Abstract: A printed circuit substrate may be configured with at least one internal lead designed and shaped to reduce solder bridging. The printed circuit substrate can have a plurality of internal leads that each has a continuously curvilinear boundary that defines an isolation channel. The isolation channel may be configured with a uniform distance that separates a first internal lead from an adjacent second internal lead.

Abstract: A printed circuit substrate may be configured with at least one internal lead designed and shaped to reduce solder bridging. The printed circuit substrate can have a plurality of internal leads that each has a continuously curvilinear boundary that defines an isolation channel. The isolation channel may be configured with a uniform distance that separates a first internal lead from an adjacent second internal lead.

Abstract: A head stack assembly comprising an actuator arm having an aperture therein, a head suspension assembly comprising a load beam having a mounting region with a aperture therein, and a base plate adapted to attach the head suspension assembly to the actuator arm, with the base plate comprising a boss tower having an outside surface and a swaging hole. One of the actuator arm aperture, the boss tower outside surface or the swaging hole is non-circular to provide increased compression between the boss tower and the actuator arm aperture in the roll direction than in the pitch direction. Methods of making a boss tower are also provided.

Abstract: In certain embodiments, a method includes positioning a tolerance ring (102) between a bearing assembly (100) and an actuator arm (104). The tolerance ring (102) is compressed so that the tolerance ring buckles at predetermined weak points (106) to position the bearing assembly (100) relative to the actuator arm. In certain embodiments, an assembly includes a tolerance ring (102) buckle-fitted between first (100) and second (104) annular surfaces, the tolerance ring (102) buckled at designated weak points (106) to position the first annular surface (100) to the second annular surface (104).

Abstract: A head stack assembly comprising an actuator arm having an aperture therein, a head suspension assembly comprising a load beam having a mounting region with a aperture therein, and a base plate adapted to attach the head suspension assembly to the actuator arm, with the base plate comprising a boss tower having an outside surface and a swaging hole. One of the actuator arm aperture, the boss tower outside surface or the swaging hole is non-circular to provide increased compression between the boss tower and the actuator arm aperture in the roll direction than in the pitch direction. Methods of making a boss tower are also provided.

Abstract: A mount plate includes a flange having a first surface and an opposing second surface and a boss tower having a swage hole and extending from an area where the boss tower meets the first surface of the flange to an end surface of the boss tower. The boss tower has an inner diameter defining an inner surface of the swage hole, an outer diameter defining a portion of an outer surface of the boss tower and at least one cut-out portion formed in the boss tower along an obliquely angled plane. The cut-out portion intersects with the outer surface at a first area located a first distance from where the boss tower meets the first surface of the flange and intersects with the end surface at a second area located a second distance from the inner diameter. The first distance is less than the second distance.

Abstract: In certain embodiments, a method includes positioning a tolerance ring between a bearing assembly and an actuator arm. The tolerance ring is compressed so that the tolerance ring buckles at predetermined weak points to position the bearing assembly relative to the actuator arm. In certain embodiments, an assembly includes a tolerance ring buckle-fitted between first and second annular surfaces, the tolerance ring buckled at designated weak points to position the first annular surface to the second annular surface.