Samsung Electronics Co., Ltd.

Eui-Sup Ka

Sung-Wook Kim

Woo-Sung Kim

A disk mounting hub has a disk-mounting face formed at one end as a truncated conical surface of revolution symmetric about a central axis. A cylindrical inner hub member is coaxial with the hub body outside diameter and the surrounding mounting face. The inner hub member is adapted to receive a planar disk with a central opening. The mounting face is disposed at a hub face angle (&#x3c0;/2+/&#x2212;&#x3a9;) relative to the central axis. Hub face angle &#x3a9; is selected so that a disk clamping force F applied to an inner disk portion surrounding the opening bends a portion of the disk interior to the hub inside diameter to conform with the conical disk-mounting face. This interior bending portion reduces or eliminates the tendency of the outer disk portion to form an excessive conning angle &#x3a6;.

Conning motor hub surface to compensate disk conning angle for balanced head flying height on both sides of a disk in mirror abs hard disk drives

A hard disk hub has a disk-mounting face formed at one end as a truncated conical surface of revolution symmetric about the hub axis. A cylindrical inner hub member is coaxial with the hub body outside diameter and the surrounding mounting face. The inner hub member is adapted to receive a planar disk with a central mounting hole with disk inside diameter fitted around it. The mounting face is disposed at a hub conning angle (&#x3c0;/2+/&#x2212;&#x3a9;) relative to the hub axis. Hub conning angle &#x3a9; is selected so that a disk mounting force F applied to an inner disk portion surrounding the central mounting opening bends a portion of the disk interior to the hub inside diameter to conform contiguous facing relationship with the conical disk-mounting face. This interior bending portion reduces or eliminates the tendency of the outer disk portion to form an excessive conning angle &#x3b8;.

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Cupertino, CA, United States of America

Eui-Sup Ka