METHOD FOR MANUFACTURING ANNULAR GLASS PLATE, METHOD FOR MANAFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK, METHOD FOR MANUFACTURING MAGNETIC DISK, ANNULAR GLASS PLATE, GLASS SUBSTE FOR MAGNETIC DISK, AND MANETIC DISK
LaoBiz.com profiles the Laos Patent “METHOD FOR MANUFACTURING ANNULAR GLASS PLATE, METHOD FOR MANAFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK, METHOD FOR MANUFACTURING MAGNETIC DISK, ANNULAR GLASS PLATE, GLASS SUBSTE FOR MAGNETIC DISK, AND MANETIC DISK” from open registry fields, filed by HOYA CORPORATION on 2020-07-31; current status: Awaiting formal examination. Identifiers include application No. P/822; DIP id LAP822; protection kind Patent - PCT National Phase. Key dates: publication 2026-02-20. Classification: B23K 26/354、B23K 26/53、C03B 29/00、C03B 29/02、C03B 33/04、C03B 33/09、C03C 19/00、G11B 5/73. Inventor(s)/designer(s): Shuhei AZUMA. Abstract hint: A method for manufacturing an annular glass plate that has an outer. Status labels may change after office actions; refresh or consult primary DIP data before commercial decisions.
P/822
Mark
Key facts
- Type
- Patent
- App. no.
P/822- Status
- Awaiting formal examination
- Applicant
- HOYA CORPORATION
- Agent
- Tilleke & Gibbins Lao Co.,Ltd
- Filing date
- 2020-07-31
- Publication
- 2026-02-20
- Protection kind
- Patent - PCT National Phase
- Nice / IPC classes
- B23K 26/354 · B23K 26/53 · C03B 29/00 · C03B 29/02 · C03B 33/04 · C03B 33/09 · C03C 19/00 · G11B 5/73 · G11B 5/84
- Goods / services
- —
Process
Steps follow the current public status-
Filed
-
Formal examination In progress
-
Substantive examination
-
Published
-
Granted
Related records
Linked from the LaoBiz.com company databaseSimilar Patent
Abstract
A method for manufacturing an annular glass plate that has an outer
circumferential edge surface, an inner circumferential edge surface, and a
thickness not larger than 0.6 mm includes processing for manufacturing an
annular glass plate by irradiating each of the outer circumferential edge surface
and the inner circumferential edge surface of an annular glass blank with a laser
beam to melt the outer circumferential edge surface and the inner
circumferential edge surface and form molten surfaces such that the molten
surfaces in the outer circumferential edge surface and the inner circumferential
edge surface each have an arithmetic average surface roughness Ra not larger
than 0.1 μm, and the surface roughness of the molten surface in the inner
circumferential edge surface becomes larger than the surface roughness of the
molten surface in the outer circumferential edge surface.
A method for manufacturing an annular glass plate that has an outer
circumferential edge surface, an inner circumferential edge surface, and a
thickness not larger than 0.6 mm includes processing for manufacturing an
annular glass plate by irradiating each of the outer circumferential edge surface
and the inner circumferential edge surface of an annular glass blank with a laser
beam to melt the outer circumferential edge surface and the inner
circumferential edge surface and form molten surfaces such that the molten
surfaces in the outer circumferential edge surface and the inner circumferential
edge surface each have an arithmetic average surface roughness Ra not larger
than 0.1 μm, and the surface roughness of the molten surface in the inner
circumferential edge surface becomes larger than the surface roughness of the
molten surface in the outer circumferential edge surface.
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