Method for providing a magnetic recording transducer using a chemical buffer
US-9196283-B1 · Nov 24, 2015 · US
Manufacturing method of glass substrate for magnetic disk, manufacturing method of glass blank, glass substrate for magnetic disk, and glass blank
US8973404B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8973404-B2 |
| Application number | US-201113379803-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 31, 2011 |
| Priority date | Mar 31, 2010 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 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.
There are provided, a method for efficiently manufacturing a glass substrate for magnetic disk in which the degree of surface irregularity of the principal surface is suppressed, and the glass substrate for magnetic disk. When manufacturing a glass substrate for magnetic disk including a pair of principal surfaces, a glass blank is formed by pressing molten glass or softened glass with planar press forming surfaces of dies in such a way that the molten glass or the softened glass is sandwiched from the both sides. Temperature condition is equalized around the pair of principal surfaces of the glass blank during the pressing.
First claim
Opening claim text (preview).
The invention claimed is: 1. A manufacturing method of a glass substrate for a magnetic disk including a pair of principal surfaces, the method comprising: forming a glass blank by performing press forming to molten glass or softened glass with planar press forming inner surfaces of a pair of dies in such a way that the molten glass or the softened glass is sandwiched between the inner surfaces from both sides in a horizontal direction while maintaining a temperature difference be…
Assignees
Inventors
Classifications
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- G11B5/8404Primary
Physics · 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 US8973404B2 cover?
- There are provided, a method for efficiently manufacturing a glass substrate for magnetic disk in which the degree of surface irregularity of the principal surface is suppressed, and the glass substrate for magnetic disk. When manufacturing a glass substrate for magnetic disk including a pair of principal surfaces, a glass blank is formed by pressing molten glass or softened glass with planar p…
- Who is the assignee on this patent?
- Eda Shinji, Isono Hideki, Hoya Corp
- What technology area does this patent fall under?
- Primary CPC classification G11B5/8404. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 10 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).