摘要:
A magnetic sensor includes a reference layer having a first magnetization direction and a free layer assembly having an effective magnetization direction substantially perpendicular to the first magnetization direction and substantially perpendicular to a plane of each layer of the free layer assembly. A spacer layer is between the reference layer and the free layer, and a signal enhancement layer is exchange coupled to the free layer assembly on a side opposite the spacer layer.
摘要:
A magnetic sensor includes a reference layer having a first magnetization direction and a free layer assembly having an effective magnetization direction substantially perpendicular to the first magnetization direction and substantially perpendicular to a plane of each layer of the free layer assembly. A spacer layer is between the reference layer and the free layer, and a signal enhancement layer is exchange coupled to the free layer assembly on a side opposite the spacer layer.
摘要:
A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element has a first edge closest to the main pole and a second edge furthest from the main pole. Permeability of the magnetic element increases from the first edge to the second edge.
摘要:
A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element has a first edge closest to the main pole and a second edge furthest from the main pole. Permeability of the magnetic element increases from the first edge to the second edge.
摘要:
Management of multiple types of empty carriers in automated material handling systems. In one embodiment, an automated material handling system (AMHS) includes a plurality of material carriers including a plurality of empty carriers classified into two or more types and one or more stock areas, each including a plurality of bins for storing material carriers. Each stock area is associated with one or more thresholds for each empty carrier type. The AMHS further includes a control system coupled to a first one of the stock areas for computing an empty percentage for each empty carrier type. The empty percentage for a particular empty carrier type is the percentage of bins of the first one stock area which contain empty carriers of the particular type. The AMHS also includes a transportation system responsive to the control system for selectively moving an empty carrier of a certain carrier type between a staging area and the first stock area based on a comparison of the empty percentage for the certain carrier type to the one or more thresholds of the first stock area for the certain carrier type.
摘要:
A read/write head includes a bottom shield and a shared shield. The shared shield includes a first domain and a plurality of closure domains. The read/write head also includes a magnetoresistive sensor deposited adjacent an air bearing surface between the bottom shield and the shared shield. The magnetoresistive sensor includes a magnetoresistor aligned with the first domain. Non-magnetic material separates the magnetoresistive sensor from the bottom shield and the shared shield. The shared shield includes a shaped feature that defines an unambiguous direction of magnetization for the first domain.
摘要:
A giant magnetoresistive spin valve for use in a magnetic read head includes a ferromagnetic free layer and a multilayer cap layer. The free layer has a rotatable magnetic moment. The multilayer cap layer is positioned adjacent to the free layer for increasing electron specular scattering of the free layer.
摘要:
A test simulation circuit includes a simulated read/write head with a magnet shield and a magnetoresistive sensor exposed at a lapped surface. The test simulation circuit also includes first and second electrical test path connected respectively to the magnet shield and the magnetoresistive sensor. The second electrical test path is electrically isolated from the first electrical test path.
摘要:
A computer controlled manufacturing arrangement and method for selecting between multiple paths for transporting cassettes between processing locations. The manufacturing arrangement includes a plurality of stockers interconnected with tracks on which cassettes are carried on vehicles. A first and second stocker are interconnected by at least a first path and a second path formed by the tracks, and a cassette can be transported from the first to the second stocker via either of the two paths. A plurality of robotic arrangements are configured to transfer cassettes between the stockers and the vehicles. A data processing system is coupled to the robotic arrangements and configured and arranged to maintain an historical record of codes indicative of periods of time expended in transporting cassettes from the first stocker to the second stocker via the first path and second path, respectively. When a cassette is to be transported from the first stocker to the second stocker, the data processing system determines, as a function of the historical record of codes associated with the paths, which of the first or second paths is more likely to result in a lesser period of time in transporting the cassette, and selects one of the first or second paths according to which path is more likely to result in a lesser period of time in transporting the cassette. The robotic arrangement is then instructed to load the cassette on the vehicle of the selected path.
摘要:
Methods and systems for managing test wafers an automated material handling system are provided. Test material is classified into a plurality of classes. A time profile for each class of test material for a time period is determined and the test material is placed into cassettes based on the determined time profile for each class. When a request to pick up a particular group of a test material class is received, a cassette is identifying for picking up the particular group based on the contents of the cassette.