# US 8,465,853 B2 · Glassy metal disk

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- Number: US 8,465,853 B2
- Document ID: US8465853B2
- Status: Granted
- Kind: B2
- Application number: 10/866,326
- Filed: 2004-06-09
- Published: 2005-09-29
- Granted: 2013-06-18
- Earliest claimed: 2004-03-24
- Assignees: Marvell World Trade Ltd.
- Applicants: Sehat Sutardja
- Inventors: Sehat Sutardja
- Web page: https://patentgrep.com/patent/US8465853B2

## CPC

- G11B 5/73917: {Metallic substrates, i.e. elemental metal or metal alloy substrates}
- Y10T 428/12243: Disk
- Y10T 428/12465: having magnetic properties, or preformed fiber orientation coordinate with shape
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A hard drive platter comprises a substrate that includes glassy metal. At least one magnetic layer is arranged on the substrate. The glassy metal includes at least three of zirconium, titanium, nickel, copper, and/or beryllium. A perpendicular recording system comprises the hard drive platter. A hard disk drive comprises the hard drive platter. A computer comprises the hard disk drive. A digital camera comprises the hard drive platter. A portable media player comprises the hard drive platter. An insulating layer and/or an Aluminum layer may be located between the glassy metal substrate and the at least one magnetic layer.

## Claims

### Claim 1

A hard drive platter comprising:
a substrate comprising a first surface, a second surface, and a glassy metal layer, wherein the glassy metal layer provides a main carrier of (i) the substrate, and (ii) the hard drive platter, and wherein the glassy metal layer includes each of zirconium, titanium, nickel, copper, and beryllium; and
at least one magnetic layer arranged on at least one of the first surface or the second surface.

### Claim 2 (depends on 1)

The hard drive platter of claim 1, wherein the glassy metal layer includes three or more elements differing in atomic size by at least 12%.

### Claim 3 (depends on 1)

A perpendicular recording system comprising the hard drive platter of claim 1.

### Claim 4 (depends on 1)

A hard disk drive comprising the hard drive platter of claim 1.

### Claim 5 (depends on 4)

A computer comprising the hard disk drive of claim 4.

### Claim 6 (depends on 4)

A digital camera comprising the hard disk drive of claim 4.

### Claim 7 (depends on 4)

A portable media player comprising the hard disk drive of claim 4.

### Claim 8 (depends on 1)

The hard driver platter of claim 1, wherein the substrate consists of a single layer.

### Claim 9

A hard drive platter comprising:
a substrate comprising a first surface and a second surface, wherein the substrate consists of a single layer, wherein the single layer includes glassy metal, and wherein the glassy metal includes each of zirconium, titanium, nickel, copper, and beryllium; and
at least one magnetic layer arranged on at least one of the first surface or the second surface.

### Claim 10

A hard driver platter comprising:
a substrate comprising a glassy metal layer, wherein the glassy metal layer provides a main carrier of (i) the substrate, and (ii) the hard drive platter, wherein the glassy metal layer includes each of zirconium, titanium, nickel, copper, and beryllium, and wherein the substrate comprises
a first surface, and
a second surface (i) opposing the first surface, and (ii) substantially located in a single plane;
a strengthening layer having a third surface and a fourth surface, wherein the third surface is arranged on the first surface; and
at least one magnetic layer arranged on the fourth surface.

### Claim 11 (depends on 10)

The hard driver platter of claim 10, wherein the strengthening layer includes glassy metal.

### Claim 12 (depends on 10)

The hard driver platter of claim 10, wherein the substrate consists of a single layer.

### Claim 13

A hard drive platter comprising:
a substrate comprising a first surface, a second surface, and a glassy metal layer, wherein the glassy metal layer provides a base material layer of (i) the substrate, and (ii) the hard drive platter, and wherein the glassy metal layer includes each of zirconium, titanium, nickel, copper, and beryllium; and
at least one magnetic layer arranged on at least one of the first surface or the second surface,
wherein the hard drive platter includes an opening configured to receive a hard disk drive spindle.

### Claim 14 (depends on 13)

The hard driver platter of claim 13, further comprising a strengthening layer arranged on at least one of the first surface, the second surface, or the at least one magnetic layer.

### Claim 15 (depends on 14)

The hard driver platter of claim 14, wherein the strengthening layer includes glassy metal.

### Claim 16 (depends on 1)

The hard drive platter of claim 1, wherein the substrate is rigid.

### Claim 17

A hard drive platter comprising:
a substrate comprising a first surface and a second surface, wherein the substrate consists of glassy metal, and wherein the glassy metal includes each of zirconium, titanium, nickel, copper, and beryllium; and
at least one magnetic layer arranged on at least one of the first surface or the second surface.