ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,915, issued on July 1, was assigned to SEAGATE TECHNOLOGY LLC (Fremont, Calif.).

"Heterogeneous integration of active layers on a heat-assisted magnetic recording slider" was invented by Vivek Krishnamurthy (Eden Prairie, Minn.), Scott Eugene Olson (Eagan, Minn.) and Jiaoming Qiu (Maple Grove, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A hard disk drive (HDD) includes a heat-assisted magnetic recording (HAMR) head. The HAMR head includes one or more features comprising a laser device that is a heterogeneous integrated epitaxial grown GaAS laser. The laser device couples directly with a waveguide that transfers the electromagnetic radiation ...