Patents by Inventor Ralf Schulze

Ralf Schulze 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).

  • Publication number: 20240145588
    Abstract: A vertical power semiconductor device includes a silicon carbide (SiC) semiconductor body having a first surface and a second surface opposite to each other along a vertical direction. The SiC semiconductor body includes at least one SiC semiconductor layer on a SiC semiconductor substrate. A pn junction is formed in the at least one SiC semiconductor layer. A first load electrode is arranged over the first surface. The vertical power semiconductor device further includes a plurality of first trenches extending into the SiC semiconductor substrate from the second surface. A second load electrode is arranged over the second surface. The second load electrode is electrically connected to the SiC semiconductor substrate via one or more sidewalls of the plurality of first trenches.
    Type: Application
    Filed: October 23, 2023
    Publication date: May 2, 2024
    Inventors: Thomas Ralf SIEMIENIEC, Hans-Joachim Schulze, Werner Schustereder
  • Publication number: 20240105832
    Abstract: A field effect transistor (FET) is proposed. The FET includes a transistor cell area in a silicon carbide (SiC) semiconductor body. An edge termination area surrounds the transistor cell area. A source contact is arranged over a first surface of the SiC semiconductor body. A drain contact is arranged on a second surface of the SiC semiconductor body. The FET further includes a drift region of a first conductivity type between the first surface and the second surface. Along a lateral direction, a net doping concentration in the drift region is larger in the transistor cell area than in the edge termination area.
    Type: Application
    Filed: September 22, 2023
    Publication date: March 28, 2024
    Inventors: Thomas Ralf SIEMIENIEC, Hans-Joachim SCHULZE, Jens Peter KONRATH
  • Patent number: 10603714
    Abstract: Methods and devices for producing a casting mold for sand casting are disclosed. In one embodiment, a method for producing a compacted mold for casting molten material may include positioning a model or pattern in a flask; filling the flask with compactable sand; and compacting the compactable sand around the model or pattern so as to form a compacted mold or compacted mold component suitable for casting. The compacting of the molding sand takes place in zones or regions smaller than a lateral extension of the flask based on a contour or a dimension of the model or pattern.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: March 31, 2020
    Assignee: KUENKEL WAGNER GERMANY GMBH
    Inventors: Gelson G. Montero, Ralf Schulze
  • Publication number: 20180169746
    Abstract: The method according to claim 1, wherein sand is replenished at areas where the pattern or model hat a small height, requiring more sand volume to be compacted there.
    Type: Application
    Filed: August 4, 2015
    Publication date: June 21, 2018
    Inventors: Gelson G. Montero, Ralf Schulze
  • Patent number: 6898847
    Abstract: A method is described for producing an electrical connection between a plug element and a printed circuit board. A plug end of the at least one plug element is inserted in an opening extending through the printed circuit board. A solder, preferably in the form of solder paste, is applied essentially from above to at least parts of the opening or the area surrounding the opening. The connection between the board and the plug end is achieved by melting the solder. Prior to melting of the solder and/or application of the solder, the plug end is introduced into the opening in the printed circuit board essentially from below, and is held therein by a retaining arrangement such that during melting the solder enters the opening from above and contacts the plug end.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: May 31, 2005
    Assignee: Hella KG Hueck & Co.
    Inventors: André Koerner, Ralf Schulze
  • Patent number: 6719571
    Abstract: A housing with an electrical circuit accommodated therein, in particular for use in a motor vehicle, includes a top housing part and a bottom housing part, at least one printed circuit board that is separated at least in part from the bottom housing part and has at least one electrical component, and at least one plug element that extends through the bottom housing part and has a plug end that extends into and/or through the printed circuit board from the side of the latter that faces the bottom housing part and is electrically contacted in the area of the printed circuit board. The at least one plug element has at least one support element that extends from the plug element in the space between the bottom housing part and the printed circuit board in such a way that a section of it rests against the side of the bottom housing part facing the printed circuit board.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: April 13, 2004
    Assignee: Hella KG Hueck & Co.
    Inventors: André Koerner, Ralf Schulze
  • Publication number: 20030024114
    Abstract: A method is described for producing an electrical connection between a plug element and a printed circuit board. A plug end of the at least one plug element is inserted in an opening extending through the printed circuit board. A solder, preferably in the form of solder paste, is applied essentially from above to at least parts of the opening or the area surrounding the opening. The connection between the board and the plug end is achieved by melting the solder. Prior to melting of the solder and/or application of the solder, the plug end is introduced into the opening in the printed circuit board essentially from below, and is held therein by a retaining arrangement such that during melting the solder enters the opening from above and contacts the plug end.
    Type: Application
    Filed: July 15, 2002
    Publication date: February 6, 2003
    Inventors: Andre Koerner, Ralf Schulze
  • Publication number: 20030013329
    Abstract: A housing with an electrical circuit accommodated therein, in particular for use in a motor vehicle, includes a top housing part and a bottom housing part, at least one printed circuit board that is separated at least in part from the bottom housing part and has at least one electrical component, and at least one plug element that extends through the bottom housing part and has a plug end that extends into and/or through the printed circuit board from the side of the latter that faces the bottom housing part and is electrically contacted in the area of the printed circuit board. The at least one plug element has at least one support element that extends from the plug element in the space between the bottom housing part and the printed circuit board in such a way that a section of it rests against the side of the bottom housing part facing the printed circuit board.
    Type: Application
    Filed: July 15, 2002
    Publication date: January 16, 2003
    Inventors: Andre Koerner, Ralf Schulze
  • Patent number: 4822719
    Abstract: A radiation-sensitive mixture which contains(A) a polymer comprised of repeat units represented by the formula ##STR1## where R is a hydrogen or a halogen atom, a cyanide group or an alkyl group of 1-4 carbon atoms,R.sup.1, R.sup.2 are identical or different, and eachand R.sup.3 denotes a hydrogen or a halogen atom, an alkyl group, an alkoxy group, an alkoxycarbonyl group, an acyl group, an aryloxy group, an aroyl group or aralkyl group,R.sup.4 is a hydrogen atom or a divalent organic group which is linked to another unit represented by formula (I),X denotes an oxygen atom or one of the groups NR.sup.8, OCH.sub.2 CHOHCH.sub.2 OCO, OCH.sub.2 CH.sub.2 O and OCH.sub.2 CH.sub.2 OCO, where R.sup.
    Type: Grant
    Filed: August 13, 1986
    Date of Patent: April 18, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Arnold Schneller, Ralf Schulze, Ju Sander, Kurt Erbes