3results about "Optical beam guiding means" patented technology

The purpose of this disclosure is to provide a heat-assisted magnetic recording (HAMR) writer head with high magnetic field reliability and high accuracy. [Solution] Disclosed are a writer head for a heat-assisted magnetic recording device and a method for manufacturing a writer head. The writer head comprises a plurality of layers, including a waveguide cutoff layer, a waveguide layer, a near-field transducer layer, a heat sink layer, and a peg layer. Each layer has a tapered angle near the air bearing surface. The writer head further has a principal axis pole adjacent to an optical component having a similar tapered angle near the air bearing surface.

A data protector according to an embodiment of the present disclosure includes: a data layer configured to record confidential information as a visible image; and one or a plurality of cover layers disposed at least one of above or below the data layer and configured to transition between a color-developed state and a decolored state in a visible wavelength region.