Patents by Inventor Andreas Wich-Glasen
Andreas Wich-Glasen 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: 7294902Abstract: The invention relates to a trench isolation with a self-aligning surface sealing and a fabrication method for said surface sealing. In this case, the surface sealing may have an overlap region of the substrate surface or a receded region into which extends an electrically conductive layer formed on the substrate surface.Type: GrantFiled: July 24, 2002Date of Patent: November 13, 2007Assignee: Infineon Technologies AGInventors: Dietmar Temmler, Andreas Wich-Glasen
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Patent number: 7223651Abstract: A memory cell includes a selection transistor and a trench capacitor. The trench capacitor is filled with a conductive trench filling on which an insulating covering layer is arranged. The insulating covering layer is laterally overgrown, proceeding from the substrate with a selectively grown epitaxial layer. The selection transistor is formed in the selectively grown epitaxial layer, comprises a source region connected to the trench capacitor and a drain region connected to a bit line. The junction depth of the source region is chosen so that the source region reaches as far as the insulating covering layer. Optionally, the thickness of the epitaxial layer can be reduced to a thickness by oxidation and a subsequent etching. Afterwards, a contact trench is etched through the source region down to the conductive trench filling, which trench is filled with a conductive contact and electrically connects the conductive trench filling to the source region.Type: GrantFiled: June 5, 2002Date of Patent: May 29, 2007Assignee: Infineon Technologies, AGInventors: Frank Richter, Dietmar Temmler, Andreas Wich-Glasen
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Patent number: 7129155Abstract: Process for producing a plurality of gate stacks approximately the same height and equidistant on a semiconductor substrate. The process includes providing a gate dielectric on the semiconductor substrate and applying and patterning at least a first layer and a second layer, above the first layer, to the gate dielectric to produce the gate stacks. An oblique implantation of an oxidation-inhibiting implantation species is carried out into two opposite, uncovered side faces of the second of the gate stacks, with respectively adjacent gate stacks serving to shadow the uncovered side faces of the first layer of the gate stacks. Oxidation to simultaneously form a first oxide layer on uncovered side faces of the first layer of the gate stacks and a second oxide layer on uncovered side faces of the second layer of the gate stacks is carried out, the thickness of the first oxide layer being greater than the thickness of the second oxide layer.Type: GrantFiled: August 12, 2004Date of Patent: October 31, 2006Assignee: Infineon Technologies AGInventors: Martin Popp, Andreas Wich-Glasen
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Patent number: 7125778Abstract: A description is given of a method for a selective masking of a structure with a small structure surface with respect to a structure with a larger structure surface. To that end, the structures are filled with a covering layer. The covering layer is formed with a larger thickness above the first structure, which has the larger structure surface, than above the second structure. Afterward, the covering layer is removed by a homogeneous removal method, so that first the structure surface of the second structure is uncovered. A simple self-aligning method for fabricating a mask for uncovering the second structure is thus provided.Type: GrantFiled: August 27, 2002Date of Patent: October 24, 2006Assignee: Infineon Technologies AGInventors: Dirk Efferenn, Ulrike Grüning Von Schwerin, Hans-Peter Moll, Jörg Radecker, Andreas Wich-Glasen
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Publication number: 20060231918Abstract: A transistor is provided which advantageously utilizes a part of the area which, in conventional transistors, is provided for the isolation between the transistors. In this case, the channel width can be enlarged in a self-aligned manner without the risk of short circuits. The field-effect transistor according to the invention has the advantage that it is possible to ensure a significant increase in the effective channel width for the forward current ION compared with previously used, conventional transistor structures, without having to accept a reduction of the integration density that can be attained. Thus, by way of example, the forward current ION can be increased by up to 50%, without having to alter the arrangement of the active regions or of the trench isolation.Type: ApplicationFiled: June 19, 2002Publication date: October 19, 2006Inventors: Martin Popp, Frank Richter, Dietmar Temmler, Andreas Wich-Glasen
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Publication number: 20060231874Abstract: A transistor is provided which advantageously utilizes a part of the area which, in conventional transistors, is provided for the isolation between the transistors. In this case, the channel width can be enlarged in a self-aligned manner without the risk of short circuits. The field-effect transistor according to the invention has the advantage that it is possible to ensure a significant increase in the effective channel width for the forward current ION compared with previously used, conventional transistor structures, without having to accept a reduction of the integration density that can be attained. Thus, by way of example, the forward current ION can be increased by up to 50%, without having to alter the arrangement of the active regions or of the trench isolation.Type: ApplicationFiled: December 6, 2005Publication date: October 19, 2006Applicant: Infineon Technologies AGInventors: Martin Popp, Frank Richter, Dietmar Temmler, Andreas Wich-Glasen
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Patent number: 7119384Abstract: The invention relates to a field effect transistor in which the planar channel region on the upper surface of the elevation is extended in width by means of additional vertical channel regions on the lateral surfaces of the elevation. Said additional vertical channel regions connect directly to the planar channel region (vertical extended channel regions). Said field effect transistor has the advantage that a significant increase in the effective channel width for the current flow ION can be guaranteed relative to conventional transistor structures used up until the present, without having to accept a reduction in the achievable integration density. Said field effect transistor furthermore has a low reverse current IOFF. The above advantages are achieved without the thickness of the gate insulators up to the region of the charge transfer tunnels having to be reduced or a reduced stability.Type: GrantFiled: June 25, 2002Date of Patent: October 10, 2006Assignee: Infineon Technologies AGInventors: Martin Popp, Frank Richter, Dietmar Temmler, Andreas Wich-Glasen
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Patent number: 6989311Abstract: The instant invention is a method for fabricating a trench contact to a deep trench capacitor with a polysilicon filling in a trench hole formed in a silicon substrate. An epitaxy process is performed to selectively grow silicon above the polysilicon filling in the trench hole. An opening leading to the polysilicon filling is anisotropically etched into the epitaxially grown silicon. The opening has lateral dimensions that are smaller than those of the polysilicon filling, and the opening is filled with polysilicon.Type: GrantFiled: May 16, 2002Date of Patent: January 24, 2006Assignee: Infineon Technologies AGInventors: Martin Schrems, Dietmar Temmler, Andreas Wich-Glasen
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Patent number: 6924209Abstract: A method for the fabrication of an integrated semiconductor component, in which at least one isolation trench is formed, a first layer of a nonconductive material is applied by a nonconformal deposition method, and a second layer of a nonconductive material is applied by a conformal deposition method at least to the back surface of the semiconductor component.Type: GrantFiled: October 17, 2001Date of Patent: August 2, 2005Assignee: Infineon Technologies AGInventors: Hans-Peter Moll, Alexander Trueby, Andreas Wich-Glasen
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Publication number: 20050040134Abstract: The invention relates to a trench isolation with a self-aligning surface sealing and a fabrication method for said surface sealing. In this case, the surface sealing may have an overlap region of the substrate surface or a receded region into which extends an electrically conductive layer formed on the substrate surface.Type: ApplicationFiled: July 24, 2002Publication date: February 24, 2005Applicant: Infineon Technologies AGInventors: Dietmar Temmler, Andreas Wich-Glasen
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Publication number: 20050029583Abstract: The invention relates to a field effect transistor in which the planar channel region on the upper surface of the elevation is extended in width by means of additional vertical channel regions on the lateral surfaces of the elevation. Said additional vertical channel regions connect directly to the planar channel region (vertical extended channel regions). Said field effect transistor has the advantage that a significant increase in the effective channel width for the current flow ION can be guaranteed relative to conventional transistor structures used up until the present, without having to accept a reduction in the achievable integration density. Said field effect transistor furthermore has a low reverse current IOFF. The above advantages are achieved without the thickness of the gate insulators up to the region of the charge transfer tunnels having to be reduced or a reduced stability.Type: ApplicationFiled: June 25, 2002Publication date: February 10, 2005Inventors: Martin Popp, Frank Richter, Dietmar Temmler, Andreas Wich-Glasen
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Publication number: 20050026407Abstract: Process for producing a plurality of gate stacks approximately the same height and equidistant on a semiconductor substrate. The process includes providing a gate dielectric on the semiconductor substrate and applying and patterning at least a first layer and a second layer, above the first layer, to the gate dielectric to produce the gate stacks. An oblique implantation of an oxidation-inhibiting implantation species is carried out into two opposite, uncovered side faces of the second of the gate stacks, with respectively adjacent gate stacks serving to shadow the uncovered side faces of the first layer of the gate stacks. Oxidation to simultaneously form a first oxide layer on uncovered side faces of the first layer of the gate stacks and a second oxide layer on uncovered side faces of the second layer of the gate stacks is carried out, the thickness of the first oxide layer being greater than the thickness of the second oxide layer.Type: ApplicationFiled: August 12, 2004Publication date: February 3, 2005Inventors: Martin Popp, Andreas Wich-Glasen
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Publication number: 20040227174Abstract: A memory cell includes a selection transistor and a trench capacitor. The trench capacitor is filled with a conductive trench filling, on which an insulating covering layer is arranged. The insulating covering layer is laterally overgrown, proceeding from the substrate, with a selectively grown epitaxial layer. The selection transistor is formed in the selectively grown epitaxial layer, comprises a source region connected to the trench capacitor, and a drain region connected to a bit line. The junction depth of the source region is now chosen so that the source region reaches as far as the insulating covering layer. Optionally, the thickness of the epitaxial layer can be reduced to a thickness by oxidation and a subsequent etching. Afterwards, a contact trench is etched through the source region down to the conductive trench filling, which trench is filled with a conductive contact and electrically connects the conductive trench filling to the source region.Type: ApplicationFiled: June 17, 2004Publication date: November 18, 2004Inventors: Frank Richter, Dietmar Temmler, Andreas Wich-Glasen
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Patent number: 6770530Abstract: The method for producing a shallow trench isolation for n- and p-channel field-effect transistors in a semiconductor module provides the following steps. A thermal oxide layer is applied in isolation trenches. A nitride liner is subsequently applied. In a further step, a mask is applied in the region in which n-channel field-effect transistors are intended to be produced. The nitride liner is removed around the mask. Finally, the mask is also removed. As a result, the properties of the n-channel field-effect transistors are improved, without impairing the properties of the p-channel field-effect transistors.Type: GrantFiled: March 10, 2003Date of Patent: August 3, 2004Assignee: Infineon Technologies AGInventors: Dirk Efferenn, Hans-Peter Moll, Andreas Wich-Glasen
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Publication number: 20040058509Abstract: A method for the fabrication of an integrated semiconductor component, in which at least one isolation trench is formed, a first layer of a nonconductive material is applied by a nonconformal deposition method, and a second layer of a nonconductive material is applied by a conformal deposition method at least to the back surface of the semiconductor component.Type: ApplicationFiled: October 16, 2003Publication date: March 25, 2004Inventors: Hans-Peter Moll, Alexander Trueby, Andreas Wich-Glasen
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Publication number: 20030181019Abstract: The method for producing a shallow trench isolation for n- and p-channel field-effect transistors in a semiconductor module provides the following steps. A thermal oxide layer is applied in isolation trenches. A nitride liner is subsequently applied. In a further step, a mask is applied in the region in which n-channel field-effect transistors are intended to be produced. The nitride liner is removed around the mask. Finally, the mask is also removed. As a result, the properties of the n-channel field-effect transistors are improved, without impairing the properties of the p-channel field-effect transistors.Type: ApplicationFiled: March 10, 2003Publication date: September 25, 2003Inventors: Dirk Efferenn, Hans-Peter Moll, Andreas Wich-Glasen
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Publication number: 20030040184Abstract: A description is given of a method for a selective masking of a structure with a small structure surface with respect to a structure with a larger structure surface. To that end, the structures are filled with a covering layer. The covering layer is formed with a larger thickness above the first structure, which has the larger structure surface, than above the second structure. Afterward, the covering layer is removed by a homogeneous removal method, so that first the structure surface of the second structure is uncovered. A simple self-aligning method for fabricating a mask for uncovering the second structure is thus provided.Type: ApplicationFiled: August 27, 2002Publication date: February 27, 2003Inventors: Dirk Efferenn, Ulrike Gruning Von Schwerin, Hans-Peter Moll, Jorg Radecker, Andreas Wich-Glasen
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Publication number: 20030003682Abstract: A method for filling an isolation trench in a semiconductor substrate includes the steps of forming a first silicon oxide layer on sidewalls and the floor of each trench by an oxidation step, forming a second silicon oxide layer on the sidewalls and floor of the trench by a first high-density plasma-chemical vapor deposition process without applying an RF voltage to a wafer so that the ratio of depositing to etching is extremely high and then forming a third silicon oxide layer by a second high-density plasma-chemical vapor deposition process having an RF voltage applied to the wafer so that the ratio of depositing to etching is much lower than in the first-mentioned process.Type: ApplicationFiled: June 6, 2002Publication date: January 2, 2003Inventors: Hans-Peter Moll, Alexander Trueby, Andreas Wich-Glasen
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Publication number: 20020173110Abstract: The instant invention is a method for fabricating a trench contact to a deep trench capacitor with a polysilicon filling in a trench hole formed in a silicon substrate. An epitaxy process is performed to selectively grow silicon above the polysilicon filling in the trench hole. An opening leading to the polysilicon filling is anisotropically etched into the epitaxially grown silicon. The opening has lateral dimensions that are smaller than those of the polysilicon filling, and the opening is filled with polysilicon.Type: ApplicationFiled: May 16, 2002Publication date: November 21, 2002Inventors: Martin Schrems, Dietmar Temmler, Andreas Wich-Glasen