Patent ID: 9099138
Filing Date: 2015-08-04
Classification: G11B

Abstract:
1. A device having an air bearing surface (ABS), the device comprising: a near field transducer (NFT), the NFT having at least a portion thereof at the ABS; a first wrap layer, the first wrap layer surrounding at least a portion of the NFT, the first wrap layer having a thickness of not greater than about 30 nanometers (nm), and the first wrap layer comprising a material that has a refractive index (n) that is not greater than 2.0; a second wrap layer, the second wrap layer surrounding at least a portion of the first wrap layer, the second wrap layer having a thickness that is not greater than 100 nm, and the second wrap layer comprising a material that has a refractive index (n) that is at least about 1.9; and a top cladding layer surrounding at let a portion of the second wrap layer, the top cladding layer comprising a material that has a refractive index (n) that is not greater than 2.0.