# US 7,609,480 B2 · Heat-assisted magnetic recording head > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,609,480 B2 - Document ID: US7609480B2 - Status: Granted - Kind: B2 - Application number: 11/480,054 - Filed: 2006-06-30 - Published: 2008-01-17 - Granted: 2009-10-27 - Earliest claimed: 2006-06-30 - Assignees: Seagate Technology LLC - Inventors: Alexander Mikhailovich Shukh; Alexandre Vasilievich Demtchouk - Web page: https://patentgrep.com/patent/US7609480B2 ## CPC - G02B 6/12002: {Three-dimensional structures} - G02B 6/12004: {Combinations of two or more optical elements} - G02B 2006/12107: {Grating} - G02B 2006/12121: {Laser} - G11B 2005/0021: {Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract An apparatus, comprising a slider. The slider includes a substrate with an air bearing surface and a trailing substrate side. The slider includes an optoelectronic heater and a magnetic head being mounted on the trailing substrate side. Thermal insulation is interposed between the optoelectronic heater and the magnetic head. The optoelectronic heater is thermally coupled to the trailing substrate side. ## Claims ### Claim 1 An apparatus, comprising: a slider including a substrate with an air bearing surface and a trailing substrate side, and including an optoelectronic heater and a magnetic head mounted on the trailing substrate side; thermal insulation comprising a spacer layer interposed between the optoelectronic heater and the magnetic head; and a buffer layer thermally coupling the optoelectronic heater to the trailing substrate side, the buffer layer having a high thermal conductance relative to the thermal conductance of the spacer layer. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the magnetic head comprises a reader and a writer, the reader being disposed adjacent the spacer layer. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the thermal insulation inhibits heat flow from the optoelectronic heater to the magnetic head, reducing the temperature of the magnetic head. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the optoelectronic heater comprises a laser and a waveguide, the laser being disposed between the waveguide and the trailing substrate side. ### Claim 5 (depends on 1) The apparatus of claim 1. wherein the optoelectronic heater is disposed upstream of the magnetic head along an aerodynamic flow path adjacent the slider. ### Claim 6 (depends on 1) The apparatus of claim 1. wherein the optoelectronic heater has an upstream cross-sectional area and the magnetic head has a downstream cross-sectional area that is stacked on the optoelectronic heater in a downstream direction. ### Claim 7 (depends on 6) The apparatus of claim 6, and wherein the downstream cross sectional area is smaller than the upstream cross sectional area. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the spacer layer shields the entire side of the magnetic head facing the optoelectronic heater. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the optoelectronic heater comprises a parabolic waveguide that increases the power density of light emitted by the optoelectronic heater. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the buffer layer is formed of a material selected from the group consisting of a nitride (AlN), an oxide, a carbide of aluminum, magnesium, SiC, MgO, AlMgO, and AlMgN. ### Claim 11 An apparatus, comprising: a slider including a substrate with an air bearing surface and a trailing substrate side, and including an optoelectronic heater disposed adjacent the trailing side and a magnetic head being mounted on the trailing substrate side, wherein the optoelectronic heater comprises a parabolic waveguide that increases the power density of light emitted by the optoelectronic heater; thermal insulation interposed between the optoelectronic heater and the magnetic head, and the optoelectronic heater being disposed adjacent the trailing substrate side. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the magnetic head comprises a reader. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein a first heat input to the optoelectronic heater is greater than a second heat input to the magnetic head. ### Claim 14 (depends on 11) The apparatus of claim 11, wherein: the thermal insulation comprises a spacer layer that shields the entire side of the magnetic head facing the optoelectronic heater; and the apparatus comprises a buffer layer interposed between the optoelectronic heater and the substrate, the buffer layer having a high thermal conductance relative to the spacer layer. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the buffer layer is formed of a material selected from the group consisting of a nitride (AlN), an oxide, a carbide of aluminum, magnesium, SiC, MgO, AlMgO, and AlMgN. ### Claim 16 (depends on 11) The apparatus of claim 11, wherein the optoelectronic device comprises a laser diode. ### Claim 17 An apparatus, comprising: a slider substrate with a buffer layer on a trailing side thereof; optoelectronic layers disposed adjacent the buffer layer, the optoelectronic layer being heated by a first electric current and heat sunk through the buffer layer to the slider substrate; and magnetic head layers disposed adjacent the optoelectronic layers and separated from the optoelectronic layers by a spacer layer that thermally insulates the entire side of the magnetic head layers facing the optoelectronic layers, the magnetic head layers being heated by a second electric current and heat sunk to an ambient, wherein the buffer layer has a high thermal conductance relative to the spacer layer. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the optoelectronic layers comprise a semiconducting material. ### Claim 19 (depends on 17) The apparatus of claim 17, wherein the optoelectronics layers comprise a light emitting diode. ### Claim 20 (depends on 17) The apparatus of claim 17, wherein the optoelectronics layers comprise a laser. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein the optoelectronics layers comprise a parabolic mirror that increase power density of radiation emitted by the laser.