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Sony patents tape to clean high-density magnetic recording heads

Sony describes a cleaning tape designed to remove debris from the tiny read/write heads used in high-density magnetic storage. The tape features a specific magnetic layer and underlayer thickness to ensure it is smooth enough to avoid damaging delicate equipment while still being abrasive enough to clean effectively.

Why it mattersThis filing is interesting to hardware engineers and data storage specialists because it addresses the maintenance challenges of future high-density magnetic media, though it is unlikely to impact general consumers directly.

In the filing’s own words

An object of the present technology is to provide a cleaning tape with a high cleaning power that can be used for next-generation media having a small bit size. The present technology provides a cleaning tape including a magnetic layer and an underlayer in this order, in which an average thickness of the underlayer is 1.60 μm or more, a surface roughness Rab of a surface of the magnetic layer is 2.9 nm or less, and an abrasivity of 50 reciprocations with respect to an AlFeSil prism is 65 μm or less, and an abrasivity of 50 reciprocations to 100 reciprocations with respect to the AlFeSil prism is 25 μm or more. The magnetic layer can contain a magnetic powder. The magnetic powder can be a barium ferrite magnetic powder.

What exactly they claim (claim 1)

1. A cleaning tape comprising: a magnetic layer; and an underlayer in this order, wherein an average thickness of the underlayer is 1.60 μm or more, a surface roughness Rab of a surface of the magnetic layer is 2.9 nm or less, and an abrasivity of 50 reciprocations with respect to an AlFeSil prism is 65 μm or less, and an abrasivity of 50 reciprocations to 100 reciprocations with respect to the AlFeSil prism is 25 μm or more.

Facts

Company
Sony (Sony Group Corporation)
Official title
CLEANING TAPE
Publication number
US20260284823A1
Application number
19478185
Filed
May 9, 2024
Published
Sep 24, 2026
Inventors
7
Claims
15

Classified under

B24B 27/033 Operations & transport
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.