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US 2003/0198834 A1Published application
High modulus and high damping plastic composite disc substrate for improved servo control by injection and co-injection molding
AssigneeSeagate Technology LLC
InventorsSTANLEY DALE VIERK, HONG YING WANG
Life of this patent
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Abstract
The field of this invention is data storage systems. More particularly, the invention pertains to plastic and plastic composite substrates used as discs in magneto-optical (MO) and magnetic recording (MR) data storage systems.
Claims20
A substrate for use in is a data storage system, comprising:
- at least one plastic or plastic composite material;
- said plastic or plastic composite material exhibiting a modulus of about 350 kpsi or greater.
A substrate for use in is a data storage system, comprising:
- at least one core layer made of a plastic or plastic composite material;
- and
- at least one skin layer made of a plastic or plastic composite material, and formed atop at least one surface of said core layer, wherein at least one of said core or skin layers exhibit a modulus of about 350 kpsi or greater.
An apparatus, comprising:
- a disk drive spindle motor;
- and
- at least one data storage disk mounted on said disk drive spindle having means for exhibiting a modulus of about 350 kpsi or greater.
Dependencies are inferred from the claim text.