Patents by Inventor Kai-Wen Cheng
Kai-Wen 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: 20130228882Abstract: Methods and apparatuses for a magnetic tunnel junction (MTJ) which can be used in as a magnetic random access memory cell are disclosed. The MTJ comprises a free layer and an insulator layer. The MTJ further comprises a pinned layer with a first region, a second region, and a third region. The second region is of a first length and of a first thickness, and the first region and the third region are of a second length and of a second thickness. A ratio of the first thickness to the second thickness may be larger than 1.2. A ratio of the second length to the first length is larger than 0.5. The first thickness may be larger than a spin diffusion length of a material for the pinned layer. So formed MTJ results in increased tunneling magnetic resistance ratio and reduced critical switch current of the MTJ.Type: ApplicationFiled: March 2, 2012Publication date: September 5, 2013Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Kai-Wen Cheng, Chwen Yu, Chih-Ming Chen
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Patent number: 8471598Abstract: The present disclosure provides for magnetic logic devices and methods of operating such a device. In one embodiment, the device includes a bottom electrode configured to receive a first input current and a second input current, a bottom magnetic layer disposed over the bottom electrode, a nonmagnetic layer disposed over the bottom magnetic layer, a top magnetic layer disposed over the nonmagnetic layer, and a top electrode disposed over the top magnetic layer, the top electrode and the bottom electrode configured to provide an output voltage which is dependent on the first and second input currents and which follows an AND gate logic or an OR gate logic.Type: GrantFiled: June 16, 2011Date of Patent: June 25, 2013Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Chwen Yu, Kai-Wen Cheng, Tien-Wei Chiang
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Publication number: 20130146996Abstract: The present disclosure provides for magnetic devices and methods of fabricating such a device. In one embodiment, a magnetic device includes a first elliptical pillar of first material layers; a second elliptical pillar concentrically disposed over the first elliptical pillar, the second elliptical pillar includes second material layers. The second elliptical pillar is smaller than the first elliptical pillar in size.Type: ApplicationFiled: December 8, 2011Publication date: June 13, 2013Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Chwen Yu, Tien-Wei Chiang, Kai-Wen Cheng
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Publication number: 20130075838Abstract: The present disclosure provides a magnetoresistive random access memory (MRAM) device. The MRAM device includes a magnetic tunnel junction (MTJ) stack on a substrate; and a dual-layer passivation layer disposed around the MTJ stack. The dual-layer passivation layer includes an oxygen-free film formed adjacent sidewalls of the MTJ stack; and a moisture-blocking film formed around the oxygen-free film.Type: ApplicationFiled: September 24, 2011Publication date: March 28, 2013Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Chih-Ming Chen, Chung-Yi Yu, Cheng-Yuan Tsai, Kai-Wen Cheng
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Publication number: 20130075837Abstract: The present disclosure provides a semiconductor memory device. The device includes a pinning layer having an anti-ferromagnetic material and disposed over a first electrode; a pinned layer disposed over the pinning layer; a composite layer disposed over the pinned layer, the composite layer having a magnetic material randomly distributed in a non-magnetic material; a barrier layer disposed on the composite layer; a free layer disposed over the barrier layer; and a second electrode disposed over the free layer.Type: ApplicationFiled: September 22, 2011Publication date: March 28, 2013Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Chih-Ming Chen, Cheng-Yuan Tsai, Chung-Yi Yu, Kai-Wen Cheng, Kuo-Ming Wu
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Publication number: 20130023121Abstract: Methods for patterning material layers, which may be implemented in forming integrated circuit device features, are disclosed. In an example, a method includes forming a first resist layer over a material layer; forming a second resist layer over the first resist layer; forming an opening that extends through the second resist layer and the first resist layer to expose the material layer, wherein the opening has a substantially constant width in the second resist layer and a tapered width in the first resist layer; and performing a tilt-angle deposition process to form a feature over the exposed material layer.Type: ApplicationFiled: July 21, 2011Publication date: January 24, 2013Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Chwen Yu, Fei-Gwo Tsai, Kai-Wen Cheng
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Publication number: 20120319732Abstract: The present disclosure provides for magnetic logic devices and methods of operating such a device. In one embodiment, the device includes a bottom electrode configured to receive a first input current and a second input current, a bottom magnetic layer disposed over the bottom electrode, a nonmagnetic layer disposed over the bottom magnetic layer, a top magnetic layer disposed over the nonmagnetic layer, and a top electrode disposed over the top magnetic layer, the top electrode and the bottom electrode configured to provide an output voltage which is dependent on the first and second input currents and which follows an AND gate logic or an OR gate logic.Type: ApplicationFiled: June 16, 2011Publication date: December 20, 2012Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Chwen Yu, Kai-Wen Cheng, Tai-Wei Chiang
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Publication number: 20120278636Abstract: A network system with wake-up on LAN (WOL) mechanism and a wake-up on LAN method are disclosed. The network system includes: a first network device in a first local area network; a second network device in a second local area network, wherein the first local area network and the second local area network are different; and, a match server in a wide area network, wherein the first network device and the second network device perform data transmission through the match server.Type: ApplicationFiled: April 24, 2012Publication date: November 1, 2012Applicant: Realtek Semiconductor Corp.Inventors: Chien-Hao Lin, Sheng-Kai Hung, Meng-Han Hsieh, Kai-Wen Cheng
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Patent number: 8300741Abstract: An interference detector receives a data stream including predetermined symbols that include a first data and a second data, between which is a frequency offset. The interference detector includes a correlation apparatus that generates a first correlation result and a second correlation result according to the data stream; a power searching unit, coupled to the correlation apparatus, that generates a first maximum correlation result and a first neighboring power according to the first correlation result, and generates a second maximum correlation result and a second neighboring power according to the second correlation result; and a determining unit, coupled to the power searching unit, that generates a determination result according to the first maximum correlation result, the first neighboring power, the second maximum correlation result and the second neighboring power to indicate existence of interferences.Type: GrantFiled: May 27, 2010Date of Patent: October 30, 2012Assignee: MStar Semiconductor, Inc.Inventors: Kai-Wen Cheng, Ko-Yin Lai, Yi-Ying Liao, Tai-Lai Tung
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Patent number: 8300719Abstract: A method for detecting digital video signal parameters detects an integer carrier frequency offset (ICFO), a pilot pattern and a carrier mode of a signal received by an Orthogonal Frequency-Division Multiplexing (OFDM) communication system. The method includes receiving a first OFDM symbol comprising a plurality of first frequency-domain sub-carriers and a second OFDM symbol comprising a plurality of second frequency-domain sub-carriers; generating a plurality of sub-carrier correlation results according to the first frequency-domain sub-carrier and the second frequency-domain sub-carrier; and determining a maximum sub-carrier correlation result from the plurality of sub-carrier correlation results; and outputting an ICFO, a pilot pattern and a carrier mode corresponding to the maximum sub-carrier correlation result.Type: GrantFiled: June 2, 2010Date of Patent: October 30, 2012Assignee: MStar Semiconductor, Inc.Inventors: Kai-Wen Cheng, Jen-Hsing Wang, Ko-Yin Lai, Yi-Ying Liao, Tai-Lai Tung
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Patent number: 8279380Abstract: An LCD including a backlight module and an LCD panel is provided. The LCD panel includes a color light guide panel, suitable for differentiating an incident light into multiple color lights. The color light guide panel includes a substrate and a color light output structure. The substrate has multiple pixel regions, and the color light output structure is disposed in each of the pixel regions. The color light output structure includes first˜fourth nano-patterns. The incident light is scattered by the first nano-pattern for producing a first color light, scattered by the second nano-pattern for producing a second color light, scattered by the third nano-pattern for producing a third color light, and scattered by the fourth nano-pattern for producing a fourth color light. The color light guide panel can output uniform and high luminous first˜fourth color light, and the LCD can display high quality image.Type: GrantFiled: April 20, 2012Date of Patent: October 2, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Pei-Kuen Wei, Yeong-Der Yao, Da-Hua Wei, Shen-Yu Hsu, Kai-Wen Cheng, Tzu-Pin Lin, Chi-Neng Mo
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Publication number: 20120200807Abstract: An LCD including a backlight module and an LCD panel is provided. The LCD panel includes a color light guide panel, suitable for differentiating an incident light into multiple color lights. The color light guide panel includes a substrate and a color light output structure. The substrate has multiple pixel regions, and the color light output structure is disposed in each of the pixel regions. The color light output structure includes first˜fourth nano-patterns. The incident light is scattered by the first nano-pattern for producing a first color light, scattered by the second nano-pattern for producing a second color light, scattered by the third nano-pattern for producing a third color light, and scattered by the fourth nano-pattern for producing a fourth color light. The color light guide panel can output uniform and high luminous first˜fourth color light, and the LCD can display high quality image.Type: ApplicationFiled: April 20, 2012Publication date: August 9, 2012Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventors: Pei-Kuen Wei, Yeong-Der Yao, Da-Hua Wei, Shen-Yu Hsu, Kai-Wen Cheng, Tzu-Pin Lin, Chi-Neng Mo
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Publication number: 20120163604Abstract: A device for establishing network connection is disclosed, having a transmitting circuit, a receiving circuit, and a controller. The transmitting circuit, comprising a first scrambler having a plurality of first registers, transmits a first data scrambled by the first scrambler to a transmission line according to an oscillating signal generated by an oscillation circuit. The receiving circuit receives a second data scrambled by a second scrambler from the transmission line and comprises a descrambler having a plurality of second registers for descrambling the second data. The first and the second scramblers use the same scrambler generator polynomial. The controller compares at least one of the first data and the value of the first registers and at least one of the second data and the values of the second registers for configuring the oscillation circuit to adjust the frequency of the oscillating signal.Type: ApplicationFiled: December 23, 2011Publication date: June 28, 2012Inventors: Liang-Wei HUANG, Cheng-Han Lee, Yi-Huei Lei, Kai-Wen Cheng
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Publication number: 20120137162Abstract: A network device for building up a network connection via a high-definition multimedia interface, includes a scrambler, a descrambler, a comparator and a control unit. The scrambler is utilized for generating a transmission signal according to a first seed. The descrambler is for decoding a receiving signal to generate a second seed. The comparator is for generating a comparing result according to the first seed and the second seed. The control unit is for controlling the network connection according to the comparing result.Type: ApplicationFiled: November 28, 2011Publication date: May 31, 2012Inventors: Liang-Wei Huang, Shieh-Hsing Kuo, Chun-Hung Liu, Kai-Wen Cheng
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Patent number: 8186865Abstract: A color light guide panel, suitable for differentiating an incident light into multiple color lights is provided. The color light guide panel includes a substrate and a color light output structure. The substrate has multiple pixel regions, and the color light output structure is disposed in each of the pixel regions. The color light output structure includes a first nano-pattern, a second nano-pattern and a third nano-pattern. The incident light is scattered by the first nano-pattern for producing a first color light, scattered by the second nano-pattern for producing a second color light, and scattered by the third nano-pattern for producing a third color light. The color light guide panel can output uniform and high luminous first, second and third color light. Moreover, a liquid crystal display device having the above color light output structure is also provided.Type: GrantFiled: November 26, 2008Date of Patent: May 29, 2012Assignee: Chunghwa Picture Tubes Ltd.Inventors: Pei-Kuen Wei, Yeong-Der Yao, Da-Hua Wei, Shen-Yu Hsu, Kai-Wen Cheng, Tzu-Pin Lin, Chi-Neng Mo
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Patent number: 8013037Abstract: The invention provides a fire resistant material and a formulation thereof. The formulation comprises a liquid suspension of a modified inorganic particle and an organic component. The modified inorganic particle comprises an inorganic particle with hydroxyl groups and a surface modifier coupled to the inorganic particle via a urethane linkage, wherein the surface modifier has an ethylenically unsaturated end group. The organic component comprises a monomer, oligomer, prepolymer, polymer, or combinations thereof, capable of reacting with the ethylenically unsaturated end group.Type: GrantFiled: December 12, 2007Date of Patent: September 6, 2011Assignee: Industrial Technology Research InstituteInventors: Shou I Chen, Che I Kao, Chih-Chien Chen, Jin-Her Shen, Wei-Feng Teng, Hsiao-Pin Chiang, Kai-Wen Cheng, Fan-Jeng Tsai
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Publication number: 20110110383Abstract: The disclosure is a network interface controller (NIC) capable of sharing buffers, which is coupled to a host and a network to make the network connection. The NIC includes a transmitting buffer, a transmitting controller, a receiving buffer, and a receiving controller. The transmitting controller controls the transmitting buffer to transmit the transmission data provided by the host to the network. The receiving controller controls the receiving buffer to transmit the reception data received from the network to the host, and determines a storage capacity of the receiving buffer. When the storage capacity is smaller than a set value, the receiving controller transmits a request signal to the transmitting controller, the transmitting controller generates a response signal according to the request signal and a status signal corresponding to the transmitting buffer, and the receiving controller controls whether reception data is stored in the transmitting buffer according to the response signal.Type: ApplicationFiled: November 9, 2010Publication date: May 12, 2011Inventors: Kuo-Nan YANG, Yen-Hsu Shih, Chia-Ying Chiu, Kai-Wen Cheng
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Publication number: 20110002422Abstract: A method for detecting digital video signal parameters detects an integer carrier frequency offset (ICFO), a pilot pattern and a carrier mode of a signal received by an Orthogonal Frequency-Division Multiplexing (OFDM) communication system. The method includes receiving a first OFDM symbol comprising a plurality of first frequency-domain sub-carriers and a second OFDM symbol comprising a plurality of second frequency-domain sub-carriers; generating a plurality of sub-carrier correlation results according to the first frequency-domain sub-carrier and the second frequency-domain sub-carrier; and determining a maximum sub-carrier correlation result from the plurality of sub-carrier correlation results; and outputting an ICFO, a pilot pattern and a carrier mode corresponding to the maximum sub-carrier correlation result.Type: ApplicationFiled: June 2, 2010Publication date: January 6, 2011Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Kai-Wen Cheng, Jen-Hsing Wang, Ko-Yin Lai, Yi-Ying Liao, Tai-Lai Tung
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Publication number: 20100329396Abstract: An interference detector receives a data stream including predetermined symbols that include a first data and a second data, between which is a frequency offset. The interference detector includes a correlation apparatus that generates a first correlation result and a second correlation result according to the data stream; a power searching unit, coupled to the correlation apparatus, that generates a first maximum correlation result and a first neighboring power according to the first correlation result, and generates a second maximum correlation result and a second neighboring power according to the second correlation result; and a determining unit, coupled to the power searching unit, that generates a determination result according to the first maximum correlation result, the first neighboring power, the second maximum correlation result and the second neighboring power to indicate existence of interferences.Type: ApplicationFiled: May 27, 2010Publication date: December 30, 2010Applicant: MStar Semiconductor, Inc.Inventors: Kai-Wen Cheng, Ko-Yin Lai, Yi-Ying Liao, Tai-Lai Tung
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Publication number: 20100296002Abstract: A circuit for detecting a digital data stream includes a first detecting circuit, a second detecting circuit and a decision unit. The digital data stream includes a predetermined symbol having a first data and a second data. The first detecting circuit detects a correlation between the second data and a first frequency-shifted data to generate a first correlated data; and the second detecting circuit detects a correlation between the second data and a second frequency-shifted data to generate a first correlated data, where the first frequency-shifted data and the second frequency-shifted data are generated by performing first frequency-shifting and second frequency-shifting upon the first data, respectively. The decision unit determines a signal status of the digital data stream according to the first and second correlated data.Type: ApplicationFiled: April 22, 2010Publication date: November 25, 2010Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Kai-Wen Cheng, Ko-Yin Lai, Yi-Ying Liao, Tai-Lai Tung