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Or, CA
David T. Or, Santa Clara, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20090104782 | SELECTIVE ETCHING OF SILICON NITRIDE - Methods for etching dielectric layers comprising silicon and nitrogen are provided herein. In some embodiments, such methods may include providing a substrate having a dielectric layer comprising silicon and nitrogen disposed thereon, forming reactive species from a process gas comprising hydrogen (H | 04-23-2009 |
| 20090218324 | DIRECT REAL-TIME MONITORING AND FEEDBACK CONTROL OF RF PLASMA OUTPUT FOR WAFER PROCESSING - A method and apparatus for controlling power output of a capacitatively-coupled plasma are provided. A detector is disposed on the power delivery conduit carrying power to one electrode to detect fluctuations in power output to the electrode. The detector is coupled to a signal generator, which converts the RF input signal to a constant control signal. A controller adjusts power input to the RF generator by comparing the control signal to a reference. | 09-03-2009 |
| 20100099263 | NF3/H2 REMOTE PLASMA PROCESS WITH HIGH ETCH SELECTIVITY OF PSG/BPSG OVER THERMAL OXIDE AND LOW DENSITY SURFACE DEFECTS - A method and apparatus for selectively etching doped semiconductor oxides faster than undoped oxides. The method comprises applying dissociative energy to a mixture of nitrogen trifluoride and hydrogen gas remotely, flowing the activated gas toward a processing chamber to allow time for charged species to be extinguished, and applying the activated gas to the substrate. Reducing the ratio of hydrogen to nitrogen trifluoride increases etch selectivity. A similar process may be used to smooth surface defects in a silicon surface. | 04-22-2010 |
| 20100101602 | PLASMA CLEANING APPARATUS AND METHOD - Embodiments of the present invention generally include an apparatus for plasma cleaning and a method for plasma cleaning. Periodically, a PVD chamber may need to be cleaned to remove material that has built up in undesired locations within the chamber. Additionally, the sputtering target may need to be replaced. By removing the sputtering target and placing a grounded chamber lid in its place, the chamber may be plasma cleaned. The susceptor within the chamber may be electrically biased with an RF current. A stationary magnet assembly may be substantially centered behind the grounded lid to focus the cleaning plasma on the susceptor. Following the plasma cleaning, the magnet and lid may be removed and the sputtering target may be coupled to the chamber to continue processing. | 04-29-2010 |
Derrick W. Or, San Mateo, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20110264532 | SOCIAL ADVERTISING PLATFORM - Methods and systems for facilitating a social advertising platform are provided. According to one embodiment, a method is provided for enabling sharing of content by members of a peer-to-peer social advertising service that also promotes companies, products, services, organizations, charities and/or causes which they endorse. Profile information is maintained for each member and includes a list of brands, products, services, companies, organizations, charities or causes recommended or endorsed by the member. A shared link is generated corresponding to a destination link through which a member can share content associated with the destination link with third parties via social media. Responsive to receiving a click-through event for the shared link, the requestor is redirected to a social advertisement containing advertising content selected based upon the list of things endorsed by the member. After temporarily displaying the advertising content, the requestor is then redirected to the destination link. | 10-27-2011 |
Michael Or, Sacramento, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20090064938 | Extended time low-tech animal feeder - A plural day gravity fed animal feeding and watering apparatus. The non-electric apparatus has compartments for food and water. A timer that uses the principle of wicking action permits food and water to enter respective dishes. Alternatively, mass reduction via disposition of water in a bored container can deliver water to the water bowl. The mass of water disposed in a container is to be reduced by the wicking action to reduce fluid mass. For food delivery, the mass of water holds an impact plate upward but when the mass is reduced by the wicking action, the weight will discontinue hold up the impact plate and a gap opens thereby allowing food to exit through the apparatus into the food dish. Selection of wicks controls the time period before the gap opens. Each distinct areas for dispensing food or drink can be controlled separately by the proper choice of wick. | 03-12-2009 |
Wilson Or, Belmont, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20080219431 | METHOD AND APPARATUS FOR ECHO CANCELLATION - A telephony system equipped with an echo cancellation module is disclosed. A hybrid interface circuit outputs an outbound signal to a wall jack while receiving an inbound signal from the wall jack. The inbound signal may contain a line echo of the outbound signal caused by the impedance mismatches in the hybrid interface circuit. A line echo canceller containing an adaptive filter is used to cancel the line echo in the inbound signal based on the learned line echo path characteristics captured in the training period. During a brief period after the telephony system is activated, the line echo canceller enters into a calibration mode wherein its adaptive filter is trained to learn the line echo path characteristics. During the calibration mode, the line echo canceller generates a calibration signal as the outbound signal and receives the line echo from the hybrid interface circuit to perform learning of the line echo path characteristics. | 09-11-2008 |
| 20080219433 | FULL DUPLEX HANDS-FREE TELEPHONE SYSTEM - A telephone system comprising an analog telephone and a full-duplex speakerphone adapter is disclosed. The analog telephone comprises an ordinary analog telephone subscriber circuit for transmitting and receiving analog signals and a handset for users. The full-duplex speakerphone adapter is coupled between the analog telephone and a central office, uses a subscriber loop interface circuit through the first telephone line to couple to the ordinary analog telephone subscriber circuit of the analog telephone and uses a telephone hybrid interface circuit through the second telephone line to couple to a wall jack to communicate with the central office. | 09-11-2008 |
| 20080219434 | METHOD AND APPARATUS FOR VOICE COMMUNICATION - A voice communication device with an integrated framework structure for echo cancellation and noise reduction is disclosed. A microphone receives a local input signal while a speaker is outputting a local output signal. The local input signal and output signal are all decomposed into a plurality of subband signals by filter banks for conducting individual processing of echo cancellation and noise reduction per subband. The subband echo canceller is followed by a DFT unit to split the cancellation result into a plurality of narrow frequency bins whereby the noise reduction is performed. The noise reduction results are recombined by an IDFT unit for residual echo removal in a subband non-linear processor. The final output is obtained from a synthesis filter bank that synthesizes the subband signals after echo cancellation and noise reduction into a full-band signal. | 09-11-2008 |
| 20080219463 | ACOUSTIC ECHO CANCELLATION SYSTEM - An embodiment of an acoustic echo cancellation system is disclosed. The system comprises an echo cancellation unit, a second filter and a subtraction unit. The echo cancellation unit comprises a first attenuator, a first filter and a first subtractor. The first attenuator has a first down-scaling factor for attenuating a first signal. The first filter generates a first echo signal estimate based on the attenuated first signal. The first subtractor generates a third signal by subtracting the first echo signal estimate from a second signal. The second filter generates a second echo signal estimate based on the first signal. The subtraction unit subtracts the second echo signal estimate from the third signal. | 09-11-2008 |