Patents by Inventor Xing Zhang
Xing Zhang 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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Patent number: 8652929Abstract: The present invention discloses a CMOS device of reducing charge sharing effect and a fabrication method thereof. The present invention has an additional isolation for trapping carriers disposed right below an isolation region. the material of the additional isolation region is porous silicon. Since porous silicon is a functional material of spongy structure by electrochemistry anodic oxidizing monocrystalline silicon wafer, there are a large number of microvoids and dangling bonds on the surface layer of the porous silicon. These defects may form defect states in a center of forbidden band of the porous silicon, the defect states may trap carriers so as to cause an increased resistance. And with an increase of density of corrosion current, porosity increases, and defects in the porous silicon increase.Type: GrantFiled: April 16, 2012Date of Patent: February 18, 2014Assignee: Peking UniversityInventors: Ru Huang, Fei Tan, Xia An, Qianqian Huang, Dong Yang, Xing Zhang
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Patent number: 8632691Abstract: Disclosed herein is an interface treatment method for germanium-based device, which belongs to the field of manufacturing technologies of ultra large scaled integrated (ULSI) circuits. In the method, the natural oxide layer on the surface of the germanium-based substrate is removed by using a concentrated hydrochloric acid solution having a mass percentage concentration of 15%˜36%, and dangling bonds of the surface are performed a passivation treatment by using a diluted hydrochloric acid solution having a mass percentage concentration of 5%˜10% so as to form a stable passivation layer on the surface. This method makes a good foundation for depositing a high-K (high dielectric constant) gate dielectric on the surface of the germanium-based substrate after cleaning and passivating, enhances quality of the interface between the gate dielectric and the substrate, and improves the electrical performance of germanium-based MOS device.Type: GrantFiled: June 14, 2012Date of Patent: January 21, 2014Assignee: Peking UniversityInventors: Ru Huang, Min Li, Xia An, Ming Li, Meng Lin, Xing Zhang
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Publication number: 20140019908Abstract: When the user touches a touch selectable element, the appearance of the computer recognized selected element may be changed so that the user can confirm that the element is, in fact, the element the user intended to select. If it is not, in some embodiments, the user can slide the user's finger to the correct element and, again, that element may be modified in a way to indicate to the user which element has now been selected. When the user removes the user's finger from the touch selectable element, in some embodiments, the element is then selected. Also, the user, in some embodiments, can touch blank areas of the display screen to reveal which elements on the display screen are touch selectable elements.Type: ApplicationFiled: January 3, 2012Publication date: January 16, 2014Inventors: Xing Zhang, Ningxin Hu, Xiaoqing Zhao
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Publication number: 20130309875Abstract: Disclosed herein is an interface treatment method for germanium-based device, which belongs to the field of manufacturing technologies of ultra large scaled integrated (ULSI) circuits. In the method, the natural oxide layer on ther surface of the germanium-based substrate is removed by using a concentrated hydrochloric acid solution having a mass percentage concentration of 15%˜36%, and dangling bonds of the surface are performed a passivation treatment by using a diluted hydrochloric acid solution having a mass percentage concentration of 5%˜10% so as to form a stable passivation layer on the surface. This method makes a good foundation for depositing a high-K (high dielectric constant) gate dielectric on the surface of the germanium-based substrate after cleaning and passivating, enhances quality of the interface between the gate dielectric and the substrate, and improves the electrical performance of germanium-based MOS device.Type: ApplicationFiled: June 14, 2012Publication date: November 21, 2013Inventors: Ru Huang, Min Li, Xia An, Ming Li, Meng Lin, Xing Zhang
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Patent number: 8541847Abstract: The present invention provides a semiconductor device and a method for fabricating the same, wherein the method comprises: providing a germanium-based semiconductor substrate having a plurality of active regions and device isolation regions between the plurality of the active regions, wherein a gate dielectric layer and a gate over the gate dielectric layer are provided on the active regions, and the active regions include source and drain extension regions and deep source and drain regions; performing a first ion implantation process with respect to the source and drain extension regions, wherein the ions implanted in the first ion implantation process include silicon or carbon; performing a second ion implantation process with respect to the source and drain extension regions; performing a third ion implantation process with respect to the deep source and drain regions; performing an annealing process with respect to the germanium-based semiconductor substrate which has been subjected to the third ion implaType: GrantFiled: September 25, 2010Date of Patent: September 24, 2013Assignee: Peking UniversityInventors: Xia An, Yue Guo, Quanxin Yun, Ru Huang, Xing Zhang
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Publication number: 20130161757Abstract: The present invention discloses a CMOS device of reducing charge sharing effect and a fabrication method thereof. The present invention has an additional isolation for trapping carriers disposed right below an isolation region. the material of the additional isolation region is porous silicon. Since porous silicon is a functional material of spongy structure by electrochemistry anodic oxidizing monocrystalline silicon wafer, there are a large number of microvoids and dangling bonds on the surface layer of the porous silicon. These defects may form defect states in a center of forbidden band of the porous silicon, the defect states may trap carriers so as to cause an increased resistance. And with an increase of density of corrosion current, porosity increases, and defects in the porous silicon increase.Type: ApplicationFiled: April 16, 2012Publication date: June 27, 2013Inventors: Ru Huang, Fei Tan, Xia An, Qianqian Huang, Dong Yang, Xing Zhang
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Patent number: 8450155Abstract: The present invention relates to CMOS ultra large scale integrated circuits, and provides a method for introducing channel stress and a field effect transistor fabricated by the same. According to the present invention, a strained dielectric layer is interposed between source/drain regions and a substrate of a field effect transistor, and a strain is induced in a channel by the strained dielectric layer which directly contacts the substrate, so as to improve a carrier mobility of the channel and a performance of the device. The specific effects of the invention include: a tensile strain may be induced in the channel by using the strained dielectric layer having a tensile strain in order to increase an electron mobility of the channel; a compressive strain may be induced in the channel by using the strained dielectric layer having a compressive strain in order to increase a hole mobility of the channel.Type: GrantFiled: April 1, 2011Date of Patent: May 28, 2013Assignee: Peking UniversityInventors: Ru Huang, Quanxin Yun, Xia An, Xing Zhang
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Publication number: 20130119445Abstract: A CMOS device for reducing a radiation-induced charge collection and a method for fabricating the same. In the CMOS device, a heavily doped charge collection-suppressed region is disposed directly under the source region and the drain region. The region has a doping type opposite that of the source region and the drain region, and has a doping concentration not less than that of the source region and the drain region. The charge collection-suppressed region has a lateral part slightly less than or equal to that of the source region and the drain region, and has a lateral range toward to the channel not exceed the edges of the source region and the drain region. The CMOS device may greatly reduce a range of the funnel that appears under the action of a single particle, so that charges collected instantaneously under a force of an electric field may be reduced.Type: ApplicationFiled: November 30, 2011Publication date: May 16, 2013Applicant: PEKING UNIVERSITYInventors: Ru Huang, Fei Tan, Xia An, Qianqian Huang, Dong Yang, Xing Zhang
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Patent number: 8436522Abstract: A carbon nanotube slurry consists of carbon nanotubes, glass powder, and organic carrier. The field emission device includes an insulative substrate, a cathode conductive layer, and an electron emission layer. The cathode conductive layer is located on a surface of the insulative substrate. The electron emission layer is located on a surface of the cathode conductive layer. The electron emission layer consists of a glass layer and a plurality of carbon nanotubes electrically connected to the cathode conductive layer.Type: GrantFiled: October 14, 2010Date of Patent: May 7, 2013Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.Inventors: Qi Cai, Xing Zhang, Hai-Yan Hao, Shou-Shan Fan
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Patent number: 8431181Abstract: A method for surface treating a cold cathode includes the following steps. A cold cathode is provided and the cold cathode includes a plurality of field emitters. A liquid glue is placed on a surface of the cold cathode. The liquid glue is cured to form solid glue on the surface of the cold cathode. The solid glue is removed to allow the plurality of field emitters to stand upright.Type: GrantFiled: December 31, 2009Date of Patent: April 30, 2013Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.Inventors: Qi Cai, Tong-Feng Gao, Xing Zhang, Liang Liu, Shou-Shan Fan
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Publication number: 20130103351Abstract: Disclosed herein is a method for predicting a reliable lifetime of a SOI MOSFET device.Type: ApplicationFiled: November 30, 2011Publication date: April 25, 2013Inventors: Ru Huang, Dong Yang, Xia An, Xing Zhang
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Publication number: 20130069126Abstract: An embodiment of the invention provides a germanium-based NMOS device and a method for fabricating the same, which relates to fabrication process technology of an ultra-large-scale-integrated (ULSI) circuit. The germanium-based NMOS device has two dielectric layer interposed between a metal source/drain and a substrate. The bottom dielectric layer includes a dielectric material having a high pinning coefficient S such as hafnium oxide, silicon nitride, hafnium silicon oxide or the like, and the top dielectric layer includes a dielectric material having a low conduction band offset ?EC such as titanium oxide, gallium oxide, strontium titanium oxide or the like. According to the method, Fermi level pinning effect can be alleviated, electron barrier height can be lowered, and thus performance of the germanium-based Schottky NMOS device can be improved.Type: ApplicationFiled: February 21, 2012Publication date: March 21, 2013Applicant: PEKING UNIVERSITYInventors: Ru Huang, Zhiqiang Li, Xia An, Yue Guo, Xing Zhang
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Publication number: 20130043515Abstract: The present invention discloses a strained channel field effect transistor and a method for fabricating the same. The field effect transistor comprises a substrate, a source/drain, a gate dielectric layer, and a gate, characterized in that, an “L” shaped composite isolation layer, which envelops a part of a side face of the source/drain adjacent to a channel and the bottom of the source/drain, is arranged between the source/drain and the substrate; the composite isolation layer is divided into two layers, that is, an “L” shaped insulation thin layer contacting directly with the substrate and an “L” shaped high stress layer contacting directly with the source and the drain. The field effect transistor of such a structure improves the mobility of charge carriers by introducing stress into the channel by means of the high stress layer, while fundamentally improving the device structure of the field effect transistor and improving the short channel effect suppressing ability of the device.Type: ApplicationFiled: March 23, 2011Publication date: February 21, 2013Inventors: Ru Huang, Quanxin Yun, Xia An, Yujie Ai, Xing Zhang
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Publication number: 20130013245Abstract: The present invention discloses a method for obtaining a distribution of charges along a channel of a MOS transistor, which is used for obtaining distributions of interface states charges and charges of a gate dielectric layer in the MOS transistor. The method includes: adding a MOS transistor into a test circuit; measuring two charge pumping current curves when a source terminal is open-circuited or when a drain terminal is open-circuited before and after a stress is applied by using a charge pumping current test method, where one of the two charge pumping current curves is an original curve and the other one is an post-stress curve; finding a point B corresponding to a point A on the original curve on the post-stress curve, and estimating amount of locally-generated interface states charges and charges of the gate dielectric layer by a variation of the charge pumping current and a variation in a voltage at a local point.Type: ApplicationFiled: October 28, 2011Publication date: January 10, 2013Applicant: PEKING UNIVERSITYInventors: Ru Huang, Dong Yang, Fei Tan, Xia An, Xing Zhang
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Publication number: 20120289004Abstract: The present invention discloses a fabrication method of a Ge-based N-type Schottky field effect transistor and relates to a filed of ultra-large-scaled integrated circuit fabrication process. The present invention forms a thin high K dielectric layer between a substrate and a metal source/drain. The thin layer on one hand may block the electron wave function of metal from inducing an MIGS interface state in the semiconductor forbidden band, on the other hand may passivate the dangling bonds at the interface of Ge. Meanwhile, since the insulating dielectric layer has a very thin thickness, and electrons can substantially pass freely, the parasitic resistances of the source and the drain are not significantly increased. The method can weaken the Fermi level pinning effect, cause the Fermi energy level close to the position of the conduction band of Ge and lower the electron barrier, thereby increasing the current switching ratio of the Ge-based Schottky transistor and improve the performance of the NMOS device.Type: ApplicationFiled: October 14, 2011Publication date: November 15, 2012Applicant: PEKING UNIVERSITYInventors: Ru Huang, Zhiqiang Li, Yue Guo, Xia An, Quanxin Yun, Yinglong Huang, Xing Zhang
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Publication number: 20120264311Abstract: The present invention provides a surface treatment method for germanium based device. Through performing surface pretreatment to the germanium based device by using an aqueous solution of ammonium fluoride as a passivant, the interface state may be reduced, the formation of natural oxidation layer at the germanium surface may be inhibited, the regeneration of natural oxidation layer and the out-diffusion of the germanium based substrate material can be effectively inhibited, and the thermal stability of the metal germanide may also be increased significantly, so that the interface quality of the germanium based device is improved easily and effectively, which are advantageous to improve the performance of the germanium based transistor.Type: ApplicationFiled: April 8, 2011Publication date: October 18, 2012Applicant: PEKING UNIVERSITYInventors: Xia An, Yue Guo, Runsheng Wang, Ru Huang, Xing Zhang
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Publication number: 20120212080Abstract: A permanent magnet motor has a rotor and a stator. The rotor has a shaft, a rotor core and commutator fixed to the shaft, and rotor windings wound about poles of the rotor core and electrically connected to the commutator. The stator has an axially extending round housing, a ring magnet member fixed to an inner surface of the round housing, an endcap, and at least one pair of brushes in sliding contact with the commutator. A chamber is formed by the housing and the endcap. The commutator is disposed in the chamber. A window lift device incorporating the motor is also provided.Type: ApplicationFiled: February 17, 2012Publication date: August 23, 2012Inventors: Mao Xiong Jiang, Yue Li, Jian Zhao, Hong Min Wei, Ke Lin Zhou, Xing Zhang
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Publication number: 20120187495Abstract: The present invention provides a semiconductor device and a method for fabricating the same, wherein the method comprises: providing a germanium-based semiconductor substrate having a plurality of active regions and device isolation regions between the plurality of the active regions, wherein a gate dielectric layer and a gate over the gate dielectric layer are provided on the active regions, and the active regions include source and drain extension regions and deep source and drain regions; performing a first ion implantation process with respect to the source and drain extension regions, wherein the ions implanted in the first ion implantation process include silicon or carbon; performing a second ion implantation process with respect to the source and drain extension regions; performing a third ion implantation process with respect to the deep source and drain regions; performing an annealing process with respect to the germanium-based semiconductor substrate which has been subjected to the third ion implaType: ApplicationFiled: September 25, 2010Publication date: July 26, 2012Inventors: Xia An, Yue Guo, Quanxin Yun, Ru Huang, Xing Zhang
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Publication number: 20120169323Abstract: Congruent power and timing signals in a single electronic device. In an embodiment, a circuit may include just one isolation transformer operable to generate a power signal and a timing signal. On the secondary side, two branches may extract both a power signal and a clock signal for use in the circuit on the isolated secondary side. The first branch may be coupled to the transformer and operable to manipulate the signal into a power signal, such as a 5V DC signal. Likewise, the second circuit branch is operable to manipulate the signal into a clock signal, such as a 5 V signal with a frequency of 1 MHz. By extracting both a power supply signal and a clock signal from the same isolation transformer on the secondary side, valuable space may be saved on an integrated circuit device with only having a single winding for a single isolation transformer.Type: ApplicationFiled: December 22, 2011Publication date: July 5, 2012Applicant: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD.Inventors: Henry GE, Welsin WANG, Xing ZHANG
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Publication number: 20120032239Abstract: The present invention relates to CMOS ultra large scale integrated circuits, and provides a method for introducing channel stress and a field effect transistor fabricated by the same. According to the present invention, a strained dielectric layer is interposed between source/drain regions and a substrate of a field effect transistor, and a strain is induced in a channel by the strained dielectric layer which directly contacts the substrate, so as to improve a carrier mobility of the channel and a performance of the device. The specific effects of the invention include: a tensile strain may be induced in the channel by using the strained dielectric layer having a tensile strain in order to increase an electron mobility of the channel; a compressive strain may be induced in the channel by using the strained dielectric layer having a compressive strain in order to increase a hole mobility of the channel.Type: ApplicationFiled: April 1, 2011Publication date: February 9, 2012Inventors: Ru Huang, Quanxin Yun, Xia An, Xing Zhang