摘要:
An integrated semiconductor memory, which can be operated in a normal operating state and a test operating state, includes a current pulse circuit with an input terminal for applying an input signal. The current pulse circuit is connected to an output terminal via an interconnect for carrying a current. In the test operating state, the current pulse circuit generates at least one first current pulse with a first, predetermined time duration in a first test cycle and at least one second current pulse with a second, unknown time duration in a subsequent second test cycle. In addition to a first current flowing on the interconnect in the normal operating state, a second current flows on the interconnect during the first test cycle and a third current flows during the second test cycle in the test operating state.
摘要:
Integrated semiconductor circuits, in particular, dynamic random access memories include a multiplicity of generator circuits for generating internal voltage levels from an externally applied supply voltage. During testing, the internal voltage levels are altered by the output voltage generated at the output of the generator circuit being adapted to an externally applied test voltage. If the test voltage is outside a tolerance range, the semiconductor circuit maybe destroyed. A protection circuit connected in parallel with the generator circuit limits the output voltage.
摘要:
A differential amplifier circuit has two input transistors, a load element, and a current source. A terminal for an input voltage is connected to a control terminal of a first input transistor. A terminal for a reference voltage is connected to a control terminal of a second input transistor. The two input transistors are connected in parallel between the load element and a terminal of the current source. A terminal for an internal reference potential is connected to a further terminal of the current source. A regulating circuit, is connected to the terminal for the voltage and to the terminal for the reference potential, and regulates the potential of the circuit dependent on changes in the reference voltage. Fluctuations of the reference voltage are compensated by regulation of the internal reference potential. As a result, the operating point of the circuit is stabilized independently of fluctuations of the reference voltage.
摘要:
A method for providing a compressed bit fail map, in accordance with the invention includes the steps of testing a semiconductor device to determine failed devices and transferring failure information to display a compressed bit map by designating areas of the bit map for corresponding failure locations on the semiconductor device. Failure classification is provided by designating shapes and dimensions of fail areas in the designated areas of the bit map such that the fail area shapes and dimensions indicate a fail type.
摘要:
Disclosed is a method and apparatus for testing a semiconductor memory having a plurality of memory cells arranged in rows and columns and a plurality of sense amplifiers, each for amplifying memory cell signals of a common row or column. In an illustrative embodiment of the method, a voltage level or test pattern is written into at least one target cell of the memory cells. A word line coupled to the target cell is then activated and subsequently deactivated, to thereby modify the voltage level stored in the cell, while the associated sense amplifier is prevented from refreshing the cell as the word line is activated, e.g., by disabling the sense amplifier. A test bit line voltage is then applied to a bit line coupled to the cell to charge the same. Data is then read from the target cell with settings of the associated sense amplifier enabled, and compared to the original voltage level written into the cell. The process is repeated for different test bit line voltages. The method can be used to determine the signals at the sense amplifiers during normal operation of the memory, without employing complex and costly picoprobes.
摘要:
An integrated semiconductor memory has memory cells, with at least one pair of bit lines which comprises a first bit line and a second bit line, and with at least one sense amplifier which has the first bit line and the second bit line connected to it. The bit lines respectively have a first conductor track structure and a second conductor track structure, where the memory cells are respectively connected to the second conductor track structure, and where the first conductor track structure is respectively interposed between the sense amplifier and the second conductor track structure of the respective bit line and is arranged at a greater distance from the substrate area than the respective second conductor track structure.
摘要:
An integrated circuit includes a memory cell array including a plurality of memory cells. A first plurality of bit lines is positioned in a first plane. The first plurality of bit lines is electrically coupled to a first set of the memory cells. A second plurality of bit lines is positioned in a second plane that is different than the first plane. The second plurality of bit lines is electrically coupled to a second set of the memory cells.
摘要:
An integrated semiconductor circuit includes a transistor and a strip conductor (11). The transistor includes a first (1) and a second source/drain region (2) and a gate electrode. The strip conductor (11) is electrically insulated from a semiconductor body at least by a gate dielectric and forms the gate electrode in the area of the transistor. The strip conductor (11) extends along a first direction (x) in the area of the transistor. The second source/drain region (2) is arranged offset with respect to the first source/drain region (1) in the first direction (x). The transistor thus formed has an inversion channel (K1) that only extends between two corner areas (1a, 2a) facing one another of the first and of the second source/drain region, i.e. is much narrower than in the case of a conventional transistor.
摘要:
Integrated semiconductor circuits, in particular, dynamic random access memories include a multiplicity of generator circuits for generating internal voltage levels from an externally applied supply voltage. During testing, the internal voltage levels are altered by the output voltage generated at the output of the generator circuit being adapted to an externally applied test voltage. If the test voltage is outside a tolerance range, the semiconductor circuit maybe destroyed. A protection circuit connected in parallel with the generator circuit limits the output voltage.
摘要:
An integrated semiconductor memory includes memory cells that store a first data record has at least one datum with a first or second data value and a second data record has at least one datum with the first or second data value. The integrated semiconductor memory has a combination circuit that generates the third data record on the output side from the data records fed to the combination circuit on the input side to ascertain based on the third data record whether the first and second data records have been fed to the combination circuit on the input side. The combination circuit generates the datum of the third data record with the first data value, if the first and second data records were fed to the combination circuit on the input side.