetic disk drive, a flexible printed circuit board for directly relaying a magnetic head mounted on a suspension and a connection end of a base end of a carriage arm, comprising at least a base layer And a plurality of conductive circuits formed on the base layer, a cover layer formed on the base layer and the conductive circuit, and at least a conductive polymer layer formed on the cover layer. However, the cover layer is not formed in the magnetic head connection portion, and a conductive polymer layer is formed on the base layer of the magnetic head connection portion. No conductive polymer layer is present on the surface of the conductive circuit, or even if the conductive polymer layer is present, the magnetic head is electrically connected to the conductive circuit. A flexible printed circuit board, characterized in that to the extent that may be substantially absent. [Selection diagram] Fig. 1 |