Integration of a vertical cavity surface emitting laser (VCSEL) on an energy-assisted magnetic recording (EAMR) head
View Patent ↗An energy-assisted magnetic recording apparatus comprises a magnetic recording head having an end surface and an interface surface perpendicular to the end surface. The apparatus further comprises a vertical cavity surface emitting laser (VCSEL) bonded to the interface surface and configured to emit laser light through the interface surface and into the magnetic recording head. The magnetic recording head includes one or more light redirecting structures for redirecting the laser light towards the end surface. A method of making an energy-assisted magnetic recording apparatus comprises the steps of aligning a first wafer including a plurality of VCSELs with a second wafer including a plurality of magnetic recording heads, such that an emitting region of each of the plurality of VCSELs is disposed over a light redirecting structure of a corresponding one of the plurality of magnetic recording heads, and bonding the first wafer to the second wafer.
1. An energy-assisted magnetic recording apparatus comprising:
a magnetic recording head having an end surface and an interface surface perpendicular to the end surface; and
a vertical cavity surface emitting laser (VCSEL) bonded to the interface surface and configured to emit laser light through the interface surface and into the magnetic recording head;
wherein the magnetic recording head includes one or more light redirecting structures for redirecting the laser light towards the end surface.
2. The energy-assisted magnetic recording apparatus of claim 1 , wherein the VCSEL is configured to emit laser light perpendicular to the interface surface.
3. The energy-assisted magnetic recording apparatus of claim 1 , wherein the one or more light redirecting structures include a mirror configured to reflect the laser light towards the end surface.
4. The energy-assisted magnetic recording apparatus of claim 3 , wherein the mirror comprises a film of metal selected from the group consisting of aluminum (Al), silver (Ag), gold (Au) and copper (Cu).
5. The energy-assisted magnetic recording apparatus of claim 1 , wherein the one or more light redirecting structures include a waveguide.
6. The energy-assisted magnetic recording apparatus of claim 5 , wherein the one or more light redirecting structures comprises a diffractive grating to couple the laser light into the waveguide.
7. The energy-assisted magnetic recording apparatus of claim 5 , wherein the waveguide includes a core layer and a cladding layer, and wherein the core layer has a higher refractive index than a refractive index of the cladding layer.
8. The energy-assisted magnetic recording apparatus of claim 7 , wherein the one or more light redirecting structures comprises a diffractive grating to couple the laser light into the core layer of the waveguide.
9. The energy-assisted magnetic recording apparatus of claim 1 , wherein the interface surface comprises one or more contact pads for providing power to the VCSEL.
10. The energy-assisted magnetic recording apparatus of claim 9 , wherein the contact pads are also for bonding the VCSEL to the interface surface.
11. The energy-assisted magnetic recording apparatus of claim 1 , wherein the end surface is an air bearing surface.
12. A magnetic disk drive comprising:
the energy-assisted magnetic recording apparatus of claim 1 ; and
a magnetic media opposite the end surface of the magnetic recording head.