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Advanced Slider Design and Structure with 3-D Rounded Leading and Trailing Edges

IP.com Disclosure Number: IPCOM000013316D
Original Publication Date: 2000-Aug-01
Included in the Prior Art Database: 2003-Jun-18

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In many recent publications on advanced air bearing slider, various slider designs and structures (1,2) with rounded corners and leading and trailing edges have been shown to reduce head/disk interface surface damage during storage device operation. Overall, the rounded corner or edges of the sliders may be formed by various abrasive, grinding, etching, laser ablation, polishing, burnishing, cutting or other blending processes well known in the art. Generally, sliders with rounded corners or edges increase the impact area on disk surface, distribute the impact force to a larger area and subsequently cause much less (or no) damage on the disk surface as compared to those of sliders with sharp corners and edges. However, most of these rounded slider corners and edges are only in 2-D dimension. For future contact recording where the recording slider head is essentially dragging on top of the magnetic disk surface, the corner and edge rounding (2-D rounding) will not be sufficient in reducing contacting damage, especially when the head/disk interface is under shock or vibration under operating conditions. The one sharp edge left by the 2-D rounding that normally exists by polishing and grinding process will cut and damage the disk/head surfaces during slider pitching, rolling contact during shock, or vibration. This damage become worse in contact recording operation. Described is the conventional slider, but with all of the edges, corners and pads essentially rounding in three 3-D dimension. Basically, all the shape edges in the slider are rounded in the 3-D rounding as in the shape of an egg. The slider edges rounding is essentially in an OVAL SHAPE of three 3-D dimension. A simple example is the rounding in the shape of an egg with larger surface contact area during operation. In this case the contact area between head/disk will be much larger during load/unload operation, shock, vibration. As a result, the damage will be minimized/eliminated/reduced with the slider design with these 3-D rounding shapes at corners/edges and landing pads. 1) Yamaguchi et al. , US Patent #5,301,077