Aluminum alloy substrate for magnetic disks, method for producing same, and magnetic disk using this aluminum alloy substrate for magnetic disks
US-2020377984-A1 · Dec 3, 2020 · US
Thin substrate built-in hard disk drive and base plate member for thin substrate built-in hard disk drive
US12033665B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12033665-B2 |
| Application number | US-202318303899-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 20, 2023 |
| Priority date | Oct 22, 2020 |
| Publication date | Jul 9, 2024 |
| Grant date | Jul 9, 2024 |
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.
An example thin substrate built-in hard disk drive includes a magnetic disk in a disk shape having a through-hole at the center, a spindle motor inserted into the through-hole of the magnetic disk and co-rotatably supporting the magnetic disk, and a base plate made of an aluminum alloy and supporting the spindle motor. The base plate has a metallographic structure in which a perimeter of a second phase particle having a longest diameter of 10 μm or more is 3 mm/mm 2 or more, and the number of second phase particles having a longest diameter of 500 μm or more is 0 particles/mm 2 .
First claim
Opening claim text (preview).
What is claimed is: 1. A base plate member made of an aluminum alloy, for a thin substrate built-in hard disk drive comprising a metallographic structure in which a perimeter of a second phase particle having a longest diameter of 10 μm or more is 3 mm/mm 2 or more, and a number of second phase particles having a longest diameter of 500 μm or more is 0 particles/mm 2 . 2. The base plate member according to claim 1 , wherein a thickness is 0.5 mm or more and 2.0 mm or less. 3. A thin substrate built-in hard disk drive comprising: a magnetic disk in a disk shape having a through-hole at the center; a spindle motor inserted into the through-hole of the magnetic disk and co-rotatably supporting the magnetic disk; and a base plate made of an aluminum alloy and supporting the spindle motor, wherein the base plate has a metallographic structure in which a perimeter of a second phase particle having a longest diameter of 10 μm or more is 3 mm/mm 2 or more, and a number of second phase particles having a longest diameter of 500 μm or more is 0 particles/mm 2 . 4. The thin substrate built-in hard disk drive according to claim 3 , wherein a thickness of the base plate is 0.5 mm or more and 2.0 mm or less.
Assignees
Inventors
Classifications
Cases · CPC title
Cabinets; Cases; Stands; Disposition of apparatus therein or thereon · CPC title
with silicon as the next major constituent · CPC title
Alloys based on aluminium · CPC title
with magnesium as the next major constituent · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12033665B2 cover?
- An example thin substrate built-in hard disk drive includes a magnetic disk in a disk shape having a through-hole at the center, a spindle motor inserted into the through-hole of the magnetic disk and co-rotatably supporting the magnetic disk, and a base plate made of an aluminum alloy and supporting the spindle motor. The base plate has a metallographic structure in which a perimeter of a seco…
- Who is the assignee on this patent?
- Uacj Corp, Furukawa Electric Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G11B25/043. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 09 2024 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).