Issued Patents 2011
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8080479 | Plasma process uniformity across a wafer by controlling a variable frequency coupled to a harmonic resonator | Kenneth S. Collins, Hiroji Hanawa, Kartik Ramaswamy, Douglas A. Buchberger, Jr., Shahid Rauf +10 more | 2011-12-20 |
| 8076247 | Plasma process uniformity across a wafer by controlling RF phase between opposing electrodes | Kenneth S. Collins, Hiroji Hanawa, Kartik Ramaswamy, Douglas A. Buchberger, Jr., Shahid Rauf +10 more | 2011-12-13 |
| 8043997 | Lost circulation material formulation and method of use | Donald L. Whitfill, Cindy C. Fang | 2011-10-25 |
| 8018164 | Plasma reactor with high speed plasma load impedance tuning by modulation of different unmatched frequency sources | Steven C. Shannon, Kartik Ramaswamy, Daniel J. Hoffman, Kenneth S. Collins | 2011-09-13 |
| 8002945 | Method of plasma load impedance tuning for engineered transients by synchronized modulation of an unmatched low power RF generator | Steven C. Shannon, Kartik Ramaswamy, Daniel J. Hoffman, Kenneth S. Collins | 2011-08-23 |
| 7994872 | Apparatus for multiple frequency power application | Steven C. Shannon, Jang-Gyoo Yang, Kartik Ramaswamy, James P. Cruse | 2011-08-09 |
| 7968469 | Method of processing a workpiece in a plasma reactor with variable height ground return path to control plasma ion density uniformity | Kenneth S. Collins, Hiroji Hanawa, Kartik Ramaswamy, Douglas A. Buchberger, Jr., Shahid Rauf +10 more | 2011-06-28 |
| 7967944 | Method of plasma load impedance tuning by modulation of an unmatched low power RF generator | Steven C. Shannon, Kartik Ramaswamy, Daniel J. Hoffman, Kenneth S. Collins | 2011-06-28 |
| 7955986 | Capacitively coupled plasma reactor with magnetic plasma control | Daniel J. Hoffman, Jang-Gyoo Yang, Heeyeop Chae, Michael Barnes, Tetsuya Ishikawa +1 more | 2011-06-07 |
| 7884025 | Plasma process uniformity across a wafer by apportioning ground return path impedances among plural VHF sources | Kenneth S. Collins, Hiroji Hanawa, Kartik Ramaswamy, Douglas A. Buchberger, Jr., Shahid Rauf +10 more | 2011-02-08 |
| 7879731 | Improving plasma process uniformity across a wafer by apportioning power among plural VHF sources | Kenneth S. Collins, Hiroji Hanawa, Kartik Ramaswamy, Douglas A. Buchberger, Jr., Shahid Rauf +10 more | 2011-02-01 |