Patents by Inventor Hao-Jen Cheng
Hao-Jen Cheng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240153842Abstract: A semiconductor structure includes a die embedded in a molding material, the die having die connectors on a first side; a first redistribution structure at the first side of the die, the first redistribution structure being electrically coupled to the die through the die connectors; a second redistribution structure at a second side of the die opposing the first side; and a thermally conductive material in the second redistribution structure, the die being interposed between the thermally conductive material and the first redistribution structure, the thermally conductive material extending through the second redistribution structure, and the thermally conductive material being electrically isolated.Type: ApplicationFiled: January 4, 2024Publication date: May 9, 2024Inventors: Hao-Jan Pei, Wei-Yu Chen, Chia-Shen Cheng, Chih-Chiang Tsao, Cheng-Ting Chen, Chia-Lun Chang, Chih-Wei Lin, Hsiu-Jen Lin, Ching-Hua Hsieh, Chung-Shi Liu
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Publication number: 20240105642Abstract: A method of manufacturing a package structure at least includes the following steps. An encapsulant laterally is formed to encapsulate the die and the plurality of through vias. A plurality of first connectors are formed to electrically connect to first surfaces of the plurality of through vias. A warpage control material is formed over the die, wherein the warpage control material is disposed to cover an entire surface of the die. A protection material is formed over the encapsulant and around the plurality of first connectors and the warpage control material. A coefficient of thermal expansion of the protection material is less than a coefficient of thermal expansion of the encapsulant.Type: ApplicationFiled: November 29, 2023Publication date: March 28, 2024Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Hao-Jan Pei, Ching-Hua Hsieh, Hsiu-Jen Lin, Wei-Yu Chen, Chia-Shen Cheng, Chih-Chiang Tsao, Jen-Jui Yu, Cheng-Shiuan Wong
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Patent number: 11942464Abstract: In an embodiment, a method includes: aligning a first package component with a second package component, the first package component having a first region and a second region, the first region including a first conductive connector, the second region including a second conductive connector; performing a first laser shot on a first portion of a top surface of the first package component, the first laser shot reflowing the first conductive connector of the first region, the first portion of the top surface of the first package component completely overlapping the first region; and after performing the first laser shot, performing a second laser shot on a second portion of the top surface of the first package component, the second laser shot reflowing the second conductive connector of the second region, the second portion of the top surface of the first package component completely overlapping the second region.Type: GrantFiled: July 19, 2021Date of Patent: March 26, 2024Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Hao-Jan Pei, Hsiu-Jen Lin, Wei-Yu Chen, Philip Yu-Shuan Chung, Chia-Shen Cheng, Kuei-Wei Huang, Ching-Hua Hsieh, Chung-Shi Liu, Chen-Hua Yu
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Publication number: 20240088062Abstract: A package structure includes a die, an encapsulant laterally encapsulating the die, a warpage control material disposed over the die, and a protection material disposed over the encapsulant and around the warpage control material. A coefficient of thermal expansion of the protection material is less than a coefficient of thermal expansion of the encapsulant.Type: ApplicationFiled: November 23, 2023Publication date: March 14, 2024Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Hao-Jan Pei, Ching-Hua Hsieh, Hsiu-Jen Lin, Wei-Yu Chen, Chia-Shen Cheng, Chih-Chiang Tsao, Jen-Jui Yu, Cheng-Shiuan Wong
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Publication number: 20240080113Abstract: Certain aspects of the present disclosure provide a method of wireless communications at a wireless node, comprising measuring one or more radio frequency (RF) performance parameters at the wireless node and tuning one or more transmission parameters based on the measurement.Type: ApplicationFiled: September 2, 2022Publication date: March 7, 2024Inventors: Chan Hong PARK, Beomsup KIM, Kwan-Woo KIM, Hao-Jen CHENG
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Publication number: 20240022955Abstract: Methods, systems, and devices for wireless communications are described. A station (STA) may receive a first signal including an indication of a set of frequency channels for a set of target wake time (TWT) sessions that recur according to a service interval. In some examples, the first signal may indicate a respective frequency channel of the set of frequency channels for each TWT session of the set of target wake time sessions. Each TWT session of the set of TWT sessions may have an associated service period that the STA may be in an awake state. The STA may switch, for the first TWT session, from the first frequency channel to the second frequency channel. In some examples, based on the switching, the STA may communicate a signal during a service period associated with the first TWT session over the second frequency channel.Type: ApplicationFiled: July 10, 2023Publication date: January 18, 2024Inventors: Srikant KUPPA, Sandip HOMCHAUDHURI, Yongchun XIAO, Hao-Jen CHENG
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Patent number: 11758433Abstract: Methods, systems, and devices for wireless communications are described. A station (STA) may receive a first signal including an indication of a set of frequency channels for a set of target wake time (TWT) sessions that recur according to a service interval. In some examples, the first signal may indicate a respective frequency channel of the set of frequency channels for each TWT session of the set of target wake time sessions. Each TWT session of the set of TWT sessions may have an associated service period that the STA may be in an awake state. The STA may switch, for the first TWT session, from the first frequency channel to the second frequency channel. In some examples, based on the switching, the STA may communicate a signal during a service period associated with the first TWT session over the second frequency channel.Type: GrantFiled: May 9, 2022Date of Patent: September 12, 2023Assignee: QUALCOMM IncorporatedInventors: Srikant Kuppa, Sandip Homchaudhuri, Yongchun Xiao, Hao-Jen Cheng
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Publication number: 20180092048Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may transmit a first calibration packet at a first power level. The wireless device may determine a power measurement corresponding to the first calibration packet based at least in part on feedback associated with a transmit power output of the first calibration packet. The wireless device may compare the power measurement corresponding to the first calibration packet to a target power level associated with the first power level. Additionally, the wireless device may adjust one or more gain parameters associated with the first power level based at least in part on the comparing.Type: ApplicationFiled: September 23, 2016Publication date: March 29, 2018Inventors: Hao-Jen Cheng, Kapil Rai, Chih-Yuan Chu, Wen-Chang Yeh
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Patent number: 9209893Abstract: A method of providing frame synchronization for GPS signals can include performing coherent bit extraction on the GPS bits and then performing coherent frame boundary detection based on the bits of the coherent bit extraction. Concurrently, differential bit extraction on the GPS bits and differential frame boundary detection based on bits of the differential bit extraction can be performed. Whichever of the coherent frame boundary detection and the differential frame boundary detection first finds a frame boundary, then that frame boundary is used for the frame synchronization. A method of providing string synchronization for GLONASS signals includes performing coherent and differential bit extraction on the GLONASS bits.Type: GrantFiled: March 13, 2013Date of Patent: December 8, 2015Assignee: QUALCOMM IncorporatedInventors: Gaspar Lee, Hao-Jen Cheng
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Patent number: 9065686Abstract: A method and device for processing spur components associated with a received wireless signal are disclosed. In one embodiment, the method includes first selecting a sub-band of a spectral band of the received signal. The selected sub-band is scanned, and a detection routine is executed to detect a spur within the scanned sub-band having a peak magnitude above a predetermined threshold. The spur frequency is determined, and the spur may be removed by a cancellation unit based on the determined frequency. The method also includes tracking the frequency of the spur to ensure continued suppression over time and under dynamic conditions.Type: GrantFiled: November 21, 2012Date of Patent: June 23, 2015Assignee: QUALCOMM IncorporatedInventors: Qinfang Sun, Chiao-Cheng Huang, Hao-Jen Cheng
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Publication number: 20140355714Abstract: A configurable pre-emphasis filter component may be configured based upon measured frequency response (e.g., filter effect) associated with at least one analog filter positioned between a digital predistortion component and a power amplification component of a transmission circuitry. The frequency response may be measured using a calibration signal sent via the transmission circuitry, a loopback circuit, and a reception circuitry. Calibration circuitry may be used with one or more loopback circuits to measure the frequency response of various analog components of the transmission circuitry. The calibration circuitry may also include logic to determine a configuration for the PEF component based upon the measured frequency response.Type: ApplicationFiled: June 4, 2013Publication date: December 4, 2014Inventors: Hao-Jen Cheng, Chiao-Cheng Huang, Hao Zhou
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Patent number: 8855171Abstract: A technique for reducing the dwell time in acquiring a satellite signal is provided. The technique minimizes the dwell time in searching for a satellite signal in cells of a search space by comparing the peak-power-to-average ratio (PAPR) to one or more thresholds at one or more intermediate points during the search in a code phase/Doppler frequency bin. The comparison is then used to determine whether to continue the search in a current code phase/Doppler frequency bin or to continue to the next code phase/Doppler frequency bin.Type: GrantFiled: August 10, 2011Date of Patent: October 7, 2014Assignee: QUALCOMM IncorporatedInventors: Chih-Yuan Chu, Hao Zhou, Hao-Jen Cheng, Qinfang Sun
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Patent number: 8824606Abstract: A receiver unit of a communication device can employ multiple correlators for decoding the access address of a packet received from another communication device. A dynamically determined primary frequency offset is applied to a phase difference signal that is determined from an RF signal that comprises the packet. For each of a plurality of access address decoding chains of the receiver unit, a secondary frequency offset associated with the access address decoding chain is applied to the phase difference signal, the phase difference signal is correlated with a predetermined access address of the communication device, and a resultant correlation output is compared against a correlation threshold. One of the access address decoding chains that generated the correlation output that is greater than the correlation threshold is selected and the packet is demodulated based, at least in part, on the phase difference signal corresponding to the selected access address decoding chain.Type: GrantFiled: May 7, 2012Date of Patent: September 2, 2014Assignee: QUALCOMM IncorporatedInventors: Hao-Jen Cheng, Qinfang Sun
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Patent number: 8754809Abstract: Updates to an AFC loop can be performed to provide high-sensitivity tracking. A 20 ms update interval and PDI=10 ms is used for every other update. A setting is used for each update between the 20 ms updates. Notably, the setting uses PDI=5 ms. The setting can include first, second, and third cross-dot pairs associated with a first bit, a second bit, and a cross-bit boundary between the first and second bits, respectively. A sum of these pairs can be scaled down when the signal strength is below a predetermined threshold. In another embodiment, the setting can include a first cross-dot pair associated with a first bit and a second cross-dot pair associated with a second bit. A sum of these pairs can also be scaled down when signal strength is below a predetermined threshold.Type: GrantFiled: March 4, 2011Date of Patent: June 17, 2014Assignee: QUALCOMM IncorporatedInventors: Hao Zhou, Hao-Jen Cheng, Qinfang Sun
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Publication number: 20140140440Abstract: A method and device for processing spur components associated with a received wireless signal are disclosed. In one embodiment, the method includes first selecting a sub-band of a spectral band of the received signal. The selected sub-band is scanned, and a detection routine is executed to detect a spur within the scanned sub-band having a peak magnitude above a predetermined threshold. The spur frequency is determined, and the spur may be removed by a cancellation unit based on the determined frequency. The method also includes tracking the frequency of the spur to ensure continued suppression over time and under dynamic conditions.Type: ApplicationFiled: November 21, 2012Publication date: May 22, 2014Applicant: QUALCOMM IncorporatedInventors: Qinfang SUN, Chiao-Cheng HUANG, Hao-Jen CHENG
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Patent number: 8675561Abstract: A method of determining a distance between a first wireless device and a second wireless device is provided. In this method, a location symbol can be generated by filtering and modulating a pseudorandom (PRN) code. The location symbol can be provided in a data field of a legacy wireless packet to form a first location packet. The first location packet can be transmitted from the first wireless device to the second wireless device. A second location packet can be transmitted from the second wireless device to the first wireless device, wherein the second location packet is substantially identical to the first location packet. An effective roundtrip time between the first and second wireless devices can be determined based on the first and second location packets. The distance between the first and second wireless devices can be computed using this roundtrip time.Type: GrantFiled: September 21, 2011Date of Patent: March 18, 2014Assignee: QUALCOMM IncorporatedInventors: Qinfang Sun, Hao Zhou, Hao-Jen Cheng
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Patent number: 8559413Abstract: A method of providing frame synchronization for GPS signals can include performing coherent bit extraction on the GPS bits and then performing coherent frame boundary detection based on the bits of the coherent bit extraction. Concurrently, differential bit extraction on the GPS bits and differential frame boundary detection based on bits of the differential bit extraction can be performed. Whichever of the coherent frame boundary detection and the differential frame boundary detection first finds a frame boundary, then that frame boundary is used for the frame synchronization. A method of providing string synchronization for GLONASS signals includes performing coherent and differential bit extraction on the GLONASS bits.Type: GrantFiled: September 30, 2010Date of Patent: October 15, 2013Assignee: QUALCOMM IncorporatedInventors: Gaspar Lee, Hao-Jen Cheng
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Publication number: 20130195229Abstract: A receiver unit of a communication device can employ multiple correlators for decoding the access address of a packet received from another communication device. A dynamically determined primary frequency offset is applied to a phase difference signal that is determined from an RF signal that comprises the packet. For each of a plurality of access address decoding chains of the receiver unit, a secondary frequency offset associated with the access address decoding chain is applied to the phase difference signal, the phase difference signal is correlated with a predetermined access address of the communication device, and a resultant correlation output is compared against a correlation threshold. One of the access address decoding chains that generated the correlation output that is greater than the correlation threshold is selected and the packet is demodulated based, at least in part, on the phase difference signal corresponding to the selected access address decoding chain.Type: ApplicationFiled: May 7, 2012Publication date: August 1, 2013Applicant: QUALCOMM ATHEROS, Inc.Inventors: Hao-Jen CHENG, Qinfang SUN
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Publication number: 20130070607Abstract: A method of determining a distance between a first wireless device and a second wireless device is provided. In this method, a location symbol can be generated by filtering and modulating a pseudorandom (PRN) code. The location symbol can be provided in a data field of a legacy wireless packet to form a first location packet. The first location packet can be transmitted from the first wireless device to the second wireless device. A second location packet can be transmitted from the second wireless device to the first wireless device, wherein the second location packet is substantially identical to the first location packet. An effective roundtrip time between the first and second wireless devices can be determined based on the first and second location packets. The distance between the first and second wireless devices can be computed using this roundtrip time.Type: ApplicationFiled: September 21, 2011Publication date: March 21, 2013Applicant: Qualcomm Atheros, Inc.Inventors: Qinfang Sun, Hao Zhou, Hao-Jen Cheng
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Publication number: 20130039392Abstract: A technique for reducing the dwell time in acquiring a satellite signal is provided. The technique minimizes the dwell time in searching for a satellite signal in cells of a search space by comparing the peak-power-to-average ratio (PAPR) to one or more thresholds at one or more intermediate points during the search in a code phase/Doppler frequency bin. The comparison is then used to determine whether to continue the search in a current code phase/Doppler frequency bin or to continue to the next code phase/Doppler frequency bin.Type: ApplicationFiled: August 10, 2011Publication date: February 14, 2013Applicant: Qualcomm Atheros, Inc.Inventors: Chih-Yuan Chu, Hao Zhou, Hao-Jen Cheng, Qinfang Sun