Patent ID: 6307818
Filing Date: 2001-10-23
Classification: G11B

Abstract:
A lens holder and a coil assembly for reading and writing magneto-optical data forming an integrated assembly in semiconductor wafers comprisinga first wafer having a front and a back;a second wafer;a coil formed in a depression on a surface on said front of said first wafer, said depression being of a sufficient depth to maintain said surface substantially planar when said surface is bonded to said second wafer;said coil having leads forming a part of said first wafer to spaced bonding pads on said first wafer;said second wafer being bonded to said surface of said first wafer;a first region in said second wafer supporting a lens aligned with an opening in substantially a center of said coil for passing a light through said opening; anda second region in said second wafer bonded to said first wafer comprising a feedthrough passing through said second wafer for allowing electrical connections to said bonding pads.