Abstract: The present invention includes a method and apparatus for attenuating flexible circuit resonance. The apparatus includes a flexible circuit assembly. The flexible circuit assembly has a flexible circuit having a flexible cable with first and second sides. The flexible circuit assembly also includes a circuit support. The circuit support includes a base having top and bottom surfaces. The bottom surface is attached to the first side of the flexible cable. The circuit support also includes a support wall extending substantially perpendicularly relative to the top surface of the base. The support wall has a first face, which is substantially oriented towards the top surface of the base. The first side of the flexible cable is attached to the first face and also faces a second face of the support wall to thereby reverse a direction in which the flexible cable faces.

Abstract: An improved rotational motor, such as a spindle motor for a disc drive, is provided. The motor first comprises a hub having a shaft portion and a horizontal body portion. The motor also comprises a sleeve surrounding the shaft portion of the hub. A fine vertical gap is retained between the shaft and the inner diameter of the surrounding sleeve. In addition, a fine horizontal gap is provided between the upper hub portion and the top of the sleeve. The vertical gap is filled with a lubricating liquid, such as a clean oil. A capillary seal is provided in the vertical fluid gap at one end. Preferably, the capillary seal is disposed at an upper end of the shaft proximal to the horizontal gap. Novel air pumping grooves are machined along the horizontal fluid gap. When the hub is rotated, the air pumping grooves create a high pressure region in the vicinity of the capillary seal.