Patents by Inventor Karl-Ernst Ehwald
Karl-Ernst Ehwald 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).
-
Patent number: 9638617Abstract: Micro-electromechanical device for measuring the viscosity of a fluid, comprises a measuring chamber with a micromechanical actuator, arranged as a cantilever above a metallically conductive counter electrode, elastically deformable towards the counter electrode, surrounded by the fluid to be measured and made of a metallically conductive material, a two-terminal RF voltage source that can be switched off, having a first output terminal connected to the actuator, and a second output terminal connected to the counter electrode, and which is designed to output an RF voltage signal that is suitable for deflecting the actuator out of its rest position, and a measuring device to detect a change in the frequency, amplitude or phase of the RF signal in order to determine a measurement value for the viscosity-dependent speed at which the actuator is deformed.Type: GrantFiled: June 19, 2013Date of Patent: May 2, 2017Assignee: IHP GMBH—INNOVATIONS FOR HIGH PERFORMANCE MICROELECTRONICS/LEIBNIZ-INSTITUT FUR INNOVATIVE MIKROELEKTRONIKInventors: Mario Birkholz, Jurgen Drews, Karl-Ernst Ehwald, Dieter Genschow, Ulrich Haak, Philip Kulse, Egbert Matthus, Katrin Schulz, Wolfgang Winkler, Dirk Wolansky, Marlen Frohlich
-
Patent number: 9048052Abstract: The invention relates to a microelectromechanical system with an electromechanical microswitch for switching an electrical signal in particular a radio frequency signal, in particular in a GHz range, comprising a multi-level conductive path layer stack arranged on a substrate, wherein conductive paths of the multi-level conductive path layer stack arranged in different conductive levels are insulated from one another through electrically insulating layers and electrically connected with one another through via contacts, an electromechanical switch which is integrated in a recess of the multi-level conductive path layer stack and which includes a contact pivot, an opposite contact and at least one drive electrode for the contact pivot, wherein the contact pivot, the opposite contact and the at least one drive electrode respectively form a portion of a conductive level of the multi-level layer stack.Type: GrantFiled: December 7, 2010Date of Patent: June 2, 2015Assignee: IHP GmbH—INNOVATIONS FOR HIGH PERFORMANCE MICROELECTRONICS/LIEBNIZ-INSTITUT FUR INNOVATIVE MIKROELEKTRONIKInventors: Mehmet Kaynak, Mario Birkholz, Bernd Tillack, Karl-Ernst Ehwald, René Scholz
-
Publication number: 20140000344Abstract: Micro-electromechanical device for measuring the viscosity of a fluid, comprises a measuring chamber with a micromechanical actuator, arranged as a cantilever above a metallically conductive counter electrode, elastically deformable towards the counter electrode, surrounded by the fluid to be measured and made of a metallically conductive material, a two-terminal RF voltage source that can be switched off, having a first output terminal connected to the actuator, and a second output terminal connected to the counter electrode, and which is designed to output an RF voltage signal that is suitable for deflecting the actuator out of its rest position, and a measuring device to detect a change in the frequency, amplitude or phase of the RF signal in order to determine a measurement value for the viscosity-dependent speed at which the actuator is deformed.Type: ApplicationFiled: June 19, 2013Publication date: January 2, 2014Inventors: Mario Birkholz, Jurgen Drews, Karl-Ernst Ehwald, Dieter Genschow, Ulrich Haak, Philip Kulse, Egbert Matthus, Katrin Schulz, Wolfgang Winkler, Dirk Wolansky, Marlen Frohlich
-
Patent number: 8330237Abstract: An MEMS component including a monolithically integrated electronic component with a multi-plane conductor track layer stack which is arranged on a substrate and into which is integrated a cantilevered elastically movable metallic actuator which is arranged in the multi-plane conductor track layer stack at the level of a conductor track plane and is connected by via contacts to conductor track planes which are arranged thereabove or therebeneath and which apart from an opening in the region of the actuator are separated from the conductor track plane of the actuator by a respective intermediate plane insulator layer, wherein the actuator is formed from a metallically conductive layer or layer combination which is resistant to corrosive liquids or gases and which contains titanium nitride or consists of titanium nitride.Type: GrantFiled: June 27, 2008Date of Patent: December 11, 2012Assignee: IHP GmbH—Innovations for High Performance MicroelectronicsInventors: Jürgen Drews, Karl-Ernst Ehwald, Katrin Schulz
-
Publication number: 20120280393Abstract: The invention relates to a microelectromechanical system with an electromechanical microswitch for switching an electrical signal in particular a radio frequency signal, in particular in a GHz range, comprising a multi-level conductive path layer stack arranged on a substrate, wherein conductive paths of the multi-level conductive path layer stack arranged in different conductive levels are insulated from one another through electrically insulating layers and electrically connected with one another through via contacts, an electromechanical switch which is integrated in a recess of the multi-level conductive path layer stack and which includes a contact pivot, an opposite contact and at least one drive electrode for the contact pivot, wherein the contact pivot, the opposite contact and the at least one drive electrode respectively form a portion of a conductive level of the multi-level layer stack.Type: ApplicationFiled: December 7, 2010Publication date: November 8, 2012Applicant: IHP GMBHInventors: Mehmet Kaynak, Mario Birkholz, Bernd Tillack, Karl-Ernst Ehwald, René Scholz
-
Patent number: 8035167Abstract: A complementary bipolar semiconductor device (CBi semiconductor device) comprising a substrate of a first conductivity type, active bipolar transistor regions in the substrate, in which the base, emitter and collector of vertical bipolar transistors are arranged, vertical epitaxial-base npn bipolar transistors in a first subset of the active bipolar transistor regions, vertical epitaxial-base pnp bipolar transistors in a second subset of the active bipolar transistor regions, collector contact regions which are respectively arranged adjoining an active bipolar transistor region, and shallow field insulation regions which respectively laterally delimit the active bipolar transistor regions and the collector contact regions, wherein arranged between the first or the second or both the first and also the second subset of active bipolar transistor regions on the one hand and the adjoining collector contact regions on the other hand is a respective shallow field insulation region of a first type with a first depthType: GrantFiled: December 7, 2007Date of Patent: October 11, 2011Assignee: IHP-GmbH—Innovations for High Performance Microelectronics/Leibniz-Institut fur Innovativ MikroelektronikInventors: Dieter Knoll, Bernd Heinemann, Karl-Ernst Ehwald
-
Publication number: 20100207216Abstract: An MEMS component including a monolithically integrated electronic component with a multi-plane conductor track layer stack which is arranged on a substrate and into which is integrated a cantilevered elastically movable metallic actuator which is arranged in the multi-plane conductor track layer stack at the level of a conductor track plane and is connected by via contacts to conductor track planes which are arranged thereabove or therebeneath and which apart from an opening in the region of the actuator are separated from the conductor track plane of the actuator by a respective intermediate plane insulator layer, wherein the actuator is formed from a metallically conductive layer or layer combination which is resistant to corrosive liquids or gases and which contains titanium nitride or consists of titanium nitride.Type: ApplicationFiled: June 27, 2008Publication date: August 19, 2010Applicant: IHP GmbH - Innovations for High Performance Micro -electronics/Leibriz-Institut fur innovative MikroInventors: Jürgen Drews, Karl-Ernst Ehwald, Katrin Schulz
-
Publication number: 20100019326Abstract: A complementary bipolar semiconductor device (CBi semiconductor device) comprising a substrate of a first conductivity type, active bipolar transistor regions in the substrate, in which the base, emitter and collector of vertical bipolar transistors are arranged, vertical epitaxial-base npn bipolar transistors in a first subset of the active bipolar transistor regions, vertical epitaxial-base pnp bipolar transistors in a second subset of the active bipolar transistor regions, collector contact regions which are respectively arranged adjoining an active bipolar transistor region, and shallow field insulation regions which respectively laterally delimit the active bipolar transistor regions and the collector contact regions, wherein arranged between the first or the second or both the first and also the second subset of active bipolar transistor regions on the one hand and the adjoining collector contact regions on the other hand is a respective shallow field insulation region of a first type with a first depthType: ApplicationFiled: December 7, 2007Publication date: January 28, 2010Inventors: Dieter Knoll, Bernd Heinemann, Karl-Ernst Ehwald
-
Patent number: 7595534Abstract: The invention relates to layers in substrate wafers. The aim of the invention is to provide layers in substrate wafers with which the drawbacks of conventional assemblies are overcome in order to achieve, on the one hand, an adequate resistance to latch-up in highly scaled, digital CMOS circuits with comparatively low costs and, on the other hand, to ensure low substrate losses/couplings for analog high-frequency circuits and, in addition, to influence the component behavior in a non-destructive manner.Type: GrantFiled: December 6, 2001Date of Patent: September 29, 2009Assignee: IHP GmbH-Innovations for High Performance Microelectronics/Institut fur Innovative MikroelektronikInventors: Bernd Heinemann, Karl-Ernst Ehwald, Dieter Knoll, Bernd Tillack, Dirk Wolansky, Peter Schley
-
Patent number: 7323390Abstract: The semiconductor device according to the invention includes a substrate, a field insulating region which delimits an active region of the semiconductor substrate, a collector, at least one collector contact region associated with the collector, and a base with an associated base connection region. The collector and the collector contact region are formed in the same active region. In addition the base connection region extends partially over the active region and is separated from the surface of the active region by an insulator layer.Type: GrantFiled: December 2, 2002Date of Patent: January 29, 2008Assignee: IHP GmbH - Innovations for High Performance Microelectronics/Institut fur innovative MikroelektronikInventors: Bernd Heinemann, Dieter Knoll, Karl-Ernst Ehwald, Holger Rücker
-
Patent number: 7307336Abstract: The invention concerns a bipolar transistor with an epitaxially grown base and a self-positioned emitter, whereby the base is formed from a first substantially monocrystalline epitaxial region (1) which is arranged in parallel relationship to the surface of the semiconductor substrate (2) and a second substantially polycrystalline and highly doped region (3) of the same conductivity type which is arranged in perpendicular relationship to the substrate surface and encloses the first region at all sides and that said second region, at least at one side but preferably at all four sides, is conductingly connected to a third, preferably highly doped or metallically conducting, high temperature-resistant polycrystalline layer (4) which is arranged in parallel relationship to the surface of the semiconductor substrate and forms or includes the outer base contact to a metallic conductor track system.Type: GrantFiled: December 6, 2002Date of Patent: December 11, 2007Assignee: IHP GmbH - Innovations for High Performance Microelectronic / Institut fur innovative MikroelektronikInventors: Karl-Ernst Ehwald, Alexander Fox, Dieter Knoll, Bernd Heinemann, Steffen Marschmayer, Katrin Blum
-
Patent number: 7304348Abstract: A lateral CMOS-compatible RF-DMOS transistor (RFLDMOST) with low ‘on’ resistance, characterised in that disposed in the region of the drift space (20) which is between the highly doped drain region (5) and the control gate (9) and above the low doped drain region LDDR (22, 26) of the transistor is a doping zone (24) which is shallow in comparison with the penetration depth of the source/drain region (3, 5), of inverted conductivity type to the LDDR (22, 26) (hereinafter referred to as the inversion zone) which has a surface area-related nett doping which is lower than the nett doping of the LDDR (22, 26) and does not exceed a nett doping of 8E12 At/cm2.Type: GrantFiled: August 16, 2002Date of Patent: December 4, 2007Assignee: IHP GmbH - Innovations for High Performance Microelectronics/Institut fur Innovative MikroelektronikInventors: Karl-Ernst Ehwald, Holger Rücker, Bernd Heinemann
-
Patent number: 7284413Abstract: An apparatus for measuring the viscosity of a fluid having a first rigid member extending from a body of semiconductor material and provided with a first conductive path and a second resiliently flexible member provided with a second conductive path and arranged in cantilever fashion over the rigid member. At least one of the conductive paths may be selectively energized to brig about relative movement between the rigid and flexible member. Subsequent deenergization of the path causes the resiliently flexible member to return to its initial position, the rate of return being measured to derive a signal representative of the viscosity. Also described are methods of carrying out the measurement and of fabricating the apparatus.Type: GrantFiled: May 28, 2001Date of Patent: October 23, 2007Inventors: Rudolf Ehwald, Karl-Ernst Ehwald, Dieter Knoll, Wolfgang Winkler, Henning Zinke
-
Patent number: 6878995Abstract: A CMOS-compatible DMOS transistor can be designed by virtue of a suitable layout configuration optionally for very high drain voltages or for power amplification at very high frequencies and which can be produced at a low level of additional cost in comparison with a conventional sub-?m production technology for CMOS circuits. A gate insulator of the transistor is of a unitary thickness under a control gate in the entire (active) region through which current flows. A zone of increased doping concentration (well region) which is near the surface and which determines the transistor threshold voltage is so arranged under the control gate that it occupies the entire area under the control gate which is on the active region and ends within a so-called drift space between the control gate and a highly doped drain region. The entire surface of the drift space is covered by a zone of the conductivity type of the drain region (VLDD), which is lowly doped in comparison with the highly doped drain region.Type: GrantFiled: March 24, 2001Date of Patent: April 12, 2005Assignee: IHP GmbH - Innovations for High Performance MicroelectronicsInventors: Karl-Ernst Ehwald, Bernd Heinemann, Dieter Knoll, Wolfgang Winkler
-
Publication number: 20050023642Abstract: The semiconductor device according to the invention includes a substrate, a field insulating region which delimits an active region of the semiconductor substrate, a collector, at least one collector contact region associated with the collector, and a base with an associated base connection region. The collector and the collector contact region are formed in the same active region. In addition the base connection region extends partially over the active region and is separated from the surface of the active region by an insulator layer.Type: ApplicationFiled: December 2, 2002Publication date: February 3, 2005Inventors: Bernd Heinemann, Dieter Knoll, Karl-Ernst Ehwald, Holger Rucker
-
Publication number: 20050006724Abstract: The invention concerns a bipolar transistor with an epitaxially grown base and a self-positioned emitter, whereby the base is formed from a first substantially monocrystalline epitaxial region (1) which is arranged in parallel relationship to the surface of the semiconductor substrate (2) and a second substantially polycrystalline and highly doped region (3) of the same conductivity type which is arranged in perpendicular relationship to the substrate surface and encloses the first region at all sides and that said second region, at least at one side but preferably at all four sides, is conductingly connected to a third, preferably highly doped or metallically conducting, high temperature-resistant polycrystalline layer (4) which is arranged in parallel relationship to the surface of the semiconductor substrate and forms or includes the outer base contact to a metallic conductor track system.Type: ApplicationFiled: December 6, 2002Publication date: January 13, 2005Inventors: Karl-Ernst Ehwald, Alexander Fox, Dieter Knoll, Bernd Heinemann, Steffen Marschmayer, Katrin Blum
-
Publication number: 20040262680Abstract: A lateral CMOS-compatible RF-DMOS transistor (RFLDMOST) with low ‘on’ resistance, characterised in that disposed in the region of the drift space (20) which is between the highly doped drain region (5) and the control gate (9) and above the low doped drain region LDDR (22, 26) of the transistor is a doping zone (24) which is shallow in comparison with the penetration depth of the source/drain region (3, 5), of inverted conductivity type to the LDDR (22, 26) (hereinafter referred to as the inversion zone) which has a surface area-related nett doping which is lower than the nett doping of the LDDR (22, 26) and does not exceed a nett doping of 8E12 At/cm2.Type: ApplicationFiled: August 16, 2004Publication date: December 30, 2004Inventors: Karl-Ernst Ehwald, Holger Rucker, Bernd Heinemann
-
Patent number: 6740560Abstract: The aim of the invention is to provide for a bipolar transistor and a method for producing the same. Said bipolar transistor should have minimal base-emitter capacities and very good high frequency characteristics. The static characteristics, especially the base current ideality and the low frequency noise, of a bipolar transistor with weakly doped cap layer (116) should not significantly deteriorate and process complexity should not increase. According to the invention, the problem is solved by inserting a special doping profile in a cap layer (116) (cap doping) which has been produced epitaxially. A minimal base emitter capacity and very good high frequency characteristics can be obtained by means of said doping profile. At the same time, the efficiency of the generation/recombination active boundary surface between the cap layer (116) and the isolator (117) in the polysilicon overlapping area in the relevant working area of the transistor is reduced and the base current ideality is improved.Type: GrantFiled: September 17, 2001Date of Patent: May 25, 2004Assignee: Institut fuer Halbleiterphysik Frankfurt (Oder) GmbHInventors: Bernd Heinemann, Karl-Ernst Ehwald, Dieter Knoll
-
Publication number: 20040075118Abstract: The invention relates to layers in substrate wafers. The aim of the invention is to provide layers in substrate wafers with which the drawbacks of conventional assemblies are overcome in order to achieve, on the one hand, an adequate resistance to latch-up in highly scaled, digital CMOS circuits with comparatively low costs and, on the other hand, to ensure low substrate losses/couplings for analog high-frequency circuits and, in addition, to influence the component behavior in a non-destructive manner.Type: ApplicationFiled: November 17, 2003Publication date: April 22, 2004Inventors: Bernd Heinemann, Karl-Ernst Ehwald, Dieter Knoll, Bernd Tillack, Dirk Wolansky, Peter Schley
-
Patent number: 6627972Abstract: The invention relates to a vertical bipolar transistor and a method for the production thereof. The aim of the invention is to produce a vertical bipolar transistor and to disclose a method for the production thereof, whereby excellent high frequency properties can be obtained for said transistor using the simplest possible production technology involving an implanted epitaxy-free collector and only one polysilicon layer spread over a large surface and which can be easily integrated into a conventional mainstream CMOS process without epitaxially produced trough areas.Type: GrantFiled: March 7, 2001Date of Patent: September 30, 2003Assignee: Institut fuer Halbleiterphysik Frankfurt (Oder) GmbHInventors: Karl-Ernst Ehwald, Dieter Knoll, Bernd Heinemann