Patents by Inventor Stephan Schroder

Stephan Schroder 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: 20070247944
    Abstract: An integrated semiconductor memory with refreshing of memory cells includes a temperature sensor to detect a chip temperature of the integrated semiconductor memory, a connection to apply a command signal, a frequency generation unit to generate a frequency signal, and a memory cell to store a data item, the stored data item being refreshed at the frequency of the frequency signal. The frequency generation unit generates the frequency signal at a first frequency on the basis of a chip temperature detected by the temperature sensor when a first state of the command signal is applied and the frequency generation unit generates the frequency signal at a second frequency, which is changed in comparison with the first frequency, at the same chip temperature when a second state of the command signal is applied.
    Type: Application
    Filed: April 24, 2007
    Publication date: October 25, 2007
    Applicant: QIMONDA AG
    Inventors: Frank Fischer, Manfred Proll, Thilo Schaffroth, Stephan Schroder
  • Publication number: 20060193168
    Abstract: An integrated semiconductor memory device includes memory cells each with a selection transistor and a storage capacitor. Memory cells of this type are usually read by the potential of the bit line to which the memory cell is connected being compared in a sense amplifier with the potential of a complementary, second bit line and a voltage difference identified being amplified. The semiconductor memory according to the invention provides for that capacitor electrode which is not connected to the selection transistor to be connected to the complementary, second bit line. As a result, for an operating voltage with the same magnitude, larger quantities of charge can be stored in the storage capacitor since now the two mutually spread potentials output by the sense amplifier are used for biasing the storage capacitor.
    Type: Application
    Filed: January 13, 2006
    Publication date: August 31, 2006
    Inventors: Stephan Schroder, Herbert Benzinger, Georg Eggers, Manfred Proll, Jorg Kliewer
  • Publication number: 20060120176
    Abstract: An integrated semiconductor memory includes word lines connected to a first voltage potential via a respective first controllable switch and a respective third controllable switch and to a second voltage potential via a respective second controllable switch. In order to test whether one of the word lines is connected to the first voltage potential via its respective first and third controllable switches, the one of the word lines is connected to a comparator circuit via the respective second controllable switch and a driver line. After the respective first and third controllable switches have been controlled into the on state, in a test operating state of the integrated semiconductor memory, the respective second controllable switch is controlled into the on state and a potential state on the word line is evaluated by the comparator circuit. The result of the evaluation is fed to an external data terminal by an evaluation signal.
    Type: Application
    Filed: September 27, 2005
    Publication date: June 8, 2006
    Inventors: Ralf Schneider, Stephan Schroder, Manfred Proll, Herbert Benzinger
  • Publication number: 20050248996
    Abstract: An integrated circuit includes an input terminal (IN) for application of a supply voltage (Vext) and an output terminal (A) for generation of an output voltage (Vout). A first branch including a first controllable resistance (T1) and a second branch including a charge pump (10) and a second controllable resistance (T2) are connected between the input terminal (IN) and the output terminal (A). A control circuit (20) alters the resistance values of the first and second controllable resistances (T1, T2) in a manner dependent on a ratio of an actual value (Vout) of the output voltage to a desired value (VSout) of the output voltage and a ratio of an actual value (Vext) of the supply voltage to a desired value (VSext) of the supply voltage. As a result, the output voltage (Vout) can be stabilized to the desired value (VSout) virtually independently of fluctuations of the supply voltage.
    Type: Application
    Filed: May 6, 2005
    Publication date: November 10, 2005
    Inventors: Ralf Schneider, Stephan Schroder, Manfred Proll, Jorg Kliewer
  • Publication number: 20050226309
    Abstract: In an arrangement for determining a temperature loading during a soldering process, a semiconductor chip (1) comprises at least one contact (2) to be soldered or is electrically conductively connected to at least one contact (14d) to be soldered that is situated outside the semiconductor chip. The semiconductor chip (1) furthermore comprises a temperature sensor device (3), which determines a measurement quantity corresponding to the temperature. A processing device (4, 5) has an analog-to-digital converter (5), which is electrically conductively connected to the temperature sensor device (3) and converts the measurement quantity into at least one storable signal that represents the temperature loading. A voltage supply device (10), which is electrically conductively connected to the temperature sensor device (3) and the processing device (4, 5), supplies these components with an operating voltage. A data memory (6) serves for storing the at least one storable signal.
    Type: Application
    Filed: December 10, 2004
    Publication date: October 13, 2005
    Inventors: Manfred Proll, Jurgen Auge, Stephan Schroder, Thomas Huber
  • Publication number: 20050205946
    Abstract: A field effect semiconductor comprises a semiconductor layer having a surface, a first and a second semiconductor region in the semiconductor layer, which are arranged next to one another at the surface of the semiconductor layer, an insulating layer between the first semiconductor region and the second semiconductor region, a semiconductor strip on the surface of the semiconductor layer, which semiconductor strip overlaps the first semiconductor region and the second semiconductor region and adjoins these. A gate overlaps the semiconductor strip at least in the region of the insulating layer. A gate dielectric insulates the gate from the semiconductor strip the first semiconductor region and the second semiconductor region. The semiconductor strip and the gate being formed such that the semiconductor strip is electrically insulating at a first predetermined gate voltage and is electrically conductive at a second predetermined gate voltagero.
    Type: Application
    Filed: March 15, 2005
    Publication date: September 22, 2005
    Applicant: Infineon Technologies AG
    Inventors: Jorg Vollrath, Marcin Gnat, Ralf Schneider, Stephan Schroder
  • Publication number: 20050195638
    Abstract: An integrated semiconductor memory device includes a memory cell array (B1) with a first bit line and a second bit line (BL, /BL), a controllable resistor (SW) and a control unit (100) configured to control the controllable resistor. In a first operating state of the integrated semiconductor memory device, the first and second bit lines are connected to one another via a first controllable switch (ET1) and also via the controllable resistor (SW) which has been set to a low resistance, to a connection (A10) that applies a mid-voltage (VBLEQ), where the voltage level of the mid-voltage is in the form of an arithmetic mean between a first and second voltage potential (VBLH, VBLL). By virtue of the control unit briefly setting the controllable resistor to a very low resistance in the first operating state of the integrated semiconductor memory device, the period of time required for the first and second bit lines require to assume the mid-voltage (VBLEQ) is shortened.
    Type: Application
    Filed: March 4, 2005
    Publication date: September 8, 2005
    Inventors: Herbert Benzinger, Jorg Kliewer, Manfred Proll, Stephan Schroder
  • Publication number: 20050194614
    Abstract: Semiconductor memories (1) have segmented word lines (5a, 5b), which in each case have a main word line (10a, 10b) made of a conductive metal and a plurality of interconnect segments (15a, 15b) coupled to the main word line (10a, 10b), which are coupled to the respective main word line (10a, 10b) in each case via at least one contact hole filling (11). If one of the contact hole fillings (11) is defective or at high resistance then functional errors of the semiconductor memory occur. The interconnect segments (15a, 15b) of two respective word lines (5a, 5b) can be short-circuited in pairs with the aid of switching units (20), whereby a static current (I) that flows via the contact hole fillings (11) can be used for electrically stressing the contact hole fillings (11). Electrical stressing of contact hole fillings of segmented word lines is thus made possible.
    Type: Application
    Filed: February 18, 2005
    Publication date: September 8, 2005
    Inventors: Georg Eggers, Stephan Schroder, Manfred Proll, Herbert Benzinger
  • Publication number: 20050174863
    Abstract: An integrated semiconductor memory including memory cells which can be driven via first and second word lines and can be replaced by redundant memory cells. In the first memory cell type, data can be stored corresponding to the data present at a data input terminal. In the memory cells of a second memory cell type, data can be stored inverted with respect to data present at the data input terminal. The integrated semiconductor memory includes a circuit for data inversion, wherein the data are written to a redundant memory cell, inverted with respect to the data present at the data input terminal if the defective memory cell and the redundant memory cell replacing it are situated in different word line strips of a bit line twist, and if the defective memory cell and the redundant memory cell replacing it are associated with different memory cell types.
    Type: Application
    Filed: February 9, 2005
    Publication date: August 11, 2005
    Inventors: Manfred Proll, Johann Pfeiffer, Stephan Schroder, Arndt Gruber, Georg Eggers
  • Publication number: 20050135163
    Abstract: An integrated circuit includes a programming circuit (10) for generating programming signals (PS1, . . . , PS4) with a first input terminal (E1) for applying a control voltage (ES), a second input terminal (E2) for applying a reference voltage (Vref), a storage circuit (30) with programmable switches (35, . . . , 38) and output terminals (A1, . . . , A4). The programming circuit in each case generates a programming signal (PS1, . . . , PS4) when the control voltage (ES) exceeds a predefined threshold voltage formed from the reference voltage. The number of programming signals (PS1, . . . , PS4) is dependent on the magnitude of the threshold voltage exceeded by the control voltage (ES). The programming signals are used for programming the programmable switches (35, . . . , 38). The programming state of the programmable switches can be read out via the output terminals (A1, . . . , A4) of the integrated circuit.
    Type: Application
    Filed: December 10, 2004
    Publication date: June 23, 2005
    Inventors: Ralf Schneider, Jurgen Auge, Stephan Schroder, Manfred Proll
  • Publication number: 20050018507
    Abstract: A circuit for controlling an access to an integrated memory includes a command decoder for receiving at least one external command for an access to the memory. An access controller is connected to the command decoder for receiving internal command signals, which are output by the command decoder. In the course of a memory access, the command decoder outputs a precharge command signal for precharging a row of the memory cell array of the integrated memory. A control circuit, which can determine a temperature of the memory, is designed to temporally variably influence the transmission of the precharge command signal of the command decoder to the access controller in a manner dependent on the temperature of the memory. The write recovery time tWR can be retained even for higher operating frequencies of the memory.
    Type: Application
    Filed: July 16, 2004
    Publication date: January 27, 2005
    Inventors: Stephan Schroder, Aurel Campenhausen, Manfred Proll, Koen Zanden
  • Publication number: 20050018401
    Abstract: A device for cooling memory modules can include a plurality of elements. The elements can thermal couple at least two memory modules. The device can further include a body or a plurality of contact areas bearing in a planar manner.
    Type: Application
    Filed: April 22, 2004
    Publication date: January 27, 2005
    Inventors: Christian Stocken, Stephan Schroder, Thomas Huber, Manfred Proll
  • Publication number: 20040263216
    Abstract: Integrated circuit having a voltage monitoring circuit and a method for monitoring an internal burn-in voltage. One embodiment provides an integrated circuit having a voltage monitoring circuit for monitoring an internal burn-in voltage provided during the burn-in operation of the integrated circuit, wherein a reference voltage is provided, which defines a lower limit for the burn-in voltage, wherein a comparison voltage dependent on the internal burn-in voltage and the reference voltage are applied to a comparator device to carry out a threshold value comparison of the internal burn-in voltage with the reference voltage. A burn-in signal may be output at an output of the comparator device so that the burn-in signal can be used to ascertain whether the burn-in voltage lies below or above a voltage threshold defined by the reference voltage.
    Type: Application
    Filed: April 29, 2004
    Publication date: December 30, 2004
    Inventors: Manfred Proll, Stephan Schroder, Johann Pfeiffer, Jurgen Auge
  • Publication number: 20040240262
    Abstract: An integrated circuit, in particular, an integrated memory, contains a control circuit for ascertaining an operating state of the circuit. A self-repair circuit, which is connected to the control circuit, is used to implement self-test and self-repair operation for checking the functioning of, and repairing, defective circuit sections of the integrated circuit. After a supply voltage has been applied to the integrated circuit, the control circuit ascertains an operating state of the integrated circuit and, in a manner dependent thereon, the self-repair circuit is activated by the control circuit in a self-controlling manner in order to put the integrated circuit into a self-repair mode for implementing self-test and self-repair operation. The integrated circuit can be tested for its functionality and repaired even after being soldered onto a module substrate.
    Type: Application
    Filed: May 25, 2004
    Publication date: December 2, 2004
    Inventors: Evangelos Stavrou, Stephan Schroder, Manfred Proll, Koen Van der Zanden
  • Publication number: 20040233737
    Abstract: A circuit arrangement for setting a voltage supply for a read/write amplifier of an integrated memory has a first voltage generator circuit for generating a supply voltage for application to the read/write amplifier during an assessment and amplification operation and a second voltage generator circuit for generating a precharge voltage for precharging bit lines of the memory which are connected to the read/write amplifier. A temperature detector circuit, which is connected to the first voltage generator circuit, is used to detect a temperature of the memory and interacts with the first voltage generator circuit to set the supply voltage applied to the read/write amplifier in a manner depending on a temperature of the memory.
    Type: Application
    Filed: May 10, 2004
    Publication date: November 25, 2004
    Inventors: Herbert Benzinger, Koen Van der Zanden, Stephan Schroder, Manfred Proll
  • Publication number: 20040201051
    Abstract: An integrated semiconductor circuit can have memory cells, which can be read by word lines and bit lines. Two mutually adjacent bit lines in each case are connected to inputs of the same signal amplifier. In order to compensate for parasitic capacitors, which arise at thin sidewall insulations between the patterned word lines and adjacent bit line contacts, additional contact structures which lead past the word lines and represent dummy contacts can be provided. The additional parasitic capacitances produced by the dummy contact alter the electrical potential of the respective reference bit line at the signal amplifier like the parasitic capacitances of activated bit lines, as a result of which the measured differential potential can be corrected with respect to the parasitic effects.
    Type: Application
    Filed: February 25, 2004
    Publication date: October 14, 2004
    Inventors: Stephan Schroder, Joerg Vollrath, Tobias Hartner
  • Publication number: 20040205308
    Abstract: An integrated memory has individually addressable normal and redundant units of memory cells. A memory unit is used to store, in a normal mode, an address for one of the normal units which needs to be replaced by one of the redundant units. A comparison unit compares an address which is present on an address bus with an address stored in the memory unit and activates one of the redundant units in the event of a match being identified. The memory also has a test circuit which can be activated by a test mode signal, can reset the memory unit to an initial state, and can store an address for one of the redundant units in the memory unit for subsequently writing an identification code to this redundant unit.
    Type: Application
    Filed: March 12, 2004
    Publication date: October 14, 2004
    Inventors: Aurel von Campenhausen, Manfred Proll, Jorg Kliewer, Stephan Schroder
  • Publication number: 20040196711
    Abstract: An integrated semiconductor circuit includes a cell array havinb memory cells which can be read by word lines and bit lines. Two bit lines in each case are connected to inputs of the same signal amplifier. In order to compensate for parasitic capacitances which arise at thin sidewall insulations between the patterned word lines and adjacent bit line contacts which connect the bit lines located at a higher level to the active regions located at a deeper level, two additional word lines and dummy contacts of the bit lines are dummy contacts lead past this additional word lines. The additional parasitic capacitances produced by the dummy contacts alter the electrical potential of the respective reference bit line at the signal amplifier in the same way as the parasitic capacitances of activated bit lines, as a result of which the measured differential potential is corrected with respect to the parasitic effects.
    Type: Application
    Filed: February 27, 2004
    Publication date: October 7, 2004
    Inventors: Joerg Vollrath, Stephan Schroder, Tobias Hartner
  • Publication number: 20040156253
    Abstract: An integrated memory has a memory cell array having word lines and bit lines. The bit lines are organized in bit line pairs. The bit lines of the bit line pairs cross one another at a crossing location and run parallel to one another. A sense amplifier is connected to one of the bit line pairs at one end. Two precharge circuits are provided. One precharge circuit is arranged on a side of the crossing location and the other precharge circuit is arranged on a side of the crossing location. The precharge circuit facing the sense amplifier is arranged at a first distance from the crossing location and at a second distance from the sense amplifier. The RC constant of the bit lines, which is effective during the precharge operation, is reduced, so that the time period required for a precharge operation is reduced.
    Type: Application
    Filed: January 20, 2004
    Publication date: August 12, 2004
    Inventors: Manfred Proll, Stephan Schroder, Heinz-Joachim Neubauer, Evangelos Stavrou
  • Publication number: 20040130310
    Abstract: A voltage generator arrangement supplies a largely constant output voltage with a high current driver capability. A bandgap reference circuit drives a voltage generator on the output side, if necessary via an impedance converter. The bandgap reference circuit and the impedance converter on the one hand, and the voltage generator on the other hand, are connected to different reference ground potential lines. The voltage generator on the output side is preceded by a correction circuit, which corrects for the voltage drop on that reference ground potential line to which the output-side voltage generator is connected. The voltage generator arrangement is suitable for a greater integration density.
    Type: Application
    Filed: December 17, 2003
    Publication date: July 8, 2004
    Inventors: Manfred Proll, Stephan Schroder, Joerg Vollrath, Ralf Schneider