Novel DFH Bulge by Heat Sink Design
US-2025378847-A1 · Dec 11, 2025 · US
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Cha Ellis patents
Cha Ellis is listed as an inventor on 18 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Cha Ellis |
| Total patents | 18 |
| First publication | Mar 10, 2015 |
| Latest publication | Dec 11, 2025 |
Notable patents
Publications ranked by popularity score, then publication date.
DFH heater design
US-12387750-B1 · Aug 12, 2025 · US
Patterned reader shields for a cooler reader
US-11289116-B1 · Mar 29, 2022 · US
Air-bearing surface (ABS) design with side flow blocker for mitigating lube and hydrocarbon accumulation in hard disk drives (HDD)
US-11232812-B1 · Jan 25, 2022 · US
Protective shields under touchdown conditions for thermally assisted perpendicular magnetic recording
US-11211084-B1 · Dec 28, 2021 · US
Air-bearing surface (ABS) design to reduce particle scratch risk
US-11114121-B2 · Sep 7, 2021 · US
Air-Bearing Surface (ABS) Design to Reduce Particle Scratch Risk
US-2021035603-A1 · Feb 4, 2021 · US
TD detection with enhanced HDIs signal
US-10839843-B1 · Nov 17, 2020 · US
Air-bearing surface (ABS) design to reduce particle scratch risk
US-10811046-B2 · Oct 20, 2020 · US
High power ratio mode for TAMR drives
US-10679653-B1 · Jun 9, 2020 · US
Recent patents
Latest publications not already listed above.
Bumper pad design for TAMR drives
US-10629233-B1 · Apr 21, 2020 · US
Air-Bearing Surface (ABS) Design to Reduce Particle Scratch Risk
US-2020020355-A1 · Jan 16, 2020 · US
Dual write heater for slider surface topography control in double perpendicular magnetic recording (PMR) writers
US-10360935-B1 · Jul 23, 2019 · US
Air-bearing design for hydrocarbon and lube pick-up improvements in hard disk drive (HDD)
US-9940960-B2 · Apr 10, 2018 · US
ABS design with soft bumper pads (SBP) for mitigating media damage and thermal erasure in hard disk drives (HDD)
US-9892746-B1 · Feb 13, 2018 · US
Air-Bearing Design for Hydrocarbon and Lube Pick-Up Improvements in Hard Disk Drive (HDD)
US-2017345452-A1 · Nov 30, 2017 · US
Head DFH protrusion shape calibration by HDI sensor
US-9251829-B2 · Feb 2, 2016 · US
Touch down detection with HDI sensor DC mode
US-8976481-B1 · Mar 10, 2015 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Sae Magnetics Hk Ltd | 19 |
| Headway Tech Inc | 16 |
| Headway Technologies Inc | 2 |
| Ngan Siu Yin | 1 |
| Zeng Qinghua | 1 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| G11B5/6082 | 10 |
| G11B5/607 | 8 |
| G11B5/4826 | 7 |
| G11B2005/0021 | 6 |
| G11B5/6076 | 6 |