WO2002052649A1 - Dispositif semi-conducteur et dispositif electronique portatif - Google Patents
Dispositif semi-conducteur et dispositif electronique portatif Download PDFInfo
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- WO2002052649A1 WO2002052649A1 PCT/JP2001/011228 JP0111228W WO02052649A1 WO 2002052649 A1 WO2002052649 A1 WO 2002052649A1 JP 0111228 W JP0111228 W JP 0111228W WO 02052649 A1 WO02052649 A1 WO 02052649A1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/08—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind
- H01L27/085—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only
- H01L27/088—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
- H01L27/092—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate complementary MIS field-effect transistors
- H01L27/0928—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate complementary MIS field-effect transistors comprising both N- and P- wells in the substrate, e.g. twin-tub
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/761—PN junctions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/8238—Complementary field-effect transistors, e.g. CMOS
- H01L21/823878—Complementary field-effect transistors, e.g. CMOS isolation region manufacturing related aspects, e.g. to avoid interaction of isolation region with adjacent structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/8238—Complementary field-effect transistors, e.g. CMOS
- H01L21/823892—Complementary field-effect transistors, e.g. CMOS with a particular manufacturing method of the wells or tubs, e.g. twin tubs, high energy well implants, buried implanted layers for lateral isolation [BILLI]
Definitions
- the present invention relates to a semiconductor device and a portable electronic device. More specifically, the present invention relates to a semiconductor device using a dynamic threshold transistor and a variable substrate bias transistor, and a portable electronic device using the semiconductor device. Background art
- CMOS Complementary MOS
- MOS FET Metal Oxide Semiconductor Field Effect Transistor
- DTMOS dynamic threshold transistor
- B-DTMOS MOSFET with Advanced Isolation (SIT0S) and Gate to Shallow Well
- the above-mentioned DTMOS has the characteristic that a high drive current can be obtained at a low power supply voltage because the effective threshold value is reduced when it is turned on.
- the effective threshold of the DTMOS is reduced at the on time because the gate electrode and the well region are electrically short-circuited.
- the P-type DTMOS is The same operation is performed by reversing the polarity.
- the potential of the gate electrode is at the low level (when off)
- the potential of the P-type Ueno I ⁇ region is also at the oral level, and the effective threshold is that of a normal MOSFET. And no different. Therefore, the off-current value (off-leakage) is the same as in a normal MOSFET.
- the gate electrode is electrically short-circuited with the U-S region. Therefore, when the potential of the gate electrode changes, the potential of the well also changes. Therefore, the phenol area of each DTMOS must be electrically separated from the ueno area of the adjacent MISFET. Therefore, the well region is composed of a shallow well region and a deep ueno region having different conductivity types from each other. In addition, the shallow p-type regions of each DTMOS are electrically isolated from each other by element isolation regions.
- a MOSFET that changes the energy level between the standby state and the active state is referred to as a substrate bias variable transistor.
- the P-type substrate bias variable transistor performs the same operation by reversing the polarity.
- the N-type substrate bias variable transistor when the circuit is in the active state, 0V or a positive voltage is applied from the bias generation circuit to the P-type well region (based on the source potential).
- a positive voltage is applied to the P-type band / ⁇ region, the effective threshold decreases due to the substrate bias effect, and the drive current increases compared to the case of a normal MOSFET.
- a negative voltage is applied to the P-type well region by the noise generating circuit.
- the effective threshold is increased by the substrate by ⁇ scan effect, the off-leak is reduced compared to conventional MOSFET or DTMOS
- an active state or a standby state is selected for each circuit block. This is because if a bias generation circuit is provided for each element, the number of elements and the circuit area are significantly increased.
- the P-type Ueno I ⁇ region of the N-type MOS FET is common (the same applies to the N-type well region of the P-type MOSFET).
- the MOSFET region in the circuit block must be common. Therefore, the depth of the bottom surface of the element isolation region is set to be deeper than the junction depth between the source region and the drain region of the MOSFET and the shallow p-well region, and shallower than the depth of the lower end of the power region.
- FIG. 10 shows a cross-sectional view of an element manufactured by this technique.
- 11 is semiconductor
- P-type substrate 12 is an N-type deep Wenole region
- 13 is a P-type deep Wenole region
- 14 is an N-type shallow
- Gaell region 15 is a P-type shallow
- ⁇ eno region 16 is an element isolation region
- 1 7 is the source region of the N-type MOS FET
- 18 is the drain region of the N-type MOSFET
- 19 is the source region of the P-type MOSFET
- 20 is the drain region of the P-type MOSFET
- 21 is the contact with the shallow N-type region.
- An N + diffusion layer for taking a contact 22 a P + diffusion layer for making contact with a shallow Ueno ⁇ S region of P type, 23 a gate insulating film, 24 a gate electrode, 25 a P type substrate bias variable transistor, 26 is an N-type variable substrate bias transistor, 27 is an N-type DTMOS, 28? OS of the type 0, 1 ⁇ OS, 29 is a Wenore bias input terminal to the P-type variable body bias transistor, 30 is a well bias input terminal to the N-type variable substrate bias transistor, 31 is a P-type deep ⁇ ⁇ Each shows a fixed bias input terminal.
- the gate electrode 24 and the P-type shallow well region 15 of the N-type DTMOS 27 are electrically connected to the gate electrode 24 and the N-type shallow well region 14 of the P-type DTMOS 28, respectively. Is short-circuited.
- the potentials of the shallow well regions 14 and 15 change according to the potential of the gate electrode 24.
- the shallow jewel regions 14 and 15 are located below the shallow jewel regions 14 and 15. Then, deep-well regions 13 and 12 of the opposite conductivity type to that of the first and the second 15 are formed.
- the element isolation region 16 is formed with a depth sufficient to electrically isolate shallow p-well regions 14 and 15 of adjacent elements. Thus, shallow region 14 and 15 are electrically separated from shallow region 14 and 15 of the adjacent element.
- shallow Ueno regions 14 and 15 of the substrate bias variable transistors 25 and 26 in one circuit block must be common. Therefore, in FIG. 10, a P-type deep well region 13 is formed below the P-type shallow Ueno region 15 of the N-type substrate bias variable transistor 26, and this P-type deep Ueno region 1 is formed.
- Numeral 3 forms a common Ueno B region integrally with the P type shallow Ueno region 15.
- N-type deep ueno V g region 12 is formed further deep in the substrate.
- the P-type deep ueno region 13 is electrically isolated.
- an N-type deep ueno-S region 12 is formed below the N-type shallow p-type region 14 of the P-type substrate bias variable transistor 25.
- the region 12 and the shallow N-type well region 14 together form a common Ueno region.
- Different potentials are applied to the N-type common well region between an active state and a standby state via an input terminal 29 for providing a well-bias to a P-type substrate bias variable transistor 25.
- FIG. 11 and FIG. 12 show a procedure for forming a deep level and a well region in the semiconductor device of the prior art.
- an impurity is implanted to form a P-type deep well region 13, and then a deeper N-type deep well region 12 a is formed.
- the photoresist 34 is used as a mask.
- the N-type deep ueno region 12 b is formed. Impurity implantation for formation is performed.
- the depth of the N-type deep well region 12 b is made substantially equal to the depth of the P-type deep well region 13.
- the P-type deep level region 13 can be electrically separated, but the N-type deep level region 13 can be electrically separated.
- the region 12 is common within one substrate 11. Therefore, a plurality of circuit blocks of N-type substrate bias variable transistors 26, 26,... Can be created in the same substrate 11, but P-type substrate bias variable transistors 25, 25,. ⁇ Multiple circuit blocks cannot be created. Therefore, the plurality of circuit blocks cannot be appropriately divided into an active circuit block and a standby circuit block. For example, even if only a part of the P-type substrate bias variable transistors 25, 25,... Needs to be in the active state, the entire P-type substrate bias variable transistors 25, 25,. It becomes active and the leakage current increases. For this reason, power consumption increases. Disclosure of the invention
- the present invention has been made to solve the above problems, and an object of the present invention is to reduce the power consumption of a semiconductor device and a portable electronic device using a DTMOS and a substrate bias variable transistor.
- the semiconductor device of the present invention is a semiconductor device of the present invention.
- the depth of the second conductivity type A second shallow well region of the first conductivity type formed on the / well region;
- the depth of the second conductivity type A second shallow gel region of the second conductivity type formed on the / ⁇ ⁇ eno region,
- a dynamic threshold transistor of a second conductivity type formed on the second first conductivity type shallow well region, wherein a gate electrode and the second first conductivity type shallow layer region are electrically connected.
- No. _________________________________________________ either the first conductive type dynamic threshold transistor formed on the second conductive type shallow well region, and electrically connected to the good electrode and the first second conductive type shallow well region.
- the second first conductivity type shallow peg region is electrically isolated for each device by the element isolation region and the second conductivity type deep peg region,
- the first second-conductivity-type shallow well region is separated for each device by the element isolation region and the first-conductivity-type deep well region.
- a plurality of circuit blocks of a field effect transistor can be formed. Therefore, for each of the circuit block of the substrate bias field-effect transistor of the first conductivity type and the circuit block of the substrate bias field-effect transistor of the second conductivity type, the circuit block to be activated and the circuit block to be set to the standby state are provided. Can be appropriately divided, and the power consumption of the semiconductor device can be reduced.
- the first conductivity type means a P-type or N-type.
- the second conductivity type means N-type when the first conductivity type is P-type and P-type when the first conductivity type is N-type.
- the plurality of second conductivity type deep plug regions are electrically separated by the first conductivity type semiconductor substrate.
- the plurality of second conductive type deep peg regions are electrically separated by the first conductive type semiconductor substrate, the plurality of second conductive type deep peg regions are simple and inexpensive. To be electrically separated.
- a first conductivity type impurity region is formed between the plurality of second conductivity type deep drain regions, and the plurality of second conductivity type deep well regions are The semiconductor substrate is electrically isolated by the first conductivity type semiconductor substrate and the first conductivity type impurity region.
- the first conductivity type impurity region exists between the plurality of second conductivity type deep well regions, punch-through between the plurality of second conductivity type deep level regions is performed. Is suppressed. Therefore, the margin between the plurality of deep conductive regions of the second conductivity type is reduced, and the degree of integration can be improved.
- an element isolation region is formed between the plurality of second conductivity type deep plug regions, and the plurality of second conductivity type deep plug regions is formed of the first conductivity type. It is electrically isolated by the semiconductor substrate and the element isolation region.
- the element isolation region exists between the plurality of second conductivity type deep plug regions, the parasitic capacitance between the plug region (and the silicon substrate) and the gate wiring or metal wiring is reduced.
- an impurity region of the first conductivity type and an element isolation region are formed between the plurality of deep conductivity regions of the second conductivity type, and the plurality of deep conductivity regions of the second conductivity type are formed. The region is electrically separated by the first conductivity type semiconductor substrate, the first conductivity type impurity region, and the element isolation region.
- the first conductivity type impurity region and the element isolation region exist between the plurality of second conductivity type deep plug regions, a margin between the second conductivity type deep well region is provided. And the parasitic capacitance between the gate region and the metal wiring can be reduced.
- the plurality of deep conductive regions of the second conductivity type are located between the field effect transistor of the first conductivity type and the field effect transistor of the second conductivity type, and It is separated between a field effect transistor and the first conductivity type dynamic threshold transistor or between the first conductivity type field effect transistor and the second conductivity type dynamic threshold transistor.
- the deep gate region of the second conductivity type in the circuit block including the field effect transistor of the first conductivity type (variable substrate bias transistor) and the other element portion (the substrate bias variable of the second conductivity type) Circuit block consisting of transistors, a dynamic threshold transistor of the first conductivity type, and a dynamic threshold transistor of the second conductivity type).
- the deep Ueno B region of the second conductivity type is electrically separated.
- a plurality of circuit blocks of the first-conductivity-type substrate bias variable transistor and a plurality of circuit blocks of the second-conductivity-type substrate bias variable transistor can be formed on one substrate. Deep! The junction capacitance between the well region and another well region can be reduced. In addition, it is possible to suppress the latch-up phenomenon.
- a conductivity type of a shallow plug region on one side and a conductivity type of a shallow plug region on the other side are different from each other;
- the conductivity type of the deep well region on the other side is different from the conductivity type of the deep well region on the other side, and the width of the element isolation region in contact with the deep ueno region on both sides is A, and the shallowness on one side is
- the conductivity type of the ⁇ ⁇ ⁇ region and the shallow groove on the other side The conductivity type of the deep region is the same as that of the deep region on one side, and the conductivity type of the deep region on the other side is the same.
- the conductivity type of the deep ⁇ I region in the region is different from the conductivity type of the deep ⁇ region on the other side, and the width of the element isolation region in contact with the deep ⁇ region on both sides is A, 0.18 ⁇ ⁇ ⁇ ⁇ 0.
- the element isolation region is made of STI (Shallow Trench Isolation).
- the element isolation region is made of STI, element isolation regions having various widths can be easily formed, and a semiconductor device can be manufactured simply and inexpensively.
- the first conductivity type dynamic threshold transistor and the second conductivity type dynamic threshold transistor or the first conductivity type field effect transistor and the second conductivity type field effect transistor, or The first conductivity type dynamic threshold transistor and the second conductivity type field effect transistor, or the first conductivity type field effect transistor and the second conductivity type dynamic threshold transistor constitute a complementary circuit. are doing.
- a portable electronic device includes the above semiconductor device.
- the portable electronic device includes the semiconductor device, the power consumption of an LSI (large-scale integrated circuit) unit and the like is significantly reduced, and the battery life can be greatly extended.
- FIG. 1 is a sectional view showing a semiconductor device according to the first embodiment of the present invention.
- FIG. 2 is a cross-sectional view illustrating a semiconductor device according to the second embodiment of the present invention.
- FIG. 3 is a sectional view showing a semiconductor device according to the third embodiment of the present invention.
- FIG. 4 is a sectional view showing a semiconductor device according to a fourth embodiment of the present invention.
- FIG. 5 is a sectional view showing a semiconductor device according to a fourth embodiment of the present invention.
- FIG. 6 is a plan view schematically showing a semiconductor device according to the fourth embodiment of the present invention.
- FIG. 7 is a diagram illustrating a method of forming a deep peg region in the semiconductor device according to the fourth embodiment.
- FIG. 8 is a diagram showing a method for forming a deep Ueno region in the semiconductor device according to the fourth embodiment.
- FIG. 9 is a block diagram showing a portable electronic device of the present invention.
- FIG. 10 is a cross-sectional view of a conventional semiconductor device.
- FIG. 11 is a view showing a method of forming a deep peg region of the conventional semiconductor device. .
- FIG. 12 is a view showing a method of forming a deep peg region of the conventional semiconductor device.
- the semiconductor substrate used in the present invention is not particularly limited, but a silicon substrate is preferable. Further, the semiconductor substrate may have a P-type or N-type conductivity. In the following embodiments, a case is described in which a P-type semiconductor substrate is used. In the case where an N-type semiconductor substrate is used, a semiconductor device having the same function can be formed if all the following implanted impurities are of the opposite conductivity type.
- FIG. 1 is a cross-sectional view of a semiconductor device according to an embodiment of the present invention.
- the gate insulating film, gate electrode, source region, drain region, interlayer insulating film, and upper metal wiring are omitted.
- reference numerals 25 and 26 represent variable body bias transistors having the same structure as the conventional example shown in FIG. 10
- reference numerals 27 and 28 are shown in FIG. 5 shows a DTMOS having the same structure as the conventional example shown.
- FIG. 1 the same components as those of the conventional example shown in FIG. 10 are denoted by the same reference numerals as those of the components in FIG. 10 and description thereof is omitted.
- the N-type deep Ueno kl region 12 of the conventional semiconductor device shown in FIG. 10 is electrically connected to the region where the p-type impurity is not implanted (the P-type semiconductor substrate 11). Is divided into The region into which the well impurity has not been implanted may be masked with a photoresist at the time of implanting the well impurity.
- An element isolation region 16 is formed on the semiconductor substrate 11.
- the element isolation region 16 can be formed using, for example, the STI method.
- the method of forming the element isolation region 16 is not limited to the STI method, and the element isolation region 16 may have a function of electrically isolating a shallow well region.
- the material buried in the element isolation region may be a conductive material such as polysilicon / mono-reflective silicon in addition to the silicon oxide film and the silicon nitride film.
- a conductive material such as polysilicon / morphomorph silicon
- the depth of the element isolation region 16 is set so as to electrically isolate shallow well regions of adjacent devices and not electrically isolate deep well regions.
- the depth of the element isolation region 16 is preferably, for example, 0.2 to 2 ⁇ .
- a plurality of ⁇ -shaped deep ueno regions 12 and 12 are formed on the semiconductor substrate 11.
- the difference from the procedure of the conventional example is that a photoresist is masked at a place where it is desired to divide the deep type p-type regions 12 and 12 so that the impurity is not implanted.
- the conditions for impurity implantation may be the same as those described in a fourth embodiment described later.
- the deep type well regions 12 and 12 are electrically separated by a semiconductor substrate (having a conductive type) 11, the impurity concentration of the semiconductor substrate 11 is low ( 10 15 cm—about 3 ), so punch between the N-type deep gel area 1 2 and 1 2 In order to prevent through, it is necessary to provide a sufficient separation width.
- a P-type deep swell region 13 is formed on each of the N-type deep swell regions 12 and 12.
- the conditions for impurity implantation may be the same as those described in a fourth embodiment described later.
- the two P-type deep well regions 13 and 13 above each one N-type deep wenole region 12 are electrically separated by a shallow portion of the N-type deep region 12.
- a first N-type shallow well region 14 is formed on the P-type deep well region 13, and a second N-type shallow ueno region 14 is formed on the N-type deep ueno region 12. It is formed.
- 31 P + is given as an example of an impurity ion that gives N-type conductivity.
- implantation energy one 130 ⁇ 900KeV, it can be formed by ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 2 conditions as injection volume.
- a first P-type shallow plug region 15 is formed on the P-type deep plug region 13, and a second P-type shallow Ueno region 15 is formed on the N-type deep plug region 12. It is formed.
- 11 B + is given as an example of an impurity ion that gives a P-type.
- the 11 B 'Ion as an impurity Ion, 60 ⁇ 500KeV as implantation energy, 5 X 10 11 ⁇ as injection volume: it is possible to Development formed under conditions of LX 10 l4 cm- 2.
- the order of impurity implantation for forming the anodic region is not limited to the above, and the order may be changed.
- the depth of the junction between the shallow-layer regions 14 and 15 and the deep anodic regions 12 and 13 and the depth of the junction between the N-type deep eno! ⁇ S region 12 and the P-type deep ridge region 13 are as follows. It is determined by the implantation conditions of the shallow well regions 14 and 15, the implantation conditions of the deep u-H regions 12 and 13, and a thermal process performed thereafter. The depth of the element isolation region 16 is set so that the shallow peg regions 14 and 15 of adjacent elements are electrically isolated and the deep gage regions 12 and 13 are not electrically isolated.
- a high-concentration buried region of the same conductivity type as the impurity ions of the shallow well regions 14 and 15 may be formed in the shallow layer regions 14 and 15. .
- the resistance of the shallow well regions 14 and 15 decreases, the input to the gate electrode quickly propagates to the shallow well regions 14 and 15 to reduce the substrate bias effect. As a result, the operation of the DTMOS 27, 28 can be performed at a high speed.
- the impurity ion is 11 B +
- the implantation energy is L 0 0 to 40 OKe V
- the implantation amount is 1 ⁇ 10 12 in ⁇ l X 1 0 "cnT 2 conditions or formed during N-type shallow Ueru, is 31 as an impurity Ion P +, 240 ⁇ 7 5 0K e as implantation energy
- V in l X 1 0 12 ⁇ l X 1 0 14 cm- 2 condition as an injection quantity, can be formed.
- impurity ions of the same conductivity type as the impurity ions in the shallow well regions 14 and 15 are introduced into the shallow well regions 14 and 15.
- a punch-through stopper may be injected.
- a gate insulating film and a gate electrode are formed in this order.
- the material of the gut insulating film is not particularly limited as long as it has insulating properties.
- a silicon oxide film, a silicon nitride film, or a laminate thereof can be used as a gate insulating film.
- a high dielectric film such as an aluminum oxide film, a titanium oxide film, a tantalum oxide film, or a laminate thereof can be used.
- the gate insulating film preferably has a thickness of 1 to 10 nm.
- the gate insulating film can be formed by a method such as a chemical vapor deposition (CVD) method, a sputtering method, or a thermal oxidation method.
- the material of the gate electrode is not particularly limited as long as it has conductivity.
- a silicon substrate a silicon film such as polysilicon or single crystal silicon can be used.
- metals such as aluminum and copper Membrane.
- the gate electrode preferably has a thickness of 0.1 to 0.4 xm.
- the gate electrode can be formed by a method such as a CVD method and an evaporation method.
- a sidewall spacer may be formed on the side wall of the gate electrode.
- the material of the sidewall spacer is not particularly limited as long as it is an insulating film, and examples thereof include silicon oxide and silicon nitride.
- a gate-to-substrate connection region is formed in a portion to be a DTMOS.
- a region other than the source region, the drain region and the channel region in order to form a gate-to-substrate connection region for electrically connecting the good electrode to the shallow Ueno region, a part of the good electrode and the gate oxide film is formed on the underlying substrate. Etch until is exposed. In this exposed region, a region with a high impurity concentration (a region with a high P-type impurity in the case of an NMOS and a region with a high N-type impurity in the case of a PMOS) is formed.
- the gate electrode and the shallow well region are electrically connected in the gate-substrate connection region by a silicidation process performed later.
- source and drain regions having conductivity types opposite to the conductivity types of the shallow tungsten W regions 14 and 15 are formed on the surface layers of the shallow well regions 14 and 15. .
- the source region and the drain region can be formed in a self-aligned manner, for example, by implanting impurity ions of a conductivity type opposite to that of the shallow peg region using the gate electrode as a mask.
- the source region and the drain region are, for example, when 75 As + ions are used as impurity ions, the implantation energy is 3 to: L 0 OKe V, and the implantation amount is 1 ⁇ 10 15 to 1 ⁇ 10 16 cm. — If the condition of 2 or 11 B + ion is used as the impurity ion, it can be formed under the conditions of 1 to 2 OKe V as the implantation energy and LX 10 15 to 1 ⁇ 10 16 cm " 2 as the implantation amount. Note that the surface layer in the shallow ueno region under the gate electrode functions as a channel region.
- the source region and the drain region may include an LDD (Lightly Doped Drain) region on the gate electrode side.
- the LDD region can be formed in a self-aligned manner by, for example, implanting impurity ions of a conductivity type opposite to that of the shallow gate region using the gate electrode as a mask.
- the source region and The drain region may be formed in a self-aligned manner by forming a sidewall spacer on the side wall of the gate electrode after forming the LDD region, and ion-implanting the gate electrode and the sidewall spacer as a mask. it can.
- the implantation energy is 3 to: LO OKeV, and the implantation amount is 5 ⁇ 10 13 to l ⁇ 10 ′′ cm. - 2 conditions or when using the 11 B + ions as impurity ions, can be formed in. 1 to 20 K e V, injection volume as 1 X 10 13 ⁇ 5X 10 14 cm- 2 conditions as implantation energy .
- the source layer, the drain region, and the gate electrode are silicided in order to lower their resistance and to improve the conductivity with the wiring connected thereto.
- the gate electrode and the shallow well region are electrically connected in the gate-substrate connection region.
- the silicide include tungsten silicide and titanium silicide.
- the source region and the drain region may be of a stacked type (see JP-A-2000-82815). In this case, the area of the source region and the drain region can be reduced, and high integration can be achieved.
- active impurity annealing of impurities is performed.
- the activation annealing is performed under such conditions that the impurities are sufficiently activated and the impurities are not excessively diffused. For example, if the N-type impurity is 75 A s + and the P-type impurity is 11 B + , after injecting 75 A s +, anneal for about 10 to 100 minutes at 800 to 1000 ° C and then 11 B + After injection, it can be annealed at 800-1000 ° C for 10-100 seconds. Note that, in order to make the impurity profiles in the shallow well region and the deep ueno region gentle, annealing may be separately performed before implanting the impurity in the source region and the drain region.
- a semiconductor device can be formed by forming wirings and the like by a known method.
- the substrate bias variable transistors 25 and 26 and the 13 TMOSs 27 and 28 are formed for convenience of description, but ordinary MOS FETs may be mixed.
- a DTMOS and a normal MOSFET may be used.
- the potential of a shallow U-B region may be fixed in a device to be a normal MOSFET.
- the semiconductor device of the first embodiment not only can a plurality of N-type substrate bias variable transistors 26, 26,... A plurality of P-type substrate bias variable transistors 25, 25,... Circuit blocks can also be formed. Therefore, for each of the N-type and P-type circuit blocks, the circuit blocks to be set to the active state and the circuit blocks to be set to the stand-by state can be appropriately separated, and the power consumption of the semiconductor device can be reduced. Can be.
- the P-type semiconductor substrate 11 is used in the first embodiment, the same operation and effect can be obtained even if the conductivity type of each well region is reversed by using an N-type semiconductor substrate. .
- FIG. 2 is a sectional view of a semiconductor device according to a second embodiment of the present invention.
- the gate insulating film, gate electrode, source region, drain region, interlayer insulating film, and upper metal wiring are omitted.
- the same components as those shown in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and description thereof will be omitted.
- the semiconductor device according to the second embodiment is different from the semiconductor device according to the first embodiment in that a P-type impurity region 35 is provided at a location where the N-type deep well regions 12 and 12 are separated. . Since the impurity concentration of the P-type impurity region 35 is higher than the impurity concentration of the P-type substrate 11, punch-through between the N-type deep well regions 12, 12 can be effectively suppressed. Therefore, the margin for electrically isolating the N-type deep ueno regions 12 and 12 can be reduced.
- the procedure for creating the semiconductor device according to the second embodiment differs from the procedure for creating the semiconductor device according to the first embodiment. The only difference is that the number of steps for forming the P-type impurity region 35 increases.
- the P-type impurity region 35 is for isolating the N-type deep peg regions 12 and 12, the P-type impurity region 35 should have the same depth as the N-type deep peg region 12. I like it. To this end, it is preferable to increase the number of photomasks for forming the P-type impurity region 35 by one.
- the impurity implantation for forming the P-type impurity region 35 is performed, for example, when 11 B + ions are used as impurity ions, the implantation energy is 100 to 1500 KeV, and the implantation amount is SXl. OU l X l OM cm—Can be formed under the conditions of 2 .
- the P-type impurity region 35 it is preferable to perform a shallow impurity implantation subsequent to the above-described impurity implantation (a two-stage implantation) in order to obtain a sufficient impurity concentration in a region near the substrate surface.
- a shallow impurity implantation subsequent to the above-described impurity implantation (a two-stage implantation) in order to obtain a sufficient impurity concentration in a region near the substrate surface.
- this shallow well implantation can be formed under the conditions of 60-500 KeV as the implantation energy and SX10U1X10 cm- 2 as the implantation amount.
- the impurity implantation step of the P-type shallow p-type region 15 can also serve as this shallow impurity implantation. In that case, the number of impurity implantation steps can be reduced by one.
- the formation of the P-type impurity region 35 suppresses the punch-through between the N-type deep wafer regions 12 and 12. Therefore, compared with the semiconductor device of the first embodiment, the margin between the N-type deep peg regions 12 and 12 is reduced, and the degree of integration can be improved.
- FIG. 3 is a sectional view of a semiconductor device according to a third embodiment of the present invention.
- the gate insulating film, the gate electrode, the source region, the drain region, the interlayer insulating film, and the upper metal wiring are omitted.
- the same components as those shown in FIG. 2 are denoted by the same reference numerals as those in FIG. 2, and detailed description thereof will be omitted.
- the semiconductor device of the third embodiment differs from the semiconductor device of the second embodiment only in the following points.
- An element isolation region 161 having a width wider than that of the above-described element isolation region 16 is provided at a position where a P-type impurity region 35 for preventing the formation is formed.
- the parasitic capacitance between the well region (silicon substrate) and the gate wiring or metal wiring can be reduced.
- the shallow impurity implantation performed when forming the P-type impurity region 35 becomes unnecessary, and one impurity implantation is sufficient.
- a wide element isolation region 162 is provided in a place other than the place where the P-type impurity region 35 is formed. The width of the element isolation region 162 is set as follows.
- the conductivity type of the deep-level regions 12 and 13 is different on both sides of the element isolation region 16 2, for example, at the boundary between the N-type DTMOS 27 and the N-type substrate bias variable transistor 26,
- the N-type DTMOS 27 has a deep p-type region 12 on the side of the N-type
- the N-type substrate bias variable transistor 26 has a deep p-type region 13 and 12 on the side of the P-type ZN type laminated structure.
- the N-type deep well region 12 on the deep side of the P-type / N-type stacked structure has no effect from the viewpoint of element isolation, the deep wafers 1 on both sides of the element isolation region 16 2 It can be said that the conductivity types of the ⁇ 1 regions 12 and 13 are opposite.
- the conductivity types of the shallow Ueno regions 14 and 15 on both sides of the element isolation region 16 2 are opposite, the conductivity of the deep gall regions 12 and 13 on both sides of the element isolation region 16 2 If the types are opposite, and the shallow gel regions 12 and 13 on both sides of the isolation region 16 2 have opposite conductivity types In the case where the conductive types of the deep ueno regions 12 and 13 are also opposite, the width of the element isolation region 16 2 needs to be wide enough to prevent the above-described punch-through and threshold value change. .
- the impurities even if the impurity implantation range in the deep well region is made extremely shallow, about 0.3 / m, the impurities also spread in the lateral direction during implantation, and further in the lateral direction due to the subsequent heat diffusion. Spread. Even under the above implantation conditions, when the width of the element isolation region was less than 0.18 / m, the change in threshold value could not be suppressed. When the width of the element isolation region is 0.7 nm or more, the margin required for element isolation cannot be ignored. Therefore, the width of the element isolation region 162 is preferably set to 0.18 to 0.7 ⁇ so that the above-described punch-through and the change in the threshold do not occur.
- the conductivity type of the shallow well region 14 or 15 is the same, and the conductivity type of the deep well region 12 or 13 is the same (shallow or gail region).
- the conductivity type of the deep eno region may be different
- the width of the element isolation region 16 can be, for example, 0.05 to 0.35 ⁇ .
- the wide element isolation region 16 1 is provided on the ⁇ -type impurity region 35 for separating the ⁇ -type deep peg regions 12 and 12.
- the parasitic capacitance can be reduced. Therefore, the speed of the circuit can be increased or the power consumption can be reduced.
- the impurity implantation step for forming the ⁇ -type impurity region 35 can be simplified. Therefore, manufacturing costs can be reduced.
- the semiconductor devices of the first to third embodiments have the following problems.
- the circuit block of No. 6 is integrated with the rectangular deep well region 12 in the circuit block of DTMOS 27, 28. Therefore, when the active / standby switching is performed in the circuit block of the substrate bias variable transistor 25 of ⁇ , the bias of the entire ⁇ deep region 12 changes, A large amount of charge is charged and discharged. As a result, power consumption increases. Further, in the semiconductor devices of the first to third embodiments, when the P-type substrate bias variable transistor 25 is activated (ie, when a potential lower than the power supply voltage is applied to the N-type deep well region 12), the latch There is a possibility that the up phenomenon is easily induced.
- P-type DTMOS 28 N-type shallow eno l ⁇ g region 14, P-type deep gel region 13, N-type deep eno! ⁇
- the bias below ground potential is applied to the N-type shallow Ueno region 14 of the P-type DTMOS 28 Consider what happens (undershoot).
- the gate electrode is electrically connected to the shallow Ueno 1 ⁇ 1 regions 15 and 14, so the N-type shallow Ueno region 14 of the P-type DTMOS 28 is biased below the ground potential through the gate electrode. sell.
- a forward voltage is applied to the junction between the n-type shallow U-region 14 of the p-type DTMOS 28 and the deep p-type region 13 of the p-type. Is injected with electrons. The electrons injected into the P-type deep well region 13 reach the N-type deep well region 12 and lower the potential of the N-type deep ueno region 12. When the potential of the N-type deep ueno region 12 decreases, holes are injected from the P-type shallow well region 15 of the N-type DTMOS 27 into the N-type deep ueno region 12. The holes injected into the N-type deep nano area 12 reach the P-type deep ueno area 13 and the P-type deep ueno!
- the latch-up phenomenon can be easily induced.
- the junction of the P-type shallow peg region 15 of the N-type DTMOS 27 with the N-type deep drape 1 shell region 12 and the P-type deep duck region 1 A large reverse bias is applied to the junction between 3 and the N-type deep enamel region 12. Therefore, punch-through occurs between the P-type shallow p-type region 15 and the P-type deep p-type region 13 of the N-type DTMOS 27, which leads to a latch-up phenomenon in the NPNP structure.
- An NP structure and the like are also included. As described above, when the bias of the N-type deep peg region 12 is largely changed, it becomes difficult to control the latch-up phenomenon. For this reason, the reliability of the device is reduced.
- Embodiment 4 of the present invention solves the above problem, and will be described with reference to FIGS.
- FIGS. 4 and 5 are cross-sectional views of a semiconductor device according to the fourth embodiment of the present invention.
- the interlayer insulating film and the upper metal wiring are omitted.
- FIG. 6 is a schematic plan view.
- the semiconductor device shown in FIG. 4 differs from the semiconductor device shown in FIGS. 1 to 3 in the following points. That is, the N-type deep well region 12 in the circuit block of the P-type substrate bias variable transistors 25, 25,.
- an element isolation region 165 is provided at a location where the N-type deep peg regions 12 and 12 are isolated.
- the location where the N-type deep layer is divided into the gate regions 12 and 12 is that the input potential from the well-bias input terminal 29 to the P-type substrate bias variable transistor 25 is the N-type substrate bias variable transistor 26, 26, It is preferable not to reach the circuit block and DTMOS section.
- an N-type deep cell region 12 The location where 1 is divided is the boundary between the circuit block of the P-type substrate bias variable transistor 25 and the circuit block of the N-type substrate bias variable transistor 26 or the N-type substrate bias variable transistor 26 It is preferable to set the boundary between the circuit block and the DTMOS section.
- FIG 5 shows a cross section of the boundary between the circuit block of the P-type substrate bias variable transistor 25 and the N-type DTMOS section (the area including the N-type DTMOS27).
- the boundary between the circuit block of the P-type substrate bias variable transistor 25 and the P-type DTMOS section (the area including the P-type DTMOS 27) is the circuit of the P-type substrate bias variable transistor 25. This is similar to the boundary between the block and the circuit block of the N-type board bias variable transistor 26.
- the block 53 composed of a P-type substrate bias variable transistor is connected to another block 53 composed of another P-type substrate bias variable transistor by an upper wiring 57 connecting the common well region of the substrate bias transistor. .
- the blocks 53 and 53 composed of P-type substrate bias variable transistors connected to each other in this manner become one circuit block (consisting of P-type substrate bias variable transistors).
- a power supply voltage or a voltage lower than the power supply voltage is supplied from the bias generation circuit to the common pail region of this circuit block when active, and a voltage higher than the power supply voltage during standby.
- Block 54 consisting of an N-type substrate bias variable transistor is an N-type substrate bias.
- the upper wiring 57 connecting the common transistors of the ground transistors is connected to a block 54 composed of another N-type substrate bias variable transistor.
- the blocks 54, 54 of N-type variable body bias transistors thus connected together constitute one circuit block (comprising of N-type variable body bias transistors).
- 0 V or a positive voltage is supplied from the bias generation circuit at the time of active, and a negative voltage is supplied at the time of standby.
- CMOS complementary MOS
- the procedure for fabricating the semiconductor device of the fourth embodiment is the same as that for fabricating the semiconductor device of the first embodiment.
- the case of forming a deep ueno region of the semiconductor device shown in FIG. 4 will be described with reference to FIGS. 7 and 8.
- FIG. 7 The case of forming a deep ueno region of the semiconductor device shown in FIG. 4 will be described with reference to FIGS. 7 and 8.
- FIG. 7 The case of forming a deep ueno region of the semiconductor device shown in FIG. 4 will be described with reference to FIGS. 7 and 8.
- an N-type deep wafer region 12a is formed on the semiconductor substrate 11 using the photoresist 33 as a mask.
- 31 P + is given as an impurity ion that gives N-type.
- the implantation energy is 500 to 3000 KeV, and the implantation amount is 5 to 10 "to 1 to 1
- 11 B + is given as an example of an impurity ion that gives a P-type.
- 11 B + ions when used as impurity ions, they can be formed under the conditions of an implantation energy of 10 ° to 1000 KeV and an implantation amount of 5 ⁇ 10 11 to: LX 10 14 cnT 2 .
- an N-type deep well region 12b is formed.
- the depth of impurity implantation in the deep N-type region 12b is shallower than that in the deep H-type region 12a of the N-type, and is about the same as that in the deep region 13 of the P-type. It is preferably a degree.
- 31 P + is given as an impurity ion that gives N-type.
- the region 12a and the region 12b are united to form an N-type deep region. Further, if the region 12b is divided (masked with the photoresist 34 so as not to implant impurities), the N-type deep well region can be electrically isolated.
- the N-type deep well region 12 is electrically separated by a semiconductor substrate (having a P-type conductivity type) 11.
- a semiconductor substrate having a P-type conductivity type
- the impurity concentration of the semiconductor substrate 11 is low (about 10 15 cmf 3 )
- the lithography mask is increased by one and the N-type P-type impurities may be implanted between deep gaps / regions 12 and 12.
- MOSFETs of normal structure may be mixed.
- the potential of a shallow gate / region should be fixed in the element to be a normal MOSFET.
- the shallow well regions 15 and 14 of the DTMOS 27 and 28 are formed by the opposite conductive type deep layers, the well regions 12 and 13 and the device isolation region 162. Are electrically isolated from each other. Further, the common holes 12 and 14 of the P-type substrate bias variable transistor 25 are electrically isolated for each circuit block by the element isolation region 165 and the P-type semiconductor region 11. Furthermore, the common peg regions 13 and 15 of the N-type substrate bias variable transistor 26 are electrically isolated for each circuit block by the element isolation regions 162 and 165 and the N-type deep peg region 12.
- any number of circuit blocks of the substrate bias variable transistors 25 and 26 can be formed for each conductivity type. This allows the circuit block to be activated and the standby state Therefore, the power consumption of the semiconductor device can be reduced.
- the common well regions 12 and 14; 13 and 15 of the substrate bias variable transistors 25 and 26 can be reduced to about the area of the circuit block of the substrate bias variable transistors 25 and 26. Therefore, in the semiconductor device according to the fourth embodiment, the charge and discharge of the electric charge when the potential of the common diode 1 page area of the substrate bias variable transistors 25 and 26 changes is reduced. Thus, power consumption of the semiconductor device can be reduced.
- the semiconductor device of Embodiment 4 in the block of the N-type substrate bias variable transistor 26 and the block of DTMOS 27, 28, the N-type deep well region 12 Is fixed. Therefore, control of the latch-up phenomenon becomes easy. Thereby, the reliability of the semiconductor device is improved.
- CMOS circuit can be formed by using any of the semiconductor devices according to the first to fourth embodiments.
- DTMOS which can provide high drive current with low voltage drive
- substrate bias variable transistor which can minimize the off-frequency current
- low power consumption and high-speed CMOS A circuit can be realized.
- the power consumption of the CMOS circuit can be further reduced.
- the semiconductor device according to any one of Embodiments 1 to 5 can be used for a battery-driven portable electronic device, particularly a portable information terminal.
- the portable electronic device include a portable information terminal, a mobile phone, and a game device.
- Figure 9 shows an example of a mobile phone.
- the semiconductor device of the present invention is incorporated in the control circuit 111.
- the control circuit 111 may be composed of an LSI (large-scale integrated circuit) in which a logic circuit including the semiconductor device of the present invention and a memory are mixed.
- 1 1 2 is a battery
- 1 1 3 is an RF (radio frequency) circuit section
- 1 1 4 is a display section
- 1 15 is an antenna unit
- 1 16 is a signal line
- 1 17 is a power line.
- the semiconductor device of the present invention in a portable electronic device, it is possible to greatly reduce the power consumption of the LSI section while maintaining the function and operation speed of the portable electronic device. This can significantly extend battery life.
- the semiconductor device of the present invention is a semiconductor device including a DTMOS and a variable substrate bias transistor, which electrically separates a deep Ueno region having a conductivity type opposite to that of the semiconductor substrate.
- a plurality of circuit blocks of the substrate bias variable transistor can be formed for each of the different conductivity types. Therefore, for any conductivity type, a circuit block to be activated and a circuit block to be placed in the standby state can be appropriately divided, and the power consumption of the semiconductor device can be reduced.
- the deep well region in the circuit block including the substrate bias variable transistor and the other element portions are used. It is electrically isolated from the deep well region. Therefore, it is possible to reduce the parasitic capacitance due to the PN junction at the boundary of the deep Ueno 1 ⁇ 1 region, and it is possible to reduce the power consumption of the semiconductor device. Furthermore, since the potential of the deep wafer region in the DTMOS portion can be fixed, it is possible to suppress the latch-up phenomenon.
- the conductivity type of the shallow eno-S region on one side of the element isolation region and the conductivity type of the shallow eno-region on the other side are different. If the conductivity type of the deep gall region on one side of the region is different from the conductivity type of the deep gall region on the other side, the width of the element isolation region is the same as the conductivity type of the shallow Ueno region on both sides, and The width of the deep isolation region on both sides is wider than that of the element isolation region having the same conductivity type. Therefore, it is possible to suppress punch-through between the well regions and shift of the threshold value of the element due to diffusion of impurities.
- the portable electronic device of the present invention incorporates the above-described semiconductor device of the present invention, the power consumption of the LSI section can be significantly reduced, and the battery life can be greatly extended.
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Description
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EP01271852A EP1357598A4 (en) | 2000-12-26 | 2001-12-21 | SEMICONDUCTOR DEVICE AND PORTABLE ELECTRONIC DEVICE |
US10/451,744 US7084465B2 (en) | 2000-12-26 | 2001-12-26 | Semiconductor device having device isolation region and portable electronic device |
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JP2000395472A JP2002198439A (ja) | 2000-12-26 | 2000-12-26 | 半導体装置および携帯電子機器 |
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WO2004017395A1 (en) | 2002-08-14 | 2004-02-26 | Advanced Analogic Technologies, Inc. | Isolated complementary mos devices in epi-less substrate |
US7307334B2 (en) * | 2004-07-29 | 2007-12-11 | Nxp B.V. | Integrated circuit having features to limit substrate current |
CN102202609A (zh) * | 2008-10-30 | 2011-09-28 | 艾克希罗斯有限公司 | 管状可植入式线 |
EP2421040A1 (en) * | 2002-09-29 | 2012-02-22 | Advanced Analogic Technologies, Inc. | A modular bipolar-CMOS-DMOS analog integrated circuit and power transistor technology |
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US7445979B2 (en) | 2002-08-14 | 2008-11-04 | Advanced Analogic Technologies, Inc. | Method of fabricating isolated semiconductor devices in epi-less substrate |
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Also Published As
Publication number | Publication date |
---|---|
JP2002198439A (ja) | 2002-07-12 |
KR20030064872A (ko) | 2003-08-02 |
EP1357598A4 (en) | 2007-10-10 |
US20040079999A1 (en) | 2004-04-29 |
TW515083B (en) | 2002-12-21 |
EP1357598A1 (en) | 2003-10-29 |
US7084465B2 (en) | 2006-08-01 |
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