Glass Spacer and Hard Disc Drive Device
The following summary describes a Laos Patent titled “Glass Spacer and Hard Disc Drive Device”, filed by HOYA CORPORATION on 2018-10-01; current status: Registered. Identifiers include application No. P/839; DIP id LAP839; protection kind Patent - PCT National Phase. Key dates: publication 2024-11-22; grant 2024-11-18; expiry reference 2038-10-01. Classification: G11B 17/038、G11B 23/00、G11B 25/04、G11B 5/65. Inventor(s)/designer(s): EDA, Shinji, TAKANO Masao. Abstract hint: In order to suppress the occurrence of adhesion between magnetic disks and spacers when the. This prose is informational only and does not constitute legal advice, ownership proof or an infringement opinion.
P/839
Mark
Key facts
- Type
- Patent
- App. no.
P/839- Status
- Registered
- Applicant
- HOYA CORPORATION
- Agent
- Tilleke & Gibbins International Ltd
- Filing date
- 2018-10-01
- Reg. no.
P/839- Publication
- 2024-11-22
- Registration / grant
- 2024-11-18
- Expiry
- 2038-10-01
- Protection kind
- Patent - PCT National Phase
- Priority
- JP · 2017-191256 · 2017-09-29
- Nice / IPC classes
- G11B 17/038 · G11B 23/00 · G11B 25/04 · G11B 5/65
- Goods / services
- —
Process
Steps follow the current public status-
Filed
-
Formal examination
-
Substantive examination
-
Published
-
Granted
Related records
Linked from the LaoBiz.com company databaseSimilar Patent
Abstract
In order to suppress the occurrence of adhesion between magnetic disks and spacers when the
magnetic disks and the spacers are removed from a hard disk drive apparatus in which the
magnetic disks and the spacers are installed, a surface roughness Ra of a main surface of a ring-shaped glass spacer to be arranged in contact with a magnetic disk is set to be not larger than 1.0
pm, and an average inclination RAa of the main surface is set to be at least 0.02.
In order to suppress the occurrence of adhesion between magnetic disks and spacers when the
magnetic disks and the spacers are removed from a hard disk drive apparatus in which the
magnetic disks and the spacers are installed, a surface roughness Ra of a main surface of a ring-shaped glass spacer to be arranged in contact with a magnetic disk is set to be not larger than 1.0
pm, and an average inclination RAa of the main surface is set to be at least 0.02.
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