WO2006059373A1 - 半導体装置及び半導体装置の制御方法 - Google Patents
半導体装置及び半導体装置の制御方法 Download PDFInfo
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- WO2006059373A1 WO2006059373A1 PCT/JP2004/017806 JP2004017806W WO2006059373A1 WO 2006059373 A1 WO2006059373 A1 WO 2006059373A1 JP 2004017806 W JP2004017806 W JP 2004017806W WO 2006059373 A1 WO2006059373 A1 WO 2006059373A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/10—Programming or data input circuits
- G11C16/12—Programming voltage switching circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2216/00—Indexing scheme relating to G11C16/00 and subgroups, for features not directly covered by these groups
- G11C2216/12—Reading and writing aspects of erasable programmable read-only memories
- G11C2216/14—Circuits or methods to write a page or sector of information simultaneously into a nonvolatile memory, typically a complete row or word line in flash memory
Definitions
- the present invention relates to a semiconductor device and a method for controlling a semiconductor device.
- FIG. 1 is a diagram showing a circuit configuration at the time of writing in a conventional nonvolatile semiconductor memory device.
- the nonvolatile semiconductor memory device 20 includes a program voltage generation circuit 1, a program voltage supply circuit 2, a data-in buffer circuit (dinbuf—be) 3, a Y decoder (ysel) 4, and a memory cell 5.
- the memory cell 5 is a flash memory having a floating gate or a nitride film as a charge storage layer, and writing is performed by applying a high voltage to the drain terminal of the memory cell 5 and injecting hot carriers into the charge storage layer. Is called.
- the write high voltage VPROG in the nonvolatile semiconductor memory device 20 is a voltage in which the high voltage generated by the program voltage generation circuit 1 is regulated to a constant voltage, and is connected to the bit line BL via the program voltage supply circuit 3. To the common data bus line.
- Patent Document 1 uses a constant current element that limits the current supplied to the drain of the memory cell to a current equal to or higher than a predetermined value when electrons are injected into the floating gate by hot electrons. By controlling the gate supplied to the control gate by the output of a predetermined comparator, the write time can be minimized.
- Patent Document 1 Japanese Published Patent Publication No. 2001-15716
- the program voltage generation circuit (drain pump) 1 that supplies current to the drain of the memory cell 5 has a current greater than (number of bits to be written) X (program current per bit). If a supply capacity is required and multiple bits are programmed at the same time, the current flowing through the memory cell 5 during programming is large, so the output voltage of the drain pump decreases, and multiple bits cannot be written simultaneously.
- the number of program voltage generators 1 It is possible to increase the current supply capacity by increasing the number, but there is a problem that the circuit scale becomes large. In addition, there is a problem that the gate voltage cannot be accurately controlled depending on the technique described in Patent Document 1 described above.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a semiconductor device capable of simultaneously writing multiple bits without increasing the circuit scale, and a method for controlling the semiconductor device. To do.
- the present invention provides a write voltage supply circuit that supplies a write voltage to the drain of a memory cell, and a clock that is determined based on the write voltage supplied by the write voltage supply circuit And a voltage generating circuit that generates a voltage to be supplied to the gate of the memory cell using a signal.
- the voltage to be supplied to the gate of the memory cell is generated using the clock signal determined based on the write voltage supplied by the write voltage supply circuit. Multiple bits can be written simultaneously by accurately controlling the gate voltage so that the current supply capacity is not exceeded. Therefore, it is possible to perform writing using the maximum capability of the program voltage generation circuit.
- the circuit scale does not increase.
- the voltage generation circuit When the write voltage supplied from the write voltage supply circuit drops below a predetermined voltage, the voltage generation circuit outputs a second clock signal having a frequency lower than that of the first clock signal to the write voltage.
- a clock signal Preferably used as a clock signal, determined by According to the present invention, when the write voltage drops below a predetermined voltage, the gate voltage boost can be delayed and multiple bits are written simultaneously so as not to exceed the current supply capability of the program voltage generation circuit. be able to.
- the semiconductor device of the present invention is further determined based on the write voltage by converting a frequency of a clock signal output from a predetermined oscillation circuit in accordance with a write voltage supplied by the write voltage supply circuit.
- the gate voltage can be controlled so as not to exceed the current supply capability of the program voltage generation circuit.
- the semiconductor device of the present invention further includes reducing the frequency of the clock signal output from the predetermined oscillation circuit when the write voltage supplied by the write voltage supply circuit drops below a predetermined voltage.
- the semiconductor device of the present invention further includes a detection circuit that detects a decrease in the write voltage supplied from the write voltage supply circuit based on the output voltage of the write voltage supply circuit. According to the present invention, it is possible to detect whether or not the current supply capability of the program voltage generation circuit is exceeded by monitoring the output voltage of the voltage supply circuit.
- the semiconductor device of the present invention further includes a detection circuit that detects a decrease in the write voltage supplied by the write voltage supply circuit based on an output current of the write voltage supply circuit. According to the present invention, it is possible to detect whether or not the current supply capability of the program voltage generation circuit is exceeded by monitoring the output current of the voltage supply circuit.
- the semiconductor device of the present invention further includes a generation circuit that generates a control signal for controlling a frequency of a clock signal converted by the frequency conversion circuit in accordance with a write voltage supplied by the write voltage supply circuit. including.
- the voltage generation circuit generates a voltage to be supplied to the gate of the memory cell by a rubbing gate method.
- the voltage generation circuit is constituted by, for example, a diode type charge pump.
- the semiconductor device is a semiconductor memory device.
- the present invention generates a voltage to be supplied to the gate of the memory cell using a supply step of supplying a write voltage to the drain of the memory cell and a clock signal determined based on the write voltage. And a generation step.
- the voltage supplied to the gate of the memory cell is generated by using the clock signal determined based on the write voltage supplied by the write voltage supply circuit, so that the current of the program voltage generation circuit is Multiple bits can be written simultaneously by accurately controlling the gate voltage so that the supply capacity is not exceeded. Therefore, it is possible to perform writing using the maximum capability of the program voltage generation circuit.
- the circuit scale does not increase because there is no need to increase the number of program voltage generation circuits.
- the method for controlling a semiconductor device of the present invention further includes a step of converting a clock signal output from a predetermined oscillation circuit into a clock signal having a low frequency when the write voltage drops below a predetermined voltage,
- the generating step generates a voltage to be supplied to the gate of the memory cell using the clock signal after the conversion.
- the boosting of the gate voltage can be delayed according to the decrease of the write voltage.
- the semiconductor device control method of the present invention further includes a step of detecting the write voltage based on an output voltage of a write voltage supply circuit. According to the present invention, it is possible to detect whether or not the current supply capability of the program voltage generation circuit is exceeded by monitoring the output voltage of the voltage supply circuit.
- the method for controlling a semiconductor device of the present invention further includes a step of detecting the write voltage based on an output current of a write voltage supply circuit. According to the present invention, it is possible to detect whether or not the current supply capability of the program voltage generation circuit is exceeded by monitoring the output current of the voltage supply circuit.
- FIG. 1 is a diagram showing a circuit configuration at the time of writing in a conventional nonvolatile semiconductor memory device.
- FIG. 2 is a diagram showing a partial circuit configuration of the nonvolatile semiconductor memory device according to the first embodiment.
- FIG. 3 is a diagram showing a circuit configuration of a part of the nonvolatile semiconductor memory device according to the first embodiment.
- FIG. 4 is a diagram showing a WL voltage generating circuit according to the first embodiment.
- FIG. 5 is a diagram showing a program voltage supply circuit according to the first embodiment.
- FIG. 6 is a diagram showing a program voltage detection circuit according to the first embodiment.
- FIG. 7 is a diagram showing a WL voltage control signal generating circuit according to the first embodiment.
- FIG. 8 is a diagram showing a frequency conversion circuit according to the first embodiment.
- FIG. 9 is a diagram showing a shifter according to the first embodiment.
- FIG. 10 is a timing chart of the nonvolatile semiconductor memory device according to the first embodiment.
- FIG. 11 is a diagram showing a partial circuit configuration of the nonvolatile semiconductor memory device according to the second embodiment.
- FIG. 12 is a diagram showing a partial circuit configuration of the nonvolatile semiconductor memory device according to the second embodiment.
- FIG. 13 is a diagram showing a WL voltage control signal generating circuit according to a second embodiment.
- FIG. 2 is a diagram showing a partial circuit configuration of a nonvolatile semiconductor memory device according to a first embodiment.
- FIG. 3 is a diagram showing a partial circuit configuration of the nonvolatile semiconductor memory device according to the first embodiment.
- the nonvolatile semiconductor memory device 100 includes a program voltage generation circuit 1, a program voltage supply circuit 2, a data-in buffer circuit 3, a Y decoder (ysel) 4, a memory cell 5, and a program.
- a voltage detection circuit 6, a WL voltage control signal generation circuit 7, an oscillation circuit 8, a frequency conversion circuit 9, a WL voltage generation circuit 10, a WL voltage supply circuit 11, and an X decoder 12 are included.
- an N-type source region and a drain region are formed on a p-type substrate surface, and a floating gate and a control gate are formed on a channel region between these regions via an insulating film.
- the control gate is connected to the word line WL, the drain region is connected to the bit line, and the source region is connected to the source line.
- the program voltage generation circuit 1 is configured by, for example, a diode-type charge pump, and generates a boost voltage DPUMP in order to supply the write voltage VPROG to the bit line BL.
- the program voltage supply circuit 2 supplies the write voltage VPROG to the drain of the memory cell 5.
- the program voltage supply circuit 2 adjusts the boost voltage DPUMP generated by the program voltage generation circuit 1 and connects the write voltage VPROG to the bit line BL! To the data bus.
- the program voltage supply circuit 2 generates an internal reference voltage CDV and a signal VPROGCOMP 1.
- the program voltage detection circuit 6 detects a decrease in the write voltage V PROG supplied by the program voltage supply circuit 2 based on the output voltage of the program voltage supply circuit 2. Specifically, the program voltage detection circuit 6 detects the level of the write voltage VPROG based on the internal reference voltage CDV of the program voltage supply circuit 2 and the second reference voltage VREF2.
- the current flowing through the memory cell 5 during programming is determined by the level of charge injection into the memory cell 5 and the drain voltage of the memory cell 5 'gate voltage.
- the current supply capability of the program voltage generation circuit 1 is controlled by controlling the gate voltage so as not to exceed the current supply capability of the program voltage generation circuit 1 according to the write voltage VPROG. To be able to write multiple bits at the same time.
- the WL voltage control signal generation circuit 7 controls the frequency of the clock signal VP P—OSC converted by the frequency conversion circuit 9 according to the output voltage of the program voltage supply circuit 2 detected by the program voltage detection circuit 6 Control signal ENVPPSL2 is generated.
- the oscillation circuit 8 generates a clock signal OSC by an oscillation operation.
- the frequency conversion circuit 9 receives the control signal ENVPPSL2 and the signal PGM that becomes High during programming, and converts the clock signal OSC into the clock signal VPP-OSC. For example, the frequency conversion circuit 9 slows the frequency of the clock signal OSC from the oscillation circuit 8 when the voltage drop occurs due to a constant value of the output of the program voltage supply circuit 2 that supplies the drain voltage.
- a clock signal that is determined based on the write voltage is generated by converting to a clock signal VPP-OSC having a lower frequency than the signal OSC.
- the frequency conversion circuit 9 generates a clock signal VPP having the same frequency as that of the clock signal OSC from the oscillation circuit 8 when the output of the program voltage supply circuit 2 that supplies the drain voltage does not drop due to a constant value.
- Output OSC As described above, the frequency conversion circuit 9 outputs the clock output from the oscillation circuit 8 in accordance with the write voltage VPROG supplied from the program voltage supply circuit 2. By converting the frequency of the clock signal OSC, the gate voltage can be boosted slowly as the write voltage decreases.
- the WL voltage generation circuit 10 supplies the gate of the memory cell 5 with a clock signal VPP—OSC determined based on the write voltage VPROG supplied by the program voltage supply circuit 2 by the lambing gate method.
- the ramping gate method is a method in which the voltage is applied to the cell gate while increasing the voltage and programming is performed accurately.
- the WL voltage generation circuit 10 is constituted by, for example, a diode type charge pump, and receives the clock signal VPP-OSC and the signal PGM from the frequency conversion circuit 9, and generates a boosted voltage VPPI that is a high voltage of the word line WL.
- FIG. 4 is a diagram illustrating the WL voltage generation circuit according to the first embodiment.
- the WL voltage generation circuit 10 includes a transistor 101, diodes 102 to 109, and capacitors 110 to 113.
- the WL voltage generation circuit 10 is a charge pump circuit in which a plurality of capacitors 110 to 113 are connected in parallel by diodes 102 to 109.
- the capacitors 110 to 113 are driven by the clock signal VPP—OSC and its complementary signal VPP—OSCB, and the output voltage VPPI is boosted.
- the WL voltage generation circuit 10 determines a boosting rate at which the word line WL boosts according to the clock signal VPP—OSC from the frequency conversion circuit 9. For example, when the write voltage VPROG supplied by the program voltage supply circuit 2 drops below a predetermined voltage, the WL voltage generation circuit 10 uses the second clock signal VPP— whose frequency is lower than that of the first clock signal OSC. The voltage supplied to the gate of the memory cell 5 is boosted using OSC as a clock signal determined based on the write voltage. Note that the step-up rate is lower as the clock is slower.
- the WL voltage supply circuit 11 operates to adjust the boosted voltage VPPI generated by the WL voltage generation circuit 10 to a predetermined voltage, and supplies the gate voltage VPXG to the X decoder 12.
- FIG. 5 is a diagram showing the program voltage supply circuit 2.
- the program voltage supply circuit 2 includes a comparison circuit 21, a PMOS transistor 22, and capacitors 23 and 24.
- the circuit 21 outputs a high signal VPROGCOMP 1 to restrict the gate of the PMOS transistor 22 and regulate the write voltage VPROG so as not to increase further.
- the divided voltage CDV of the write voltage VPROG is supplied to the program voltage detection circuit 6 as an internal reference voltage of the program voltage supply circuit 2, and the output signal VPROGCOMP 1 of the comparison circuit 21 is supplied to the program voltage detection circuit 6.
- FIG. 6 is a diagram showing the program voltage detection circuit 6.
- the program voltage detection circuit 6 includes circuits 61 to 63.
- the circuit 61 includes a PMOS transistor 611, NMOS transistors 612 and 613, a latch circuit 614, and inverters 615 and 616.
- the signal PGM that goes high during programming and the output signal VPROGCOMP1 of the comparison circuit 21 of the program voltage supply circuit 2 are converted into a signal SLD. Is generated.
- the circuit 62 includes a NAND circuit 621 and an inverter 622, and generates a signal SLD and a signal PGM power signal ENVPPSL1.
- the circuit 63 includes a comparison circuit 631 and an inverter 632.
- reference voltage VREF2 ⁇ reference voltage VREF1 is set.
- the latch circuit 614 latches the signal High (output DB side)
- the comparison circuit 631 is activated. Thereafter, when the write voltage VPROG decreases and the divided voltage CDV becomes lower than the reference voltage VREF2, the signal VPROGCOMP2 becomes High.
- FIG. 7 is a diagram showing the WL voltage control signal generation circuit 7.
- the WL voltage control signal generation circuit 7 includes a PMOS transistor 71, NMOS transistors 72 and 73, and a latch circuit 74.
- the signal ENVPPSL1 and the signal VPROGCOMP2 become active (High)
- the WL voltage control signal generation circuit 7 latches the signal High (output DB side) and generates the High level signal ENVPPSL2.
- This signal ENVPPPSL 2 is input to the frequency conversion circuit 9 to adjust the potential applied to the gate of the memory cell 5.
- FIG. 8 is a diagram showing the frequency conversion circuit 9.
- the frequency conversion circuit 9 includes circuits 91 to 94.
- the circuit 91 includes inverters 911 to 917, a NAND circuit 918, and a capacitor 919.
- the signal PGM is input to the inverter 911, and the inverter 912 and The output of the inverter 915 is input to the NAND circuit 918, the signal R STCNT is output from the inverter 916, and the inverted signal RSTCNTB is output from the inverter 917 to the circuit 93.
- the circuit 91 outputs a low pulse to cause the circuit 93 to reset.
- the circuit 92 includes inverters 921 to 926 and NOR circuits 927 to 929.
- the signal ENVPPSL2 from the WL voltage control signal generation circuit 7 is input to the inverter 921, and the output of the inverter 921 and the clock signal OSC are the NOR circuit 927.
- the output of NOR circuit 927 is input to inverter 922 and NOR circuit 929, the output of inverter 924 is input to NOR circuit 929, the output of inverter 926 is input to NOR circuit 928, and the output of inverter 924 Is input to the shifter 931 as the signal ERCLK and the output of the inverter 926 as the signal ERCLKB.
- circuit 92 disables clock signal OSC and fixes signal ERCLK low when signal ENVPPSL2 is at SLow, and enables clock signal OSC and disables signal ERCLK when signal ENVPPSL2 is High.
- This signal ERCLK is a signal for driving the circuit 93.
- the circuit 93 is a frequency dividing circuit including shifters 931 and 932.
- FIG. 9 is a diagram showing the shifter 931. As shown in FIG. 9, a shifter 931, PMOS transistors 932 to 934, NMOS transistors 935 to 941, inverters 942 to 948, and NAND circuits 949 and 950 are included.
- a clock signal CLK100 or a clock signal CLK200 is generated from the signal ERCLK, the signal ERCLKB, the signal RSTCNT, and the signal RSTCNTB and supplied to the circuit 94.
- the circuit 93 generates the double-cycle clock signal CLK100 and the quadruple-cycle clock signal CLK200 when the signal ERCLK is clocked according to the clock signal OSC, and the signal ERCLK is fixed. Does not generate a clock signal.
- circuit 94 includes inverters 941 and 942 and NOR circuits 943 to 945.
- the clock signal CLK100 or the clock signal CLK200 and the enable signal ENB are input to the NOR circuit 943.
- the selection of the clock signal CLK100 or the clock signal CLK200 is performed by metal wiring.
- the enable signal ENB the output of the inverter 941 and the clock signal OSC are input to the NOR circuit 944.
- the outputs of NOR circuit 943 and 944 are input to NOR circuit 945, and clock signal VPP OSC is output from inverter 942. It is output to the WL voltage generation circuit 10.
- signal VPP—OSC is clock signal OSC
- signal EN B is Low
- signal VPP—OSC is The clock signal is CLK 100 or CLK200.
- the frequency of the clock signal VPP—OSC is twice that of the clock signal OSC
- the frequency of the clock signal VP P—OSC is four times that of the clock signal OSC. It is set to be In the following, the clock signal CLK100 is used!
- FIG. 10 is a timing chart of the nonvolatile semiconductor memory device 1 according to the first embodiment.
- the programming operation according to this embodiment there are a case 1 in which the number of write bits is large and a drop occurs in the write voltage VPROG, and a case 2 in which the number of write bits is relatively small and no drop occurs.
- the waveform of case 1 is indicated by a solid line and the waveform of case 2 is indicated by a dotted line.
- the voltage V—PGMV is applied to the word line WL.
- the PMOS transistor 22 in the program voltage supply circuit 2 is always on because the divided voltage CDV of the write voltage VPROG is the reference voltage VREF1, and the write voltage VPROG is rapidly turned on to a predetermined voltage (for example, 5V ).
- the PMOS transistor 22 in the program voltage supply circuit 2 is repeatedly turned on and off (see the waveform of VPROGCOMP1) every time the divided voltage CDV crosses the reference voltage VREF1. The voltage is held so that becomes constant.
- the boosted voltage VPPI rises to a predetermined voltage
- the boosted voltage VPPI is supplied to the gate voltage VPXG, and the gate voltage VPXG is output to the word line WL to start an actual program to the memory cell 5 (5). At this time, it is driven by the oscillation circuit 8.
- the PMOS transistor 22 in the program voltage supply circuit 2 is a power that is always on in the case of the divided voltage CDV of the write voltage VPROG and the reference voltage VREF1, but the reference voltage VPROG is still lowered and the divided voltage CDV is the reference.
- the boost voltage VPPI that is, the word line voltage boost rate is lowered (6).
- the write voltage VPROG returns to a predetermined potential, and thus the regulation is performed in the same manner as in (5).
- the WL voltage generation circuit 10 is driven by the clock signal VPP-OSC having the same cycle as the clock signal OSC, so that the voltage is boosted quickly.
- the WL voltage generation circuit 10 when the word line voltage rises to a certain level and the write voltage VPROG drops (ENV PPSLS2 goes high), the WL voltage generation circuit 10 generates a double-period clock signal VP P— Driven by OSC, the boosting rate of the word line WL is controlled low.
- the gate voltage VPXG is boosted to MAX (about 9V) and then regulated to maintain a constant voltage (10).
- the program voltage detection circuit 6 activates the signal PGM only for a predetermined period, but the signal VPROGCOMP2 goes high and the write voltage
- the chip control circuit controls the length of time that signal PGM is active to increase the program time.
- the period shown in (1) indicates the difference in program time between Case 1 and Case 2.
- the output voltage from the program voltage supply circuit 2 that supplies the drain voltage is monitored, and the gate voltage is controlled when a voltage drop occurs due to a certain value.
- the current supply capability of the program voltage generator circuit 1 is maximized. Can use the program.
- FIG. 11A is a diagram showing a circuit configuration of a part of the nonvolatile semiconductor memory device according to the second embodiment.
- FIG. 12 is a diagram showing a circuit configuration of a part of the nonvolatile semiconductor memory device according to the second embodiment.
- the nonvolatile semiconductor memory device 200 includes a program voltage generation circuit 1, a program voltage supply circuit 2, a data-in buffer circuit 3, a Y decoder (ysel) 4, a memory cell 5, and a WL voltage control.
- a signal generation circuit 207, an oscillation circuit 8, a frequency conversion circuit 9, a WL voltage generation circuit 10, a WL voltage supply circuit 11, an X decoder 12 and a current detection circuit 213 are included.
- the gate is controlled by the voltage applied to the word line WL.
- the no-transistors 41 and 42 are for selecting the bit line BL.
- the data-in buffer circuit 3 includes NMOS transistors 31 to 33, PMOS transistors 34 to 36, and an inverter 37.
- the NMOS transistors 32 and 33 and the PMOS transistors 34 and 35 constitute a level shift circuit.
- the write high voltage VPROG is supplied as it is from the PMOS transistor 36 to the data bus DA TABn.
- the current detection circuit 213 detects a decrease in the write voltage VPROG supplied by the program voltage supply circuit 2 based on the output current of the program voltage supply circuit 2.
- the current detection circuit 213 includes a PMOS transistor 214 and a comparison circuit 215.
- the PMOS transistor 214 has a gate and a drain connected between the output of the program voltage supply circuit 2 and the 16-bit data bus DATABn.
- the comparison circuit 215 includes NMOS transistors 51 to 53, PMOS transistors 54 and 55, an inverter 56, and resistors 57 and 58. The voltage at the terminals above and below the PMOS transistor 214 is supplied to the comparison circuit 215.
- the input of the comparison circuit 215 and the PMOS transistor 214 have a current mirror configuration, and the transistor size of the input transistor 54 of the comparison circuit 215 is preferably smaller.
- FIG. 13 is a diagram showing a WL voltage control signal generation circuit.
- the WL voltage control signal generation circuit 207 includes circuits 216 and 217.
- the circuit 216 includes a PMOS transistor 81, NMOS transistors 82 and 83, a latch circuit 84, and inverters 85 and 86.
- the circuit 216 generates a signal SLD from the signal PGM that goes High during programming and the output signal VCB of the current detection circuit 213.
- the circuit 217 includes a NAND circuit 87 and an inverter 88, generates a signal SLD and a signal PGM force signal ENVPPSL2, and supplies the signal SLD and the signal PGM force signal ENVPPSL2.
- the WL voltage control signal generation circuit 207 latches the signal High (output DB side) and generates the High signal ENVPPSL2.
- This signal ENVPPPSL2 is used to adjust the potential applied to the gate of memory cell 5.
- the oscillation circuit 8 generates the clock signal OSC.
- the frequency conversion circuit 9 receives the control signal ENVPPSL2 and the signal PGM, and converts the clock signal OSC into the clock signal VPP-OSC.
- the WL voltage generation circuit 10 is a circuit that receives the clock signal VPP—OSC from the frequency conversion circuit 9 and generates a boosted voltage VPPI that is a high voltage of the word line WL.
- the WL voltage generation circuit 10 determines the boosting rate at which the node line WL boosts according to the clock signal VPP-OSC from the frequency conversion circuit 9.
- the WL voltage supply circuit 11 operates to adjust the boosted voltage VPPI generated by the WL voltage generation circuit 10 to a predetermined voltage, and supplies the gate voltage VPXG to the X decoder 12.
- the output current from the program voltage supply circuit 2 that supplies the drain voltage is monitored, and when the current flows from a certain value, the WL voltage generation circuit 10
- the gate voltage By controlling the gate voltage by slowing the frequency of the oscillation signal that is the input internal clock signal, it is possible to prevent excessive current from flowing through the memory cell. wear.
- the non-volatile semiconductor memory device may be incorporated in a semiconductor device.
- the frequency conversion circuit converts the frequency of the clock signal from the oscillation circuit to obtain clock signals having different frequencies.
- a plurality of oscillation circuits are provided. It is also possible to generate a clock signal having a different frequency, select a clock signal to be used according to the write voltage in the WL voltage generation circuit, and generate a voltage to be supplied to the gate of the memory cell.
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Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006546539A JP4738347B2 (ja) | 2004-11-30 | 2004-11-30 | 半導体装置及び半導体装置の制御方法 |
| PCT/JP2004/017806 WO2006059373A1 (ja) | 2004-11-30 | 2004-11-30 | 半導体装置及び半導体装置の制御方法 |
| CN200480044853XA CN101107674B (zh) | 2004-11-30 | 2004-11-30 | 半导体装置以及半导体装置的控制方法 |
| DE112004003022T DE112004003022B4 (de) | 2004-11-30 | 2004-11-30 | Halbleiterbauelement und Verfahren zum Steuern desselben |
| GB0710009A GB2434675B (en) | 2004-11-30 | 2004-11-30 | Semiconductor device and semiconductor control method |
| US11/289,997 US7227780B2 (en) | 2004-11-30 | 2005-11-30 | Semiconductor device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2004/017806 WO2006059373A1 (ja) | 2004-11-30 | 2004-11-30 | 半導体装置及び半導体装置の制御方法 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/289,997 Continuation US7227780B2 (en) | 2004-11-30 | 2005-11-30 | Semiconductor device and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006059373A1 true WO2006059373A1 (ja) | 2006-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/017806 Ceased WO2006059373A1 (ja) | 2004-11-30 | 2004-11-30 | 半導体装置及び半導体装置の制御方法 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7227780B2 (ja) |
| JP (1) | JP4738347B2 (ja) |
| CN (1) | CN101107674B (ja) |
| DE (1) | DE112004003022B4 (ja) |
| GB (1) | GB2434675B (ja) |
| WO (1) | WO2006059373A1 (ja) |
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| JP2014049151A (ja) * | 2012-08-30 | 2014-03-17 | Ememory Technology Inc | フラッシュメモリ |
| US8982634B2 (en) | 2012-07-11 | 2015-03-17 | Ememory Technology Inc. | Flash memory |
| KR20170137590A (ko) * | 2016-06-03 | 2017-12-13 | 삼성전자주식회사 | 고전압 발생 회로를 포함하는 비휘발성 메모리 장치 및 비휘발성 메모리 장치의 동작 방법 |
| JP2019511730A (ja) * | 2016-03-14 | 2019-04-25 | アンペア コンピューティング エルエルシーAmpere Computing Llc | 自己参照オンダイ電圧降下検出器 |
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| US7586363B2 (en) * | 2007-12-12 | 2009-09-08 | Sandisk Corporation | Diode connected regulation of charge pumps |
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- 2004-11-30 DE DE112004003022T patent/DE112004003022B4/de not_active Expired - Fee Related
- 2004-11-30 GB GB0710009A patent/GB2434675B/en not_active Expired - Fee Related
- 2004-11-30 WO PCT/JP2004/017806 patent/WO2006059373A1/ja not_active Ceased
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| US8982634B2 (en) | 2012-07-11 | 2015-03-17 | Ememory Technology Inc. | Flash memory |
| JP2014049151A (ja) * | 2012-08-30 | 2014-03-17 | Ememory Technology Inc | フラッシュメモリ |
| JP2019511730A (ja) * | 2016-03-14 | 2019-04-25 | アンペア コンピューティング エルエルシーAmpere Computing Llc | 自己参照オンダイ電圧降下検出器 |
| KR20170137590A (ko) * | 2016-06-03 | 2017-12-13 | 삼성전자주식회사 | 고전압 발생 회로를 포함하는 비휘발성 메모리 장치 및 비휘발성 메모리 장치의 동작 방법 |
Also Published As
| Publication number | Publication date |
|---|---|
| US7227780B2 (en) | 2007-06-05 |
| DE112004003022T5 (de) | 2008-01-10 |
| CN101107674A (zh) | 2008-01-16 |
| GB2434675A (en) | 2007-08-01 |
| GB2434675B (en) | 2010-01-06 |
| GB0710009D0 (en) | 2007-07-04 |
| DE112004003022B4 (de) | 2012-04-05 |
| CN101107674B (zh) | 2012-03-21 |
| US20060245250A1 (en) | 2006-11-02 |
| JPWO2006059373A1 (ja) | 2008-08-07 |
| JP4738347B2 (ja) | 2011-08-03 |
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