Sensor stripe encapsulation layer in a read/write head
AssigneeSeagate Technology LLC
InventorsDaniel Paul Burbank, Kevin Richard Heim
Life of this patent
Estimating the term…
Abstract
A magnetoresistive read head has read head layers that are shaped to form an air bearing surface and a sensor stripe cavity with an open side at the air bearing surface. A sensor stripe is deposited in the sensor stripe cavity. The sensor stripe has a front surface that is set back from the air bearing surface to define an encapsulation cavity extending from the front surface to the air bearing surface. An encapsulation layer is deposited in the encapsulation cavity. The encapsulation layer encapsulates the front surface.
Claims22
An electrical lap guide for use in lapping a feature layer, comprising:
- a substrate layer supporting the feature layer on a substrate layer surface that is perpendicular to an external surface;
- and
- a pattern of conductive material on the substrate layer, the pattern of conductive material including first and second electrical interconnection pads and a lapping region conductively joining the first and second electrical interconnection pads, the lapping region having a shape with a periodic feature to provide an electrical conductance at the first and second electrical interconnection pads that varies periodically as the external surface is lapped.
An electrical lap guide for use in lapping a feature layer, comprising:
- a pattern of conductive material including first and second electrical connections and a lapping region joining the first and second electrical connections, the lapping region having a edge exposed at an external surface, and the lapping region having a shape with a periodic feature to provide an electrical conductance at the first and second electrical connections that varies periodically as the external surface is lapped;
- and
- a monitoring circuit electrically connected to the first and second electrical connections.
An electrical lap guide for use in lapping a feature layer, comprising:
- a substrate layer supporting the feature layer on a substrate layer surface that is perpendicular to an external surface;
- a pattern of conductive material on the substrate layer, the pattern of conductive material including first and second electrical interconnection pads and a lapping region conductively joining the first and second electrical interconnection pads, and
- periodic feature means for shaping the lapping region to provide an electrical conductance at the first and second electrical interconnection pads that varies periodically as the external surface is lapped.
Dependencies are inferred from the claim text.