Method for fabricating nanostructured optical elements
US-12555604-B2 · Feb 17, 2026 · US
Disk-shaped information recording medium, disk cartridge, and information recording/reproducing apparatus
US8930974B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8930974-B2 |
| Application number | US-201313960814-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 7, 2013 |
| Priority date | Aug 9, 2012 |
| Publication date | Jan 6, 2015 |
| Grant date | Jan 6, 2015 |
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Abstract
Official abstract text for this publication.
The disk-shaped information recording medium having an outer diameter and an inner diameter comprises a substrate having a predetermined thickness, a first side that is one side of the substrate, a second side that is the other side of the substrate, a cylindrical portion forming a through hole formed at a center of the substrate, and a thin portion formed so as to surround an outer diameter of the cylindrical portion. The thin portion is thinner than the predetermined thickness and includes a non-inclined surface and an inclined surface formed on an outer diameter side of the non-inclined surface. The inclined surface is inclined at a predetermined angle to the non-inclined surface and is larger than the non-inclined surface in the thin portion.
First claim
Opening claim text (preview).
What is claimed: 1. A disk-shaped information recording medium having an outer diameter and an inner diameter, the information recording medium comprising: a substrate having a predetermined thickness; a first side that is one side of the substrate; a second side that is the other side of the substrate; a cylindrical portion forming a through hole formed at a center of the substrate; a thin portion formed so as to surround an outer diameter of the cylindrical portion, the…
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Classifications
Physics · mapped topic
Physics · mapped topic
- G11B7/24047Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8930974B2 cover?
- The disk-shaped information recording medium having an outer diameter and an inner diameter comprises a substrate having a predetermined thickness, a first side that is one side of the substrate, a second side that is the other side of the substrate, a cylindrical portion forming a through hole formed at a center of the substrate, and a thin portion formed so as to surround an outer diameter of…
- Who is the assignee on this patent?
- Panasonic Corp
- What technology area does this patent fall under?
- Primary CPC classification G11B7/24047. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 06 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).