Patent Number: 6,480,364

Title: Thermally compensated rotary positioning system for a disc drive

Abstract: Apparatus and method for cooling the actuator coil with a suitable heatsink structure. The heat sink thermally couples the coil to one or more ofthe head-carrying arms, which are positioned close enough to the discstack that rotation of the stack cools them. In one embodiment, a gap isformed between the coil and a thermal conduit, and the gap is made wideenough to allow a majority of the gap to be filed with a solid dielectric.Another embodiment is a method for controlling the minimum gap thickness.In yet another embodiment, a rotary actuator includes a heat conduit witha concave surface for bonding to the coil, increasing rigidity and thermalconduction.

Inventors: Thanomsat; Chayakorn (Bloomington, MN), Koester; David Douglass (Chanhassen, MN), Resh; Roger Alan (Prior Lake, MN)


International Classification: G11B 5/55 (20060101); G11B 5/48 (20060101); G11B 033/14 (); G11B 005/55 ()

Expiration Date: 11/12014