Hybrid-guided block copolymer assembly
US-2015356989-A1 · Dec 10, 2015 · US
Method for manufacturing magnetic recording medium
US8993071B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993071-B2 |
| Application number | US-28853808-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 20, 2008 |
| Priority date | Nov 8, 2007 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Embodiments of the present invention provide a manufacturing method that can form a track guide separation area of a magnetic disk substrate constituting a patterned medium represented by a discrete track medium or bit patterned medium suitable for high recording density, uniformly on the whole surface of the magnetic disk substrate, and accurately according to the mask. According to one embodiment, a soft magnetic film, an under coating film, and a magnetic film are formed on a substrate. A mask having an arbitrary pattern shape provided for forming the track guide separation area in the magnetic film is formed on the magnetic film, and the track guide separation area is formed by irradiating ions and electrons onto the surface of the magnetic film and applying an intermittent voltage to the substrate, thereby non-magnetizing the area irradiated.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for manufacturing a magnetic recording medium characterized by including: forming a soft magnetic film and an undercoat film on a top part of a substrate; forming at least a magnetic film and a protection film above the undercoat film; forming, on the protection film, a mask having a pattern to form a non-magnetic area in the magnetic film; irradiating the protection film having the mask formed thereon with ions and electrons and applying an i…
Assignees
Inventors
Classifications
Chemistry & Metallurgy · mapped topic
- G11B5/855Primary
Physics · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8993071B2 cover?
- Embodiments of the present invention provide a manufacturing method that can form a track guide separation area of a magnetic disk substrate constituting a patterned medium represented by a discrete track medium or bit patterned medium suitable for high recording density, uniformly on the whole surface of the magnetic disk substrate, and accurately according to the mask. According to one embodi…
- Who is the assignee on this patent?
- Inaba Hiroshi, Kanai Hiroshi, Yasui Nobuto, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification G11B5/855. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 31 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).