Back to results
US 6,724,715 B1Granted
Optical recording medium having optical reaction layer
AssigneeLG Electronics Inc.
InventorsJin Hong Kim, Chul Park
Life of this patent
Estimating the term…
Abstract
An optical recording medium improves recording density at a simple structure by forming an optical reaction layer, which transmits a laser beam at a predetermined temperature, on or below of a recording layer.
Claims23
An optical recording medium comprising:
- a recording layer for recording information through a laser beam;
- and
- an optical reaction layer formed on or below the recording layer,
- wherein the optical reaction layer is melted at a predetermined temperature or causes optical change to vary a refractive index, thereby transmitting the laser beam through the melted area or the optically changed area of the optical reaction layer, and
- wherein the laser beam is transmitted through a window, which has a smaller diameter than a spot size of the laser beam and is formed on the melted area or the optically changed area of the optical reaction layer.
2 more elements
An optical recording medium comprising:
- a substrate;
- a first dielectric layer formed on the substrate;
- an optical reaction layer formed on the first dielectric layer, for being melted at a predetermined temperature or causing optical reaction to vary a refractive index, thereby transmitting a laser beam through a window, which has a smaller diameter than a spot size of the laser beam;
- a second dielectric layer formed on the optical reaction layer;
- a recording layer formed on the second dielectric layer, for recording information by the laser beam;
- and
- a passivation layer formed on the recording layer.
4 more elements
An optical recording medium comprising:
- a substrate;
- a reflecting layer formed on the substrate;
- a recording layer formed on the reflecting layer, for recording information by a laser beam;
- a first passivation layer formed on the recording layer;
- an optical reaction layer formed on the first passivation layer, for being melted at a predetermined temperature or causing optical reaction to vary a refractive index, thereby transmitting the laser beam through a window, which has a smaller diameter than a spot size of the laser beam;
- and
- a second passivation layer formed on the optical reaction layer.
4 more elements
An optical recording medium comprising:
- a recording layer for recording information through a laser beam;
- and
- an optical reaction layer formed on or below the recording layer,
- wherein the optical reaction layer is melted at a predetermined temperature or causes optical change to vary a refractive index, thereby transmitting the laser beam;
- and
- wherein the optical reaction layer is melted at a temperature of 300˜800° C.
3 more elements
An optical recording medium comprising:
- a recording layer for recording information through a laser beam;
- an optical reaction layer formed on or below the recording layer, wherein the optical reaction layer is melted at a predetermined temperature or causes optical change to vary a refractive index, thereby transmitting the laser beam;
- and
- a reproducing layer formed between the optical reaction layer and the recording layer to reproduce information of the recording layer.
1 more element
An optical recording medium comprising:
- a recording layer to record information thereon using a light beam;
- and
- an optical reaction layer over the recording layer,
- wherein when the light beam impinges on the optical reaction layer, a window is created in the optical reaction layer and the window reduces a spot size of the light beam to allow passing of a part of the light beam to the recording layer and to prevent passing of another part of the light beam to the recording layer.
1 more element
Dependencies are inferred from the claim text.