Patent ID: 6529449
Filing Date: 2003-03-04
Classification: B82Y,G11B

Abstract:
A magneto-optical head comprising:a substrate perforated by a hole; a mesa formed within the hole in the substrate of a material having a high refractory index; a first coil arranged on the substrate in a first coil layer, the first coil coiled around the mesa at an increasing radius about the mesa; a first high thermal conductivity insulating layer deposited over the substrate around, between, and overlying the first coil with no intervening material having a relatively low thermal conductivity separating the first high thermal conductivity insulating layer and the first coil, the first high thermal conductivity insulating layer having a planar surface; a second coil arranged on the first high thermal conductivity insulating layer in a second coil layer, the second coil coiled around the mesa at an increasing radius about the mesa; a second high thermal conductivity insulating layer deposited over the first high thermal conductivity insulating layer around, between, and overlying the second coil with no intervening material having a relatively low thermal conductivity separating the second high thermal conductivity insulating layer and the second coil, the second high thermal conductivity insulating layer having a planar surface; and a via passing through the first high thermal conductivity insulating layer and coupling the first coil and the second coil to form a continuous coil in the first and second coil layers.