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US 6,482,505 B1Granted
Multi-layer texture layer
AssigneeKomag, Inc.
InventorsGerardo Bertero, Javier Wong, Tu Chen
Life of this patent
Estimating the term…
Abstract
A method for improving corrosion resistance while maximizing magnetic performance of a magnetic disk employed in data storage applications. The invention includes providing a substrate and forming a first layer above the substrate, the first layer having a first degree of abrasion resistance. The invention includes forming a second layer such as a Ni-containing layer above the first layer, the Ni-containing layer having a second degree of abrasion resistance lower than the first degree of abrasion resistance. The invention further includes forming grooves in the Ni-containing layer.
Claims46
A method for forming a magnetic disk for data storage, comprising:
- providing a substrate;
- forming a first layer above said substrate, said first layer having a first degree of abrasion resistance, said first layer being substantially amorphous;
- forming a second layer above said first layer, said second layer having a second degree of abrasion resistance lower than said first degree of abrasion resistance;
- and
- forming grooves in said second layer.
2 more elements
A magnetic disk for data storage, comprising:
- a substrate;
- a first layer disposed above said substrate, said first layer having a first degree of abrasion resistance, said first layer being substantially amorphous;
- and
- a second layer disposed above said first layer, said second layer having a second degree of abrasion resistance, said first degree of abrasion resistance being higher than said second degree of abrasion resistance, said second layer having grooves thereon.
1 more element
A magnetic disk drive for storing data, comprising:
- a magnetic disk including a substrate, said magnetic disk comprising a first layer disposed above said substrate, said first layer having a first degree of abrasion resistance, said first layer being substantially amorphous, and a second layer disposed above said first layer, said second layer having a second degree of abrasion resistance, said first degree of abrasion resistance being higher than said second degree of abrasion resistance, said second layer having grooves thereon, and a magnetic layer disposed above said second layer;
- a motor coupled to said magnetic disk for rotating said magnetic disk;
- a read-write head configured to be disposed for reading data from and writing data to said magnetic disk;
- an arm for holding said read-write head;
- and
- an actuator for moving said arm so that said read-write head may be placed over desired positions on said magnetic disk.
3 more elements
A method for forming a magnetic disk for data storage, comprising:
- providing a substrate;
- forming a first layer above said substrate, said first layer having a first degree of abrasion resistance, said first layer comprising niobium;
- forming a second layer above said first layer, said second layer having a second degree of abrasion resistance lower than said first degree of abrasion resistance;
- and
- forming grooves in said second layer.
2 more elements
A magnetic disk for data storage, comprising:
- a substrate;
- a first layer disposed above said substrate, said first layer having a first degree of abrasion resistance, said first layer comprising niobium;
- and
- a second layer disposed above said first layer, said second layer having a second degree of abrasion resistance, said first degree of abrasion resistance being higher than said second degree of abrasion resistance, said second layer having grooves thereon.
1 more element
A magnetic disk drive for storing data, comprising:
- a magnetic disk including a substrate, said magnetic disk comprising a first layer disposed above said substrate, said first layer having a first degree of abrasion resistance, said first layer comprising niobium, and a second layer disposed above said first layer, said second layer having a second degree of abrasion resistance, said first degree of abrasion resistance being higher than said second degree of abrasion resistance, said second layer having grooves thereon, and a magnetic layer disposed above said second layer;
- a motor coupled to said magnetic disk for rotating said magnetic disk;
- a read-write head configured to be disposed for reading data from and writing data to said magnetic disk;
- an arm for holding said read-write head;
- and
- an actuator for moving said arm so that said read-write head may be placed over desired positions on said magnetic disk.
3 more elements
A method for forming a magnetic disk for data storage, comprising:
- providing a substrate;
- forming a first layer above said substrate, said first layer having a first degree of abrasion resistance;
- forming a second layer above said first layer, said second layer having a second degree of abrasion resistance lower than said first degree of abrasion resistance, said second layer comprising nickel;
- and
- forming grooves in said second layer.
2 more elements
A magnetic disk for data storage, comprising:
- a substrate;
- a first layer disposed above said substrate, said first layer having a first degree of abrasion resistance;
- and
- a second layer disposed above said first layer, said second layer having a second degree of abrasion resistance, said second layer comprising nickel, said first degree of abrasion resistance being higher than said second degree of abrasion resistance, said second layer having grooves thereon.
1 more element
A magnetic disk drive for storing data, comprising:
- a magnetic disk including a substrate, said magnetic disk comprising a first layer disposed above said substrate, said first layer having a first degree of abrasion resistance, and a second layer disposed above said first layer, said second layer having a second degree of abrasion resistance, said second layer comprising nickel, said first degree of abrasion resistance being higher than said second degree of abrasion resistance, said second layer having grooves thereon, and a magnetic layer disposed above said second layer;
- a motor coupled to said magnetic disk for rotating said magnetic disk;
- a read-write head configured to be disposed for reading data from and writing data to said magnetic disk;
- an arm for holding said read-write head;
- and
- an actuator for moving said arm so that said read-write head may be placed over desired positions on said magnetic disk.
3 more elements
A method for forming a magnetic disk for data storage, comprising:
- providing a substrate;
- forming a first layer above said substrate, said first layer having a first degree of abrasion resistance;
- forming a second layer above said first layer, said second layer having a second degree of abrasion resistance lower than said first degree of abrasion resistance, wherein a surface of said second layer has an Ra roughness of 50 Å or less following formation thereof;
- and forming grooves in said second layer.
1 more element
A magnetic disk for data storage, comprising:
- a substate;
- a first layer disposed above said substrate, said first layer having a first degree of abrasion resistance;
- and
- a second layer disposed above said first layer, said second layer having a second degree of abrasion resistance, said first degree of abrasion resistance being higher than said second degree of abrasion resistance, wherein said second layer has an Ra roughness of 50 Å or less following formation thereof, said second layer having grooves thereon.
1 more element
A magnetic disk drive for storing data, comprising:
- a magnetic disk including a substrate, said magnetic disk comprising a first layer disposed above said substrate, said first layer having a first degree of abrasion resistance, and a second layer disposed above said first layer, said second layer having a second degree of abrasion resistance, wherein said second layer has an Ra roughness of 50 Å or less following formation thereof, said first degree of abrasion resistance being higher than said second degree of abrasion resistance, said second layer having grooves thereon, and a magnetic layer disposed above said second layer;
- a motor coupled to said magnetic disk for rotating said magnetic disk;
- a read-write head configured to be disposed for reading data from and writing data to said magnetic disk;
- an arm for holding said read-write head;
- and
- an actuator for moving said arm so that said read-write head may be placed over desired positions on said magnetic disk.
3 more elements
A method for forming a magnetic disk for data storage, comprising:
- providing a substrate;
- forming a first layer above said substrate, said first layer having a first degree of abrasion resistance;
- forming a second layer above said first layer, said second layer having a second degree of abrasion resistance lower than said first degree of abrasion resistance, said second layer formed to a thickness of approximately 500 Å or less;
- and
- forming grooves in said second layer.
2 more elements
A magnetic disk for data storage, comprising:
- a substrate;
- a first layer disposed above said substrate, said first layer having a first degree of abrasion resistance;
- and
- a second layer disposed above said first layer, said second layer having a second degree of abrasion resistance, said first degree of abrasion resistance being higher than said second degree of abrasion resistance, said second layer having a thickness of approximately 500 Å or less, said second layer having grooves thereon.
1 more element
A magnetic disk drive for storing data, comprising:
- a magnetic disk including a substrate, said magnetic disk comprising a first layer disposed above said substrate, said first layer having a first degree of abrasion resistance, and a second layer disposed above said first layer, said second layer having a second degree of abrasion resistance, said second layer having a thickness of approximately 500 Å or less, said first degree of abrasion resistance being higher than said second degree of abrasion resistance, said second layer having grooves thereon, and a magnetic layer disposed above said second layer;
- a motor coupled to said magnetic disk for rotating said magnetic disk;
- a read-write head configured to be disposed for reading data from and writing data to said magnetic disk;
- an arm for holding said read-write head;
- and
- an actuator for moving said arm so that said read-write head may be placed over desired positions on said magnetic disk.
3 more elements
Dependencies are inferred from the claim text.