WO2002033708A1 - Procede de traitement -par analyse- de la reparation de defauts de memoire et appareil d'essai de memoire mettant en oeuvre ce procede - Google Patents
Procede de traitement -par analyse- de la reparation de defauts de memoire et appareil d'essai de memoire mettant en oeuvre ce procede Download PDFInfo
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- WO2002033708A1 WO2002033708A1 PCT/JP2001/009217 JP0109217W WO0233708A1 WO 2002033708 A1 WO2002033708 A1 WO 2002033708A1 JP 0109217 W JP0109217 W JP 0109217W WO 0233708 A1 WO0233708 A1 WO 0233708A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/56—External testing equipment for static stores, e.g. automatic test equipment [ATE]; Interfaces therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/56—External testing equipment for static stores, e.g. automatic test equipment [ATE]; Interfaces therefor
- G11C2029/5606—Error catch memory
Definitions
- the present invention implements a memory failure analysis processing method for analyzing whether or not a defective memory cell existing in a memory having a redundancy configuration tested by a memory test apparatus can be repaired, and a method for analyzing the memory failure. And a memory test apparatus.
- memory test equipment for testing various types of semiconductor memory including memories composed of semiconductor integrated circuits (IC) (IC memories)
- IC memories semiconductor integrated circuits
- a memory test apparatus that tests a memory in a state of a wafer before a package is provided with a defect relief processing function for determining whether a defective memory cell of a memory having a redundancy configuration described later can be repaired. This is very different from a memory tester that tests packaged memories.
- FIG. 4 is a block diagram showing a schematic configuration of an example of a prior art memory test device provided with such a failure repair analysis processing device.
- the memory test device TES is roughly composed of a main controller 1 1 1, a pattern generator 1 1 2, a timing generator 1 1 3, Shape formatter 1 1 4, logical comparator 1 1 5, driver 1 1 6, analog level comparator (hereinafter referred to as comparator) 1 1 7, failure analysis memory 1 1 8, defective relief
- An analysis processing device 1 19, a logic amplitude reference voltage source 1 21, a comparison reference voltage source 1 2 2, and a device power supply 1 2 3 are provided.
- the main controller 111 is generally configured by a computer system, stores a test program PM created by a user (programmer) in advance, and controls the entire memory test apparatus according to the test program PM.
- the main controller 1 1 1 1 is connected to the pattern bus 1 1 2, the timing generator 1 1 3, the waveform formatter 1 1 4, the logic comparator 1 1 5, the failure analysis memory 1 1 8, and the failure relief analysis through the test bus TBUS. It is connected to the processing unit 1 19, the logic amplitude reference voltage source 121, the comparison reference voltage source 122, the device power supply 123, etc.
- the IC memory (memory under test) 200 to be tested is formed in the semiconductor device WH in this example.
- various data are set from the main controller 111.
- the pattern generator 111 supplies test pattern data to the waveform formatter 114 according to the test program PM.
- the timing generator 113 generates a timing signal (clock pulse) for controlling the operation timing of the waveform formatter 114, the logic comparator 115, and the like.
- the waveform formatter 114 converts the test pattern data supplied from the pattern generator 112 into a test pattern signal having an actual waveform.
- This test pattern signal is applied to the memory under test 20 through a dry amplifier 116 that amplifies this signal to a waveform having an amplitude value set by the logical amplitude reference voltage source 121.
- the test pattern signal is stored in the memory cell at the address of the memory under test 200 designated by the address signal, and the stored content is read in a subsequent read cycle.
- the response signal read from the memory under test 200 is compared in the comparator 117 with the reference voltage given from the comparison reference voltage source 122, and whether or not it has a predetermined logic level, that is, It is determined whether or not it has a predetermined H logic (high logic) voltage or L logic (low logic) voltage. Responses determined to have a predetermined logic level
- the answer signal is sent to the logical comparator 115, where it is compared with the expected value signal output from the pattern generator 112, and whether or not the memory under test 200 has output a normal response signal is determined. Is determined.
- the memory cell at the address of the memory under test 200 from which the response signal has been read is determined to be defective, and a file signal (file data) indicating this is determined.
- file data file data
- the failure analysis memory 118 usually has the same operation speed and storage capacity as the memory under test 200, and the same address signal as the address signal applied to the memory under test 200 is used as the failure analysis memory. Applied to 1 18. Further, the failure analysis memory 118 is initialized before the test starts. For example, data of logic "0" is written to all the addresses of the failure analysis memory 118 by initialization, and the test of the memory under test 200 generates file data indicating a mismatch from the logical comparator 115. In each case, file data indicating that the tested memory cell is defective is stored in the address of the failure analysis memory 118, which is the same as the address of the memory cell of the memory under test 200 where the mismatch occurred (for example, logic “1”). Is written.
- the memory cell at the address of the memory under test 200 from which the response signal has been read is determined to be normal, and a pass signal indicating this is determined. Generated. This path signal is not normally stored in the failure analysis memory 118.
- the file data stored in the failure analysis memory 118 is read out to the failure repair analysis processing device 120, and it is determined whether the defective memory cell of the tested memory 200 can be repaired. Is determined. Generally, in addition to the address of the defective memory cell of the memory under test 200, the test pattern given to the defective memory cell is also stored in the defect analysis memory 118, and when the test is completed, these data are remedied as defective. The data is read out to the analysis processing device 119 to determine whether or not the defective memory cell can be remedied. Note that in FIG.
- the dry cells 1 16 and the comparator 1 17 are each represented by one symbol, but in practice, the driver 1 16 has the number of input terminals of the memory under test 200, for example, If the number of input terminals is 5 1 2, 5 1 2 are provided, and the number of comparators 1 17 is the same as the number of output terminals of the memory under test 200 (usually the same number of input terminals and output terminals Provided, the same number as drivers 1 1 6 Is) provided. Also, the waveform format 1 1 4, the logical comparator 1 1 5, the failure analysis memory 1 1 8, the failure relief analysis processing device 1 1 9 etc. are shown in one block, but usually the main controller 1 1 The remaining elements except 1 and the timing generator 112 are provided in the same number as the driver 116 (for example, 512).
- the storage area of a semiconductor memory is divided into a plurality of storage areas, and each storage area is constituted by a large number of memory cells arranged along a row (row) address line and a column (column) address line, respectively. Have been.
- a large number of memory cells arranged along the row and column address lines are called a memory cell array in this technical field, and each storage area (each memory cell array) is called a block.
- the storage capacity of the semiconductor memory is the sum of the storage capacities of the plurality of memory cell arrays.
- each column spare line includes the same number of memory cells as the column address lines in the memory cell array
- each row spare line includes the same number of memory cells as the row address lines in the memory cell array.
- FIG. 7 shows an example of a multi-bit memory with a redundancy configuration.
- the memory 200 shown in FIG. 7 is an N + 1 bit memory, and stores the data corresponding to the first data bit (bit-0) .Bit 1 Memory cell array group 210-1-0, second data bit Bit 2 memory cell array group 210-1 to store data equivalent to data (bit-l), bit 3 memory cell array to store data corresponding to the third data bit (bit_2) .., N + 1 N
- the bit N that stores the data corresponding to the 1st data bit (bit-N) N memory cell array Groups 201-N are formed in the same WH Have been. That is, the same number of memory cell array groups as the number of bits of the multi-bit test pattern signal written to the memory 200 are formed on the same wafer WH.
- Figure 7 shows these memory cell array groups. Is shown three-dimensionally, but is actually formed in a planar shape.
- a plurality of (six in this example) memory cell arrays 202 are formed inside each of the memory cell array groups 201-0, 201-1, 201-2,.
- a desired number of column spare lines SC and row spare lines SR are formed in the row (row) address direction ROW and the column (column) address direction C ⁇ L around each memory cell array 202, respectively.
- this example shows a case where two row and column spare lines SR and SC are formed along one side in the row and column address directions of each memory cell array 202, respectively. Needless to say, the position is not limited to the illustrated example.
- FIG. 5 is a block diagram showing a schematic configuration of a prior art defect repair analysis processing device 119 used for testing a multi-bit IC memory as shown in FIG. 7, and FIG. FIG. 2 is a block diagram showing a schematic configuration of a prior art failure analysis memory 118 used when testing a bit IC memory.
- the failure analysis memory 118 includes a storage unit AFM having a data input terminal Dn, an address input terminal An, a data output terminal Qn, and the like, and an address signal supplied from the pattern generator 112.
- An address signal ADRS supplied from the address selector ADS and an address signal FADR supplied from the defect repair analysis processing device 119 are input to the other input terminal A, and an address signal PADR supplied from the address selector ADS is selected. Is applied to the other input terminal B, and a multiplexer MUX for selecting and outputting one of the address signals.
- the defect repair analysis processing device 119 includes a control unit 10 that outputs an analysis start signal ALSRT, a bit designation signal BITSP, a load signal LOAD, and the like, and operates under the control of the control unit 10. And a rescue analysis unit 20 to be implemented.
- the rescue analysis unit 20 includes a bit designating section 21 composed of a bit designating register 21 A, an AND gate group 2 IB, and one OR gate 21 C for performing an OR operation of the AND gate group 21 B, A latch circuit 2 for temporarily storing data output from the bit designating unit 21; an arithmetic processing unit 23 for performing an arithmetic operation on data read from the latch circuit 22; a memory cell array in which a defective memory cell is detected And the address of the failure analysis memory 118 for performing the repair analysis processing. And an address generator 24 for generating an address signal for accessing the address.
- the rescue analysis unit 20 starts the rescue analysis operation when receiving the analysis start signal ALSRT from the control unit 10, and when the rescue analysis operation of one data bit (one memory cell array group) is completed, the control starts. Send the analysis end signal ALEND to Part 10.
- the bit designation register 21 A When the load signal LOAD is applied from the control unit 10, the bit designation register 21 A is loaded with the bit designation signal BITSP applied to the data terminal, and the memory under test 20 A to be subjected to the repair analysis processing is loaded. Specifies one data bit of 0 (one of the memory cell array group). Actually, the data bit memory area of the failure analysis 8 in which the failure data of one data bit (memory cell array group) of the memory under test 200 is stored is specified.
- the AND gate group 21B the bit designating signal BITSP from the bit designating register 21A is applied to one input terminal, and the other input terminal outputs the failure analysis memory data from the failure analysis memory 118. Fail data FAIL read from the terminal Qn is sequentially applied. Therefore, the number of AND gate groups 21B is equal to the number of data bits (memory cell array group) of the memory under test 200, and corresponds to the bit specification signal BITSP from the bit specification register 21A. Only one AND gate is enabled.
- the multiplexer MUX of the failure analysis memory 118 selects the other input terminal B and supplies it to the other input terminal B from the pattern generator 112 via the address selector ADS.
- the supplied address signal PADR is supplied to the address input terminal An of the storage unit AFM. Therefore, each time a mismatch occurs in the logical comparator 115, the data input of the storage unit AFM is input to the same address of the storage unit AFM as the address of the defective memory cell of the memory under test 200 in which the mismatch occurred.
- the fail data FAIL applied to the terminal Dn is stored.
- “fail data” has the same bit width as the data read from the memory under test 200 when the memory under test 200 is a multi-bit memory. If no mismatch is detected in the logical comparator 115, all the bits are logic ⁇ 0 '', and if a mismatch is detected, the data bit in which the mismatch occurred is logic ⁇ 0 ''. It refers to the data set to "1". For example, if the memory under test 200 is an 8-bit memory and is composed of eight data bits (memory cell array group), the 8-bit data from data bit 1 to data bit 8 Is written to the memory under test 200.
- the multiplexer MUX of the failure analysis memory 1 18 selects one of the input terminals A, and sends it to the one input terminal A from the address generator 24 of the failure repair analysis processor 1 19 shown in FIG.
- the received address signal FADR is applied to the address input terminal An of the storage unit AFM to access the file data FAIL stored in the storage unit AFM.
- Fail data FAIL read from the data output terminal Qn of the storage unit AFM is sequentially supplied to the other input terminal of the AND gate group 21 B of the bit designation unit 21 of the defect repair analysis processing device 119.
- the bit specification register 21A controls only one of the AND gates 21B corresponding to the specified data bit to the enabled state, so that the failure data FAIL read from the storage unit AFM is specified. Only the failed data bits (memory cell array group) in the memory area are taken out to the latch circuit 22 (one-bit fail data).
- the 1-bit fail data taken out by the latch circuit 22 is recognized by the address signal generated from the address generator 24 as to which fail data is on which address line of which memory cell array 202. Further, the position (address) of the defective memory cell on the address line is specified and taken into the operation processing unit 23.
- the c operation processing unit 23 receives the number of fail data taken in for each memory cell array 202. Are summed up for each address line, and whether or not the address line in which the defective memory cell exists can be repaired by the spare lines SC and SR provided in each memory cell array 202 is calculated.
- the arithmetic processing section 23 reads the stored data in the block file memory 25- If there is a memory cell array in which a defective memory cell has not been detected, the address signal of the memory cell array to be subjected to the next repair analysis processing without generating an address signal for the memory cell array from the address generator 24. Generate. In other words, the repair analysis processing of the memory cell array in which the defective memory cell is not detected is not performed, and the repair analysis processing of the next memory cell array to be subjected to the repair analysis processing is immediately executed.
- the fail data of the data bit (memory cell array group) designated by the bit designating section 21 is read out by a 1-bit address signal and sent to the arithmetic processing section 23.
- a plurality of memory cell array groups 210-1-0, 210-1 and 210-1-2 ,..., 2 0 1—N are specified one by one in the bit specification section 21 and N + 1 memory cell array groups 2 0 1—0, 2 0 1—1, 2 0 1, 2, ⁇ ⁇ ⁇ ⁇ Is performing rescue analysis processing for each group. Therefore, there is a disadvantage that the time required for the repair analysis processing is considerably long.
- the defect analysis memory 118 shown in FIG. 6 and the defect repair analysis processing device 111 shown in FIG. are operated simultaneously and in parallel to execute the defect analysis of each memory under test.
- the processing time of the defect repair analysis processing device for executing the defect repair analysis processing of the memory under test having a large number of defective memory cells naturally increases, and the processing speed decreases.
- the operation of the defect relief analysis processing device in which the defect repair analysis processing has been completed is stopped, and the defect relief is performed in a state of waiting.
- the analysis process will be continued. Therefore, if there is a failure repair analysis device that takes a long time to perform the failure repair analysis process, the failure repair analysis processing time of the entire device becomes the processing time of the longest failure repair analysis processing device. Therefore, there was a problem that the defect repair analysis process could not be speeded up.
- An object of the present invention is to provide a defect repair analysis method capable of speeding up a defect repair analysis process of a memory having a redundancy configuration.
- Another object of the present invention is to provide a memory test apparatus including a failure repair analysis processing device capable of accelerating the failure repair analysis processing of a memory having a redundancy configuration.
- a failure analysis memory for storing file data representing a failure memory cell of a memory under test having a redundancy configuration, and the failure read out from the failure analysis memory after completion of the test.
- a defect repair analysis processing method executed in a memory test apparatus comprising: a defect repair analysis processing device for analyzing whether or not a defective memory cell of a memory under test can be repaired based on data.
- the defect repair analysis method further includes a step of checking whether or not there is an unprocessed data bit memory area in which the repair analysis processing has not been performed.
- each repair analysis unit upon completion of the repair analysis processing for the file data in the data bit memory area assigned to itself and to be subjected to the repair analysis processing, completes the detected unprocessed data. Immediately executes the repair analysis processing for the fail data in the data bit memory area.
- the step of sequentially reading the fail data from the plurality of designated data bit memory areas of the failure analysis memory includes sequentially switching address signals for the plurality of designated data bit memory areas respectively output from the plurality of repair analysis units.
- the cycle of sequentially switching the plurality of address signals is a cycle obtained by dividing the cycle of the address signal for each designated data bit memory area by the number of designated data bit memory areas.
- the file data read from the good analysis memory is file data that is sequentially switched at the same cycle as the switching cycle of the address signal applied to the failure analysis memory.
- a failure analysis memory for storing file data representing a failure memory cell of a memory under test having a redundancy configuration, and a plurality of repair analysis units, each repair analysis unit comprising: Of the file data stored in each of the plurality of data bit memory areas of the failure analysis memory, an arbitrary data bit memory area is designated and the fail data is read, and whether the memory cell array associated with the read fail data can be rescued is determined.
- a plurality of rescue analysis units configured to analyze the above, an access control means for sequentially switching and applying an address signal output from each of the plurality of rescue analysis units to the failure analysis memory; From the specified data bit memory area of the failure analysis memory
- a memory test device comprising: data distribution means for distributing read and read file data to the plurality of repair analysis units corresponding thereto; and a control unit for controlling a repair analysis processing operation of the plurality of repair analysis units.
- each of the plurality of repair analysis units is provided with a separate address generator, and the address generator generates an address signal for a designated data bit memory area.
- the defect analysis memory can be accessed independently of the above operation.
- the access control means is configured to sequentially switch address signals for a plurality of designated data bit memory areas respectively output from the plurality of repair analysis units and apply the address signals to the failure analysis memory.
- the cycle of sequentially switching the address signal of the specified data bit memory area is a cycle obtained by dividing the cycle of the address signal for each designated data bit memory area by the number of designated data bit memory areas, and the file data read from the failure analysis memory is as described above.
- the failure data is sequentially switched at the same cycle as the switching cycle of the address signal applied to the failure analysis memory.
- the control unit applies an analysis start signal, a bit designation signal, and a load signal to the plurality of repair analysis units, respectively, and receives an analysis end signal from each repair analysis unit to perform the plurality of repairs. Controls the analysis analysis operation of the analysis unit. In addition, the control unit executes the repair analysis process every time the repair analysis unit that has completed the repair analysis processing operation for the memory cell array associated with the file data in the designated data bit memory area transmits an analysis end signal.
- An unprocessed data bit detection means for detecting the presence or absence of an unprocessed data bit memory area, and, when an unprocessed data bit memory area is detected, a rescue analysis unit having completed the rescue analysis processing operation.
- Data bit updating means for updating the applied bit designating signal to the bit designating signal for the detected unprocessed data bit memory area.
- the failure analysis memory includes at least the same number of data bit memory areas as the number of bits of the memory under test, and the multi-bit memory under test described above.
- the file data of each data bit is stored in the corresponding data bit memory area of the failure analysis memory.
- the failure analysis memory includes at least the same number of data bit memory areas as the number of memory cell arrays of the memory under test.
- the failure data of each memory cell array of the memory under test is stored in the corresponding data bit memory area of the failure analysis memory.
- a plurality of data bits or a plurality of memory cell arrays can be simultaneously subjected to the repair analysis process. If the number is N, it is possible to execute the defect repair analysis processing at N times the speed.
- each repair analysis unit operates independently, and when the repair analysis processing operation of the data bit or the memory cell array allocated to itself is completed, the repair analysis processing operation for the next unprocessed data bit or memory cell array is performed. Execute Therefore, since one repair analysis unit performs a repair analysis process on a memory cell array having a large number of defective memory cells, the repair analysis process takes a long time and the repair analysis process operation is completed. Even if it is delayed, the remaining repair analysis unit sequentially performs the repair analysis processing on the unprocessed data bits or the memory cell array, so even if the defective memory cell is biased to a specific memory cell array, the entire repair analysis processing time Is considerably shorter. Therefore, the disadvantages of the prior art can be eliminated. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a block diagram showing a schematic configuration of an embodiment of a memory test apparatus according to the present invention provided with a defect repair analysis processing device for performing a memory defect repair analysis method according to the present invention.
- FIG. 2 is a block diagram showing a detailed configuration of the defect repair analysis processing device shown in FIG. 1 ( FIG. 3 is a timing chart for explaining the operation of the defect repair analysis processing device shown in FIG. 2).
- FIG. 4 is a block diagram showing an outline of a general memory test apparatus of the prior art.
- FIG. 5 is a block diagram showing a detailed configuration of a defect repair analysis processing device used in the memory test device shown in FIG.
- FIG. 6 is a block diagram showing a detailed configuration of a failure analysis memory used in the memory test device shown in FIG.
- FIG. 7 is a perspective view for explaining a configuration of a memory having a multi-bit redundancy configuration.
- FIG. 1 is a block diagram showing a schematic configuration of an embodiment of a memory test apparatus according to the present invention provided with a defect repair analysis processing device for performing a memory defect repair analysis method according to the present invention.
- FIG. 2 is a block diagram showing a detailed configuration of the defect repair analysis processing device shown in FIG.
- the failure analysis memory 118 may have the same configuration as that of the prior art failure analysis memory 118 described with reference to FIG. 6, so that the detailed configuration is not shown.
- elements and portions corresponding to those shown in FIG. 5 are denoted by the same reference numerals, and descriptions thereof will be omitted unless necessary.
- the defect repair analysis processing device 119 includes a control unit 110, (2) A point composed of two repair analysis units 2 OA and 2 OB, an access controller 30, a data distributor 40, and a unit selection signal generator 5 °, and an unprocessed control unit 10. It is characterized in that a data bit detector 11 and a data bit updating device 12 are further provided.
- each configuration of the first and second repair analysis units 2OA and 20B may have the same configuration as that of the prior art relief analysis unit 20 shown in FIG. Therefore, also in this embodiment, as shown in FIG. 2, each of the first and second repair analysis units 2OA and 20B includes the bit designation register 21A, the AND gate group 21B, and the AND gate 21B.
- a bit designator 21 composed of one OR gate 21C for taking a logical sum of the group 21B, a latch circuit 22 for temporarily storing data output from the bit designator 21, and a readout from the latch circuit 22
- An arithmetic processing unit 23 that performs data arithmetic, a block fail memory 25 that stores a memory cell array in which a defective memory cell is detected, and an address signal that accesses an address of the defect analysis memory 118 when performing a repair analysis process.
- a generated address generator 24 is also used to generate a generated address generator 24.
- the first and second repair analysis units 20A and 20B When the first and second repair analysis units 20A and 20B receive the analysis start signals ALSRT1 and AL SRT2 from the control unit 10, respectively, the first and second repair analysis units 20A and 20B start the repair analysis operation and the address signal FAD from the address generator 24. Start generation of R1 and FAD R2.
- the address signals FADR 1 and FADR 2 output from the respective address generators 24 are applied to the failure analysis memory 118 through the access controller 30.
- the access controller 30 alternately switches address signals FADR 1 and FADR 2 output from the first and second repair analysis units 2OA and 20B, respectively, and applies the signals to the failure analysis memory 118. Therefore, the two repair analysis units 2OA and 20B alternately access the failure analysis memory 118 and read the fail data FAIL as failure memory cell information from the storage unit AFM.
- the access controller 30 can be constituted by, for example, a multiplexer.
- the fail data FA IL read from the failure analysis memory 118 is sent to the data distributor 40 of the failure repair analysis processor 119 via the transmission line 60.
- the data distributor 40 includes first and second two latch circuits 41 and 42 and one inverter 43, and the fail data FA IL is supplied to the data input terminals D of the latch circuits 41 and 42. Each is applied.
- the other input of latch circuits 41 and 42 The terminals G are inverting input terminals, respectively.
- the inverting input terminal G of the first latch circuit 41 is directly connected to the output terminal of the unit selection signal generator 50, and the inverting input terminal G of the second latch circuit 42. Is connected to the output terminal of the unit selection signal generator 50 through the receiver 43.
- the unit selection signal generator 50 has one OR gate to which the first clock signal CK1 and the second clock signal CK2 are applied, and one latch to which the output signal of the OR gate is applied to the clock terminal CK. And a circuit for generating a unit selection signal UNSEL for selecting the first and second repair analysis units 2OA and 20B, respectively.
- the unit selection signal UNSEL output from the unit selection signal generator 50 is supplied to the inverting input terminals G of the first and second latch circuits 41 and 42 of the data distributor 40 as described above. As shown in 1, it is supplied to the control terminal of the access controller 30.
- the data distributor 40 supplies the fail data FAIL input from the failure analysis memory 118 to the first and second repair analysis units 2OA and 20B alternately under the control of the unit selection signal UNSEL. Is configured. Specifically, when the first repair analysis unit 2 OA accesses the failure analysis memory 118 by giving the address signal FAD R 1, the file data FAI read from the address of the failure analysis memory 118 L is input to the first rescue analysis unit 2 OA. When the second repair analysis unit 20B accesses the failure analysis memory 118 by supplying the address signal FADR2 to the failure analysis memory 118, the failure data FAIL read from the address of the failure analysis memory 118 is replaced by the second relief analysis unit 20B. It is configured to input to the analysis unit 20B.
- the first and second repair analysis units 2 OA and 20B send the analysis end signals ALEND 1 and ALEND 2 to the control unit 10, respectively. send.
- the first and second clock signals CK1 and CK2 input to the unit selection signal generator 50 are generated at a period of time 2T, as shown in FIGS. 3A and 3C, respectively, and They have a phase difference of time T from each other. Therefore, the unit selection signal First and second clock signals CK 1 and CK 2 are alternately input to the generator 50 at a period T.
- the unit selection signal generator 50 inverts the logic “1” from the logic “1” to the logic “0” at each rising edge of the first clock signal CK1, and outputs the inverted clock signal at each rising edge of the second clock signal CK2. Generates the unit selection signal UNSEL shown in Figure 3 (1), which reverses the logic “0” to the logic “1”.
- the unit selection signal UNSEL is generated as shown in FIG. Each time, a logic "0” and a logic "1" alternate.
- the arithmetic processing unit 23 reads the data stored in the block file memory 25, and the first repair analysis unit 20 A performs a data bit (memory cell array group) to be subjected to the repair analysis processing.
- the address generator 24 does not generate the address signal for the memory cell array, but generates the address signal of the next memory cell array to be subjected to the repair analysis processing. In other words, the repair analysis processing of the memory cell array in which the defective memory cell is not detected is not performed, and the repair analysis processing of the memory cell array to be repair analyzed next is immediately executed.
- the address generator 24 generates an address signal FADR 1 (addresses a, a + l, a + 2, a + 3,...) In synchronization with the rising edge of the first clock signal CK1, as shown in FIG. 3B. I do.
- the arithmetic processing unit 23 reads the data stored in the block file memory 25, and the second repair analysis unit 2OA executes the data bit (the second 1) If the repair analysis unit 20A does not have a defective memory cell in the memory cell array of a data bit different from the data bit to be subjected to the repair analysis processing, the address generator 24 sends the data to the memory cell array.
- the address signal of the memory cell array to be subjected to the repair analysis processing is generated without generating the address signal.
- the address generator 24 of the second repair analysis unit 20B synchronizes with the rising edge of the second clock signal CK2 and, as shown in FIG. 3D, outputs the address signal FADR2 (address b, b + l, b + 2, b + 3, ⁇
- the access controller 30 synchronizes with the unit selection signal UNSEL, as shown in FIG.
- the address signal FADR 1 and the address signal FADR 2 are alternately switched at the cycle T and output.
- the access controller 30 outputs address signals FAD R in the order of addresses a, b, a + l, b + l, a + 2, b + 2, a + 3, b + 3, Applied to the failure analysis memory 1 18. Since the speed at which the address signals FADR 1 and F ADR 2 switch is 1/2 of the period 2T of the first clock CK1 and the second clock CK2, the address signal which switches at twice the speed of the clock signal The address signal FADR composed of FADR 1 and FADR 2 is applied to the failure analysis memory 118.
- the storage unit AFM provides file data FD (a) and FD (a + 1) that exist in two data bits respectively.
- FD (a + 2), ⁇ 'and FD (b), FD (b + 1), FD (b + 2), ⁇ ⁇ ' are alternated with a period T — evening FA IL force, as shown in Figure 3G
- FD (a), FD (b), FD (a + 1)-FD (b + 1), FD (a + 2), FD (b + 2) are read in the order
- the read cycle is also T
- the file data FAIL in which the file data respectively existing in the two data bits switches at twice the speed of the clock signal is read.
- the fail data that switches at twice this speed is input to the data distributor 40 through the transmission line 60.
- the first and second latch circuits 41 and 42 alternately take in the file data FAIL under the control of the unit selection signal UNSEL shown in FIG. 3E. Since these latch circuits 41 and 42 hold the acquired file data until the next first and second clock signals CLK 1 and CLK 2 are applied, respectively, the fail data FAIL latched by the first latch circuit 41 1 is switched every 2T as shown in FIG. 3H, and similarly, the fail data FAIL 2 latched by the second latch circuit 42 is switched every 2T as shown in FIG. 3I. Replace it.
- the fail data FAIL 1 and FAIL 2 latched by the first and second latch circuits 41 and 42 are the AND gate groups of the bit designation section 21 of the first and second repair analysis units 20A and 20B. It is supplied to the other input terminal of 21 B, respectively.
- both rescue analysis units 2 OA and 20 B use the bit designation registers 21 A and 21 A.
- fail data of the designated data bit (memory cell array group) is applied to latch circuits 22 and 22 through OR gates 21C and 21C, respectively, and latched.
- FIG. 3J shows the fail data FF 1 latched in the latch circuit 22 of the first repair analysis unit 2OA
- FIG. 3K shows the fail data FF latched in the latch circuit 22 of the second repair analysis unit 20B. Shows 2.
- the arithmetic processing units 23 and 23 of the first and second repair analysis units 2 OA and 20 B respectively total the number of captured file data for each memory cell array 202 for each address line. Then, the address line where the defective memory cell is present is processed by the spare lines SC and SR provided in each memory cell array 202 to determine whether it can be repaired. Further, each arithmetic processing unit 23 reads the data stored in the block fail memory 25, and does not perform the repair analysis processing in the case of a memory cell array in which a defective memory cell is not detected. Causes the ray's rescue analysis to be performed immediately.
- the speed of the address signals FADR 1 and FADR 2 generated from the address generators 24 and 24 of the first and second repair analysis units 2 OA and 20 B, respectively, is twice the speed of the address signals FADR 1 and FADR 2.
- To access the failure analysis memory 118 read the two data bits of the file data FAIL 1 and FAIL 2 sequentially from the address of the failure analysis memory 118, and read the first and second repair analysis units 2OA and 2OA. 20B, each of which can be rescued by the spare lines SC and SR for each of the memory cells under test 2 0 0, multiple data bits (memory cell array group) 201-0, 201-1, 1, 201-2, ... It is configured to perform an analysis process of whether or not it is.
- the first and second repair analysis units 20A and 20B are configured so as to perform the defect repair analysis process simultaneously in parallel with one data bit (one memory cell array group) each.
- a transmission line 61 for transmitting the address signal FADR from the access controller 30 to the failure analysis memory 118 and a transmission line for transmitting the fail data FA IL from the failure analysis memory 118 to the failure relief analysis processing device 119 are provided.
- Each of the 60 is a multi-bit transmission line of, for example, about 16 bits or 32 bits, so it is difficult to lay each of the first and second rescue analysis units 2 OA and 2 ⁇ B independently. . For this reason, in this embodiment, the transmission lines 60 and 61 are time-divided and the two rescue analysis units 20 are used. It is configured for use in A and 20B.
- the transmission lines 60 and 61 are used in a time-sharing manner, since both rescue analysis units 20A and 20B have their own address generators 24, the analysis start signals ALSRT1 and ALSRT2 are sent from the controller 10. Receipt of each, the two repair analysis units 2OA and 20B can independently start the repair analysis process.
- the first and second repair analysis units 2OA and 20B When the first and second repair analysis units 2OA and 20B complete the repair analysis processing of the designated data bit, they transmit an analysis end signal A LEND 1 and ALEND 2 to the controller 10, respectively.
- the controller 10 Upon receiving the analysis end signals ALEND 1 and ALEND 2, the controller 10 activates the unprocessed data bit detector 11 and searches for the presence of unprocessed data bits.
- an unprocessed data bit is detected, information on the unprocessed data bit is provided to the data bit updating device 12.
- the data bit updating device 12 has detected the bit designation signal BI TSP given to the bit designation register 21 A of the repair analysis unit 2 OA or 20B that transmitted the analysis end signal A LEND 1 or ALEND 2. Update to unprocessed data bit.
- the repair analysis processing of one repair analysis unit is performed on the memory cell array group corresponding to the data bit allocated to itself, for example, the bit 1 memory cell array group 201-10.
- the second repair analysis unit 20B has completed the repair analysis processing of the memory cell array group corresponding to the data bit allocated to itself, for example, the bit 2 memory cell array group 201-1.
- the control unit 10 designates the third data bit bit-2 for the second repair analysis unit 20B, and provides the repair analysis of the bit 3 memory cell array group 201-2 to the second repair analysis unit 20B. Execute the process.
- the control unit 10 designates the fourth data bit bit-3 to the first repair analysis unit 20A,
- the first repair analysis unit 20A executes the repair analysis processing of the bit 4 memory cell array group 201-3.
- the two repair analysis units 2OA and 20B independently receive the designation of the data bit without being affected by the delay of the repair analysis processing operation of the one repair analysis unit.
- the repair analysis processing operation can be executed. Therefore, one of the repairs for executing the failure repair analysis processing of a memory cell array having a large number of defective memory cells. Even if the processing speed of the repair analysis unit is reduced, the other repair analysis unit continues its defect analysis processing operation, so that the defect repair analysis processing time of the entire apparatus is shortened and the defect repair analysis processing is accelerated. can do.
- the repair analysis unit when the two repair analysis units are operated in parallel at the same time, and one of the repair analysis units is completed with respect to the data bits (memory cell array group) that is ahead of the other, the repair analysis unit next proceeds. Since a repair analysis process can be performed on a data bit in response to designation of a data bit to be analyzed for repair, a repair analysis unit that performs a repair analysis process on a data bit having a large number of defective memory cells can be used. Even if the processing time is delayed, the other repair analysis unit takes the lead and executes the failure repair analysis processing of the next data bit.Therefore, the number of defective memory cells may be unevenly distributed to a specific memory cell array. However, the effect is reduced, and the defect repair analysis processing can be completed in a short time as a whole.
- the defect repair analysis processing device 119 for the sake of simplicity, two repair analysis units 2 OA and 20 B are provided in the defect repair analysis processing device 119, but three or more repair configurations having the same configuration are provided. It goes without saying that the analysis unit may be provided in the defect repair analysis processing device 119. If the number of repair analysis units is further increased, the defect repair analysis process can be further accelerated. For example, if the number of defective repair analysis units is N, the defective repair analysis time can be set to 1 ZN.
- the present invention is not multi-bit (that is, 1 bit).
- the present invention can also be applied to a case where an analysis process is performed to determine whether or not a defective memory cell detected from a memory having a redundancy configuration (of bits) can be repaired.
- the memory under test is not a multi-bit memory, fail data indicating defective memory cells in a plurality of memory cell arrays of the memory under test, and in the case of a multi-bit memory, fail data indicating a defective memory cell for each data bit.
- Each is stored in multiple data bit memory areas of the failure analysis memory to be stored. That is, fail data representing a defective memory cell of one memory cell array of the memory under test is stored only in one corresponding data bit memory area of the failure analysis memory 118. Therefore, if the memory under test is not a multi-bit memory, multiple data bit The file data read from each memory area becomes file data representing a defective memory cell detected from each of the plurality of memory cell arrays of the tested memory.
- a plurality of repair analysis units are provided for a common failure analysis memory, and a plurality of data bits are simultaneously processed by the plurality of repair analysis units.
- the repair analysis processing of a plurality of memory cell arrays is executed, the time required for the repair analysis processing can be significantly reduced, and therefore, there is a remarkable advantage that the speed of the defect repair analysis processing can be increased.
Landscapes
- Tests Of Electronic Circuits (AREA)
- For Increasing The Reliability Of Semiconductor Memories (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US10/399,082 US6907385B2 (en) | 2000-10-19 | 2001-10-19 | Memory defect redress analysis treating method, and memory testing apparatus performing the method |
KR10-2003-7004770A KR100529743B1 (ko) | 2000-10-19 | 2001-10-19 | 메모리의 불량구제해석 처리방법 및 이 방법을 실시하는메모리 시험장치 |
JP2002537013A JP3923428B2 (ja) | 2000-10-19 | 2001-10-19 | メモリの不良救済解析処理方法及びこの方法を実施するメモリ試験装置 |
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JP2000318887 | 2000-10-19 | ||
JP2000-318887 | 2000-10-19 |
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WO2002033708A1 true WO2002033708A1 (fr) | 2002-04-25 |
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PCT/JP2001/009217 WO2002033708A1 (fr) | 2000-10-19 | 2001-10-19 | Procede de traitement -par analyse- de la reparation de defauts de memoire et appareil d'essai de memoire mettant en oeuvre ce procede |
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US (1) | US6907385B2 (ja) |
JP (1) | JP3923428B2 (ja) |
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WO (1) | WO2002033708A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005091305A1 (ja) * | 2004-03-24 | 2005-09-29 | Advantest Corporation | 試験装置及び試験方法 |
WO2007032194A1 (ja) * | 2005-09-15 | 2007-03-22 | Advantest Corporation | 試験装置、試験方法、解析装置及びプログラム |
US8316264B2 (en) | 2009-12-18 | 2012-11-20 | Kabushiki Kaisha Toshiba | Failure analysis method, failure analysis apparatus, and computer program product |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7069377B2 (en) * | 2003-05-08 | 2006-06-27 | Micron Technology, Inc. | Scratch control memory array in a flash memory device |
EP1653239B1 (en) * | 2003-05-15 | 2007-11-14 | Advantest Corporation | Test apparatus with waveform formatter |
US20080270854A1 (en) * | 2007-04-24 | 2008-10-30 | Micron Technology, Inc. | System and method for running test and redundancy analysis in parallel |
US8977912B2 (en) * | 2007-05-07 | 2015-03-10 | Macronix International Co., Ltd. | Method and apparatus for repairing memory |
TWI409820B (zh) * | 2009-02-18 | 2013-09-21 | King Yuan Electronics Co Ltd | Semiconductor Test System with Self - Test for Memory Repair Analysis |
KR102650154B1 (ko) * | 2016-12-08 | 2024-03-22 | 삼성전자주식회사 | 가상 페일 생성기를 포함하는 메모리 장치 및 그것의 메모리 셀 리페어 방법 |
US10643735B1 (en) * | 2017-10-27 | 2020-05-05 | Pdf Solutions, Inc. | Passive array test structure for cross-point memory characterization |
CN112216335B (zh) * | 2019-07-09 | 2022-12-02 | 长鑫存储技术有限公司 | 存储器故障处理方法和装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10148658A (ja) * | 1996-11-19 | 1998-06-02 | Advantest Corp | メモリ試験装置 |
JP2000091388A (ja) * | 1998-09-08 | 2000-03-31 | Hitachi Electronics Eng Co Ltd | Ic試験装置の救済判定方式 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4414665A (en) * | 1979-11-21 | 1983-11-08 | Nippon Telegraph & Telephone Public Corp. | Semiconductor memory device test apparatus |
US4460997A (en) * | 1981-07-15 | 1984-07-17 | Pacific Western Systems Inc. | Memory tester having memory repair analysis capability |
US4736373A (en) * | 1981-08-03 | 1988-04-05 | Pacific Western Systems, Inc. | Memory tester having concurrent failure data readout and memory repair analysis |
JP2842923B2 (ja) * | 1990-03-19 | 1999-01-06 | 株式会社アドバンテスト | 半導体メモリ試験装置 |
JP2577120Y2 (ja) * | 1993-04-15 | 1998-07-23 | 株式会社アドバンテスト | 過剰パルス印加の禁止回路 |
JPH0935496A (ja) * | 1995-07-12 | 1997-02-07 | Advantest Corp | メモリ試験装置 |
JPH0963300A (ja) * | 1995-08-22 | 1997-03-07 | Advantest Corp | 半導体メモリ試験装置のフェイル解析装置 |
KR987000574A (ko) * | 1995-09-22 | 1998-03-30 | 오오우라 히로시 | 메모리 시험장치 |
TW374951B (en) * | 1997-04-30 | 1999-11-21 | Toshiba Corp | Semiconductor memory |
US6459292B1 (en) * | 1999-04-30 | 2002-10-01 | Advantest Corporation | Testing system for semiconductor device |
-
2001
- 2001-10-19 WO PCT/JP2001/009217 patent/WO2002033708A1/ja active IP Right Grant
- 2001-10-19 US US10/399,082 patent/US6907385B2/en not_active Expired - Fee Related
- 2001-10-19 KR KR10-2003-7004770A patent/KR100529743B1/ko not_active IP Right Cessation
- 2001-10-19 JP JP2002537013A patent/JP3923428B2/ja not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10148658A (ja) * | 1996-11-19 | 1998-06-02 | Advantest Corp | メモリ試験装置 |
JP2000091388A (ja) * | 1998-09-08 | 2000-03-31 | Hitachi Electronics Eng Co Ltd | Ic試験装置の救済判定方式 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005091305A1 (ja) * | 2004-03-24 | 2005-09-29 | Advantest Corporation | 試験装置及び試験方法 |
US7441166B2 (en) | 2004-03-24 | 2008-10-21 | Advantest Corporation | Testing apparatus and testing method |
WO2007032194A1 (ja) * | 2005-09-15 | 2007-03-22 | Advantest Corporation | 試験装置、試験方法、解析装置及びプログラム |
KR100939198B1 (ko) | 2005-09-15 | 2010-01-28 | 가부시키가이샤 어드밴티스트 | 시험 장치, 시험 방법, 해석 장치, 및 프로그램 |
US7689880B2 (en) | 2005-09-15 | 2010-03-30 | Advantest Corporation | Test apparatus, test method, analyzing apparatus and computer readable medium |
US8316264B2 (en) | 2009-12-18 | 2012-11-20 | Kabushiki Kaisha Toshiba | Failure analysis method, failure analysis apparatus, and computer program product |
Also Published As
Publication number | Publication date |
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JP3923428B2 (ja) | 2007-05-30 |
KR20030036884A (ko) | 2003-05-09 |
US6907385B2 (en) | 2005-06-14 |
US20030236648A1 (en) | 2003-12-25 |
JPWO2002033708A1 (ja) | 2004-02-26 |
KR100529743B1 (ko) | 2005-11-17 |
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