Method and system for providing an energy assisted magnetic recording disk drive having a non-conformal heat spreader

An energy assisted magnetic recording (EAMR) transducer coupled with a laser for providing energy and having an air-bearing surface (ABS) configured to reside in proximity to a media during use, the EAMR transducer comprising:

• a waveguide configured to direct the energy from the laser toward the ABS;
• a near field transducer (NFT) proximate to the ABS and extending a distance from the ABS into the EAMR transducer, the NFT being optically coupled with the waveguide and for focusing the energy onto a region of the media, the NFT including a disk and a pin between the disk and the ABS;
• a write pole configured to write to the region of the media;
• a heat sink thermally coupled with the disk of the NFT and having a top surface, the heat sink residing between the disk of the NFT and the write pole, at least a portion of the top surface of the heat sink being conformal with the write pole;
• a heat spreader thermally coupled with the NFT and having a skin depth corresponding to the energy, a first portion of the heat spreader residing between a portion of the heat sink and the pole, the first portion of the heat spreader having a first width in the track direction, a second portion of the heat spreader having a second width in the track width direction, the first portion being between the ABS and the second portion, the first width at least as large as the NFT width, the second width being greater than the first width, at least the second portion of the heat spreader being substantially planar, the second portion of the heat spreader having a thickness and extending in a stripe height direction substantially perpendicular to the ABS, the thickness being at least twice the skin depth and not more than thrice the skin depth;
• and
• at least one coil for energizing the pole.

A method for providing an energy assisted magnetic recording (EAMR) transducer coupled with a laser for providing energy and having an air-bearing surface (ABS) configured to reside in proximity to a media during use, the method comprising:

• providing a waveguide configured to direct the energy from the laser toward the ABS;
• providing a near field transducer (NFT) proximate to the ABS, the NFT being optically coupled with the waveguide and for focusing the energy onto a region of the media, the NFT including a disk having an NFT width in a track width direction;
• providing a write pole configured to write to the region of the media;
• providing a heat spreader thermally coupled with the NFT, a first portion of the heat spreader residing between the NFT and the pole and having a first width in the track direction, a second portion of the heat spreader having a second width in the track width direction, the first portion being between the ABS and the second portion, the first width at least as large as the NFT width, the second width being greater than the first width;
• and
• providing at least one coil for energizing the write pole.