Invention Grant
- Patent Title: Air-bearing design for hydrocarbon and lube pick-up improvements in hard disk drive (HDD)
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Application No.: US15162704Application Date: 2016-05-24
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Publication No.: US09940960B2Publication Date: 2018-04-10
- Inventor: Ellis Cha , Sindy Yeung , Penny Wan Ting Looi , Ben Kwun Pan Ng
- Applicant: SAE Magnetics (H.K.) Ltd. , Headway Technologies, Inc.
- Applicant Address: HK Shatin, N.T. US CA Milpitas
- Assignee: SAE Magnetics (HK) Ltd.,Headway Technologies, Inc.
- Current Assignee: SAE Magnetics (HK) Ltd.,Headway Technologies, Inc.
- Current Assignee Address: HK Shatin, N.T. US CA Milpitas
- Agency: Saile Ackerman LLC
- Agent Stephen B. Ackerman
- Main IPC: G11B5/60
- IPC: G11B5/60

Abstract:
A slider design for a hard disk drive (HDD) features an air-bearing surface (ABS) topography with arrays of micro-dots formed on bases of a multiplicity of cavities at different depths. The design eliminates the accumulation of hydrocarbons (e.g., spindle oil and disk lubricant) deposits in regions of air stagnation within the cavities where backflows and foreflows of air meet and cancel during HDD operation. The micro-dots are small raised regions of various shapes having sizes and spacings in the range between 2 and 100 microns and, in a preferred embodiment, heights of 0.15 microns above the cavity bases.
Public/Granted literature
- US20170345452A1 Air-Bearing Design for Hydrocarbon and Lube Pick-Up Improvements in Hard Disk Drive (HDD) Public/Granted day:2017-11-30
Information query
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