Magnetic disk comprising a first carbon overcoat having a high SP3 content and a second carbon overcoat having a low SP3 content

A method for modifying a manufacturing process, said manufacturing process comprising providing a carbon-based protective overcoat on a magnetic disk using a set of parameters, said method comprising modifying said process such that instead of providing said carbon-based protective overcoat on said magnetic disk using said set of parameters, the following acts are performed:

• depositing a first carbon layer on said magnetic disk, said first carbon layer having an SP3 content of at least about 70%;
• and
• depositing a second carbon layer using substantially said set of parameters, said second carbon layer being less than or equal to about 1.0 nm thick,
• and wherein after said depositing of said first and second carbon layers using said modified process, a lubricant layer is applied to said second carbon layer.

A method for modifying a manufacturing process, said manufacturing process comprising providing a carbon-based protective overcoat on a magnetic disk using a set of parameters, said method comprising modifying said process such that instead of providing said carbon-based protective overcoat on said magnetic disk using said set of parameters, the following acts are performed:

• depositing a first carbon layer on said magnetic disk, said first carbon layer comprising predominantly SP3 carbon;
• and
• depositing a flash layer of carbon using said set of parameters,
• and wherein after said depositing of said first and flash carbon layers using said modified process, a lubricant layer is applied to said flash layer, and wherein said flash layer has a thickness less than about 1 nm.

A method for modifying a manufacturing process, said manufacturing process comprising providing a carbon-based protective overcoat on a magnetic disk using a set of parameters, said method comprising modifying said process such that instead of providing said carbon-based protective overcoat on said magnetic disk using said set of parameters, the following acts are performed:

• depositing a first carbon layer on said magnetic disk, said first carbon layer comprising predominantly SP3 carbon;
• and
• depositing a flash layer of carbon using said set of parameters,
• and wherein after said depositing of said first and flash carbon layers using said modified process, a lubricant layer is applied to said flash layer, and wherein said flash layer comprises at least one material selected from the group consisting of hydrogen and nitrogen.

A method for modifying a manufacturing process, said manufacturing process comprising providing a carbon-based protective overcoat on a magnetic disk, said carbon-based overcoat comprising one component of a head-disk interface, said method comprising modifying said process such that instead of providing said carbon-based protective overcoat on said magnetic disk, the following acts are performed:

• depositing a first carbon layer on said magnetic disk, said first carbon layer comprising predominantly SP3 carbon;
• and
• depositing a second carbon layer that cooperates with at least one second component of said head-disk interface with substantially the same effectiveness as said protective overcoat,
• wherein said second component of said head-disk interface comprises one or more of:
• a lubricant applied above said second carbon layer, a texture formed on said disk, and a slider having a read element thereon, wherein said second carbon layer is amorphous.

A method for modifying a manufacturing process, said manufacturing process comprising providing a carbon-based protective overcoat on a magnetic disk using a set of parameters, said method comprising modifying said process such that instead of providing said carbon-based protective overcoat on said magnetic disk using said set of parameters, the following acts are performed:

• depositing a first carbon layer on said magnetic disk, said first carbon layer comprising predominantly SP3 carbon;
• and
• depositing a flash layer of carbon using said set of parameters,
• and wherein after said depositing of said first and flash carbon layers using said modified process, a lubricant layer is applied to said flash layer, wherein said flash layer of carbon is amorphous.