WO2007004289A1 - テスト用回路、ウェハ、測定装置、デバイス製造方法、及び表示装置 - Google Patents
テスト用回路、ウェハ、測定装置、デバイス製造方法、及び表示装置 Download PDFInfo
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- WO2007004289A1 WO2007004289A1 PCT/JP2005/012359 JP2005012359W WO2007004289A1 WO 2007004289 A1 WO2007004289 A1 WO 2007004289A1 JP 2005012359 W JP2005012359 W JP 2005012359W WO 2007004289 A1 WO2007004289 A1 WO 2007004289A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/27—Testing of devices without physical removal from the circuit of which they form part, e.g. compensating for effects surrounding elements
- G01R31/275—Testing of devices without physical removal from the circuit of which they form part, e.g. compensating for effects surrounding elements for testing individual semiconductor components within integrated circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2884—Testing of integrated circuits [IC] using dedicated test connectors, test elements or test circuits on the IC under test
Definitions
- Test circuit wafer, measuring device, device manufacturing method, and display device
- the present invention relates to a wafer on which a plurality of electronic devices such as semiconductor circuits are formed, a measuring apparatus for measuring the electrical characteristics of the wafer, and the selection of the electronic devices according to variations in the electrical characteristics of the wafer.
- the present invention relates to a device manufacturing method and a display device that displays variations in the electrical characteristics.
- the present invention relates to a wafer provided with a test circuit such as TEG (Test Element Group).
- a method for measuring device variations a method of providing a plurality of TEGs on a wafer on which a plurality of semiconductor circuits are formed and evaluating the characteristics of a plurality of single elements included in each TEG is known.
- the single element included in the TEG is formed by the same process as the element used during actual operation of the circuit, and the characteristics of the actual operating element are determined based on the variations in the characteristics of the single element included in the TEG. Estimate variation.
- the conventional TEG does not have dozens of single elements of the same process and the same device size included in the TEG, and the characteristics of many elements are measured. It was impossible to accurately evaluate the fluctuation of characteristics. For this reason, in conventional device design, it is necessary to perform design (worst case design) that takes into account the tolerance of variation. As a result, there is a problem that the area efficiency of the element is deteriorated and the manufacturing cost of the circuit is increased. Further, in recent semiconductor elements that are becoming finer, there is a case where a circuit cannot be designed by such worst case design.
- the conventional TEG cannot identify the cause of failure that occurs locally in the actual operation circuit. For this reason, it is necessary to identify a defect that occurs locally by evaluating an actual operating circuit after performing the entire manufacturing process, which requires a great deal of cost and time.
- an object of the present invention is to provide a UENO, a measuring device, a device manufacturing method, and a display device that can solve the above-described problems. This object is achieved by a combination of features described in the independent claims. Further, the dependent claims define further advantageous specific examples of the present invention.
- a wafer on which a plurality of electronic devices and a test circuit are formed the test circuits are provided electrically in parallel.
- a wafer having a plurality of transistors to be measured, a selection unit that sequentially selects each of the transistors to be measured, and an output unit that sequentially outputs the source voltages of the transistors to be measured selected by the selection unit.
- a test circuit is provided corresponding to a plurality of transistors under measurement, and corresponds to a plurality of current sources that define source-drain currents of the corresponding transistors under measurement, and a plurality of transistors under measurement. And a plurality of gate voltage control units that apply predetermined gate voltages to the gate terminals of the corresponding measured transistors, respectively, and the output unit is a source of the measured transistor that is sequentially selected by the selection unit. The voltage may be output sequentially.
- the plurality of transistors under measurement are arranged in a row direction and a column direction orthogonal to each other in the plane of the wafer. Are arranged in parallel with each other, and the selection unit includes a row direction selection unit that selects the position of the transistor under measurement in the row direction and a column direction selection unit that selects the position of the transistor under measurement in the column direction. And have.
- Each of the row direction selection unit and the column direction selection unit may include a circuit such as a decoder or a shift register that converts a given selection signal into a position signal indicating the position of the transistor under measurement.
- a test circuit is provided corresponding to a plurality of transistors under measurement, a plurality of column direction selection transistors that receive the source voltage of the corresponding transistor under measurement at the drain terminal, and a position in the row direction where the transistors under measurement are provided.
- a plurality of row direction selection transistors for selecting whether or not to supply the source voltage of the column direction selection transistor provided at each position in the row direction to the characteristic measurement unit.
- the unit sequentially controls a plurality of column direction selection transistors to be turned on for each position in the column direction, and the row direction selection unit sequentially controls the plurality of row direction selection transistors to be turned on.
- the current source may be provided in common to a plurality of transistors under measurement provided at substantially the same position in the row direction.
- the plurality of transistors to be measured may be formed with a predetermined process rule and device size for each position in the row direction.
- Each gate voltage control unit of the test circuit has a switch transistor having a PN junction connected to the gate terminal of the measured transistor, and the switch transistor is a gate that turns on the measured transistor.
- the voltage and the gate voltage that turns off the transistor under measurement may be sequentially stamped on the transistor under measurement.
- the test circuit may be provided at a boundary between the semiconductor circuits.
- a plurality of test circuits may be provided corresponding to the plurality of semiconductor circuits, and each test circuit may be provided inside the corresponding semiconductor circuit. Further, only a plurality of test circuits may be provided in the woofer.
- a measuring apparatus for measuring electrical characteristics in the wafer of the first aspect described above, wherein a corresponding transistor under measurement is turned on for each gate voltage control unit. Based on the gate controller that applies the gate voltage to be controlled to the gate terminal of the corresponding transistor under measurement, the gate voltage of each transistor under measurement, and the source voltage output from the output unit, respectively. And a characteristic measuring unit that calculates a threshold voltage of the measured transistor. [0018]
- the measurement apparatus further includes a current control unit that generates substantially the same source-drain current in each current source, and the characteristic measurement unit calculates a fluctuation in threshold voltage of each measured transistor. Good.
- the measurement apparatus further includes a current control unit that sequentially changes a source-drain current generated by each current source, and the characteristic measurement unit sequentially changes the current control unit for each transistor under measurement.
- the source voltage may be measured for each source-drain current to be generated, and the current-voltage characteristics of each measured transistor may be calculated.
- a measuring apparatus for measuring electrical characteristics of a wafer relating to the first aspect, wherein a transistor to be measured corresponding to each switch transistor is turned on.
- a gate controller that sequentially applies a gate voltage and a gate voltage that turns off the transistor under measurement to the transistor under measurement, and a source voltage when the transistor is on and an on-state for each transistor under measurement.
- a measurement device is provided that includes a characteristic measurement unit that measures a source voltage after a predetermined time has passed after switching from a state to an off state, and calculates a leakage current at the PN junction based on the change in the source voltage.
- a wafer on which a plurality of electronic devices and a test circuit are formed the test circuit being electrically connected to a plurality of measured transistors provided in parallel.
- a plurality of transistors under measurement provided with a plurality of gate voltage controllers for applying a predetermined gate voltage to the gate terminals of the corresponding transistors under measurement, and provided in correspondence with the plurality of transistors under measurement,
- a plurality of voltage applying sections for applying a voltage to the source terminal and drain terminal of the corresponding transistor under measurement and controlling the voltage applied to the gate insulating film of the transistor under measurement substantially constant; and a plurality of transistors under measurement;
- the corresponding integrated capacitance for integrating the gate leakage current output from the source terminal and drain terminal force of the corresponding transistor under measurement and the respective measured Providing a wafer having a selector for sequentially selecting a constant transistors, and an output unit for outputting the voltage of the integral capacity corresponding to the transistors under measurement selection unit sequentially select
- the test circuit includes a stress applying unit that applies an electrical stress to the gate insulating film of each transistor to be measured, and the test circuit after the stress applying unit applies the electrical stress.
- a switch part for electrically connecting the source and drain terminals of the transistor and the integration capacitor;
- the voltage application unit is given a gate voltage corresponding to the voltage to be applied to the source terminal and drain terminal of the transistor under measurement, and the source terminal is connected to the source terminal and drain terminal of the transistor under measurement via the switch unit.
- An NMOS transistor having a drain terminal connected to the integration capacitor and a gate voltage corresponding to a voltage to be applied to the source terminal and the drain terminal of the transistor under measurement are provided, and the drain terminal is connected to the integration capacitor.
- a PMOS transistor connected to a source terminal and a drain terminal of the transistor under measurement via the switch unit, and having a source terminal connected to the integration capacitor;
- the switch unit connects the first switch that switches whether the source terminal and the drain terminal of the transistor under measurement are connected to the stress application unit, and whether the source terminal and the drain terminal of the transistor under test are connected to the integration capacitor. And a second switch for switching between
- a measuring apparatus for measuring characteristics of a wafer according to the fourth aspect, wherein a predetermined gate voltage is applied to a gate terminal of a transistor under measurement to a gate voltage control unit. And a control unit that causes the voltage application unit to control the electric field applied to the gate insulating film of the transistor under measurement to be substantially constant, and a change amount of the voltage output by the output unit during a predetermined period.
- a measuring device including a characteristic measuring unit that calculates a gate leakage current of a transistor under measurement.
- the control unit causes the gate voltage control unit to sequentially apply a gate voltage of approximately OV and a gate voltage having a positive or negative voltage value to the transistor under measurement, and the characteristic measurement unit is selected by the selection unit.
- the gate voltage of approximately OV applied to the measured transistor the first current value of the background current is calculated based on the amount of change in the voltage output by the output section during the predetermined period.
- the second current which is the sum of the background current and the gate leakage current, is applied based on the amount of change in the voltage output by the output section during a predetermined period in the state where the positive or negative gate voltage is applied to tl. And calculate the current value of the gate leakage current of the transistor under measurement based on the difference between the first current value and the second current value. It's okay.
- a device manufacturing method for forming a plurality of electronic devices on a wafer, the step of forming a plurality of electronic devices on the wafer, and a plurality of tests on the wafer. Based on the step of forming the test circuit, the step of measuring the electrical characteristics of the plurality of test circuits, the position where the plurality of test circuits are provided, and the electrical characteristics of each test circuit. And determining the quality of each electronic device.
- the step of forming the test circuit includes a step of forming a plurality of transistors to be measured electrically arranged in parallel for each of the test circuits and a selection of sequentially selecting each of the transistors to be measured.
- the step of forming the test circuit is provided corresponding to the plurality of transistors under measurement, and each of the plurality of current sources defining the source-drain current of the corresponding transistor under measurement is used for each test.
- a plurality of gate voltage control units that are provided corresponding to the plurality of transistors to be measured and apply a predetermined gate voltage to the gate terminals of the corresponding transistors to be measured. And further forming a step for each test circuit.
- the step of measuring the electrical characteristics includes the step of sequentially outputting the source voltage of the transistor under measurement selected by the selection unit sequentially to the output unit for each test circuit, and the circuit for each test.
- each gate voltage control unit applies a gate voltage for controlling the corresponding transistor under measurement to the gate terminal of the corresponding transistor under measurement. Calculating a threshold voltage of each transistor under measurement based on the gate voltage of each transistor under measurement and each source voltage output from the output unit.
- the step of forming the test circuit includes a step of forming a plurality of transistors to be measured provided in parallel with each other for each test circuit and a plurality of transistors to be measured.
- a predetermined gate is connected to the gate terminal of the corresponding transistor under measurement.
- a plurality of gate voltage control units for applying a voltage to the test circuit and a plurality of transistors to be measured, and a voltage is applied to the source terminal and the drain terminal of the corresponding transistor to be measured. And applying a plurality of voltage application portions for controlling the voltage applied to the gate insulating film of the transistor under measurement to be substantially constant for each test circuit, and corresponding to the plurality of transistors under measurement.
- a plurality of integration capacitors that integrate the gate leakage currents that are provided and that correspond to the source and drain terminal outputs of the corresponding transistors under test are connected to each test circuit!
- the step of forming the step and the selection unit for sequentially selecting each measured transistor are formed for each test circuit, and the integration capacitance corresponding to the measured transistor to be sequentially selected by the selection unit. Forming an output section for sequentially outputting voltages for each test circuit;
- the gate voltage control unit applies a predetermined gate voltage to the gate terminal of the transistor under measurement, and the voltage application unit applies the target voltage.
- a display device for displaying fluctuations in threshold voltages of a plurality of transistors under measurement provided on a wafer, wherein the measurement is performed for measuring the threshold voltages of the respective transistors under measurement.
- a storage unit for storing the device, the threshold voltage of the measured transistor measured by the measuring device, and the position of each measured transistor in the wafer surface, and a display surface corresponding to the wafer surface.
- a display device is provided that includes a display unit that displays characteristic information corresponding to the voltage value of the threshold voltage of each transistor under measurement at coordinates corresponding to the position of each transistor under measurement.
- the display unit may display characteristic information having brightness according to the voltage value of each threshold voltage on the coordinates of the display surface corresponding to each transistor to be measured.
- the display unit displays characteristic information having a hue corresponding to the current value of each leakage current at the coordinates of the display surface corresponding to each transistor under measurement.
- a measuring device a storage unit that stores the leakage current of the transistor under measurement measured by the measuring unit, and the position of each transistor under measurement in the wafer surface, and a display corresponding to the surface of the wafer
- a display device comprising a display unit for displaying characteristic information corresponding to a current value of a leakage current of each transistor under measurement on a surface at coordinates corresponding to the position of each transistor under measurement.
- variations in threshold voltage, current-voltage characteristics, and leakage current in a large number of transistors to be measured provided on the wafer surface can be measured with high accuracy and in a short time.
- the distribution of the characteristic variation in the wafer surface can be displayed, and the defect location can be easily identified and the cause analyzed.
- FIG. 1 is a diagram showing a configuration of a measuring apparatus 100 according to an embodiment of the present invention.
- FIG. 2 is a diagram showing an example of the surface of a wafer 500.
- FIG. 3 is a diagram showing an example of a circuit layout of a test circuit 300.
- FIG. 4 is a diagram showing an example of a circuit configuration in a region 330.
- FIG. 5 is a flowchart showing an example of the operation of the measuring apparatus 100 when measuring the threshold voltage of each transistor under measurement 314.
- FIG. 6 is a diagram showing an example of variation in threshold voltage of a transistor under measurement 314.
- FIG. 7 is a diagram showing variations in threshold voltage displayed on the display unit of the display device 18.
- FIG. 8 is a flowchart showing an example of the operation of the measuring apparatus 100 when measuring the current-voltage characteristics of each transistor under measurement 314.
- FIG. 9 is a flowchart showing an example of the operation of the measuring apparatus 100 when measuring the PN junction leakage current of each cell 310.
- FIG. 10 One circuit configuration of one cell 310 arranged in the gate leakage current measurement region 370 It is a figure which shows an example.
- FIG. 11 is a flowchart showing an example of the operation of the measuring apparatus 100 when measuring the gate leakage current of the transistor under measurement 372.
- FIG. 12 is a diagram showing another example of the circuit configuration in the gate leakage current measurement region 370.
- FIG. 13 is a diagram showing variations in gate leakage current displayed on the display unit of the display device 18.
- FIG. 14 is a flowchart showing an example of a device manufacturing method for forming a plurality of electronic devices 510 on a wafer 500.
- FIG. 1 is a diagram showing a configuration of a measuring apparatus 100 according to an embodiment of the present invention.
- the measuring apparatus 100 is an apparatus for measuring electrical characteristics of a wafer 500 on which a plurality of electronic devices are formed, and includes a test head 10, an ADC 12, a control unit 14, a characteristic measuring unit 16, and a display device 18.
- the test head 10 is electrically connected to a test circuit provided on the wafer 500, and exchanges signals with the test circuit.
- the control unit 14 controls a test circuit for the wafer 500 via the test head 10.
- the ADC 12 converts the signals output from the Ueno and 500 test circuits via the test head 10 into digital data.
- the characteristic measurement unit 16 measures the electrical characteristics of the test circuit on the wafer 500 based on the digital data output from the ADC 12. For example, the characteristic measurement unit 16 measures the threshold voltage, current-voltage characteristic, leakage current, etc. of each transistor under test included in the test circuit.
- the display device 18 displays the electrical characteristics of each transistor under test. For example, the display device 18 displays the characteristic information corresponding to the voltage value of the threshold voltage of each transistor under test on the display surface of the display device 18 at the coordinates corresponding to each transistor under test.
- FIG. 2 is a view showing an example of the surface of the wafer 500.
- a plurality of electronic devices 510 and a test circuit 300 are formed on the surface of the wafer 500.
- the electronic device 510 is a device to be shipped as an actual operation device.
- the test circuit 300 may be provided inside the electronic device 510 for each electronic device 510. In another example, only a plurality of test circuits 300 may be formed on the surface of the wafer 500. In yet another example, as shown in FIG. 2, it may be provided at the boundary of each electronic device 510.
- FIG. 3 is a diagram illustrating an example of a circuit layout of the test circuit 300.
- the test circuit 300 includes a region 330 where a plurality of transistors to be measured formed with the same or a plurality of process rules and device sizes are provided, and a gate leakage current measurement region 370.
- the area 330 is divided into a plurality of parts in the horizontal direction, and the measured transistors are formed with different process rules and device sizes for each divided area. .
- FIG. 4 is a diagram illustrating an example of a circuit configuration in the region 330.
- the test circuit 300 includes a row direction selection unit 302, a column direction selection unit 304, a plurality of row direction selection transistors (306-1, 306-2, hereinafter collectively referred to as 306), and a plurality of current sources. (318-1, 318-2, hereinafter collectively referred to as 318), an output unit 320, and a plurality of cells (310-1 to 310-4, hereinafter collectively referred to as 310).
- Row direction select transistor 306 and current source 318 are It is provided for every 310 groups of cells provided along the direction.
- the plurality of cells 310 are provided in parallel along the row direction and the column direction forming a matrix of a matrix within the plane of the wafer 500.
- a larger number of cells 310 can be provided in the power running direction and the column direction, which shows a circuit in which two cells 310 are provided in the row direction and the column direction.
- the plurality of cells 310 are provided over the plurality of divided regions described in FIG. For example, each divided region has cells 310 of 128 columns in the row direction and 512 rows in the column direction. In this case, the process rules and device sizes of the elements included in the cell 310 are different for each divided region.
- Each cell 310 includes a measured transistor 314, a switch transistor 312, and a column direction selection transistor 316.
- the transistor of each cell 310 may be a MOS transistor formed by the same process as the actual operation transistor included in the electronic device 510.
- the transistor under measurement 314 of each cell 310 is provided electrically in parallel with each other.
- a predetermined voltage V is applied to the source terminal of each transistor under measurement 314.
- the terminal of the transistor under test 314 that supplies the well voltage is not shown, but the terminal of the transistor under test 314 can be connected to the ground potential so that the well voltage can be controlled independently for each transistor.
- the voltage terminal and the source terminal may be connected.
- the transistor under measurement 314 may be either an NMOS transistor or a PMOS transistor.
- the voltage V, voltage V, voltage ⁇ , and voltage V shown in Fig. 4 are shown in Fig. 1.
- the switch transistor 312 of each cell 310 is provided in correspondence with the measured transistor 314 of each cell, and applies a predetermined gate voltage to the gate terminal of the corresponding measured transistor 314, respectively. Functions as a gate voltage control unit. In this example, a predetermined voltage V is applied to the source terminal of the switch transistor 312, and the gate
- the voltage ⁇ for controlling the operation of the switch transistor 312 is applied to the first terminal, and the source terminal is connected to the gate terminal of the transistor 314 to be measured.
- the switch transistor 312 has a voltage substantially equal to the voltage V when controlled to be turned on by the voltage ⁇ .
- a floating voltage with a voltage of approximately V is applied to the gate terminal of the transistor under measurement 314.
- the voltage ⁇ is applied to all the cells 310—all other examples.
- the voltage ⁇ is A pulse signal may be sequentially applied from the column direction selection unit 304 to each cell 310 aligned in the row direction.
- the column direction selection transistor 316 of each cell 310 is provided corresponding to the transistor under measurement of each cell.
- the source terminal of each column direction selection transistor 316 is connected to the drain terminal of the transistor under measurement 314.
- the drain terminal of the column direction selection transistor 316 is connected to the drain terminal of the corresponding row direction selection transistor 306. That is, the drain terminal of each row direction selection transistor 306 is connected to the drain terminals of the corresponding plurality of column direction selection transistors 316.
- the column direction selection unit 304 includes a plurality of cells 310 provided along the column direction (in this example, cell groups (310-1, 310-2) and cell groups (310-3, 310— 4) Select) in sequence.
- the row direction selection unit 302 includes a plurality of cells 310 provided along the row direction (in this example, the cell groups (310-1, 310-3) and the cell groups (310-2, 310— 4) Select) in sequence. With such a configuration, the column direction selection unit 304 and the row direction selection unit 302 sequentially select the cells 310.
- the column direction selection unit 304 sequentially turns on the column direction selection transistors 316 provided in the cell groups in each column direction for each position in the column direction according to the selection signal supplied from the control unit 14. Control to the state.
- the row direction selection unit 302 sequentially turns on the row direction selection transistors 306 provided corresponding to the cell groups in each row direction for each position in the row direction according to the selection signal provided from the control unit 14. Control.
- the control unit 14 supplies a selection signal for sequentially selecting each cell 310 to the column direction selection unit 304 and the row direction selection unit 302.
- the row direction selection unit 302 and the column direction selection unit 304 may be circuits such as a decoder and a shift register that convert a given selection signal into a position signal indicating the position of the cell 310 to be selected.
- the position signal is a signal for controlling the row direction selection transistor 306 and the column direction selection transistor 316 corresponding to the cell 310 to be selected according to the selection signal to be in an ON state.
- the transistor under measurement 314 provided in each cell 310 is sequentially selected.
- the source voltage of the transistor under measurement 314 that is sequentially selected is sequentially applied to the output unit 320.
- the output unit 320 sequentially outputs the supplied source voltage to the test head 10.
- the output unit 320 is, for example, a voltage follower buffer.
- the measuring device 100 measures the electrical characteristics such as the threshold voltage, current voltage characteristics, low frequency noise, and PN junction leakage current of the transistor under measurement 314 based on the source voltage of each transistor under measurement 314. .
- Each current source 318 is a MOS transistor that receives a predetermined voltage V at its gate terminal.
- each current source 318 is connected to the drain terminals of a corresponding plurality of column direction selection transistors 316. That is, each current source 318 is provided in common to a plurality of transistors under measurement 314 provided at substantially the same position in the row direction, and defines a source-drain current flowing through the corresponding transistor under measurement 314.
- each test circuit 300 a plurality of transistors under measurement 314 are electrically sequentially selected, and source voltages of the selected transistors under measurement 314 are sequentially output. Therefore, the source voltage of each transistor under measurement 314 can be measured at high speed in a short time. Therefore, even when a large number of transistors to be measured 314 are provided on the wafer 500, all the transistors to be measured 314 can be measured in a short time. In this example, about 10,000 to 10 million transistors to be measured 314 may be provided in the plane of the wafer 500. By measuring many transistors to be measured 314, variation in characteristics of the transistors to be measured 314 can be calculated with high accuracy.
- FIG. 5 is a flowchart showing an example of the operation of the measurement apparatus 100 when measuring the threshold voltage of each transistor under measurement 314.
- the control unit 14 supplies the test circuit 300 with the voltages V, V, ⁇ , and V described in FIG. 4 (S)
- control unit 14 supplies a constant voltage V to each current source 318, and each current source 318 is supplied.
- control unit 14 supplies a gate voltage V for controlling the transistor under measurement 314 to be turned on,
- a voltage ⁇ is supplied to control the switch transistor 312 to turn on.
- the control unit 14 functions as a gate control unit that applies a gate voltage for controlling the transistor under measurement 314 to the ON state to the gate terminal of each transistor under measurement 314.
- control unit 14 supplies a selection signal for selecting the transistor under measurement 314 whose threshold voltage is to be measured to the row direction selection unit 302 and the column direction selection unit 304 (S442). Then, the ADC 12 measures the output voltage of the output unit 320 (S444). The ADC 12 may notify the control unit 14 that the output voltage has been measured. The control unit 14 may select the next transistor to be measured 314 when receiving the notification.
- the characteristic measuring unit 16 includes a gate voltage V applied to the transistor under measurement 314,
- the threshold voltage of each measured transistor 314 is calculated (S446).
- the threshold voltage of the measured transistor 314 is, for example, the difference between the gate voltage V and the output voltage, that is, the gate-source voltage of the measured transistor 314.
- control unit 14 determines whether or not the threshold voltage has been measured for all the transistors to be measured 314 (S448). If there is a transistor to be measured 314 that has not yet been measured, The transistor under measurement 314 is selected, and the processing of S444 and S446 is repeated.
- the characteristic measuring unit 16 calculates the variation in the threshold voltage (S450). Then, the display device 18 displays the variation in the threshold voltage calculated by the characteristic measurement unit 16 (S452).
- the threshold voltage variation of the transistor under measurement 314 can be measured for each process rule. Further, by performing measurements on a plurality of test circuits 300 provided on the wafer 500, the distribution of threshold voltage variation on the surface of the wafer 500 can be measured.
- FIG. 6 is a diagram illustrating an example of variation in threshold voltage of the transistor under measurement 314.
- the horizontal axis indicates the threshold voltage
- the vertical axis indicates the frequency at which each threshold voltage appears.
- the threshold voltage distribution is shown for each device size of the transistor 314 to be measured. The measured transistor 314 with different device sizes has different gate lengths, etc. The threshold voltage changes. For this reason, the threshold voltage distribution for each device size has a different peak value.
- the measuring apparatus 100 it is possible to accurately measure variations in the threshold voltage of the transistor under measurement 314 formed with each device size.
- the design margin can be reduced. Therefore, the area efficiency of the actual operation circuit can be improved and the design cost can be reduced.
- test circuit 300 when the test circuit 300 is provided inside each electronic device 510 that is an actual operation circuit, by measuring the variation in the characteristics of the transistor 314 to be measured included in the test circuit 300, the electronic device It is possible to estimate variations in characteristics of the actual operation transistors included in 510. Therefore, the quality of the electronic device 510 can be determined efficiently based on the variation in characteristics of the transistor under measurement 314.
- FIG. 7 is a diagram showing variations in threshold voltage displayed on the display unit of the display device 18.
- the display device 18 includes a storage unit that stores the threshold voltage of each measured transistor 314 measured by the measuring device 100 in association with the position of each measured transistor 314 in the plane of the wafer 500, and a threshold value. And a display portion for displaying voltage variation.
- the storage unit may receive a threshold voltage from the characteristic measurement unit 16 and may receive position information of the transistor under measurement 314 corresponding to the threshold voltage from the control unit 14.
- the control unit 14 may supply a selection signal to be supplied to the test circuit 300 to the storage unit as position information of the transistor 314 to be measured.
- the display unit displays the region 330 described in FIG.
- the display unit has a characteristic corresponding to the voltage value of the threshold voltage of each measured transistor 314 at the coordinates corresponding to the position of each measured transistor 314 on the display surface corresponding to the in-plane of the wafer 500. Display information.
- the characteristic information may display dots having brightness according to the voltage value of each threshold voltage on the coordinates of the display surface corresponding to each transistor under measurement 314. Further, the characteristic information may display dots having hues corresponding to the voltage values of the respective threshold voltages at the coordinates of the display surface corresponding to the respective transistors under measurement 314. As described above, by displaying the variation in the threshold voltage of the transistor under measurement 314 in accordance with the position of each transistor under measurement 314, the distribution of the variation in the threshold voltage on the circuit can be visualized. it can. As a result, row defects and point defects can be easily found.
- FIG. 8 is a flowchart showing an example of the operation of the measurement apparatus 100 when measuring the current-voltage characteristics of the respective transistors under measurement 314.
- the control unit 14 supplies the test circuit 300 with the voltages V, V, ⁇ , and V described in FIG.
- control unit 14 supplies a constant voltage V to each current source 318, and each power source 318 is supplied.
- the current source 318 generates the same constant current. Further, the control unit 14 supplies a gate voltage V for controlling the transistor under measurement 314 to be in an ON state, and each of the switch transistors 31
- control unit 14 supplies a selection signal for selecting the transistor under measurement 314 whose current-voltage characteristics are to be measured to the row direction selection unit 302 and the column direction selection unit 304 (S402). Then, the control unit 14 changes V with a predetermined resolution within a predetermined range (S4
- the ADC 12 outputs the output voltage of the output unit 320 for each V.
- the measuring apparatus 100 sequentially changes the source-drain current generated by the current source 318, and measures the source voltage of the transistor under measurement 314 for each source-drain current. Thereby, the current-voltage characteristic of the transistor under measurement 314 can be measured.
- the characteristic measurement unit 16 calculates the variation in the current-voltage characteristics (S412). For example, the characteristic measuring unit 16 calculates the mutual conductance gm of each current-voltage characteristic and calculates the variation of the mutual conductance gm. In addition, the slope swing and the silicon gate insulating film interface state density are calculated from the current-voltage characteristics in the subthreshold region, and the variation is calculated. And display The device 18 displays the variation in characteristics calculated by the characteristic measurement unit 16 (S414). The operation of the display device 18 is the same as that described with reference to FIG. In FIG. 7, the force displaying the characteristic information according to the voltage value of the threshold voltage The display device 18 in this example displays the characteristic information according to the mutual conductance gm of the current-voltage characteristic. Such an operation makes it possible to easily grasp variations in current-voltage characteristics.
- FIG. 9 is a flowchart showing an example of the operation of the measuring apparatus 100 when measuring the PN junction leakage current of each cell 310.
- Each switch transistor 312 has a PN junction connected to the gate terminal of the corresponding transistor under measurement 314. In this example, the leakage current at the PN junction is measured.
- control unit 14 supplies the test circuit 300 with the voltages V and V described in FIG.
- control unit 14 supplies a constant voltage V to each current source 318 of j REF REF and causes each current source 318 to generate the same constant current.
- control unit 14 supplies a gate voltage V that controls the transistor under measurement 314 to be in an ON state,
- a voltage ⁇ for controlling the switching transistor 312 to be turned on is supplied. Further, by sequentially supplying pulse signals from the column direction selection unit 304 to the cells 310 arranged in the row direction, it is possible to make the leak current measurement times of all the cells the same.
- control unit 14 supplies a selection signal for selecting the transistor under measurement 314 whose PN leakage current is to be measured to the row direction selection unit 302 and the column direction selection unit 304 (S462). Then, the control unit 14 controls the switch transistor 312 corresponding to the selected transistor under measurement 314 to be turned off (S464). In other words, the control unit 14 sends to each transistor for measurement 312 the gate voltage for turning on the corresponding transistor under measurement 314 and the gate voltage for turning off the transistor under measurement 314 to each transistor for measurement 312. Apply sequentially.
- the characteristic measuring unit 16 calculates, for the transistor under measurement 314, a source voltage in an on state and a source voltage after a predetermined time has elapsed since the on state force is switched to an off state. Measure (S466). In this example, the characteristic measurement unit 16 measures the change in the output voltage of the output unit 320 during the predetermined time.
- the characteristic measurement unit 16 determines the leakage current in the PN junction based on the change in the source voltage.
- the flow is calculated (S468).
- the switch transistor 312 When the switch transistor 312 is on, a charge corresponding to the gate voltage is accumulated in the gate capacitance of the transistor under measurement 314. Then, when the switch transistor 312 is switched to the off state, the charge of the gate capacitance is discharged by the leakage current in the PN junction. For this reason, the magnitude of the PN junction leakage current is determined by the amount of change in the source voltage of the transistor under measurement 314 at a predetermined time.
- the characteristic measurement unit 16 calculates the variation in the PN junction leakage current (S472). Then, the display device 18 displays the variation in characteristics calculated by the characteristic measuring unit 16 (S474).
- the operation of the display device 18 is the same as that described with reference to FIG. In FIG. 7, the characteristic information corresponding to the voltage value of the threshold voltage is displayed, but the display device 18 in this example displays the characteristic information corresponding to the current value of the PN junction leakage current. Such an operation makes it possible to easily grasp variations in PN junction leakage current.
- FIG. 10 is a diagram showing an example of a circuit configuration of one cell 310 arranged in the gate leakage current measurement region 370.
- an electrical stress is applied to the transistor 372 to be measured, and a constant electric field is applied to the gate insulating film of the transistor 372 to be measured!] Due to the gate leakage current of the transistor 372 to be measured.
- Charge and discharge integral capacity 388 the measuring apparatus 100 calculates the gate leakage current of each transistor under measurement 372 based on the change in the voltage value of the integration capacitor 388 at a predetermined time.
- the circuit configuration of the gate leakage current measurement region 370 is different from the circuit configuration of the region 330 in the configuration of each cell 310.
- FIG. 10 shows the configuration of each cell 310 in the gate leakage current measurement region 370, including a row direction selection unit 302, a column direction selection unit 304, a plurality of row direction selection transistors (306-1, 306-2, and so on).
- the general name), the plurality of current sources (318-1, 318-2, hereinafter collectively referred to as 318), and the output unit 320 are the same as those in FIG.
- Each cell 310 includes a stress application unit 394, a transistor to be measured 372, a gate voltage control unit 371, a first switch 374, a second switch 376, a voltage application unit 382, an integration capacitor 388, and a column direction selection.
- a transistor 392, reset transistors 378 and 380, and an output transistor 390 are included.
- the stress application unit 394 applies an electrical stress to the gate insulating film of the transistor under measurement 372 via the first switch 374. For example, when the transistor under measurement 372 is viewed as a memory cell of the FLASH memory, the stress applying unit 394 applies a voltage for performing data writing and data erasure on the transistor under measurement 372.
- the first switch 374 connects the source terminal and the drain terminal of the transistor 372 to be measured to the stress applying unit 394, and the second switch 376 is off. It becomes a state. By such control, it is possible to apply a desired voltage to each terminal of the transistor under measurement 372 and apply stress.
- the stress applying unit 394 applies the following four types of stress to the transistor under measurement 314 independently or sequentially.
- the above (1) to (4) are methods for applying stress to the transistor under measurement 372 by writing data into the transistor under measurement 372 or erasing data in the transistor under measurement 372.
- the stress application unit 394 applies a voltage to be applied to each terminal of the transistor under measurement 372 to write data to the transistor under measurement 372 or erase data of the transistor under measurement 372. Apply a voltage higher than the voltage to be applied during actual operation, or apply a voltage to each terminal of transistor 372 to be measured.
- each cell 310 is supplied with a reset signal ⁇ , control voltages V 1, V 2, V 3 from the control unit 14.
- the gate voltage controller 371 is connected to the controller 14
- the second switch 376 switches whether to connect the source terminal and the drain terminal of the transistor under measurement to the integration capacitor via the voltage application unit 382.
- the voltage application unit 382 applies a constant voltage to the source terminal and drain terminal of the transistor under measurement 372 via the second switch 376.
- the voltage generated by the voltage application unit 382 is applied to the source terminal and the drain terminal of the transistor under measurement 372. That is, the voltage applying unit 382 controls the electric field applied to the gate insulating film of the transistor under measurement 372 to be substantially constant by applying a constant voltage to the source terminal and the drain terminal of the transistor under measurement 372.
- the voltage marking unit 382 includes an NMOS transistor 384 and a PMOS transistor 386.
- the NMOS transistor 384 is given a gate voltage V corresponding to the voltage to be applied to the source terminal and drain terminal of the transistor 372 to be measured, and the source terminal is connected to the second switch.
- the drain terminal is connected to the integration capacitor 388 via the H 376 to the source terminal and drain terminal of the transistor 372 to be measured.
- the PMOS transistor 386 is provided in parallel with the NMOS transistor 384, is supplied with a gate voltage V corresponding to the voltage to be applied to the source terminal and the drain terminal of the transistor under measurement 372, and the drain terminal is the second terminal.
- the switch 376 is connected to the source terminal and drain terminal of the transistor 372 to be measured, and the source terminal is connected to the integration capacitor 388.
- the NMOS transistor 384 and the PMOS transistor 386 maintain the voltage applied between the gate 'source or the gate' drain of the transistor 372 to be measured even if the gate leak current is integrated into the integration capacitor 388 and the potential changes. Work to keep.
- a constant electric field can be applied to the gate insulating film of the measured transistor 372 regardless of whether the measured transistor 372 is P-type or N-type, and the measured transistor 372
- the integration capacitor 388 can be charged and discharged by the gate leakage current.
- the integration capacitor 388 is charged / discharged by the gate leakage current output from the source terminal and drain terminal of the transistor under measurement 372. That is, the integration capacitor 388 integrates the gate leakage current and converts it into a voltage value.
- the reset transistors 378 and 380 are gates. When the reset signal ⁇ is received at the terminal, the voltage value at the integration capacitor 388 is
- the output transistor 390 receives the voltage at the integration capacitor 388 at the gate terminal, and outputs a source voltage corresponding to the voltage.
- the column direction selection transistor 392 outputs the source voltage of the output transistor 390 to the row direction selection transistor 306 in response to a signal from the column direction selection unit (VSR) 304.
- VSR column direction selection unit
- FIG. 11 is a flowchart showing an example of the operation of the measuring apparatus 100 when measuring the gate leakage current of the transistor under measurement 372. Before measuring the gate leakage current of each measured transistor 372, first, the control unit 14 applies electrical stress to the measured transistor 372 of each cell 310.
- control unit 14 controls the first switch 374 to the on state and controls the second switch 376 to the off state. Then, the control unit 14 controls the stress applying unit 394 of each cell 310 to apply stress to the transistor under measurement 372. Further, the control unit 14 may apply the stresses (1) to (4) described in FIG. 10 to the transistor under measurement 372 independently or sequentially. In addition, the control unit 14 applies stress to the measured transistor 372 of each cell 310 almost simultaneously.
- control unit 14 After performing the above operation, the control unit 14 sequentially selects each measured transistor 372 and measures the gate leakage current of the selected measured transistor 372.
- the selection operation of the measured transistor 372 Since this is the same as the selection operation described in FIG. 5 and FIG. 8, its description is omitted. In this example, an operation for measuring the gate leakage current of one transistor under measurement 372 will be described.
- control unit 14 controls the first switch 374 to be in an off state and controls the second switch 376 to be in an on state. Then, the control unit 14 applies a gate voltage of approximately 0 V to the gate terminal of the transistor under measurement 372 (S416). At this time, no gate leakage current is generated in the transistor 372 to be measured.
- control unit 14 sets the voltage of the integration capacitor 388 to a predetermined initial voltage value. At this time, the control unit 14 controls the reset transistor 380 to set the initial voltage V in the integration capacitor 388. This setting controls the reset transistors 378 and 380 to be on. Reset signal ⁇
- the characteristic measurement unit 16 sets the voltage of the integration capacitor 388 to the initial voltage value, and then reads the change in the voltage value of the integration capacitor 388 for a predetermined time (S418). At this time, the control unit 14 causes the row direction selection unit 302 and the column direction selection unit 304 to select the cell 310. Further, the characteristic measuring unit 16 receives the voltage output from the output unit 320 as the voltage of the integration capacitor 388.
- the characteristic measurement unit 16 calculates the current value (first current value) of the background current of the cell 310 based on the amount of change in the voltage output by the output unit 320 during the predetermined period. (S420). At this time, since no gate leakage current is generated in the transistor under measurement 372, the integration capacitor 388 is charged and discharged by the knock ground current. Therefore, the background current can be determined based on the voltage change of the integration capacitor 388 during a predetermined period.
- control unit 14 applies a positive or negative gate voltage to the gate terminal of the transistor under measurement 372 (S422). At this time, the voltages V and V are controlled, and the measured transistor 372
- the voltage applied between the gate 'source or gate' drain is kept substantially constant. At this time, a gate leakage current corresponding to the gate voltage is generated in the transistor under measurement 372.
- control unit 14 sets the voltage of the integration capacitor 388 to a predetermined initial voltage value.
- characteristic measurement unit 16 sets the voltage of the integration capacitor 388 to the initial voltage value, and then reads the change in the voltage value of the integration capacitor 388 during the predetermined period described above (S424).
- the characteristic measurement unit 16 calculates a second current value indicating the sum of the knock ground current and the gate leakage current based on the amount of change in the voltage value of the integration capacitor 388 in the predetermined period. Calculate (S426). At this time, the integration capacitor 388 is charged / discharged by the sum of the background current and the gate leakage current. Therefore, the sum of the knock ground current and the gate leakage current can be measured based on the voltage change of the integration capacitor 388 in a predetermined period.
- the characteristic measuring unit 16 calculates the current value of the gate leakage current by subtracting the first current value from the calculated second current value (S428). This control eliminates the effect of the knock-down current and accurately determines the gate leakage current of the transistor under measurement 372. It can be measured well. Also, since the gate-leakage current is integrated and measured, a minute gate leakage current can be measured.
- FIG. 12 is a diagram showing another example of the circuit configuration in the gate leakage current measurement region 370. As shown in FIG. FIG. 12 also shows the configuration of each cell 310 in the gate leakage current measurement region 370, as in FIG. Each cell 310 has a voltage V, V, V, signal ⁇ from the control unit 14.
- VSR column direction selector
- a position signal is given.
- Each cell 310 includes a measured transistor 372, a stress applying unit 394, and a column direction selection transistor 396.
- the stress applying unit 394 is supplied with voltages V and V, and the signal ⁇
- the stress application unit 394 is the source of the transistor 372 to be measured.
- the transistor under test is connected to the source terminal and the drain terminal and depending on the given signal
- a voltage is applied to the source terminal and the drain terminal of 372.
- the stress applying unit 394 includes the source side stress applying unit 394-1 connected to the source terminal of the measured transistor 372 and the drain side stress applying connected to the drain terminal side of the measured transistor 372. Part 394-2.
- the source side stress applying unit 394-1 includes the bus line to which the voltage V is applied, the ground potential,
- the drain side stress applying unit 394-2 is connected to the bus line to which the voltage V is applied and the ground potential.
- the control unit 14 marks the signal ⁇ , the signal ⁇ , the signal ⁇ , and the signal ⁇ on the stress causal unit 394.
- the stress applying unit 394 applies the stresses (1;) to (4) described in FIG. 10 to the transistor under measurement 372 according to the given signal. For example, (4) When applying the stress Source Era s e to the transistor under measurement 372, the control unit 14 supplies the H-level to indicate to signal [Phi, stress applying section 394.
- control unit 14 may supply a signal ⁇ indicating the H level.
- control unit 14 (3) Hot Electron inj
- control unit 14 may apply a signal ⁇ that becomes H level.
- control unit 14 forces the signal ⁇ , the signal ⁇ , and the signal according to the stress to be applied.
- a voltage corresponding to the stress to be applied can be applied to each terminal.
- the measuring apparatus 100 measures the gate leakage current of the transistor under measurement 372 after sequentially applying the stresses described above to the stress applying unit 394. At this time, a predetermined gate voltage V is applied to the gate terminal of the transistor 372 to be measured.
- the column direction selection unit 304
- the column direction selection transistor 396 is connected to the source terminal of the transistor under measurement 372, and switches between whether to pass the source current and whether it is connected to the drain terminal and power to pass the drain current. A transistor. With this configuration, the gate leakage current can be passed regardless of whether the transistor 372 to be measured is a P-type or an N-type.
- gate leak current is applied to output section 320.
- the output unit 320 has a function of outputting a current value.
- the characteristic measuring unit 16 detects the gate leakage current characteristic of the measured transistor 372 based on the current value output by the output unit 320. Even with such a configuration, it is possible to measure the gate leakage current of each transistor under measurement 372 and calculate the variation in the gate leakage current.
- FIG. 13 is a diagram showing variations in gate leakage current displayed on the display unit of the display device 18. is there.
- the display device 18 includes a storage unit for storing the gate leakage current of each transistor under measurement 372 measured by the measuring device 100 and the position of each transistor under measurement 372 in the plane of the wafer 500 in association with each other, a gate leak And a display unit for displaying current variation.
- the storage unit may receive the gate leakage current from the characteristic measurement unit 16 and may receive the position information of the transistor under measurement 372 corresponding to the gate leakage current from the control unit 14.
- the control unit 14 gives a selection signal to be supplied to the test circuit 300 to the storage unit as position information of the transistor under measurement 372.
- the display unit displays the gate leakage current measurement region 370 of each test circuit 300 provided on the wafer 500 described in FIG.
- each test circuit 300 is provided inside each electronic device 510.
- the display unit displays each gate leak current measurement region 370 at a coordinate corresponding to the position of each gate leak current measurement region 370 on the display surface corresponding to the in-plane of wafer 500. Further, the display unit displays characteristic information corresponding to the current value of the gate leakage current of each transistor under measurement 372 at coordinates corresponding to the position of each transistor under measurement 372.
- the characteristic information may display dots having brightness according to the current value of each gate leakage current on the coordinates of the display surface corresponding to each transistor under measurement 372. Further, the characteristic information may display dots having hues corresponding to the current values of the respective gate leakage currents at the coordinates of the display surface corresponding to the respective transistors under measurement 372.
- the electronic device provided with the gate leakage current measurement region 370 is provided. Estimate that the whole 510 is bad be able to.
- B in FIG. 13 when a region having a large gate leakage current and a region having a small gate leakage current appear along a predetermined shape over a plurality of gate leakage current measurement regions 370, an element is formed on the wafer 500. It can be estimated that non-uniformity of the cleaning process occurs in the cleaning process.
- FIG. 14 is a flowchart showing an example of a device manufacturing method for forming a plurality of electronic devices 510 on the wafer 500.
- a plurality of electronic devices 510 are formed on Ueno 500 (S600).
- a plurality of test circuits 300 are formed on the wafer 500 (S602).
- the electronic device 510 and the test circuit 300 are formed by the same process.
- the test circuit 300 is formed inside each electronic device 510.
- the test circuit 300 described in FIG. 4, 10, or 12 is formed.
- the S602 performs a plurality of transistors to be measured 314, a selection unit (302, 304), and an output unit 320 for each test circuit 300.
- the electrical characteristics of the test circuit 300 are measured (S604).
- S604 as described in FIG. 5, 8, 9, or 11, there are variations in the threshold voltage, current-voltage characteristics, PN junction leakage current, gate leakage current, etc. of the transistor under test provided in each test circuit 300. Measure. Then, the pass / fail of the corresponding electronic device 510 is determined based on the above-described variation in characteristics in each test circuit 300.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
- Semiconductor Integrated Circuits (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
Abstract
Description
Claims
Priority Applications (11)
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PCT/JP2005/012359 WO2007004289A1 (ja) | 2005-07-04 | 2005-07-04 | テスト用回路、ウェハ、測定装置、デバイス製造方法、及び表示装置 |
JP2006521030A JP3972076B2 (ja) | 2005-07-04 | 2005-07-04 | テスト用回路、ウェハ、測定装置、デバイス製造方法、及び表示装置 |
KR1020077021630A KR100991408B1 (ko) | 2005-07-04 | 2005-07-04 | 테스트용 회로, 웨이퍼, 측정장치, 디바이스 제조방법 및표시장치 |
CN2005800491869A CN101147264B (zh) | 2005-07-04 | 2005-07-04 | 测试电路、晶圆、测量装置、元件制造方法以及显示装置 |
EP13170404.1A EP2660867A3 (en) | 2005-07-04 | 2005-07-04 | Testing circuit, wafer, measuring apparatus, device manufacturing method and display device |
EP05755708A EP1901356A4 (en) | 2005-07-04 | 2005-07-04 | TEST CIRCUIT, WAFER, MEASURING DEVICE, COMPONENT MANUFACTURING METHOD AND DISPLAY EQUIPMENT |
TW095124262A TWI459004B (zh) | 2005-07-04 | 2006-07-04 | 測試電路、晶圓、測量裝置、元件製造方法以及顯示裝置 |
US11/857,444 US7863925B2 (en) | 2005-07-04 | 2007-09-19 | Test circuit, wafer, measuring apparatus, and measuring method |
US12/899,557 US7965097B2 (en) | 2005-07-04 | 2010-10-07 | Test circuit, wafer, measuring apparatus, measuring method, device manufacturing method and display apparatus |
US13/102,046 US20110212552A1 (en) | 2005-07-04 | 2011-05-05 | Device manufacturing method |
US13/102,042 US20110209567A1 (en) | 2005-07-04 | 2011-05-05 | Display apparatus |
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JP2010055697A (ja) * | 2008-08-28 | 2010-03-11 | Elpida Memory Inc | 半導体記憶装置及びそのテスト方法 |
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CN103134438A (zh) * | 2011-12-02 | 2013-06-05 | 宁波中嘉科贸有限公司 | 复合式量测治具 |
CN103197222B (zh) * | 2013-03-22 | 2016-04-06 | 上海华虹宏力半导体制造有限公司 | 晶体管漏电流的测试方法 |
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-
2005
- 2005-07-04 WO PCT/JP2005/012359 patent/WO2007004289A1/ja not_active Application Discontinuation
- 2005-07-04 JP JP2006521030A patent/JP3972076B2/ja active Active
- 2005-07-04 CN CN2005800491869A patent/CN101147264B/zh not_active Expired - Fee Related
- 2005-07-04 EP EP13170404.1A patent/EP2660867A3/en not_active Withdrawn
- 2005-07-04 EP EP05755708A patent/EP1901356A4/en not_active Withdrawn
- 2005-07-04 KR KR1020077021630A patent/KR100991408B1/ko active IP Right Grant
-
2006
- 2006-07-04 TW TW095124262A patent/TWI459004B/zh not_active IP Right Cessation
-
2007
- 2007-09-19 US US11/857,444 patent/US7863925B2/en not_active Expired - Fee Related
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2010
- 2010-10-07 US US12/899,557 patent/US7965097B2/en not_active Expired - Fee Related
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2011
- 2011-05-05 US US13/102,046 patent/US20110212552A1/en not_active Abandoned
- 2011-05-05 US US13/102,042 patent/US20110209567A1/en not_active Abandoned
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JP2010055697A (ja) * | 2008-08-28 | 2010-03-11 | Elpida Memory Inc | 半導体記憶装置及びそのテスト方法 |
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US20110212552A1 (en) | 2011-09-01 |
EP2660867A2 (en) | 2013-11-06 |
US7965097B2 (en) | 2011-06-21 |
CN101147264A (zh) | 2008-03-19 |
CN101147264B (zh) | 2012-06-20 |
KR20070120964A (ko) | 2007-12-26 |
US20110209567A1 (en) | 2011-09-01 |
US20110018577A1 (en) | 2011-01-27 |
TWI459004B (zh) | 2014-11-01 |
EP2660867A3 (en) | 2014-02-12 |
KR100991408B1 (ko) | 2010-11-03 |
EP1901356A4 (en) | 2012-03-07 |
JPWO2007004289A1 (ja) | 2009-01-22 |
US20080224725A1 (en) | 2008-09-18 |
EP1901356A1 (en) | 2008-03-19 |
JP3972076B2 (ja) | 2007-09-05 |
US7863925B2 (en) | 2011-01-04 |
TW200706892A (en) | 2007-02-16 |
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