Apparatus for forming magnetic recording heads
View Patent ↗An apparatus includes: a first layer having a near field transducer positioned in a waveguide cladding; a second layer having a magnetic pole piece; a third layer including a solid immersion mirror; a first lapping guide positioned in the first layer; a second lapping guide positioned in the second layer; and a third lapping guide positioned in the third layer.
1. An apparatus comprising:
a first layer including a near field transducer positioned in a waveguide cladding adjacent to an air bearing surface;
a second layer including a magnetic pole piece having an end positioned adjacent to the air bearing surface;
a third layer including a solid immersion mirror;
a first lapping guide positioned in the first layer at a known location relative to the near field transducer;
a second lapping guide positioned in the second layer at a known location relative to the magnetic pole piece; and
a third lapping guide positioned in the third layer at a known location relative to sidewalls of the solid immersion minor.
2. The apparatus of claim 1 , wherein the first, second, and third lapping guides are centered along a common line in a direction perpendicular to the planes of the layers.
3. The apparatus of claim 1 , wherein each of the first, second and third lapping guides has a triangular shape.
4. The apparatus of claim 3 , wherein the third lapping guide is larger than each of the first and second lapping guides.
5. The apparatus of claim 1 , wherein the lapping guides are coated with a high contrast material.
6. The apparatus of claim 5 , wherein the high contrast material comprises gold.
7. The apparatus of claim 1 , wherein the lapping guides comprise a plasmonic material.
8. The apparatus of claim 1 , wherein the first lapping guide is deposited onto the first layer, the second lapping guide is deposited onto the second layer, and the third lapping guide is deposited onto the third layer.
9. The apparatus of claim 1 , wherein the first lapping guide is etched onto the first layer, the second lapping guide is etched onto the second layer, and the third lapping guide is etched onto the third layer.
10. The apparatus of claim 1 , wherein at least one of the first, second, or third layers includes at least two triangular-shaped lapping guides, wherein one of the triangular-shaped lapping guides is inverted with respect to the other triangular-shaped lapping guide.