# US 8,465,823 B1 · Optical media having transparent back side coating

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- Number: US 8,465,823 B1
- Document ID: US8465823B1
- Status: Granted
- Kind: B1
- Application number: 13/334,179
- Filed: 2011-12-22
- Published: 2013-06-27
- Granted: 2013-06-18
- Earliest claimed: 2011-12-22
- Assignees: Oracle International Corporation
- Applicants: Eui Kyoon Kim
- Inventors: Eui Kyoon Kim
- Web page: https://patentgrep.com/patent/US8465823B1

## CPC

- G11B 7/252: of layers other than recording layers
- Y10T 428/21: Circular sheet or circular blank
- 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

An optical media such as an optical tape includes a substrate, a pre-format layer on one side of the substrate, and a back side coating. The back side coating is optically transparent and is electrically conductive. One of the substrate and the pre-format layer is between the back side coating and the other one of the substrate and the pre-format layer.

## Claims

### Claim 1

An optical media comprising:
a substrate;
a pre-format layer on the substrate on one side of the substrate; and
a back side coating, wherein the back side coating is optically transparent at least in the ultraviolet range and is electrically conductive;
wherein the pre-format layer is between the back side coating and the substrate with the back side coating being positioned apart from the pre-format layer on the same side of the substrate.

### Claim 2 (depends on 1)

The optical media of claim 1 wherein:
the back side coating includes an optically transparent and electrically conductive oxide.

### Claim 3 (depends on 2)

The optical media of claim 2 wherein:
the oxide includes at least one of indium tin oxide (ITO), fluoride doped tin oxide (FTO), and doped zinc oxide.

### Claim 4 (depends on 1)

The optical media of claim 1 wherein:
the back side coating includes a metalized film.

### Claim 5 (depends on 1)

The optical media of claim 1 further comprising:
a recording layer, wherein the recording layer is on the back side coating and is between the back side coating and the pre-format layer.

### Claim 6 (depends on 1)

The optical media of claim 1 wherein:
the optical media is an optical tape.