Post Treatment Of Insulating Layer (epo) Patents (Class 257/E21.489)
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Patent number: 11437230Abstract: Disclosed herein is a high throughput method for providing directional protection to a three dimensional feature on a substrate by forming a multi-layer amorphous carbon-containing coating with tunable conformality thereon. Forming the multi-layer amorphous carbon-containing coating with tunable conformality includes depositing a base layer onto a horizontal surface of the three dimensional features, and a second layer over the base layer and onto a first portion of a vertical or inclined surface of the three dimensional feature. The base layer includes a first material with a first sticking coefficient and the second layer includes a second material with a second sticking coefficient that is smaller than the first sticking coefficient. The first material includes no fluorine or less fluorine than the second material. Also disclosed herein is a method of manufacturing a three dimensional device as well as three dimensional devices.Type: GrantFiled: April 6, 2020Date of Patent: September 6, 2022Assignee: APPLIED MATERIALS, INC.Inventors: Wei Wu, Feng Zhang, Xiawan Yang, Jinhan Choi, Anisul Haque Khan
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Patent number: 8836088Abstract: A semiconductor structure includes a substrate, a conductive feature over the substrate, a conductive plug structure contacting a portion of an upper surface of the conductive feature, a first etch stop layer over another portion of the upper surface of the conductive feature, and a second etch stop layer over the first etch stop layer. The first etch stop layer is a doped etch stop layer. The first etch stop layer is to function as an etch stop layer during a predetermined etching process for etching the second etch stop layer.Type: GrantFiled: July 24, 2013Date of Patent: September 16, 2014Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Mei-Hsuan Lin, Chih-Hsun Lin, Chih-Kang Chao, Ling-Sung Wang
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Patent number: 8809161Abstract: Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.Type: GrantFiled: July 3, 2013Date of Patent: August 19, 2014Assignee: Novellus Systems, Inc.Inventors: Vishal Gauri, Raashina Humayun, Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker
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Patent number: 8748274Abstract: A method for fabricating a semiconductor device includes: forming a GaN-based semiconductor layer on a substrate; forming a gate insulating film of aluminum oxide on the GaN-based semiconductor layer at a temperature equal to or lower than 450° C.; forming a protection film on an upper surface of the gate insulating film; performing a process with an alkaline solution in a state in which the upper surface of the gate insulating film is covered with the protection film; and forming a gate electrode on the gate insulating film.Type: GrantFiled: December 17, 2009Date of Patent: June 10, 2014Assignee: Sumitomo Electric Device Innovations, Inc.Inventors: Ken Nakata, Seiji Yaegashi
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Patent number: 8658490Abstract: Generally, the present disclosure is directed to techniques for improving the reliability of semiconductor devices with high-k gate dielectric layers by passivating point defects during the gate stack formation. One illustrative method disclosed herein includes performing a plurality of material deposition cycles to form a high-k dielectric layer above a semiconductor material layer, and introducing a passivating material into a gaseous precursor that is used for forming the high-k dielectric layer during at least one of the plurality of material deposition cycles.Type: GrantFiled: April 4, 2012Date of Patent: February 25, 2014Assignee: GLOBALFOUNDRIES Inc.Inventors: Elke Erben, Martin Trentzsch, Richard J. Carter
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Patent number: 8481403Abstract: Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.Type: GrantFiled: January 4, 2011Date of Patent: July 9, 2013Assignee: Novellus Systems, Inc.Inventors: Vishal Gauri, Raashina Humayun, Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker
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Patent number: 8377818Abstract: The present invention is an aftertreatment method further applied to an amorphous carbon film to which a treatment including heating is performed after the film has been formed on a substrate. The treatment of preventing oxidation of the amorphous carbon film is performed immediately after the treatment including heating.Type: GrantFiled: July 4, 2007Date of Patent: February 19, 2013Assignee: Tokyo Electron LimitedInventor: Hiraku Ishikawa
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Patent number: 8313994Abstract: A method is provided for forming a high-k gate stack with a reduced effective oxide thickness (EOT) for a semiconductor device. The method includes providing a silicon-containing substrate, forming an interface layer on the silicon-containing substrate, where the interface layer has a first equivalent oxide thickness, depositing a first high-k film on the interface layer, and heat-treating the first high-k film and the interface layer at a temperature that forms a modified interface layer, where the modified interface layer has a second equivalent oxide thickness that is equal to or lower than the first equivalent oxide thickness. The method further includes depositing a second high-k film on the modified interface layer. According to one embodiment, the first high-k film includes lanthanum oxide and the second high-k film includes hafnium silicate.Type: GrantFiled: March 8, 2010Date of Patent: November 20, 2012Assignee: Tokyo Electron LimitedInventor: Robert D Clark
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Patent number: 8120184Abstract: The invention includes methods of forming layers conformally over undulating surface topographies associated with semiconductor substrates. The undulating surface topographies can first be exposed to one or more of titanium oxide, neodymium oxide, yttrium oxide, zirconium oxide and vanadium oxide to treat the surfaces, and can be subsequently exposed to a material that forms a layer conformally along the treated surfaces. The material can, for example, comprise one or both of aluminum silane and aluminum silazane. The invention also includes semiconductor constructions having conformal layers formed over liners containing one or more of titanium oxide, yttrium oxide, zirconium oxide and vanadium oxide.Type: GrantFiled: May 25, 2010Date of Patent: February 21, 2012Assignee: Micron Technology, Inc.Inventor: John Smythe
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Patent number: 7888233Abstract: Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.Type: GrantFiled: March 25, 2009Date of Patent: February 15, 2011Assignee: Novellus Systems, Inc.Inventors: Vishal Gauri, Raashina Humayun, Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker
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Patent number: 7824990Abstract: A semiconductor structure having a high-k dielectric and its method of manufacture is provided. A method includes forming a first dielectric layer over the substrate, a metal layer over the first dielectric layer, and a second dielectric layer over the metal layer. A method further includes annealing the substrate in an oxidizing ambient until the three layers form a homogenous high-k dielectric layer. Forming the first and second dielectric layers comprises a non-plasma deposition process such atomic layer deposition (ALD), or chemical vapor deposition (CVD). A semiconductor device having a high-k dielectric comprises an amorphous high-k dielectric layer, wherein the amorphous high-k dielectric layer comprises a first oxidized metal and a second oxidized metal. The atomic ratios of all oxidized metals are substantially uniformly within the amorphous high-k dielectric layer.Type: GrantFiled: January 10, 2006Date of Patent: November 2, 2010Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Vincent S. Chang, Fong-Yu Yen, Peng-Soon Lim, Jin Ying, Hun-Jan Tao
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Publication number: 20100242844Abstract: A holder for semiconductor manufacturing equipment is provided, in which electrical leakage and sparks do not occur across the electrode terminals and lead wires to supply power to a resistive heating element embedded in a holder, and the thermal uniformity in the holder is within ±1.0%. The holder for semiconductor manufacturing equipment, that is provided in a chamber to which reactive gas is supplied, comprises a ceramic holder 1 which holds a treated material 10 on a surface thereof and is provided with a resistive heating element 2 for heating the material to be treated, and a support member 6 one end of which supports the ceramic holder 1 at a position other than the surface holding the material to be treated, and the other end of which is fixed to the chamber.Type: ApplicationFiled: March 31, 2010Publication date: September 30, 2010Applicant: Sumitono Electric Industries, Ltd.Inventors: Akira KUIBIRA, Masuhiro Natsuhara, Hirohiko Nakata
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Patent number: 7790634Abstract: Methods of making a silicon oxide layer on a substrate are described. The methods may include forming the silicon oxide layer on the substrate in a reaction chamber by reacting an atomic oxygen precursor and a silicon precursor and depositing reaction products on the substrate. The atomic oxygen precursor is generated outside the reaction chamber. The methods also include heating the silicon oxide layer at a temperature of about 600° C. or less, and exposing the silicon oxide layer to an induced coupled plasma. Additional methods are described where the deposited silicon oxide layer is cured by exposing the layer to ultra-violet light, and also exposing the layer to an induced coupled plasma.Type: GrantFiled: May 25, 2007Date of Patent: September 7, 2010Assignee: Applied Materials, IncInventors: Jeffrey C. Munro, Srinivas D. Nemani
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Patent number: 7781352Abstract: A method of forming an inorganic silazane-based dielectric film includes: introducing a gas constituted by Si and H and a gas constituted by N and optionally H into a reaction chamber where an object is placed; controlling a temperature of the object at ?50° C. to 50° C.; and depositing by plasma reaction a film constituted by Si, N, and H containing inorganic silazane bonds.Type: GrantFiled: June 6, 2007Date of Patent: August 24, 2010Assignee: ASM Japan K.K.Inventors: Atsuki Fukazawa, Nobuo Matsuki, Jeongseok Ha
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Patent number: 7772132Abstract: A method for forming a zirconium oxide (ZrO2) layer on a substrate in a chamber includes controlling a temperature of the substrate; and repeating a unit cycle of an atomic layer deposition (ALD) method. The unit cycle includes supplying a zirconium (Zr) source into a chamber, parts of the Zr source being adsorbed into a surface of the substrate; purging non-adsorbed parts of the Zr source remaining inside the chamber; supplying a reaction gas for reacting with the adsorbed parts of the Zr source; and purging non-reacted parts of the reaction gas remaining inside the chamber and reaction byproducts, wherein the temperature of the substrate and a concentration of the reaction gas are controlled such that the ZrO2 layer is formed with a tetragonal structure.Type: GrantFiled: June 29, 2006Date of Patent: August 10, 2010Assignee: Hynix Semiconductor, Inc.Inventors: Deok-Sin Kil, Han-Sang Song, Seung-Jin Yeom, Ki-Seon Park, Jae-Sung Roh, Jin-Hyock Kim
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Patent number: 7737559Abstract: The invention includes methods of forming layers conformally over undulating surface topographies associated with semiconductor substrates. The undulating surface topographies can first be exposed to one or more of titanium oxide, neodymium oxide, yttrium oxide, zirconium oxide and vanadium oxide to treat the surfaces, and can be subsequently exposed to a material that forms a layer conformally along the treated surfaces. The material can, for example, comprise an aluminum-containing compound and one or both of silane and silazane. The invention also includes semiconductor constructions having conformal layers formed over liners containing one or more of titanium oxide, yttrium oxide, zirconium oxide and vanadium oxide.Type: GrantFiled: October 31, 2006Date of Patent: June 15, 2010Assignee: Micron Technology, Inc.Inventor: John Smythe
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Patent number: 7678688Abstract: A method for forming a metal interconnection in an image sensor includes forming a first interlayer dielectric (ILD) layer having a contact plug over a substrate, forming a diffusion barrier layer over the first ILD layer, performing a forming gas annealing, forming a second ILD layer over the diffusion barrier layer, etching the second ILD layer and the diffusion barrier layer to form a trench, forming a conductive layer to fill the trench, and planarizing the conductive layer to form a metal interconnection electrically connected to the contact plug.Type: GrantFiled: December 20, 2006Date of Patent: March 16, 2010Inventor: Kyeong-Keun Choi
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Patent number: 7678710Abstract: The present invention generally provides methods and apparatuses that are adapted to form a high quality dielectric gate layer on a substrate. Embodiments contemplate a method wherein a metal plasma treatment process is used in lieu of a standard nitridization process to form a high dielectric constant layer on a substrate. Embodiments further contemplate an apparatus adapted to “implant” metal ions of relatively low energy in order to reduce ion bombardment damage to the gate dielectric layer, such as a silicon dioxide layer and to avoid incorporation of the metal atoms into the underlying silicon. In general, the process includes the steps of forming a high-k dielectric and then terminating the surface of the deposited high-k material to form a good interface between the gate electrode and the high-k dielectric material.Type: GrantFiled: December 20, 2006Date of Patent: March 16, 2010Assignee: Applied Materials, Inc.Inventors: Thai Cheng Chua, Steven Hung, Patricia M. Liu, Tatsuya Sato, Alex M. Paterson, Valentin Todorov, John P. Holland
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Publication number: 20100062612Abstract: The present invention is an aftertreatment method further applied to an amorphous carbon film to which a treatment including heating is performed after the film has been formed on a substrate. The treatment of preventing oxidation of the amorphous carbon film is performed immediately after the treatment including heating.Type: ApplicationFiled: July 4, 2007Publication date: March 11, 2010Applicant: Tokyo Electron LimitedInventor: Hiraku Ishikawa
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Publication number: 20090294922Abstract: Provided is an organic silicon oxide fine particle capable of satisfying an expected dielectric constant and mechanical strength and having excellent chemical stability for obtaining a high-performance porous insulating film.Type: ApplicationFiled: May 27, 2009Publication date: December 3, 2009Inventors: Yoshitaka Hamada, Fujio Yagihashi, Takeshi Asano, Hideo Nakagawa, Masaru Sasago
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Publication number: 20090286399Abstract: A substrate processing method includes performing an etching process on a low dielectric constant film disposed on a substrate, thereby forming a predetermined pattern thereon; denaturing a remaining substance to be soluble in a predetermined liquid after the etching process; dissolving and removing the substance thus denatured, by supplying the predetermined liquid thereon; then, performing a silylation process on a surface of the low dielectric constant film, by supplying a silylation agent thereon, after said dissolving and removing the substance denatured; and baking the substrate after the silylation process.Type: ApplicationFiled: September 4, 2007Publication date: November 19, 2009Inventors: Yasushi Fujii, Kazuki Kosai
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Patent number: 7589027Abstract: Provided is a method of manufacturing a semiconductor device. A first gate oxide layer is formed on a semiconductor substrate in which a core region and an input/output region are defined. The first gate oxide layer of the core region is selectively removed, and a second gate oxide layer is formed under the first gate oxide layer of the input/output region and on the semiconductor substrate of the core region. Nitrogen annealing is performed to form a nitrogen-rich oxide layer under the second gate oxide layer. An additional thermal process is performed to diffuse nitrogen segregated on an interface between the first gate oxide layer and the second gate oxide layer of the input/output region to a surface of the semiconductor substrate. Impurities generated during the additional thermal process are discharged to the outside.Type: GrantFiled: December 26, 2006Date of Patent: September 15, 2009Assignee: Dongbu Electronics Co., Ltd.Inventor: Young Seong Lee
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Publication number: 20090176378Abstract: A manufacturing method of a dual damascene structure is provided. First, a first dielectric layer, a second dielectric layer, and a mask layer are formed. A first trench structure is formed in the mask layer. A via structure is formed in the mask layer, the second dielectric layer, and the first dielectric layer. A portion of the second dielectric layer is then removed, so as to transform the first trench structure into a second trench structure. Here, a bottom of the second trench structure exposes the first dielectric layer.Type: ApplicationFiled: March 18, 2009Publication date: July 9, 2009Applicant: UNITED MICROELECTRONICS CORP.Inventor: Chih-Jung Wang
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Patent number: 7528042Abstract: A method for forming a dual gate oxide layer, including the steps of: a) forming a gate oxide layer on a semiconductor substrate; and b) increasing a thickness of a part of the gate oxide layer by performing a decoupled plasma treatment. Additional heat processes are not necessary because the dual gate oxide layer is formed with the decoupled plasma. Also, the channel characteristic of the semiconductor device can be ensured because the silicon substrate is not damaged. Furthermore, because the threshold voltage in the cell region is increased without additional channel ion implantation, the electrical characteristic of the semiconductor device can be enhanced.Type: GrantFiled: June 28, 2006Date of Patent: May 5, 2009Assignee: Hynix Semiconductor Inc.Inventors: Kwan-Yong Lim, Heung-Jae Cho, Dae-Gyu Park, Tae-Ho Cha, In-Seok Yeo
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Publication number: 20090108414Abstract: A wafer has a rare earth oxide layer disposed, typically sprayed, on a substrate. It is useful as a dummy wafer in a plasma etching or deposition system.Type: ApplicationFiled: October 27, 2008Publication date: April 30, 2009Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Toshihiko TSUKATANI, Takao MAEDA, Junichi NAKAYAMA, Hirofumi KAWAZOE, Masaru KONYA, Noriaki HAMAYA, Hajime NAKANO
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Patent number: 7521378Abstract: Semiconductor devices, structures and systems that utilize a polysilazane-based silicon oxide layer or fill, and methods of making the oxide layer are disclosed. In one embodiment, a polysilazane solution is deposited on a substrate and processed with ozone in a wet oxidation at low temperature to chemically modify the polysilazane material to a silicon oxide layer.Type: GrantFiled: July 1, 2004Date of Patent: April 21, 2009Assignee: Micron Technology, Inc.Inventors: Janos Fucsko, John A Smythe, III, Li Li, Grady S Waldo
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Publication number: 20080318437Abstract: A semiconductor device is manufactured by forming a low dielectric constant layer on a semiconductor substrate which is formed with metal lines; implementing primary ultraviolet treatment of the low dielectric constant layer; forming a capping layer on the low dielectric constant layer having undergone the primary ultraviolet treatment; and implementing secondary ultraviolet treatment of the low dielectric constant layer including the capping layer.Type: ApplicationFiled: August 6, 2007Publication date: December 25, 2008Inventors: Chan Bae Kim, Jong Min Lee, Chae O Chung, Hyeon Ju An, Hyo Seok Lee, Sung Kyu Min
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Patent number: 7462561Abstract: A supercritical fluid such as CO2 cleans an opening formed in a Si-containing dielectric material and removes polymeric and organic residue produced by the etching process used to form the opening. The opening may be a contact, via or other opening and may include a cross-sectional area of less than 0.2 or 0.1 micron square. Atomic layer chemical vapor deposition (ALCVD) is used to form a thin barrier layer within the opening after the supercritical cleaning. A conductive material is formed over the barrier layer to provide a contact structure with improved contact resistance in VLSI devices.Type: GrantFiled: January 27, 2005Date of Patent: December 9, 2008Inventors: David Lu, Horng-Huei Tseng, Syun-Ming Jang
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Patent number: 7425761Abstract: A method of manufacturing a dielectric layer for a capacitor including sequentially supplying and purging a first and a second precursor material for a first and a second predetermined amount of time, respectively, in an initial cycle, sequentially supplying and purging the first and the second precursor materials for a third predetermined amount of time, which is shorter than the first and/or second predetermined amount of time, in a post cycle, which follows the initial cycle, and repeating the initial and post cycles to form a dielectric layer having a predetermined thickness.Type: GrantFiled: October 10, 2006Date of Patent: September 16, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyoung Choi, Sung-ho Kang, Jung-hee Chung, Seog-min Lee, Jong-bom Seo, Young-min Kim
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Publication number: 20080185655Abstract: A method for forming a semiconductor device is provided. The method comprises steps of providing a substrate having a first-conductive-type transistor and a second-conductive-type transistor formed thereon and then forming a stress layer over the substrate to conformally cover the first-conductive-type transistor and the second-conductive-type transistor. A cap layer is formed on the stress layer over the first-conductive-type transistor. A modification process is performed. The cap layer is removed.Type: ApplicationFiled: February 2, 2007Publication date: August 7, 2008Applicant: UNITED MICROELECTRONICS CORP.Inventors: Shao-Ta Hsu, Teng-Chun Tsai, Neng-Kuo Chen, Hsiu-Lien Liao, Cheng-Han Wu, Wen-Han Hung
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Publication number: 20080057739Abstract: A method for improving high-? gate dielectric film (104) properties. The high-? film (104) is subjected to a two step anneal sequence. The first anneal is performed in a reducing ambient (106) with low partial pressure of oxidizer to promote film relaxation and increase by-product diffusion and desorption. The second anneal is performed in an oxidizing ambient (108) with a low partial pressure of reducer to remove defects and impurities.Type: ApplicationFiled: October 25, 2007Publication date: March 6, 2008Applicant: Texas Instruments IncorporatedInventors: Luigi Colombo, James Chambers, Mark Visokay, Antonio Rotondaro
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Patent number: 7303962Abstract: A complementary metal-oxide-semiconductor (CMOS) device comprising a substrate, a first type of metal-oxide-semiconductor (MOS) transistor, a second type of MOS transistor, an etching stop layer, a first stress layer and a second stress layer is provided. The substrate has a first and a second active region. The first active region is isolated from the second active region through an isolation structure. The first type of MOS transistor is disposed in the first active region of the substrate and the second type of MOS transistor is disposed in the second active region of the substrate. The etching stop layer covers conformably the first type of MOS transistor, the second type of MOS transistor and the isolation structure. The first stress layer is disposed on the etching stop layer in the first active region and the second stress layer is disposed on the etching stop layer in the second active region.Type: GrantFiled: November 16, 2005Date of Patent: December 4, 2007Assignee: United Microelectronics Corp.Inventors: Pei-Tu Chou, Min-Chieh Yang, Wen-Han Hung
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Patent number: 7262135Abstract: The invention includes methods of forming layers conformally over undulating surface topographies associated with semiconductor substrates. The undulating surface topographies can first be exposed to one or more of titanium oxide, neodymium oxide, yttrium oxide, zirconium oxide and vanadium oxide to treat the surfaces, and can be subsequently exposed to a material that forms a layer conformally along the treated surfaces. The material can, for example, comprise an aluminum-containing compound and one or both of silane and silazane. The invention also includes semiconductor constructions having conformal layers formed over liners containing one or more of titanium oxide, yttrium oxide, zirconium oxide and vanadium oxide.Type: GrantFiled: September 1, 2005Date of Patent: August 28, 2007Assignee: Micron Technology, Inc.Inventor: John Smythe
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Patent number: 7241706Abstract: Embodiments of the invention provide a relatively hydrophilic layer in a low k dielectric layer. The hydrophilic layer may be formed by exposing the dielectric layer to light having enough energy to break Si—C and C—C bonds but not enough to break Si—O bonds.Type: GrantFiled: September 16, 2004Date of Patent: July 10, 2007Assignee: Intel CorporationInventors: Steven W. Johnston, Nate Baxter
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Patent number: 7157339Abstract: A method for forming a dual gate oxide layer, including the steps of: a) forming a gate oxide layer on a semiconductor substrate; and b) increasing a thickness of a part of the gate oxide layer by performing a decoupled plasma treatment. Additional heat processes are not necessary because the dual gate oxide layer is formed with the decoupled plasma. Also, the channel characteristic of the semiconductor device can be ensured because the silicon substrate is not damaged. Furthermore, because the threshold voltage in the cell region is increased without additional channel ion implantation, the electrical characteristic of the semiconductor device can be enhanced.Type: GrantFiled: November 12, 2002Date of Patent: January 2, 2007Assignee: Hynix Semiconductor Inc.Inventors: Kwan-Yong Lim, Heung-Jae Cho, Dae-Gyu Park, Tae-Ho Cha, In-Seok Yeo
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Publication number: 20060246669Abstract: A method for forming a dual gate oxide layer, including the steps of: a) forming a gate oxide layer on a semiconductor substrate; and b) increasing a thickness of a part of the gate oxide layer by performing a decoupled plasma treatment. Additional heat processes are not necessary because the dual gate oxide layer is formed with the decoupled plasma. Also, the channel characteristic of the semiconductor device can be ensured because the silicon substrate is not damaged. Furthermore, because the threshold voltage in the cell region is increased without additional channel ion implantation, the electrical characteristic of the semiconductor device can be enhanced.Type: ApplicationFiled: June 28, 2006Publication date: November 2, 2006Applicant: HYNIX SEMICONDUCTOR INC.Inventors: Kwan-Yong Lim, Heung-Jae Cho, Dae-Gyu Park, Tae-Ho Cha, In-Seok Yeo