Doping Patents (Class 438/914)
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Patent number: 9012313Abstract: A semiconductor structure includes a substrate and a resistor provided over the substrate. The resistor includes a first material layer, a second material layer, a first contact structure and a second contact structure. The first material layer includes at least one of a metal and a metal compound. The second material layer includes a semiconductor material. The second material layer is provided over the first material layer and includes a first sub-layer and a second sub-layer. The second sub-layer is provided over the first sub-layer. The first sub-layer and the second sub-layer are differently doped. Each of the first contact structure and the second contact structure provides an electrical connection to the second sub-layer of the second material layer.Type: GrantFiled: February 6, 2014Date of Patent: April 21, 2015Assignee: GLOBALFOUNDRIES Inc.Inventor: Alexandru Romanescu
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Patent number: 8975603Abstract: Systems and methods for plasma doping microfeature workpieces are disclosed herein. In one embodiment, a method of implanting boron ions into a region of a workpiece includes generating a plasma in a chamber, selectively applying a pulsed electrical potential to the workpiece with a duty cycle of between approximately 20 percent and approximately 50 percent, and implanting an ion specie into the region of the workpiece.Type: GrantFiled: February 3, 2014Date of Patent: March 10, 2015Assignee: Micron Technology, Inc.Inventors: Shu Qin, Allen McTeer
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Patent number: 8642135Abstract: Systems and methods for plasma doping microfeature workpieces are disclosed herein. In one embodiment, a method of implanting boron ions into a region of a workpiece includes generating a plasma in a chamber, selectively applying a pulsed electrical potential to the workpiece with a duty cycle of between approximately 20 percent and approximately 50 percent, and implanting an ion specie into the region of the workpiece.Type: GrantFiled: September 1, 2005Date of Patent: February 4, 2014Assignee: Micron Technology, Inc.Inventors: Shu Qin, Allen McTeer
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Patent number: 8497194Abstract: Some embodiments include methods of forming one or more doped regions in a semiconductor substrate. Plasma doping may be used to form a first dopant to a first depth within the substrate. The first dopant may then be impacted with a second dopant to knock the first dopant to a second depth within the substrate. In some embodiments the first dopant is p-type (such as boron) and the second dopant is neutral type (such as germanium). In some embodiments the second dopant is heavier than the first dopant.Type: GrantFiled: November 12, 2012Date of Patent: July 30, 2013Assignee: Micron Technology, Inc.Inventors: Lequn Jennifer Liu, Shu Qin, Allen McTeer, Yongjun Jeff Hu
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Patent number: 8481412Abstract: A method of and apparatus for forming interconnects on a substrate includes etching patterns in ultra-low k dielectric and removing moisture from the ultra-low k dielectric using active energy assist baking. During active energy assist baking, the ultra-low k dielectric is heated and exposed to light having only wavelengths greater than 400 nm for about 1 to about 20 minutes at a temperature of about 300 to about 400 degrees Celsius. The active energy assist baking is performed after wet-cleaning or after chemical mechanical polishing, or both.Type: GrantFiled: September 29, 2010Date of Patent: July 9, 2013Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Chung-Chi Ko, Chia Cheng Chou, Keng-Chu Lin, Joung-Wei Liou, Shwang-Ming Jeng, Mei-Ling Chen
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Patent number: 8470627Abstract: A method for manufacturing a semiconductor light emitting device is provided. The device includes: an n-type semiconductor layer; a p-type semiconductor layer; and a light emitting unit provided between the n-type semiconductor layer and the p-type semiconductor layer. The method includes: forming a buffer layer made of a crystalline AlxGa1-xN (0.8?x?1) on a first substrate made of c-plane sapphire and forming a GaN layer on the buffer layer; stacking the n-type semiconductor layer, the light emitting unit, and the p-type semiconductor layer on the GaN layer; and separating the first substrate by irradiating the GaN layer with a laser having a wavelength shorter than a bandgap wavelength of GaN from the first substrate side through the first substrate and the buffer layer.Type: GrantFiled: November 8, 2012Date of Patent: June 25, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Yasuo Ohba, Kei Kaneko, Toru Gotoda, Hiroshi Katsuno, Mitsuhiro Kushibe
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Patent number: 8329567Abstract: Some embodiments include methods of forming one or more doped regions in a semiconductor substrate. Plasma doping may be used to form a first dopant to a first depth within the substrate. The first dopant may then be impacted with a second dopant to knock the first dopant to a second depth within the substrate. In some embodiments the first dopant is p-type (such as boron) and the second dopant is neutral type (such as germanium). In some embodiments the second dopant is heavier than the first dopant.Type: GrantFiled: November 3, 2010Date of Patent: December 11, 2012Assignee: Micron Technology, Inc.Inventors: Jennifer Lequn Liu, Shu Qin, Allen McTeer, Yongjun Jeff Hu
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Patent number: 8293629Abstract: Embodiments of a process for forming a photodetector region in a CMOS pixel by dopant implantation, the process comprising masking a photodetector area of a surface of a substrate for formation of the photodetector region, positioning the substrate at a plurality of twist angles, and at each of the plurality of twist angles, directing dopants at the photodetector area at a selected tilt angle. Embodiments of a CMOS pixel comprising a photodetector region formed in a substrate, the photodetector region comprising overlapping first and second dopant implants, wherein the overlap region has a different dopant concentration than the non-overlapping parts of the first and second implants, a floating diffusion formed in the substrate, and a transfer gate formed on the substrate between the photodetector and the transfer gate. Other embodiments are disclosed and claimed.Type: GrantFiled: April 6, 2010Date of Patent: October 23, 2012Assignee: OmniVision Technologies, Inc.Inventors: Duli Mao, Hsin-Chih Tai, Vincent Venezia, Yin Qian, Howard E. Rhodes
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Patent number: 8288256Abstract: By combining an anneal process for adjusting the effective channel length and a substantially diffusion-free anneal process performed after a deep drain and source implantation, the vertical extension of the drain and source region may be increased substantially without affecting the previously adjusted channel length. In this manner, in SOI devices, the drain and source regions may extend down to the buried insulating layer, thereby reducing the parasitic capacitance, while the degree of dopant activation and thus series resistance in the extension regions may be improved. Furthermore, less critical process parameters during the anneal process for adjusting the channel length may provide the potential for reducing the lateral dimensions of the transistor devices.Type: GrantFiled: January 31, 2008Date of Patent: October 16, 2012Assignee: Advanced Micro Devices, Inc.Inventors: Thomas Feudel, Rolf Stephan, Manfred Horstmann
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Patent number: 8273642Abstract: A SiC region and a source/drain region are formed such that the SiC region includes a first portion overlapping the source/drain region and a second portion protruding from the source/drain region to a position beneath the LDD region. The concentration of crystalline SiC in the second portion is higher than the concentration of crystalline SiC in the first portion. The SiC region may be formed through a normal implantation before the second spacer is formed, or the SiC region may be formed through a tilt implantation or deposition epitaxially in a recess having a sigma-shape like sidewall after the second spacer is formed.Type: GrantFiled: October 4, 2010Date of Patent: September 25, 2012Assignee: United Microelectronics Corp.Inventors: Chen-Hua Tsai, Po-Jui Liao, Tzu-Feng Kuo, Ching-I Li, Cheng-Tzung Tsai
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Patent number: 8268729Abstract: A method for processing a semiconductor fin structure is disclosed. The method includes thermal annealing a fin structure in an ambient containing an isotope of hydrogen. Following the thermal annealing step, the fin structure is etched in a crystal-orientation dependent, self-limiting, manner. The crystal-orientation dependent etch may be selected to be an aqueous solution containing ammonium hydroxide (NH4OH). The completed fin structure has smooth sidewalls and a uniform thickness profile. The fin structure sidewalls are {110} planes.Type: GrantFiled: August 21, 2008Date of Patent: September 18, 2012Assignee: International Business Machines CorporationInventors: Kangguo Cheng, Bruce B. Doris, Johnathan E. Faltermeier, Ying Zhang
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Patent number: 8207051Abstract: Methods, systems, and devices associated with surface modifying a semiconductor material are taught. One such method includes providing a semiconductor material having a target region and providing a dopant fluid layer that is adjacent to the target region of the semiconductor material, where the dopant fluid layer includes at least one dopant. The target region of the semiconductor material is lased so as to incorporate the dopant or to surface modify the semiconductor material. During the surface modification, the dopant in the dopant fluid layer is actively replenished.Type: GrantFiled: April 28, 2009Date of Patent: June 26, 2012Assignee: SiOnyx, Inc.Inventors: Jason Sickler, Keith Donaldson
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Patent number: 8017488Abstract: A manufacturing method of a NOR flash memory with phosphorous and arsenic ion implantations mainly implants both phosphorous and arsenic ions on a drain area of a transistor memory unit, and controls specific energy and dosage for the implantation to reduce the defects of a memory device and improve the yield rate of the NOR flash memory.Type: GrantFiled: September 18, 2009Date of Patent: September 13, 2011Assignee: EON Silicon Solutions Inc.Inventors: Sheng-Da Liu, Yider Wu
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Patent number: 7980198Abstract: It is an object of the present invention to provide a doping apparatus, a doping method, and a method for fabricating a thin film transistor that can carry out doping to the carrier concentration which is optimum for obtaining the desired electric characteristic non-destructively and in an easy manner. In accordance with the present invention, an electric characteristic of a semiconductor element (threshold voltage in a transistor and the like) is correctly and precisely monitored by using a contact angle, and is controlled by controlling a doping method. In addition, the present invention can be momentarily acquired information by in-situ monitoring the characteristic and can be fed back without a time lag.Type: GrantFiled: April 7, 2010Date of Patent: July 19, 2011Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Junichi Koezuka, Naoto Yamade
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Publication number: 20110034014Abstract: A method of applying a silicide to a substrate while minimizing adverse effects, such as lateral diffusion of metal or “piping” is disclosed. The implantation of the source and drain regions of a semiconductor device are performed at cold temperatures, such as below 0° C. This cold implant reduces the structural damage caused by the impacting ions. Subsequently, a silicide layer is applied, and due to the reduced structural damage, metal diffusion and piping into the substrate is lessened. In some embodiments, an amorphization implant is performed after the implantation of dopants, but prior to the application of the silicide. By performing this pre-silicide implant at cold temperatures, similar results can be obtained.Type: ApplicationFiled: August 4, 2010Publication date: February 10, 2011Applicant: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.Inventors: Christopher R. Hatem, Benjamin Colombeau, Thirumal Thanigaivelan, Kyu-Ha Shim, Jay T. Scheuer
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Patent number: 7846822Abstract: The present invention provides methods for fabricating semiconductor structures and devices, particularly ultra-shallow doped semiconductor structures exhibiting low electrical resistance. Methods of the present invention use modification of the composition of semiconductor surfaces to allow fabrication of a doped semiconductor structure having a selected dopant concentration depth profile, which provides useful junctions and other device components in microelectronic and nanoelectronic devices, such as transistors in high density integrated circuits. Surface modification in the present invention also allows for control of the concentration and depth profile of defects, such as interstitials and vacancies, in undersaturated semiconductor materials.Type: GrantFiled: July 28, 2005Date of Patent: December 7, 2010Assignee: The Board of Trustees of the University of IllinoisInventors: Edmund G. Seebauer, Richard D. Braatz, Michael Yoo Lim Jung, Rudiyanto Gunawan
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Patent number: 7816279Abstract: A semiconductor device includes a first conductor disposed on a semiconductor substrate; an oxygen-containing insulation film disposed on the semiconductor substrate and on the first conductor, the insulation film having a contact hole which extends to the first conductor and a trench which is connected to an upper portion of the contact hole; a zirconium oxide film disposed on a side surface of the contact hole and a side surface and a bottom surface of the trench; a zirconium film disposed on the zirconium oxide film inside the contact hole and inside the trench; and a second conductor composed of Cu embedded into the contact hole and into the trench.Type: GrantFiled: February 11, 2009Date of Patent: October 19, 2010Assignee: Fujitsu Semiconductor LimitedInventors: Michie Sunayama, Yoshiyuki Nakao, Noriyoshi Shimizu
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Patent number: 7795143Abstract: A substrate processing apparatus, including: a reaction container in which a substrate is processed; a seal cap, brought into contact with one end in an opening side of the reaction container via a first sealing member and a second sealing member so as to seal the opening of the reaction container air-tightly; a first gas channel, formed in a region between the first sealing member and the second sealing member in a state where the seal cap is in contact with the reaction container; a second gas channel, provided to the seal cap and through which the first gas channel is in communication with an inside of the reaction container; a first gas supply port that is provided to the reaction container and supplies a first gas to the first gas channel; and a second gas supply port that is provided to the reaction container and supplies a second gas into the reaction container, wherein a front end opening of the first gas supply port opening to the first gas channel, and a base opening of the second gas channel openinType: GrantFiled: August 9, 2007Date of Patent: September 14, 2010Assignee: Hitachi Kokusai Electric Inc.Inventors: Kiyohiko Maeda, Takeo Hanashima, Masanao Osanai
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Patent number: 7750405Abstract: A method of fabricating a high-performance planar back-gate CMOS structure having superior short-channel characteristics and reduced capacitance using processing steps that are not too lengthy or costly is provided. Also provided is a high-performance planar back-gate CMOS structure that is formed utilizing the method of the present invention. The method includes forming an opening in an upper surface of a substrate. Thereafter, a dopant region is formed in the substrate through the opening. In accordance with the inventive method, the dopant region defines a back-gate conductor of the inventive structure. Next, a front gate conductor having at least a portion thereof is formed within the opening.Type: GrantFiled: October 24, 2007Date of Patent: July 6, 2010Assignee: International Business Machines CorporationInventor: Edward J. Nowak
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Patent number: 7728347Abstract: A ZnO layer is provided which can obtain emission at a wavelength longer than blue (e.g., 420 nm) and has a novel structure. A transition energy narrower by 0.6 eV or larger than a band gap of ZnO can be obtained by doping S into a ZnO layer.Type: GrantFiled: April 23, 2009Date of Patent: June 1, 2010Assignee: Stanley Electric Co., Ltd.Inventors: Akio Ogawa, Michihiro Sano, Hiroyuki Kato, Hiroshi Kotani, Tomofumi Yamamuro
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Patent number: 7713761Abstract: It is an object of the present invention to provide a doping apparatus, a doping method, and a method for fabricating a thin film transistor that can carry out doping to the carrier concentration which is optimum for obtaining the desired electric characteristic non-destructively and in an easy manner. In accordance with the present invention, an electric characteristic of a semiconductor element (threshold voltage in a transistor and the like) is correctly and precisely monitored by using a contact angle, and is controlled by controlling a doping method. In addition, the present invention can be momentarily acquired information by in-situ monitoring the characteristic and can be fed back without a time lag.Type: GrantFiled: May 18, 2007Date of Patent: May 11, 2010Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Junichi Koezuka, Naoto Yamade
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Patent number: 7560367Abstract: In this invention, a wafer is placed and kept in the low-temperature region at the bottom of a temperature space that is in a state of radiation equilibrium and that is formed inside chamber by a heating unit. The substrate temperature is gradually raised to a temperature ranging from 750° C. to 800° C. Next, the wafer is placed and kept in the high-temperature region in the temperature space and the substrate temperature is raised to the thermal processing temperature. Then thermal processing is performed for a specified period of time. By doing this, it is possible to perform uniform thermal processing without depending on the state of the wafer (ratio of an area covered by silicon nitride film or polysilicon film).Type: GrantFiled: February 14, 2006Date of Patent: July 14, 2009Assignee: Panasonic CorporationInventors: Fumitoshi Kawase, Satoshi Shibata
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Patent number: 7368317Abstract: The invention relates to a method of producing an n-type diamond. The inventive method comprises an n-doping stage during which a donor species is vacuum diffused in a diamond that was initially doped with an acceptor, in order to form donor groups containing the donor species, at a temperature that is less than or equal to the dissociation temperature of the complexes formed between the acceptor and the donor species.Type: GrantFiled: June 3, 2005Date of Patent: May 6, 2008Assignees: Centre National de la Recherche Scientifique-CNRS, Universite de Versailles St-Quentin En YvelinesInventors: Jacques Paul Marie Chevallier, Zephirin Symplice Teukam, Dominique Ballutaud
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Patent number: 7361540Abstract: Certain aspects of a method for reducing noise disturbing at least one signal in an electronic device may comprise shielding a first layer doped with a first dopant from a signaling layer employing a second layer doped with a second dopant. A first signaling component of the signaling layer may be coupled to the second layer and a second signaling component of the signaling layer may be coupled to the second layer. The second layer may be coupled to the first layer, and this reduces the signal disturbing noise in the electronic device. Shielding the first layer from the signaling layer may comprise disposing the second layer between the first layer and the signaling layer. Shielding the first layer from the signaling layer may comprise disposing a deep N-well between the first layer and the signaling layer.Type: GrantFiled: January 7, 2005Date of Patent: April 22, 2008Assignee: Broadcom CorporationInventor: Ichiro Fujimori
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Patent number: 7341787Abstract: The invention relates to a process for producing highly doped semiconductor wafers, in which at least two dopants which are electrically active and belong to the same group of the periodic system of the elements are used for the doping. The invention also relates to a semiconductor wafer which is free of dislocations and is doped with at least two electrically active dopants which belong to the same group of the periodic system of the elements.Type: GrantFiled: January 26, 2005Date of Patent: March 11, 2008Assignee: Siltronic AGInventors: Rupert Krautbauer, Erich Gmeilbauer, Robert Vorbuchner, Martin Weber
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Patent number: 7314794Abstract: A method of fabricating a high-performance planar back-gate CMOS structure having superior short-channel characteristics and reduced capacitance using processing steps that are not too lengthy or costly is provided. Also provided is a high-performance planar back-gate CMOS structure that is formed utilizing the method of the present invention. The method includes forming an opening in an upper surface of a substrate. Thereafter, a dopant region is formed in the substrate through the opening. In accordance with the inventive method, the dopant region defines a back-gate conductor of the inventive structure. Next, a front gate conductor having at least a portion thereof is formed within the opening.Type: GrantFiled: August 8, 2005Date of Patent: January 1, 2008Assignee: International Business Machines CorporationInventor: Edward J. Nowak
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Patent number: 7250312Abstract: It is an object of the present invention to provide a doping apparatus, a doping method, and a method for fabricating a thin film transistor that can carry out doping to the carrier concentration which is optimum for obtaining the desired electric characteristic non-destructively and in an easy manner. In accordance with the present invention, an electric characteristic of a semiconductor element (threshold voltage in a transistor and the like) is correctly and precisely monitored by using a contact angle, and is controlled by controlling a doping method. In addition, the present invention can be momentarily acquired information by in-situ monitoring the characteristic and can be fed back without a time lag.Type: GrantFiled: August 4, 2004Date of Patent: July 31, 2007Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Junichi Koezuka, Naoto Yamade
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Patent number: 7232744Abstract: The present invention provides a method for implanting a dopant in a substrate and a method for manufacturing a semiconductor device. The method for implanting a dopant, among other steps, including tilting a substrate (310) located on or over an implant platen (305) about an axis in a first direction with respect to an implant source (320) and implanting a portion of an implant dose within the substrate (310) tilted in the first direction. The method further includes tilting the substrate (310) having already been tilted in the first direction about the axis in a second opposite direction, and implanting at least a portion of the implant dose within the substrate (310) tilted in the second opposite direction.Type: GrantFiled: October 1, 2004Date of Patent: June 19, 2007Assignee: Texas Instruments IncorporatedInventors: Said Ghneim, James D. Bernstein, Lance S. Robertson, Jiejie Xu, Jeffrey Loewecke
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Patent number: 7176484Abstract: The present invention provides a substrate having thereon a patterned small molecule organic semiconductor layer. The present invention also provides a method and a system for the production of the substrate having thereon a patterned small molecule organic semiconductor layer. The substrate with the patterned small molecule organic semiconductor layer is prepared by exposing a region of a substrate having thereon a film of a precursor of a small organic molecule to energy from an energy source to convert the film of a precursor of a small organic molecule to a patterned small molecule organic semiconductor layer.Type: GrantFiled: December 9, 2002Date of Patent: February 13, 2007Assignee: International Business Machines CorporationInventors: Ali Afzali-Ardakani, Hendrik Hamann, James A Lacey, David R Medeiros, Praveen Chaudhari, Robert Von Gutfeld
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Patent number: 7148131Abstract: A method for implanting ions in a semiconductor is disclosed. The method includes implanting indium ions into a substrate of a semiconductor material of the semiconductor device for a first time period. The method also includes implanting boron ions into the substrate for a second time period, wherein the first time period is initiated prior to the second time period.Type: GrantFiled: August 23, 2002Date of Patent: December 12, 2006Assignee: LSI Logic CorporationInventors: Agajan Suvkhanov, Mohammad Mirabedini
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Patent number: 6977204Abstract: The present invention provides a method for forming a contact plug in a semiconductor device capable of preventing an increase of contact resistance caused by a decrease in dopant concentration and suppressing diffusions of dopants implanted into the contact. The dopants are doped in a manner to allow the conductive layer to have different doping distributions with respect to a thickness. Particularly, the dopants are doped until reaching a target deposition thickness by gradually increasing a concentration of the dopants from a first concentration to a second concentration for an interval from an initial deposition of the conductive layer to the target deposition thickness, and the second concentration is consistently maintained throughout for an interval from the target deposition thickness to a complete deposition thickness.Type: GrantFiled: July 8, 2003Date of Patent: December 20, 2005Assignee: Hynix Semiconductor Inc.Inventor: Sung-Jae Joo
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Patent number: 6872643Abstract: A method of manufacturing a semiconductor device includes forming a layer over a substrate, and doping the layer with a dopant, after which the layer is laser thermal annealed. The layer can be a nitride, an oxide, or a polysilicon layer. The dopants can be arsenic, phosphorous, boron, or nitrogen. During the laser thermal annealing, certain portions of a surface of the semiconductor device are laser thermal annealed and other portions of a surface of the semiconductor device are not exposed. Also, the surface of the layer is smoother after the laser thermal annealing.Type: GrantFiled: March 5, 2003Date of Patent: March 29, 2005Assignee: Advanced Micro Devices, Inc.Inventors: Arvind Halliyal, Nicholas H. Tripsas, Mark T. Ramsbey
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Patent number: 6872628Abstract: A gate structure (4), an LDD region (6) and a sidewall (7) are provided in this order. Arsenic ions (8) are thereafter implanted into the upper surface of a silicon substrate (1) by tilted implantation. The next step is annealing for forming an MDD region (9) in the upper surface of the silicon substrate (1). The MDD region (9) and the gate structure (4) do not overlap one another in plan view. Further, the MDD region (9) formed into a depth shallower than that of the LDD region (6) is higher in concentration than the LDD region (6). Thereafter a source/drain region (11) higher in concentration than the MDD region (9) is provided by vertical implantation into a depth greater than that of the LDD region (6).Type: GrantFiled: September 18, 2002Date of Patent: March 29, 2005Assignee: Renesas Technology Corp.Inventors: Masayoshi Shirahata, Yukio Nishida
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Publication number: 20040235278Abstract: A method to create a low resistivity P+in-situ doped polysilicon film at low temperature from SiH4 and BCl3 with no anneal required. At conventional dopant concentrations using these source gases, as deposition temperature decreases below about 550 degrees C., deposition rate decreases and sheet resistance increases, making production of a high-quality film impossible. By flowing very high amounts of BCl3, however, such that the concentration of boron atoms in the resultant film is about 7×1020 or higher, the deposition rate and sheet resistance are improved, and a high-quality film is produced.Type: ApplicationFiled: January 30, 2004Publication date: November 25, 2004Inventors: S. Brad Herner, Mark H. Clark
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Patent number: 6815318Abstract: When an opening diameter of a top end of a substantially column-shaped contact hole is S1, an opening diameter of a top end of a substantially column-shaped contact hole is T1, and a thickness of a silicon insulating layer is h, then contact holes are formed so as to satisfy the following conditional expression 1. T1/h<tan &thgr;1<S1/h (expression 1). With this formation method, a manufacturing method of a semiconductor device can be provided which does not need covering processing using a photolithography technique when impurity regions of different conductivity types are formed using contact holes.Type: GrantFiled: January 24, 2003Date of Patent: November 9, 2004Assignee: Renesas Technology Corp.Inventors: Eiji Hasunuma, Akira Matsumura
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Patent number: 6812079Abstract: An apparatus and method for a semiconductor device with reduced gate capacitance. Specifically, an n-channel or p-channel junction field effect transistor (JFET) is described including an appropriately doped substrate forming a drain region, an epitaxial layer formed on top of the substrate, a control structure including a gate region implanted into the epitaxial layer, a source region sharing a p-n junction with the gate region, and an altered epitaxial region. The altered epitaxial region is formed by implanting either n− or p− dopants directly below the gate region of either the n-channel or p-channel JFET for widening a depletion region surrounding the gate region. The enlarged depletion region reduces the gate capacitance of the JFET between the gate and drain regions.Type: GrantFiled: October 1, 2003Date of Patent: November 2, 2004Assignee: Lovoltech, Inc.Inventor: Pete L. Pegler
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Patent number: 6797596Abstract: A method used during the formation of a semiconductor device reduces ion channeling during implantation of the wafer. The method comprises providing a semiconductor wafer and an unetched transistor gate stack assembly over the wafer. The unetched transistor gate stack assembly comprises a gate oxide layer, a control gate layer, a metal layer, and a dielectric capping layer. A patterned photoresist layer is formed over the unetched transistor gate stack assembly, then each of the capping layer, the metal layer, the control gate layer, and the gate oxide layer is etched to form a plurality of laterally-spaced transistor gate stacks. A screening layer is formed overlying the semiconductor wafer between the transistor gate stacks. A dopant is implanted into the semiconductor wafer through the screening layer, then the screening layer is removed.Type: GrantFiled: August 29, 2002Date of Patent: September 28, 2004Assignee: Micron Technology, Inc.Inventors: Fawad Ahmed, Jigish D. Trivedi, Suraj J Mathew
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Patent number: 6794277Abstract: A lower concentration impurity diffusion region can be formed under excellent control, even when a low heat-resistant substrate is used. At the time of doping a semiconductor layer, a mask such as sidewalls (24) where an energy beam passes through, is formed on a part of a surface of a semiconductor layer (21), dopant ions (25) are adsorbed on the surface of the semiconductor layer (21) except a region in which the mask is formed, and an energy beam EBL is irradiated onto the semiconductor layer (21) having the formed mask to introduce the dopant ions into the semiconductor layer (21). In the lower part of the mask such sidewalls (24), diffusion in transverse direction occurs and lower concentration impurity diffusion regions can be formed in excellent reproducibility under excellent control.Type: GrantFiled: October 23, 2002Date of Patent: September 21, 2004Assignee: Sony CorporationInventors: Akio Machida, Setsuo Usui, Dharam Pal Gosain
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Patent number: 6716690Abstract: Multiple dopant implantations are performed on a FinFET device to thereby distribute the dopant in a substantially uniform manner along a vertical depth of the FinFET in the source/drain junction. Each of the multiple implantations may be performed at different tilt angles.Type: GrantFiled: March 12, 2003Date of Patent: April 6, 2004Assignee: Advanced Micro Devices, Inc.Inventors: Haihong Wang, Judy Xilin An, Bin Yu
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Publication number: 20030224588Abstract: A method for manufacturing a semiconductor device includes: forming a trench in a predetermined layer of a semiconductor substrate; heating the substrate having the trench in a non-oxidizing and non-nitridizing atmosphere containing a dopant or a compound that includes the dopant in order to smooth the surfaces defining the trench and to maintain the dopant concentration in the predetermined layer to be a predetermined concentration before the heating is treated; and forming an epitaxially grown film to fill the trench. The conductivity type of the dopant contained in the non-oxidizing and non-nitridizing atmosphere is the same as that of the dopant initially contained in the predetermined layer.Type: ApplicationFiled: June 2, 2003Publication date: December 4, 2003Inventors: Shoichi Yamauchi, Hitoshi Yamaguchi
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Patent number: 6645839Abstract: A method for improving a doping profile using gas phase doping is described. In the method, silicon nitride and/or products of decomposition from a silicon nitride deposition are introduced in a process chamber before or during the actual gas phase doping. This allows the doping profile to be significantly improved.Type: GrantFiled: May 6, 2002Date of Patent: November 11, 2003Assignee: Infineon Technologies AGInventors: Moritz Haupt, Anja Morgenschweis, Dietmar Ottenwälder, Uwe Schröder
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Patent number: 6616786Abstract: The invention is directed to a returnable plastic crate provided on at least one surface with an ink only label that is removable without destructive treatment of the said surface, said label being adhered to said at least one surface by an activated adhesive layer.Type: GrantFiled: February 27, 2002Date of Patent: September 9, 2003Assignee: Heineken Technical Services B.V.Inventors: Patrick Johannes Blom, Erwin Anton Rosens, Thomas Lynn Brandt, Daniel Nathaniel Wilkens
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Patent number: 6602768Abstract: An improved MOS-gated power device 300 with a substrate 101 having an upper layer 101a of doped monocrystalline silicon of a first conduction type that includes a doped well region 107 of a second conduction type. The substrate further includes at least one heavily doped source region 111 of the first conduction type disposed in a well region 107 at an upper surface of the upper layer, a gate region 106 having a conductive material 105 electrically insulated from the source region by a dielectric material, a patterned interlevel dielectric layer 112 on the upper surface overlying the gate and source regions 114, and a heavily doped drain region of the first conduction type 115. The improvement includes body regions 301 containing heavily doped polysilicon of the second conduction type disposed in a well region 107 at the upper surface of the monocrystalline substrate.Type: GrantFiled: January 10, 2002Date of Patent: August 5, 2003Assignee: Fairchild Semiconductor CorporationInventors: Christopher B. Kocon, Rodney S. Ridley, Thomas E. Grebs
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Patent number: 6555451Abstract: A method is provided for making ultra-shallow diffused junctions using an elemental dopant. A semiconductor wafer is cleaned for providing a clean reaction surface. The cleaned wafer in loaded onto a stage located in a doping system. A quantity of elemental dopant atoms are placed in a partially enclosed elemental dopant source which is within a secondary vacuum enclosure. A quantity of the elemental dopant atoms having thermal velocities are deposited onto a surface of the wafer, and the wafer is heated for diffusing the elemental dopant into the wafer. In one embodiment, the heating is conducted by heating the wafer in ultra-high vacuum for diffusing the portion of the doping atoms into the wafer, and the deposition and heating occur simultaneously. In another embodiment, the surface of the wafer is hydrogen terminated, the wafer is removed from the UHV system, and the heating of the wafer is conducted outside of the UHV system by heating the wafer in a furnace.Type: GrantFiled: September 28, 2001Date of Patent: April 29, 2003Assignee: The United States of America as represented by the Secretary of the NavyInventors: Francis J. Kub, Karl D. Hobart
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Publication number: 20030008499Abstract: According to the present method of manufacturing a semiconductor device, since a contact hole has its opening gradually and continuously made smaller toward the lower interconnection layer, a cavity, which has been produced conventionally, would not be produced in a barrier metal layer and a metal interconnection layer formed along the side wall of the contact hole. As a result, even when the reduction in size of the semiconductor has progressed, it is possible to provide a method of manufacturing semiconductor device having its contact hole in a proper shape, and to provide such a semiconductor device.Type: ApplicationFiled: May 1, 2002Publication date: January 9, 2003Applicant: Mitsubishi Denki Kabushiki KaishaInventor: Heiji Kobayashi
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Patent number: 6503841Abstract: The invention includes a method of etching silicon dioxide, comprising doping a layer of silicon dioxide to form a layer of doped silicon dioxide and etching the doped silicon dioxide layer with phosphoric acid.Type: GrantFiled: July 7, 2000Date of Patent: January 7, 2003Assignee: Agere Systems Inc.Inventors: Robert William Criscuolo, Charles Walter Pearce
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Patent number: 6498079Abstract: Deep profile and highly doped impurity regions can be formed by diffusing from a solid source or doped silicon glass and using a patterned nitride layer. An oxide etch stop and polysilicon sacrificial layer are left in place in the patterned regions and the dopant is diffused through those layers. The polysilicon provides sacrificial silicon that serves to prevent the formation of boron silicon nitride on the substrate surface and also protects the oxide layer during etching of the silicon glass layer. The oxide layer then acts as an etch stop during removal of the polysilicon layer. In this way, no damage done to the substrate surface during the diffusion or subsequent etch steps and the need for expensive ion implanter steps is avoided.Type: GrantFiled: July 27, 2000Date of Patent: December 24, 2002Assignee: STMicroelectronics, Inc.Inventors: Frank Randolph Bryant, Kenneth Wayne Smiley
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Patent number: 6486064Abstract: A method of forming junctions in a semiconductor substrate, where a gate dielectric layer is grown on the semiconductor substrate, a gate electrode layer is deposited on the gate dielectric layer, and a sacrificial layer is formed on the gate electrode layer. The sacrificial layer is patterned with a material to cover portions of the sacrificial layer and expose portions of the sacrificial layer. The exposed portions of the sacrificial layer are etched to remove the exposed portions of the sacrificial layer and expose portions of the gate electrode layer. The exposed portions of the gate electrode layer are etched to expose portions of the gate dielectric layer and form a gate electrode having exposed vertical faces. The sacrificial layer and the exposed portions of the gate dielectric layer are impregnated with a first species that inhibits diffusion of oxygen through the sacrificial layer and the exposed portions of the gate dielectric layer.Type: GrantFiled: September 26, 2000Date of Patent: November 26, 2002Assignee: LSI Logic CorporationInventor: Helmut Puchner
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Patent number: 6444550Abstract: A semiconductor device having a retrograde channel profile is achieved by forming a retrograde impurity region in the surface portion of a semiconductor substrate, and subsequently forming a semiconductor layer on the retrograde impurity region at a predetermined thickness. The thickness of the semiconductor layer is controlled to localize the retrograde impurity region and its impurity concentration peak at a predetermined depth, thereby reducing the device's susceptibility to “reverse short channel effects.Type: GrantFiled: August 17, 2000Date of Patent: September 3, 2002Assignee: Advanced Micro Devices, Inc.Inventors: Ming-Yin Hao, Emi Ishida
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Patent number: 6432783Abstract: The manufacturing method produces a semiconductor in which current is not generated during the off state by reducing the electric field at the corner of an active region. The method includes patterning a gate material layer on a predetermined portion on the active region. The mask has an open region which exposes the active region but does not expose the filed region. A gate electrode and source/drain regions are formed by doping impurities into the exposed gate material layer and the active region.Type: GrantFiled: November 28, 2000Date of Patent: August 13, 2002Assignee: Hyundai Electronics Industries Co., Ltd.Inventor: Hi Deok Lee