WO2009141849A1 - パターン発生器 - Google Patents
パターン発生器 Download PDFInfo
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- WO2009141849A1 WO2009141849A1 PCT/JP2008/001274 JP2008001274W WO2009141849A1 WO 2009141849 A1 WO2009141849 A1 WO 2009141849A1 JP 2008001274 W JP2008001274 W JP 2008001274W WO 2009141849 A1 WO2009141849 A1 WO 2009141849A1
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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
- G11C29/56004—Pattern generation
Definitions
- the present invention relates to a pattern generator used in a memory testing apparatus.
- DRAM Dynamic Random Access Memory
- SRAM Static Random Access Memory
- test apparatus When testing a memory, data is written to a cell in the memory, and then the data is read to determine whether it matches an expected value, whether the memory as a whole is good or bad, or a defective cell is specified.
- an address signal generation circuit for generating an address signal indicating an address of an access destination cell is provided. The test apparatus writes data and reads data using the address signal generated by the address signal generation circuit.
- the present invention has been made in view of such problems, and one of its purposes is to provide a signal generator that can invert and control only necessary bits when necessary.
- An aspect of the present invention relates to a pattern generator mounted on a memory test apparatus.
- This pattern generator has an address signal generation circuit that generates an address signal indicating an address to be accessed by the memory, and an operation prohibition signal that has the same bit width as the address signal and prohibits arithmetic processing for each bit of the address signal.
- An operation prohibition signal generation unit that generates a plurality of patterns, a selector that selects and outputs one of a plurality of patterns of operation prohibition signals generated by the operation prohibition signal generation unit, an address signal, and an operation process on the address signal
- An address signal arithmetic circuit that performs arithmetic processing and outputs the result.
- a plurality of patterns of operation prohibition signals that specify the bits that are permitted to be operated and the bits that are prohibited are prepared, and depending on the operation of the memory being the device under test, it is necessary to select one of them. Sometimes only the necessary bits can be inverted.
- the selector may select one of the operation inhibition signals according to the burst length at the time of burst transfer of the memory. It is possible to access an appropriate address by changing the position of the bit that permits the arithmetic processing according to the burst length.
- the calculation process by the address signal calculation circuit may be an address signal inversion process. Further, the arithmetic processing may be conversion processing from a logical address to a physical address.
- the address signal arithmetic circuit includes an AND gate that generates a logical product of a signal corresponding to the operation prohibition signal selected by the selector and an operation control signal, and the corresponding bits of the signal output from the AND gate and the address signal are mutually exclusive. And an XOR gate for generating a logical OR.
- the calculation prohibition signal generation unit may include a plurality of registers that respectively store a plurality of patterns of calculation prohibition signals.
- the pattern generator includes a data signal generation circuit that generates a data signal to be written in a memory, an operation prohibiting signal that has the same bit width as the data signal, and that prohibits arithmetic processing for each bit of the data signal.
- An operation prohibition signal generation unit to be generated, a selector that selects and outputs one of a plurality of patterns of operation prohibition signals generated by the operation prohibition signal generation unit, a data signal, and an operation that instructs an operation process on the data signal
- the control signal and the operation prohibition signal selected by the selector are received and the operation control signal is asserted, only the bits of the data signal that are not prohibited by the operation prohibition signal are processed.
- a data signal arithmetic circuit that outputs the data.
- a plurality of operation prohibition signals that prescribe the operation processing permission bit and the prohibition bit are prepared, and it is necessary depending on the operation of the memory as the device under test by selecting one of them. Only necessary bits can be inverted at any time.
- the calculation process by the data signal calculation circuit may be a data signal inversion process. Further, the calculation process may be a conversion process based on a predetermined rule.
- the data signal arithmetic circuit includes an AND gate that generates a logical product of a signal corresponding to the operation prohibition signal selected by the selector and the operation control signal, and the corresponding bits of the signal output from the AND gate and the data signal are mutually exclusive. And an XOR gate for generating a logical OR.
- the calculation prohibition signal generation unit may include a plurality of registers that respectively store a plurality of patterns of calculation prohibition signals.
- DESCRIPTION OF SYMBOLS 100 ... Test apparatus, 102 ... Timing generator, 104 ... Pattern generator, 106 ... Waveform shaper, 108 ... Write driver, 110 ... Comparator, 112 ... Logic comparison part, 200 ... DUT, 10 ... Address signal generation circuit, 12 ... Inversion prohibition signal generation unit, 14... Selector, 16... Address signal inversion circuit, 18... AND gate, 20.
- FIG. 1 is a block diagram showing an overall configuration of a test apparatus 100 according to an embodiment.
- the test apparatus 100 has a function of determining the quality of the DUT 200 or specifying a defective portion.
- the DUT 200 is a memory (RAM) having a burst transfer function.
- the test apparatus 100 includes a timing generator 102, a pattern generator 104, a waveform shaper 106, a write driver 108, a comparator 110, and a logic comparison unit 112.
- the pattern generator 104 generates a timing set signal (hereinafter referred to as “TS signal”) and supplies it to the timing generator 102.
- the timing generator 102 generates a periodic clock CKp and a delay clock CKd based on the timing data specified by the TS signal, supplies the periodic clock CKp to the pattern generator 104, and supplies the delayed clock CKd to the waveform shaper 106. Supply.
- the pattern generator 104 generates an address signal ADRS indicating each of the blocks which are a plurality of storage areas of the DUT 200 and a plurality of test pattern data Dt to be written in each of the plurality of blocks, and the waveform shaper 106 To supply.
- the waveform shaper 106 generates a test pattern signal St corresponding to the test pattern data Dt generated by the pattern generator 104 based on the delay clock CKd supplied from the timing generator 102. Then, the waveform shaper 106 supplies the address signal ADRS supplied from the pattern generator 104 and the generated test pattern signal St to the DUT 200 via the write driver 108.
- the pattern generator 104 generates in advance expected value data Dexp that is output data that the DUT 200 should output in accordance with the address signal ADRS and the test pattern signal St, and supplies the expected value data Dexp to the logic comparison unit 112.
- the comparator 110 reads the cell data Do corresponding to the address signal ADRS from the DUT 200 and outputs it to the logic comparison unit 112.
- the logical comparison unit 112 compares the data Do read from the DUT 200 with the expected value data Dexp supplied from the pattern generator 104 to determine whether the DUT 200 is good or bad.
- the test apparatus 100 changes the address signal ADRS generated in the pattern generator 104 based on a predetermined rule in order to efficiently test cells with various addresses in a state close to actual use.
- the pattern generator 104 performs bit inversion of the generated address signal ADRS, and accesses the memory using the inverted address signal ADRS ′.
- the pattern generator 104 is provided with an address signal inversion circuit for inverting the bits of the address signal ADRS.
- FIG. 2 is a block diagram showing a configuration of the pattern generator 104 having an address inversion function.
- the pattern generator 104 includes an address signal generation circuit 10, an inversion prohibition signal generation unit 12, a selector 14, and an address signal inversion circuit 16.
- each element described as a functional block for performing various processes can be configured by a CPU, a memory, and other LSIs in terms of hardware, and a program loaded in the memory in terms of software. Etc. Therefore, it is understood by those skilled in the art that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof, and is not limited to any one.
- the address signal generation circuit 10 generates an address signal ADRS_IN indicating the address of the memory access destination.
- the bit width of address signal ADRS_IN is 24 bits, for example.
- the inversion prohibition signal generation unit 12 generates a plurality of inversion prohibition signals having the same bit width (24 bits) as the address signal ADRS_IN and prohibiting inversion of each bit of the address signal ADRS_IN.
- five inversion prohibiting signals INH1 [23: 0] to INH5 [23: 0] are generated.
- the upper i-th bit of the inversion prohibition signal is 1 (asserted)
- inversion of the upper i-th bit of the corresponding address signal ADRS_IN is prohibited, and when it is 0 (negation), inversion is permitted.
- the inversion prohibition signal generation unit 12 can be composed of a plurality of registers REG1 to REG5 that store a plurality of patterns of inversion prohibition signals INH1 to INH5, respectively.
- the test apparatus 100 gives the inversion inhibition signals INH1 to INH5 generated according to the pattern program to the registers REG1 to REG5.
- the selector 14 selects and outputs one of a plurality of patterns of the inversion prohibition signals INH1 to INH5 generated by the inversion prohibition signal generation unit 12.
- the selector 14 receives a selection signal SELECT generated according to the pattern program, and the selector 14 selects any one of the inversion inhibition signals INH1 to INH5 according to the selection signal SELECT.
- the address signal inversion circuit 16 receives the address signal ADRS_IN, the inversion control signal INVERT instructing inversion of the address signal ADRS_IN, and the inversion inhibition signal INH selected by the selector 14.
- the inversion control signal INVERT is 1 (asserted)
- the address signal ADRS_IN is inverted, and when it is 0 (negated), the address signal ADRS_IN is output without being inverted.
- the address signal inversion circuit 16 When the inversion control signal INVERT is asserted, the address signal inversion circuit 16 inverts only the bits that are not inhibited by the inversion inhibition signal INH among the bits of the address signal ADRS_IN, in other words, inverts only the permitted bits. To do.
- the address signal inversion circuit 16 includes an AND gate 18 and an XOR gate 20.
- One input terminal of the AND gate 18 is inversion logic, and the inversion inhibition signal INH selected by the selector 14 is input to the inversion input.
- the AND gate 18 generates a logical product of a signal corresponding to the inversion inhibition signal INH and the inversion control signal INVERT.
- the XOR gate 20 receives the signal output from the AND gate 18 and the address signal ADRS_IN, and generates an exclusive OR of corresponding bits of the two signals.
- the value of the select signal SELECT generated according to the pattern program may be set according to the burst length at the time of burst transfer of memory access. That is, the selector 14 selects one of the plurality of inversion prohibiting signals INH1 to INH5 according to the burst length. For example, when the burst length is 2, since the burst address changes only in the least significant bit (LSB), it is desirable to prohibit inversion of only the least significant bit. Therefore, the selector 14 only needs to select the inversion inhibition signal INH in which only the least significant bit is 1 and the remaining bits are 0. When the burst length is 4, the inversion inhibition signal INH in which 2 bits from the least significant bit are 1 and the remaining bits are 0 may be selected.
- the bit that should be prohibited from inversion is 1 and the other bits are 0 in each of a plurality of assumed burst lengths.
- some of the inversion prohibition signals INH1 to INH5 may be used as generation rules for performing address conversion. For example, if the inversion prohibition signal is set to 1, 0, 1, 0... Every other bit, or if the upper number bits are set to 0 and the lower number bits are set to 1, one address signal ADRS_IN A plurality of address signals ADRS_OUT can be easily generated.
- the above is the overall configuration of the test apparatus 100. Next, an example of the operation will be described.
- the address signal ADRS_IN is sequentially generated according to the same pattern program in a state where the inversion control signal INVERT is asserted.
- an address signal ADRS_OUT in which the bits permitted by the inversion prohibition signal INH among the bits of the address signal ADRS_IN are inverted is generated.
- the test apparatus 100 executes memory access based on the converted address signal ADRS_OUT.
- the test apparatus 100 When testing the DUT 200 in a burst transfer state, the test apparatus 100 changes the burst length according to the pattern program, and changes the select signal SELECT accordingly. As a result, the inversion prohibition signal set according to the burst length is selected, and only the necessary bits of the address signal ADRS_IN can be inverted at the necessary timing.
- the test apparatus 100 among the bits of the address signal, by preparing a plurality of patterns of inversion prohibiting signals that specify the bits that permit inversion and the bits that are to be prohibited, by selecting one of them. Only the necessary bits can be inverted when necessary according to the operation of the memory being the device under test.
- test apparatus 100 since the test apparatus 100 according to the embodiment is configured to select one of a plurality of pattern inversion prohibiting signals, it is only necessary to generate an appropriate select signal SELECT according to the pattern program. It can be simplified.
- the present invention is not limited to the inverting process, and the arithmetic process is performed on each bit of the address signal or the data signal.
- the pattern generator may be equipped with an address conversion circuit for converting a logical address into a physical address, or for scrambling / descrambling the address based on a predetermined rule.
- a conversion prohibition signal generation unit that generates a conversion prohibition signal that prohibits address conversion for each bit may be provided to control conversion and non-conversion of each bit of the address signal based on the conversion prohibition signal. .
- the pattern generator includes an address signal generation circuit (10), an operation prohibition signal generation unit (12), a selector (14), and an address signal operation circuit (16).
- An address signal generation circuit (10) generates an address signal ADRS_IN indicating an address of an access destination of the memory.
- the operation prohibition signal generation unit (12) generates a plurality of patterns of operation prohibition signals (INH) having the same bit width as the address signal ADRS_IN and prohibiting operation processing on each bit of the address signal.
- the selector (14) selects and outputs one of a plurality of patterns of operation inhibition signals (INH1 to INH5) generated by the operation inhibition signal generation unit (12).
- the address signal arithmetic circuit (16) receives the address signal ADRS_IN, an arithmetic control signal (INVERT) for instructing arithmetic processing for the address signal, and an arithmetic prohibition signal (INH) selected by the selector (14).
- the arithmetic control signal (INVERT) is asserted, the address arithmetic circuit 16 performs arithmetic processing only on bits that are not prohibited by the arithmetic prohibition signal (INH) among the bits of the address signal ADRS_IN and outputs the result.
- the test apparatus 100 may include a pattern generator 104 configured by replacing the address signal generation circuit 10 of FIG. 2 with a data signal generation circuit that generates a data signal to be written into the memory.
- the pattern generator 104 different patterns are set for the inversion inhibition signals INH1 to INH5.
- the signal inversion mechanism (signal conversion mechanism) according to the embodiment for the inversion of the data signal or other arithmetic processing, the following effects can be obtained.
- the data signal generation circuit generates a data signal according to the pattern program, and this data signal is used with an inversion inhibition signal of a different pattern.
- a plurality of data signals can be generated from one data signal, and the memory can be tested under various conditions.
- the present invention can be used for a semiconductor test apparatus.
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Abstract
Description
バースト長に応じて演算処理を許可するビットの位置を変化させることにより、適切なアドレスにアクセスすることが可能となる。
たとえば反転禁止信号INH1~INH5のいくつかに、データ信号の変換規則を格納しておけば、データ信号生成回路がパターンプログラムに従ってデータ信号を生成し、このデータ信号を異なるパターンの反転禁止信号を用いて反転することにより、ひとつのデータ信号から複数のデータ信号を生成することができ、メモリをさまざまな条件で試験することができる。
Claims (9)
- メモリの試験装置に搭載されるパターン発生器であって、
前記メモリのアクセス先のアドレスを示すアドレス信号を生成するアドレス信号発生回路と、
前記アドレス信号と同じビット幅を有し、前記アドレス信号の各ビットに対する演算処理を禁止する演算禁止信号を、複数のパターン生成する演算禁止信号生成部と、
前記演算禁止信号生成部により生成される複数パターンの演算禁止信号から、いずれかを選択して出力するセレクタと、
前記アドレス信号と、前記アドレス信号に対する演算処理を指示する演算制御信号と、前記セレクタにより選択された前記演算禁止信号と、を受け、前記演算制御信号がアサートされると、前記アドレス信号の各ビットの内、前記演算禁止信号によって演算処理が禁止されないビットのみに演算処理を施して出力するアドレス信号演算回路と、
を備えることを特徴とするパターン発生器。 - 前記セレクタは、前記メモリのバースト転送時のバースト長に応じて、いずれかの演算禁止信号を選択することを特徴とする請求項1に記載のパターン発生器。
- 前記アドレス信号演算回路による前記演算処理は、前記アドレス信号の反転処理であることを特徴とする請求項1または2に記載のパターン発生器。
- 前記アドレス信号演算回路は、
前記セレクタにより選択された前記演算禁止信号に応じた信号と前記演算制御信号の論理積を生成するANDゲートと、
前記ANDゲートから出力される信号と前記アドレス信号の、対応するビット同士の排他的論理和を生成するXORゲートと、
を含むことを特徴とする請求項3に記載のパターン発生器。 - 前記演算禁止信号生成部は、複数のパターンの前記演算禁止信号をそれぞれ格納する複数のレジスタを含むことを特徴とする請求項1から4のいずれかに記載のパターン発生器。
- メモリの試験装置に搭載されるパターン発生器であって、
前記メモリに書き込まれるデータ信号を生成するデータ信号発生回路と、
前記データ信号と同じビット幅を有し、前記データ信号の各ビットに対する演算処理を禁止する演算禁止信号を、複数のパターン生成する演算禁止信号生成部と、
前記演算禁止信号生成部により生成される複数パターンの演算禁止信号から、いずれかを選択して出力するセレクタと、
前記データ信号と、前記データ信号に対する演算処理を指示する演算制御信号と、前記セレクタにより選択された前記演算禁止信号と、を受け、前記演算制御信号がアサートされると、前記データ信号の各ビットの内、前記演算禁止信号によって演算処理が禁止されないビットのみに演算処理を施して出力するデータ信号演算回路と、
を備えることを特徴とするパターン発生器。 - 前記データ信号演算回路による前記演算処理は、前記データ信号の反転処理であることを特徴とする請求項6に記載のパターン発生器。
- 前記データ信号演算回路は、
前記セレクタにより選択された前記演算禁止信号に応じた信号と前記演算制御信号の論理積を生成するANDゲートと、
前記ANDゲートから出力される信号と前記データ信号の、対応するビット同士の排他的論理和を生成するXORゲートと、
を含むことを特徴とする請求項7に記載のパターン発生器。 - 前記演算禁止信号生成部は、複数のパターンの前記演算禁止信号をそれぞれ格納する複数のレジスタを含むことを特徴とする請求項6から8のいずれかに記載のパターン発生器。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US12/991,830 US8423840B2 (en) | 2008-05-21 | 2008-05-21 | Pattern generator |
PCT/JP2008/001274 WO2009141849A1 (ja) | 2008-05-21 | 2008-05-21 | パターン発生器 |
JP2010512848A JP4722226B2 (ja) | 2008-05-21 | 2008-05-21 | パターン発生器 |
KR1020107028627A KR101196492B1 (ko) | 2008-05-21 | 2008-05-21 | 패턴 발생기 |
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PCT/JP2008/001274 WO2009141849A1 (ja) | 2008-05-21 | 2008-05-21 | パターン発生器 |
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JP (1) | JP4722226B2 (ja) |
KR (1) | KR101196492B1 (ja) |
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Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5947265B2 (ja) * | 1978-10-30 | 1984-11-17 | タケダ理研工業株式会社 | パタ−ン発生装置 |
JPS6018948B2 (ja) * | 1978-05-18 | 1985-05-13 | 日本電信電話株式会社 | 試験パタ−ン発生器 |
JPH0511024A (ja) * | 1991-07-02 | 1993-01-19 | Nec Corp | Icテスタのデータ発生方式 |
JPH05128014A (ja) * | 1991-10-31 | 1993-05-25 | Advantest Corp | メモリ試験装置 |
JPH095402A (ja) * | 1995-06-22 | 1997-01-10 | Advantest Corp | 半導体メモリ試験装置 |
JP2915945B2 (ja) * | 1990-01-12 | 1999-07-05 | 株式会社アドバンテスト | メモリ試験装置 |
JP3271307B2 (ja) * | 1992-06-26 | 2002-04-02 | 安藤電気株式会社 | 半導体メモリ用試験パターン発生器 |
JP3937034B2 (ja) * | 2000-12-13 | 2007-06-27 | 株式会社日立製作所 | 半導体集積回路のテスト方法及びテストパターン発生回路 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2531444A1 (fr) | 1982-08-06 | 1984-02-10 | Coatex Sa | Agent de broyage a base de polymeres et/ou copolymeres acryliques pour suspension aqueuse de materiaux mineraux grossiers en vue d'applications pigmentaires |
JPS6018948A (ja) | 1983-07-12 | 1985-01-31 | Nec Corp | 半導体集積回路装置 |
JPS63166100A (ja) * | 1986-12-26 | 1988-07-09 | Hitachi Electronics Eng Co Ltd | アドレス変換方式 |
JPH0737892B2 (ja) * | 1988-01-12 | 1995-04-26 | 大日本スクリーン製造株式会社 | パターン欠陥検査方法 |
JPH03271307A (ja) * | 1990-03-20 | 1991-12-03 | Nisshin Steel Co Ltd | 高炉炉内ガス流分布の連続測定方法 |
JP3269117B2 (ja) * | 1992-05-26 | 2002-03-25 | 安藤電気株式会社 | 半導体メモリ用試験パターン発生器 |
JPH07191099A (ja) * | 1993-12-27 | 1995-07-28 | Hitachi Electron Eng Co Ltd | Ic検査装置 |
FR2716743B1 (fr) * | 1994-02-28 | 1996-09-27 | Sgs Thomson Microelectronics | Circuit de redondance de mémoire. |
JPH0982100A (ja) * | 1995-09-14 | 1997-03-28 | Advantest Corp | 半導体試験装置のテストパターン発生装置 |
JPH1092194A (ja) * | 1996-09-17 | 1998-04-10 | Oki Electric Ind Co Ltd | メモリテスト回路 |
JP3871384B2 (ja) * | 1996-11-01 | 2007-01-24 | 株式会社アドバンテスト | 半導体メモリ試験装置用不良解析メモリ |
JPH10223000A (ja) * | 1997-02-04 | 1998-08-21 | Mitsubishi Electric Corp | 半導体記憶装置 |
TW382657B (en) * | 1997-06-13 | 2000-02-21 | Advantest Corp | Memory tester |
JP4121634B2 (ja) * | 1998-09-21 | 2008-07-23 | 株式会社アドバンテスト | メモリ試験装置 |
JP4102493B2 (ja) | 1998-10-21 | 2008-06-18 | 株式会社アドバンテスト | 半導体試験装置 |
JP4234863B2 (ja) * | 1998-12-11 | 2009-03-04 | 株式会社アドバンテスト | フェイル情報取り込み装置、半導体メモリ試験装置及び半導体メモリ解析方法 |
JP4601119B2 (ja) * | 2000-05-02 | 2010-12-22 | 株式会社アドバンテスト | メモリ試験方法・メモリ試験装置 |
JP2003186939A (ja) * | 2001-12-19 | 2003-07-04 | Canon Inc | Lsiの論理検証における記憶素子の検証方法 |
JP4644124B2 (ja) | 2003-06-19 | 2011-03-02 | 株式会社アドバンテスト | 試験装置 |
-
2008
- 2008-05-21 KR KR1020107028627A patent/KR101196492B1/ko active IP Right Grant
- 2008-05-21 JP JP2010512848A patent/JP4722226B2/ja not_active Expired - Fee Related
- 2008-05-21 WO PCT/JP2008/001274 patent/WO2009141849A1/ja active Application Filing
- 2008-05-21 US US12/991,830 patent/US8423840B2/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6018948B2 (ja) * | 1978-05-18 | 1985-05-13 | 日本電信電話株式会社 | 試験パタ−ン発生器 |
JPS5947265B2 (ja) * | 1978-10-30 | 1984-11-17 | タケダ理研工業株式会社 | パタ−ン発生装置 |
JP2915945B2 (ja) * | 1990-01-12 | 1999-07-05 | 株式会社アドバンテスト | メモリ試験装置 |
JPH0511024A (ja) * | 1991-07-02 | 1993-01-19 | Nec Corp | Icテスタのデータ発生方式 |
JPH05128014A (ja) * | 1991-10-31 | 1993-05-25 | Advantest Corp | メモリ試験装置 |
JP3271307B2 (ja) * | 1992-06-26 | 2002-04-02 | 安藤電気株式会社 | 半導体メモリ用試験パターン発生器 |
JPH095402A (ja) * | 1995-06-22 | 1997-01-10 | Advantest Corp | 半導体メモリ試験装置 |
JP3937034B2 (ja) * | 2000-12-13 | 2007-06-27 | 株式会社日立製作所 | 半導体集積回路のテスト方法及びテストパターン発生回路 |
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JPWO2009141849A1 (ja) | 2011-09-22 |
KR101196492B1 (ko) | 2012-11-01 |
KR20110020843A (ko) | 2011-03-03 |
US20110119537A1 (en) | 2011-05-19 |
JP4722226B2 (ja) | 2011-07-13 |
US8423840B2 (en) | 2013-04-16 |
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