Ellis Cha
71Patents
12h-index
41Co-inventors
84Inventor score
Filing activity: Dec 19, 1994 → Jun 10, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7064928B2 | Method and apparatus for providing an additional ground pad and electrical connection for grounding a magnetic recording head | Emerging Cross-Sectional Technologies | 54 | Expired |
| US7391594B2 | Apparatus for providing an additional ground pad and electrical connection for grounding a magnetic recording head | Emerging Cross-Sectional Technologies | 45 | Active |
| US7342750B2 | Method for providing electrical crossover in a laminated structure | Electricity | 44 | Expired |
| US7046473B2 | Method and apparatus for active fly height control with heating and electrical charge | Physics | 30 | Expired |
| US5497085A | Method for determining an outer diameter rolloff in a process for making magnetic disks | Physics | 23 | Expired |
| US5985163A | Partially etched protective overcoat for a disk drive slider | Physics | 18 | Expired |
| US8184405B1 | Air-bearing slider design for sub-nanometer clearance in hard disk drive (HDD) | Physics | 18 | Active |
| US6034842A | Subambient pressure slider for constant flying height | Physics | 16 | Expired |
| US7782569B2 | Magnetic recording head and media comprising aluminum oxynitride underlayer and a diamond-like carbon overcoat | Emerging Cross-Sectional Technologies | 15 | Active |
| US5677812A | Air bearing slider with variable sub-ambient pressure control | Physics | 14 | Expired |
| US7440219B2 | Non-contact measurement of slider fly height by electrostatic force | Physics | 14 | Active |
| US7679857B2 | Non-contact measurement of slider fly height by electrostatic force | Physics | 13 | Active |
| US6014288A | Partially etched protective overcoat for a disk drive slider | Physics | 12 | Expired |
| US5677808A | System and method for controlling a seek operation in a disk drive | Physics | 11 | Expired |
| US7961433B2 | Air-bearing design for hard disk drive (HDD) applications | Physics | 11 | Active |
| US8976481B1 | Touch down detection with HDI sensor DC mode | Physics | 10 | Active |
| US10360935B1 | Dual write heater for slider surface topography control in double perpendicular magnetic recording (PMR) writers | Physics | 10 | Active |
| US5739981A | Magnetic head sub-ambient air pressure slider for a disk drive device or the like | Physics | 10 | Expired |
| US8014104B2 | Magnetic head/disk with transition metal oxynitride adhesion/corrosion barrier and diamond-like carbon overcoat bilayer | Emerging Cross-Sectional Technologies | 9 | Active |
| US7760468B2 | Air-bearing design with particle rejection features | Physics | 9 | Expired |
| US7042670B2 | Method for adjusting flying height of magnetic heads using an electrical charge through an electrical pad on the slider | Physics | 8 | Expired |
| US7327535B2 | Hybrid coating for magnetic heads | Emerging Cross-Sectional Technologies | 8 | Expired |
| US7969685B2 | ABS design for dynamic flying height (DFH) applications | Physics | 8 | Active |
| US8576671B1 | ABS design with multiple heaters | Physics | 8 | Active |
| US7357875B2 | Hybrid coating for magnetic heads | Emerging Cross-Sectional Technologies | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.