WO2007096996A1 - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
- Publication number
- WO2007096996A1 WO2007096996A1 PCT/JP2006/303469 JP2006303469W WO2007096996A1 WO 2007096996 A1 WO2007096996 A1 WO 2007096996A1 JP 2006303469 W JP2006303469 W JP 2006303469W WO 2007096996 A1 WO2007096996 A1 WO 2007096996A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- silicon substrate
- gettering layer
- semiconductor device
- dissolved oxygen
- main surface
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 62
- 239000004065 semiconductor Substances 0.000 title claims description 46
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 166
- 239000010703 silicon Substances 0.000 claims abstract description 166
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 165
- 239000000758 substrate Substances 0.000 claims abstract description 160
- 238000005247 gettering Methods 0.000 claims abstract description 112
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 58
- 239000001301 oxygen Substances 0.000 claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 claims abstract description 52
- 239000012535 impurity Substances 0.000 claims description 43
- 229910052751 metal Inorganic materials 0.000 claims description 34
- 239000002184 metal Substances 0.000 claims description 34
- 238000009792 diffusion process Methods 0.000 claims description 13
- 238000005468 ion implantation Methods 0.000 claims description 10
- 229910021480 group 4 element Inorganic materials 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 235000012431 wafers Nutrition 0.000 description 31
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 25
- 229910052698 phosphorus Inorganic materials 0.000 description 25
- 239000011574 phosphorus Substances 0.000 description 25
- 229910001385 heavy metal Inorganic materials 0.000 description 16
- 230000000694 effects Effects 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 229910052814 silicon oxide Inorganic materials 0.000 description 11
- 238000012986 modification Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 5
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 2
- 239000005360 phosphosilicate glass Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 101100520660 Drosophila melanogaster Poc1 gene Proteins 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 101100520662 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) PBA1 gene Proteins 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
Classifications
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/322—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to modify their internal properties, e.g. to produce internal imperfections
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/322—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to modify their internal properties, e.g. to produce internal imperfections
- H01L21/3221—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to modify their internal properties, e.g. to produce internal imperfections of silicon bodies, e.g. for gettering
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/06—Silicon
-
- 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66234—Bipolar junction transistors [BJT]
- H01L29/66325—Bipolar junction transistors [BJT] controlled by field-effect, e.g. insulated gate bipolar transistors [IGBT]
- H01L29/66333—Vertical insulated gate bipolar transistors
- H01L29/66348—Vertical insulated gate bipolar transistors with a recessed gate
-
- 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
- H01L29/70—Bipolar devices
- H01L29/72—Transistor-type devices, i.e. able to continuously respond to applied control signals
- H01L29/739—Transistor-type devices, i.e. able to continuously respond to applied control signals controlled by field-effect, e.g. bipolar static induction transistors [BSIT]
- H01L29/7393—Insulated gate bipolar mode transistors, i.e. IGBT; IGT; COMFET
- H01L29/7395—Vertical transistors, e.g. vertical IGBT
- H01L29/7396—Vertical transistors, e.g. vertical IGBT with a non planar surface, e.g. with a non planar gate or with a trench or recess or pillar in the surface of the emitter, base or collector region for improving current density or short circuiting the emitter and base regions
- H01L29/7397—Vertical transistors, e.g. vertical IGBT with a non planar surface, e.g. with a non planar gate or with a trench or recess or pillar in the surface of the emitter, base or collector region for improving current density or short circuiting the emitter and base regions and a gate structure lying on a slanted or vertical surface or formed in a groove, e.g. trench gate IGBT
Definitions
- the present invention relates to a semiconductor device and a manufacturing method thereof, and more particularly to a semiconductor device using a high resistivity silicon substrate which is a power semiconductor element material and a manufacturing method thereof.
- the (Floating Zone) method is widely used. Silicon wafers manufactured by these methods are used for manufacturing various semiconductor devices.
- oxygen is taken into the wafer by a high-temperature oxidative diffusion process. These oxygens remain inside the wafer as dissolved oxygen.
- the dissolved oxygen is thermally donated in the low-temperature heat treatment process of the semiconductor device manufacturing process, and changes the resistivity of the silicon substrate. Therefore, it is desirable to minimize the dissolution of oxygen into the silicon substrate during the wafer processing and the semiconductor device manufacturing process (see, for example, Patent Document 1).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2005-145744
- the present invention has been made to solve the above-described problems. Even if the dissolved oxygen concentration in the silicon wafer is high to some extent before the device manufacturing process is started, good element characteristics are obtained. The object is to suppress variation in the characteristics of the element while obtaining it.
- a semiconductor device includes a silicon substrate having a first surface and a second surface, formed by a floating zone method or a magnetic field pulling method, and the first surface.
- a method of manufacturing a semiconductor device includes a first surface and a second surface, and the second surface of a silicon substrate formed by a floating zone method or a magnetic field application pulling method, A step of forming a gettering layer that captures dissolved oxygen or residual metal in the silicon substrate; a step of heat-treating the silicon substrate; and a step of removing at least a part of the gettering layer.
- FIG. 1 shows a method for manufacturing a semiconductor device according to a first embodiment.
- FIG. 2 is a diagram showing the concept of gettering of metals and dissolved oxygen.
- FIG. 3 shows a method for manufacturing a semiconductor device according to the second embodiment.
- FIG. 4 shows a method for manufacturing a semiconductor device according to the third embodiment.
- FIG. 5 shows a method for manufacturing a semiconductor device according to the fourth embodiment.
- FIG. 6 shows a method for manufacturing a semiconductor device according to the fifth embodiment.
- FIG. 7 is a view showing a modification of the method for manufacturing a semiconductor device according to the fifth embodiment.
- FIG. 8 is a view showing a modification of the semiconductor device according to the first to fifth embodiments.
- FIG. 9 is a view showing a modification of the semiconductor device according to the first to fifth embodiments. Explanation of symbols
- the semiconductor device used here is manufactured by the floating zone method (Floating Zone method; hereinafter referred to as “FZ method”) or the magnetic field applied Czochralski (hereinafter referred to as “MCZ method” t). It is formed using a silicon substrate (silicon wafer).
- FZ method floating Zone method
- MCZ method magnetic field applied Czochralski
- the silicon substrate has a first surface (first main surface) and a second surface (second main surface), and an element such as a transistor is formed on the first main surface side after the device manufacturing process. It is formed. An n-type impurity is added to this silicon substrate. In addition, this substrate contains a predetermined concentration of dissolved oxygen.
- a silicon oxide film 2 is formed on the first main surface of the silicon substrate 1.
- phosphorus is diffused into the second main surface of the silicon substrate 1, thereby The impurity layer 3 is formed. Further, this impurity layer is heat-treated. In this manner, the gettering layer 3a is formed on the second main surface of the silicon substrate 1 as shown in FIG.
- the force gettering layer 3a described later can capture dissolved oxygen or residual metal in the silicon substrate 1.
- phosphine As a method for diffusing phosphorus, phosphine (PH) is used as a gas source.
- BP phosphorous boron
- the impurity layer 3 may be formed by phosphorus ion implantation. By forming the impurity layer 3 by diffusion of phosphorus or ion implantation of phosphorus, the gettering layer 3a can have a desired concentration profile.
- the oxidation rate of a region containing phosphorus at a high concentration is higher than that of a region not containing phosphorus. This rate depends on the oxidation conditions, but when the phosphorus concentration is 1 ⁇ 10 18 at oms / cm 2 or more, accelerated acidification occurs, and the oxidation rate becomes 3 to 5 times. When the phosphorus concentration is IX 10 19 atoms / cm 2 or more, the oxidation rate can increase by an order of magnitude or more.
- the number of atoms in the solid in lcm -3 of the silicon oxide film is about 5 X 10 22 (atoms / cm 3 ), of which about 1.5 X 10 22 (atoms / cm 3 ).
- X 10 22 atoms / cm 3
- the impurities contained in the gettering layer 3a are not limited to phosphorus, and may be other n-type impurities such as arsenic and antimony. Further, p-type impurities such as boron, aluminum, and gallium may be used. Furthermore, the impurities contained in the gettering layer 3a may be Group 4 elements such as silicon, germanium, and carbon, or neutral elements such as argon and helium.
- a gettering layer can be formed by diffusing the above-described impurities into the silicon substrate 1. Further, the above-described impurities may be ion-implanted into the silicon substrate 1, and the silicon substrate may be heat-treated. A gettering layer can also be formed by this method.
- a p-type diffusion layer 4 is formed as a first conductive region on the first main surface of the silicon substrate 1.
- a thermal diffusion process is performed.
- dissolved oxygen in the silicon substrate 1 is captured by the gettering layer 3a.
- the concentration of dissolved oxygen in the silicon substrate 1 can be reduced.
- the silicon substrate 1 is heat-treated to perform the gettering of the dissolved oxygen.
- dissolved oxygen contained in the silicon substrate 1 is captured by the gettering layer 3a.
- the concentration of dissolved oxygen contained in the silicon substrate 1 can be reduced.
- not only dissolved oxygen contained in the silicon substrate 1 but also residual metals in the silicon substrate 1 are captured by the gettering layer 3a.
- a trench gate structure for example, an insulated gate bipolar transistor (hereinafter referred to as “IGBT”) gate is formed on the first main surface of the silicon substrate 1.
- 5 First electrode
- a metal wiring 6 made of A1 or the like is formed on the first main surface of the silicon substrate 1.
- the gettering layer 3a contains phosphorus. Phosphorus has the property of aggregating metals by diffusive transport in solids. For this reason, even when heavy metal such as Fe has diffused into the silicon substrate 1, the gettering layer 3a can capture the heavy metal. As a result, it is possible to prevent the carrier life of current carriers (holes and electrons) in the silicon substrate 1 from being shortened. In addition, the leakage current when maintaining the withstand voltage can be kept small.
- the second main surface of the silicon substrate 1 is mechanically ground to remove a portion below the dotted line 7 of the silicon substrate 1.
- all the gettering layers 3a are removed, and the structure shown in FIG. 1 (f) is obtained.
- the step of removing the gettering layer 3a may be removed by a chemical method such as dry etching or wet etching. At this time
- a trace portion (not shown) remains after the gettering layer 3a is removed.
- the concentration of heavy metals and dissolved oxygen contained in the silicon substrate 1 can be reduced. This can prevent an increase in junction leakage current due to heavy metals in the silicon substrate. In addition, fluctuations in resistivity of the silicon substrate 1 due to dissolved oxygen can be suppressed.
- an n-type buffer layer containing an n-type impurity is formed on the second main surface of the silicon substrate 1 so as to cover a trace portion obtained by removing the gettering layer 3a.
- Form 8. For example, it is formed by phosphorus ion implantation and heat treatment.
- a p-type collector layer 9 containing a p-type impurity is formed as a second conductive region so as to cover the n-type buffer layer 8. For example, it is formed by boron ion implantation and heat treatment.
- the silicon substrate 1 is heat-treated so that dissolved oxygen and residual metal contained in the silicon substrate 1 are captured by the gettering layer 3a. Thereafter, metal wiring (aluminum wiring) 6 was formed, and the gettering layer 3a was removed. Thereafter, a second conductive region (p-type collector layer 9) was formed.
- the step of heat-treating the silicon substrate 1 and the gettering layer 3 Between the step of removing a, the step of forming the metal wiring 6 on the first main surface of the silicon substrate 1 was performed. Further, after the step of removing the gettering layer 3a, the second conductive region is formed on the second main surface of the silicon substrate 1. In the step of forming the second conductive region, an impurity layer is formed on the second main surface side of the silicon substrate 1 by ion implantation or the like, and then the temperature is lower than the melting point of the metal wiring (aluminum wiring) 6 (300 ° C. The impurity layer is activated by performing heat treatment ( ⁇ 450 ° C.).
- the silicon substrate 1 having the first surface (first main surface) and the second surface (second main surface) and formed by the FZ method or the MCZ method, 1 First conductive region (P-type diffusion layer 4) provided on the main surface and at least a part of the gettering layer provided on the second main surface and capturing dissolved oxygen or residual metal in the silicon substrate 1
- P-type diffusion layer 4 1 First conductive region provided on the main surface and at least a part of the gettering layer provided on the second main surface and capturing dissolved oxygen or residual metal in the silicon substrate 1
- a second conductive region (p-type collector layer 9) that covers the trace portion is provided on the second main surface of the semiconductor device. That is, the structure shown in FIG. 1 (g) is a vertical device structure composed of a first conductive region (p-type diffusion layer 4), a silicon substrate 1, and a second conductive region (p-type collector layer 9). .
- the carrier lifetime of the trace portion described above is shorter than the carrier lifetime of the portion other than the trace portion of the silicon substrate 1. Specifically, the carrier life of the trace portion is less than one tenth of the carrier life of the portion other than the trace portion of the silicon substrate 1. This trace portion can be used as a local carrier lifetime control layer in the silicon substrate 1.
- a gettering layer 3a is formed on the second main surface of the silicon substrate 1 (left side of FIG. 2A).
- the gettering layer 3a aggregates and captures (getters) the heavy metal 10 by diffusion transport, as shown in FIG. 2 (a).
- dissolved oxygen in silicon substrate 1 is gettering layer. Segregates on the surface of 3a.
- the silicon oxide film 3b is formed on the surface of the gettering layer 3a. In this way, the heavy metal and dissolved oxygen gas in the silicon substrate is obtained. The scattering is performed.
- the manufacturing cost can be reduced.
- the degree of freedom of application of the silicon substrate can be increased by controlling the dissolved oxygen concentration in the device manufacturing process. In other words, even if the dissolved oxygen concentration in the silicon wafer is high to some extent before starting the device manufacturing process, good device characteristics can be obtained according to the device application, and variation in device characteristics can be suppressed. It is out.
- the gettering layer 3a is formed after the start of the device manufacturing process.
- the gettering layer may be formed before the start of the device manufacturing process, and after the dissolved oxygen is captured, the gettering layer may be removed. This makes it possible to reduce the dissolved oxygen concentration in advance before the start of the device manufacturing process.
- a gate 5 having a trench gate structure is formed on the first main surface side of the silicon substrate 1, and the n-type buffer layer 8 and the p-type are formed on the second main surface side of the silicon substrate 1.
- An example of forming the LPT (Light Punch Through) structure of the collector layer 9 was shown.
- a structure such as FS (Field Stop) and SPT (Soft Punch Throug h) similar to the LPT structure may be formed in addition to the LPT structure.
- an IEGT Injection Enhanced Gate Transistor
- a planar gate structure, or the like may be formed on the first main surface side of the silicon substrate 1 instead of the trench gate structure shown in FIG.
- a junction type thyristor In addition to the MOS gate structure, a junction type thyristor, a GTO (Gate Turn-Off) thyristor, a GCT (Gate Commutated Turn-off), or a SITh (Static Induction Thyristor) structure may be used. Also, it can have a control electrode! /, Or a simple diode structure!
- phosphorus is used as an impurity used when forming the gettering layer 3a.
- other elements may be used as long as they are impurities having a gettering effect on dissolved oxygen.
- the force p-type silicon substrate shown in the example using the n-type silicon substrate may be used, and all other conductivity types of p and n may be reversed.
- an intrinsic semiconductor (not including n-type or p-type impurities) power may be used as the silicon substrate.
- a method for manufacturing a semiconductor device according to the present embodiment will be described with reference to FIG. Here, the points different from the first embodiment will be mainly described.
- the process force for forming the silicon oxide film on the first main surface of the silicon substrate 1 is the same as that for forming the metal wiring 6 (FIGS. 3A to 3D). Step) is performed in the same manner as in the first embodiment.
- the second main surface of the silicon substrate 1 is mechanically ground to remove the portion below the dotted line 7 of the silicon substrate 1.
- a part of the gettering layer 3a is removed to leave a gettering layer having a predetermined thickness.
- the structure shown in FIG. 3 (f) is obtained.
- a p-type collector layer 9 containing a p-type impurity is formed on the second main surface of the silicon substrate 1 so as to cover the remaining gettering layer 3a.
- boron is ion-implanted into the second main surface of the silicon substrate 1 to perform heat treatment.
- the gettering layer 3a is removed so that the gettering layer 3a has a predetermined thickness. That is, in the first embodiment, the force for removing all of the gettering layer 3a In the second embodiment, only a part of the gettering layer 3a is removed. As a result, the step of forming n-type buffer layer 8 shown in the first embodiment can be omitted. Therefore, in addition to the effects of the first embodiment, the number of steps can be reduced.
- the gettering 3a is removed after the metal wiring 6 is formed.
- the gettering layer 3a is removed and the n-type buffer layer 8 and the p-type collector layer 9 are formed, and then the metal wiring 6 is formed.
- the process force for forming the silicon oxide film 2 on the first main surface of the silicon substrate 1 and the process up to the formation of the gate 5 are the same as in the first embodiment. Do the same.
- Fig. 4 (e ) The second main surface of the silicon substrate 1 is mechanically ground to completely remove the gettering layer 3a.
- FIG. 4 (f) the structure shown in FIG. 4 (f) is obtained.
- FIG. 4G an n-type buffer layer 8 and a p-type collector layer 9 are sequentially formed on the second main surface of the silicon substrate 1. These layers are formed by ion implantation and heat treatment, respectively. Further, a metal wiring 6 such as A1 is formed on the gate 5.
- the n-type buffer layer 8 and the p-type collector layer 9 are formed after removing all the gettering layers 3a.
- the gettering layer 3a is partially removed, the p-type collector layer 9 is formed so as to cover the remaining gettering layer 3a, and then the metal wiring 6 is formed. It ’s okay.
- the first Metal wiring 6 was formed on the main surface.
- the metal wiring 6 is formed on the first main surface of the silicon substrate 1. did. Thereby, the metal wiring 6 can be formed after the heat treatment for forming the p-type collector layer 9. For this reason, it is possible to prevent the metal wiring 6 from being subjected to high-temperature heat treatment. Therefore, in addition to the effects of the first and second embodiments, the device characteristics can be kept good.
- a heat treatment is applied before or after forming a contact hole in which a high breakdown voltage IGBT or the like of 2500 V or more is formed and the substrate is sufficiently thick after grinding the second main surface of the silicon substrate. Can be applied when
- the device characteristics can be kept good.
- a method for manufacturing a semiconductor device will be described with reference to FIG.
- a device manufacturing process is performed using a silicon substrate manufactured in advance by the FZ method or the MCZ method has been described.
- a gettering layer is formed on one surface of a silicon substrate before starting a device manufacturing process.
- a silicon ingot formed by the FZ method or the MCZ method is cut to form a wafer 12 having a predetermined thickness.
- the wafer has surfaces 14a and 14b.
- high-concentration phosphorus is diffused on these surfaces, and an impurity layer 3 is formed on each surface.
- These impurity layers may be formed by phosphorus ion implantation.
- a silicon oxide film containing phosphorus PSG; Phospho Silicate Glass
- the impurity layer 3 is heat-treated at a high temperature to diffuse the impurities (phosphorus).
- gettering layers 3a are formed on the surfaces 14a and 14b of the wafer 12, that is, on both surfaces of the wafer 12, respectively.
- These gettering layers are layers having a gettering effect with respect to dissolved oxygen in the heavy metal as in the first to third embodiments. These gettering layers are formed in a state where the solid solubility limit with respect to the silicon substrate is maintained.
- the wafer 12 is cut along a plane perpendicular to the thickness direction and divided into two wafers.
- a wafer 12a having the gettering layer 3a on the surface 14a and a wafer 14b having the gettering layer 3a on the surface 14b are formed.
- the surfaces 14c and 14d formed by cutting are mirror-finished. These surfaces can be used as the first main surface of the silicon substrate for forming a MOS gate element or the like.
- the gettering layer By forming the gettering layer as described above, the gettering layer can be simultaneously formed on the two wafers 12a and 12b. This makes it possible to halve the number of processed wafers in the process of forming the gettering layer as compared with the first to third embodiments.
- gettering is performed on both surfaces of a wafer having a predetermined thickness formed by the FZ method or the MCZ method.
- a wafering layer is formed, and the wafer is divided into two parts in a plane perpendicular to the thickness direction so as to obtain a silicon substrate having a gettering layer formed on one main surface side.
- elements such as MOS gates are formed in the same manner as in the first to third embodiments using the surface 14c of the wafer 12a and the surface 14d of the wafer 12b as the first main surface.
- Other configurations are the same as those in the first to third embodiments.
- a protective film such as a silicon oxide film may be formed on the surfaces of the surfaces 14 a and 14 b before the above-described step of forming the impurity layer (see FIG. 5B). good.
- phosphorus is used as an impurity contained in the gettering layer.
- an n-type impurity other than phosphorus, a p-type impurity, or the like may be used as long as it has a gettering effect for capturing heavy metals and dissolved oxygen.
- the number of processed wafers in the process of forming the gettering layer can be reduced. Therefore, the manufacturing cost can be reduced.
- a method of manufacturing the semiconductor device according to the present embodiment, particularly a PIN (Positive Intrinsic Negative) diode, will be described with reference to FIG.
- the steps from the step of forming the silicon oxide film 2 on the first main surface of the silicon substrate 1 to the step of forming the gettering layer 3a on the second main surface of the silicon substrate 1 are performed in the same manner as in the first embodiment (see FIGS. 1A to 1C).
- the gettering layer 3a has a gettering effect for capturing dissolved oxygen or heavy metals in the silicon substrate.
- a p-type impurity layer is formed on the first main surface of the silicon substrate 1 by boron ion implantation or the like, and heat treatment is performed.
- a p-type anode electrode 14 is formed on the first main surface of the silicon substrate 1 as shown in FIG. 6 (d).
- the second main surface of the silicon substrate 1 is mechanically ground to remove a portion below the dotted line 7 of the silicon substrate 1. As a result, all the gettering layers 3a are removed, and the structure shown in FIG. 6 (f) is obtained.
- an n-type impurity layer is formed on the second main surface of the silicon substrate 1. For example, it is formed by phosphorus ion implantation. Next, this impurity layer is heat-treated. As a result, an n-type force sword electrode 15 is formed on the second main surface of the silicon substrate 1 as shown in FIG. 6 (g).
- gettering layer 3 a is formed on the second main surface of silicon substrate 1, and after removing this layer, n-type force sword electrode 15 is formed on the second main surface of silicon substrate 1.
- ⁇ control control
- This control is equivalent to reducing the carrier lifetime of the ⁇ -type buffer layer 8 of the IGBT shown in the first to fourth embodiments.
- a ⁇ -type anode electrode 14 is provided on the first main surface of the silicon substrate 1, and a ⁇ -type force sword electrode 15 is provided on the second main surface of the silicon substrate 1.
- Structure. This structure is a vertical diode structure comprising an anode electrode 14, a silicon substrate 1, and a force sword electrode 15.
- the carrier life on the side of the force sword electrode 15 can be shortened by one digit or more than other regions. That is, in addition to the effects obtained in Embodiments 1 to 4, local carrier lifetime control ( ⁇ control) can be performed.
- ⁇ control local carrier lifetime control
- a silicon oxide film 2 is formed on the first main surface of the silicon substrate 1.
- a p-type impurity layer is formed on the first main surface of the silicon substrate 1 and the silicon oxide film 2 is removed.
- the impurity layer 3 is heat-treated to form a gettering layer 3a on the first main surface of the silicon substrate 1, as shown in FIG. 7 (c).
- the silicon substrate 1 is heat-treated. As a result, dissolved oxygen and residual metals in the silicon substrate 1 are captured by the gettering layer 3a.
- FIG. 7 (d) the portion above the dotted line 7 of the silicon substrate 1 is removed by grinding or the like. As a result, the gettering layer 3a is removed, and the structure shown in FIG. 7 (e) is obtained.
- FIG. 7 (f) a p-type impurity layer is formed on the first main surface of the silicon substrate 1, and heat treatment is performed to form the anode electrode 14. At this time, a pn junction having a breakdown voltage equal to or higher than a predetermined value is formed between the anode electrode 14 and the silicon substrate 1.
- silico An n-type impurity layer is formed on the second main surface of the silicon substrate 1, and heat treatment is performed to form a force sword electrode. As a result, a vertical device structure including the anode electrode 14, the silicon substrate 1, and the force sword electrode 15 is formed. A main current passing through the silicon substrate 1 flows between the anode electrode 14 and the force sword electrode 15.
- the manufacturing method of the modified example first, the first main surface of the silicon substrate 1 having the first main surface and the second main surface and formed by the FZ method or the MCZ method is placed on the silicon substrate 1 in the silicon substrate 1. A gettering layer for capturing dissolved oxygen or residual metal is formed. Next, the silicon substrate 1 is heat-treated, and gettering for capturing dissolved oxygen or the residual metal in the silicon substrate 1 is performed. Next, after removing the gettering layer, a first conductive type first conductive region is formed on the first main surface of the silicon substrate 1, and a second conductive type is formed on the second main surface of the silicon substrate 1. The process of forming the second conductive region is performed.
- the silicon substrate 1 having the first main surface and the second main surface and formed by the FZ method or the MCZ method, and the dissolved oxygen in the silicon substrate 1 provided on the first main surface Alternatively, a trace portion including a trace obtained by removing a gettering layer for capturing residual metal, a first conductive region of a first conductivity type provided on the first main surface and covering the trace portion, and a second conductive surface It is possible to obtain a semiconductor device that includes the second conductive region of the second conductivity type provided, and through which the main current passes between the first main surface and the second surface.
- a gate structure such as an IGBT is formed on the first main surface of the silicon substrate 1. It may be possible to form a structure.
- the structural examples in which the p-type diffusion layer 4 is provided on the first main surface side of the silicon substrate 1 containing n-type impurities are shown.
- an n-type impurity layer 16 having an n-type impurity concentration higher than that of the silicon substrate 1 may be provided below the p-type diffusion layer 4.
- the n-type buffer layer may not be provided on the second main surface side of the silicon substrate 1, and a structure may be used.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Planar Illumination Modules (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06714608A EP2006894B1 (en) | 2006-02-24 | 2006-02-24 | Method for producing a semiconductor device |
US12/159,787 US8329563B2 (en) | 2006-02-24 | 2006-02-24 | Semiconductor device including a gettering layer and manufacturing method therefor |
JP2008501549A JP5151975B2 (ja) | 2006-02-24 | 2006-02-24 | 半導体装置の製造方法 |
PCT/JP2006/303469 WO2007096996A1 (ja) | 2006-02-24 | 2006-02-24 | 半導体装置及びその製造方法 |
CN2006800532219A CN101385130B (zh) | 2006-02-24 | 2006-02-24 | 半导体装置及其制造方法 |
KR1020087018069A KR101023666B1 (ko) | 2006-02-24 | 2006-02-24 | 반도체장치 및 그 제조 방법 |
TW095111775A TW200733177A (en) | 2006-02-24 | 2006-04-03 | Semiconductor device and process for producing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2006/303469 WO2007096996A1 (ja) | 2006-02-24 | 2006-02-24 | 半導体装置及びその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007096996A1 true WO2007096996A1 (ja) | 2007-08-30 |
Family
ID=38437057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/303469 WO2007096996A1 (ja) | 2006-02-24 | 2006-02-24 | 半導体装置及びその製造方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8329563B2 (ja) |
EP (1) | EP2006894B1 (ja) |
JP (1) | JP5151975B2 (ja) |
KR (1) | KR101023666B1 (ja) |
CN (1) | CN101385130B (ja) |
TW (1) | TW200733177A (ja) |
WO (1) | WO2007096996A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008041836A (ja) * | 2006-08-03 | 2008-02-21 | Denso Corp | 半導体装置の製造方法 |
WO2011074237A1 (ja) * | 2009-12-16 | 2011-06-23 | 国立大学法人奈良先端科学技術大学院大学 | SiC半導体素子およびその作製方法 |
WO2013046977A1 (ja) * | 2011-09-28 | 2013-04-04 | 住友電気工業株式会社 | 炭化珪素半導体装置の製造方法 |
WO2014054121A1 (ja) * | 2012-10-02 | 2014-04-10 | 三菱電機株式会社 | 半導体装置、半導体装置の製造方法 |
JP2014075483A (ja) * | 2012-10-04 | 2014-04-24 | Sanken Electric Co Ltd | 半導体装置及び半導体装置の製造方法 |
JP2015041720A (ja) * | 2013-08-23 | 2015-03-02 | 富士電機株式会社 | 半導体装置の製造方法 |
JP2015233146A (ja) * | 2015-07-15 | 2015-12-24 | 三菱電機株式会社 | 半導体装置、半導体装置の製造方法 |
US9647094B2 (en) | 2013-08-02 | 2017-05-09 | University Of Kentucky Research Foundation | Method of manufacturing a semiconductor heteroepitaxy structure |
JP2018137454A (ja) * | 2015-06-17 | 2018-08-30 | 富士電機株式会社 | 半導体装置および半導体装置の製造方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8679962B2 (en) | 2008-08-21 | 2014-03-25 | Taiwan Semiconductor Manufacturing Company, Ltd. | Integrated circuit metal gate structure and method of fabrication |
US7989321B2 (en) * | 2008-08-21 | 2011-08-02 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor device gate structure including a gettering layer |
US8541305B2 (en) * | 2010-05-24 | 2013-09-24 | Institute of Microelectronics, Chinese Academy of Sciences | 3D integrated circuit and method of manufacturing the same |
CN101853878B (zh) * | 2010-06-03 | 2012-06-13 | 西安理工大学 | 一种pnp-沟槽复合隔离RC-GCT器件及制备方法 |
US20140360546A1 (en) * | 2013-06-08 | 2014-12-11 | Alphabet Energy, Inc. | Silicon-based thermoelectric materials including isoelectronic impurities, thermoelectric devices based on such materials, and methods of making and using same |
JP7083573B2 (ja) * | 2018-04-09 | 2022-06-13 | 株式会社ディスコ | ウェーハの加工方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5954230A (ja) * | 1982-09-21 | 1984-03-29 | Toshiba Corp | 半導体装置の製造方法 |
JPS62221122A (ja) * | 1986-03-24 | 1987-09-29 | Toshiba Corp | 半導体装置の製造方法 |
JPS63108729A (ja) * | 1986-10-24 | 1988-05-13 | Nec Corp | 半導体ウエ−フア |
JPS6412537A (en) * | 1987-07-07 | 1989-01-17 | Nec Corp | Formation of defective layer in semiconductor substrate |
JPH0738102A (ja) * | 1993-07-20 | 1995-02-07 | Fuji Electric Co Ltd | 高耐圧半導体装置の製造方法 |
JPH09260392A (ja) * | 1996-03-25 | 1997-10-03 | Toshiba Corp | 半導体装置およびその製造方法 |
JP2005145744A (ja) | 2003-11-13 | 2005-06-09 | Sumitomo Mitsubishi Silicon Corp | 高抵抗シリコンウェーハ |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5244163A (en) | 1975-10-03 | 1977-04-06 | Hitachi Ltd | Process for productin of semiconductor element |
JPS53130979A (en) | 1977-04-20 | 1978-11-15 | Nec Corp | Manufacture for semiconductor device |
JPS5414665A (en) | 1977-07-06 | 1979-02-03 | Hitachi Ltd | Color cathode-ray tube of post-stage focusing type |
JPS6089932A (ja) | 1983-10-21 | 1985-05-20 | Sony Corp | 半導体基体の処理方法 |
JPS6272132A (ja) | 1985-09-25 | 1987-04-02 | Nec Kansai Ltd | 半導体装置の製造方法 |
US5194395A (en) * | 1988-07-28 | 1993-03-16 | Fujitsu Limited | Method of producing a substrate having semiconductor-on-insulator structure with gettering sites |
IT1230028B (it) | 1988-12-16 | 1991-09-24 | Sgs Thomson Microelectronics | Procedimento di fabbricazione di dispositivi semiconduttori mos avvalentesi di un trattamento "gettering" di migliorare caratteristiche, e dispositivi semiconduttori mos con esso ottenuti |
JPH03173131A (ja) | 1989-12-01 | 1991-07-26 | Hitachi Ltd | 半導体装置の製造方法 |
JP2575545B2 (ja) | 1990-07-05 | 1997-01-29 | 株式会社東芝 | 半導体装置の製造方法 |
JPH05136153A (ja) | 1991-11-14 | 1993-06-01 | Toshiba Corp | 半導体装置及びその製造方法 |
US5223734A (en) * | 1991-12-18 | 1993-06-29 | Micron Technology, Inc. | Semiconductor gettering process using backside chemical mechanical planarization (CMP) and dopant diffusion |
JPH05206146A (ja) | 1992-01-24 | 1993-08-13 | Toshiba Corp | 半導体装置の製造方法 |
JP3173131B2 (ja) | 1992-06-15 | 2001-06-04 | ソニー株式会社 | ディジタル映像信号処理装置 |
JP2607853B2 (ja) | 1994-09-27 | 1997-05-07 | 直江津電子工業株式会社 | シリコン半導体ウエハの拡散方法及びディスクリート基板の製造方法 |
JP3921764B2 (ja) | 1997-12-04 | 2007-05-30 | 株式会社デンソー | 半導体装置の製造方法 |
JP2002507058A (ja) * | 1998-03-09 | 2002-03-05 | ハリス コーポレイション | 低温直接ボンディングにより形成可能な装置 |
JP4218921B2 (ja) | 2000-04-24 | 2009-02-04 | 美和ロック株式会社 | 対震蝶番及びその製造方法 |
JP2004087665A (ja) | 2002-08-26 | 2004-03-18 | Sumitomo Mitsubishi Silicon Corp | 高抵抗シリコンウエーハ |
JP4211696B2 (ja) * | 2004-06-30 | 2009-01-21 | ソニー株式会社 | 固体撮像装置の製造方法 |
-
2006
- 2006-02-24 KR KR1020087018069A patent/KR101023666B1/ko active IP Right Grant
- 2006-02-24 EP EP06714608A patent/EP2006894B1/en active Active
- 2006-02-24 CN CN2006800532219A patent/CN101385130B/zh active Active
- 2006-02-24 JP JP2008501549A patent/JP5151975B2/ja active Active
- 2006-02-24 US US12/159,787 patent/US8329563B2/en active Active
- 2006-02-24 WO PCT/JP2006/303469 patent/WO2007096996A1/ja active Application Filing
- 2006-04-03 TW TW095111775A patent/TW200733177A/zh unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5954230A (ja) * | 1982-09-21 | 1984-03-29 | Toshiba Corp | 半導体装置の製造方法 |
JPS62221122A (ja) * | 1986-03-24 | 1987-09-29 | Toshiba Corp | 半導体装置の製造方法 |
JPS63108729A (ja) * | 1986-10-24 | 1988-05-13 | Nec Corp | 半導体ウエ−フア |
JPS6412537A (en) * | 1987-07-07 | 1989-01-17 | Nec Corp | Formation of defective layer in semiconductor substrate |
JPH0738102A (ja) * | 1993-07-20 | 1995-02-07 | Fuji Electric Co Ltd | 高耐圧半導体装置の製造方法 |
JPH09260392A (ja) * | 1996-03-25 | 1997-10-03 | Toshiba Corp | 半導体装置およびその製造方法 |
JP2005145744A (ja) | 2003-11-13 | 2005-06-09 | Sumitomo Mitsubishi Silicon Corp | 高抵抗シリコンウェーハ |
Non-Patent Citations (1)
Title |
---|
See also references of EP2006894A4 * |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008041836A (ja) * | 2006-08-03 | 2008-02-21 | Denso Corp | 半導体装置の製造方法 |
US8546815B2 (en) | 2009-12-16 | 2013-10-01 | National University Corporation NARA Institute of Science and Technology | SiC semiconductor element and manufacturing method for same |
WO2011074237A1 (ja) * | 2009-12-16 | 2011-06-23 | 国立大学法人奈良先端科学技術大学院大学 | SiC半導体素子およびその作製方法 |
US8765562B2 (en) | 2011-09-28 | 2014-07-01 | Sumitomo Electric Industries, Ltd. | Method for manufacturing silicon carbide semiconductor device |
WO2013046977A1 (ja) * | 2011-09-28 | 2013-04-04 | 住友電気工業株式会社 | 炭化珪素半導体装置の製造方法 |
WO2014054121A1 (ja) * | 2012-10-02 | 2014-04-10 | 三菱電機株式会社 | 半導体装置、半導体装置の製造方法 |
US10475663B2 (en) | 2012-10-02 | 2019-11-12 | Mitsubishi Electric Corporation | Semiconductor device and method for manufacturing semiconductor device |
US10950461B2 (en) | 2012-10-02 | 2021-03-16 | Mitsubishi Electric Corporation | Method for manufacturing semiconductor device |
JP2014075483A (ja) * | 2012-10-04 | 2014-04-24 | Sanken Electric Co Ltd | 半導体装置及び半導体装置の製造方法 |
US9647094B2 (en) | 2013-08-02 | 2017-05-09 | University Of Kentucky Research Foundation | Method of manufacturing a semiconductor heteroepitaxy structure |
JP2015041720A (ja) * | 2013-08-23 | 2015-03-02 | 富士電機株式会社 | 半導体装置の製造方法 |
JP2018137454A (ja) * | 2015-06-17 | 2018-08-30 | 富士電機株式会社 | 半導体装置および半導体装置の製造方法 |
US10756182B2 (en) | 2015-06-17 | 2020-08-25 | Fuji Electric Co., Ltd. | Semiconductor device and method of manufacturing semiconductor device |
US11335772B2 (en) | 2015-06-17 | 2022-05-17 | Fuji Electric Co., Ltd. | Semiconductor device and method of manufacturing semiconductor device |
JP2015233146A (ja) * | 2015-07-15 | 2015-12-24 | 三菱電機株式会社 | 半導体装置、半導体装置の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN101385130B (zh) | 2010-12-22 |
US20090267191A1 (en) | 2009-10-29 |
JP5151975B2 (ja) | 2013-02-27 |
EP2006894A4 (en) | 2009-05-27 |
EP2006894B1 (en) | 2012-07-25 |
JPWO2007096996A1 (ja) | 2009-07-09 |
EP2006894A9 (en) | 2009-05-20 |
EP2006894A2 (en) | 2008-12-24 |
CN101385130A (zh) | 2009-03-11 |
KR20080086911A (ko) | 2008-09-26 |
KR101023666B1 (ko) | 2011-03-25 |
US8329563B2 (en) | 2012-12-11 |
TWI301995B (ja) | 2008-10-11 |
TW200733177A (en) | 2007-09-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5151975B2 (ja) | 半導体装置の製造方法 | |
CN105793991A (zh) | 半导体装置 | |
JP3727827B2 (ja) | 半導体装置 | |
US4080618A (en) | Insulated-gate field-effect transistor | |
JP2008034652A (ja) | 半導体装置及びその製造方法 | |
JP6678549B2 (ja) | 半導体装置およびその製造方法、並びに電力変換システム | |
JP6654189B2 (ja) | 薄い半導体ウェハを備える半導体デバイスの製造方法 | |
JP6268117B2 (ja) | 半導体装置およびその製造方法、並びに電力変換システム | |
US11881504B2 (en) | Semiconductor device and manufacturing method therefor | |
JP5867609B2 (ja) | 半導体装置の製造方法 | |
JP4951872B2 (ja) | 半導体装置の製造方法 | |
JP4892825B2 (ja) | 半導体装置の製造方法 | |
JP2005142511A (ja) | 半導体装置とその製造方法 | |
JP2843037B2 (ja) | 半導体装置の製造方法 | |
JP2014056881A (ja) | 半導体装置および半導体装置の製造方法 | |
JP5707765B2 (ja) | 半導体装置の製造方法 | |
WO2023176887A1 (ja) | 半導体装置および半導体装置の製造方法 | |
JP5446158B2 (ja) | 半導体装置及びその製造方法 | |
JPS63164440A (ja) | 半導体装置の製造方法 | |
CN116547788A (zh) | 半导体装置的制造方法以及半导体装置 | |
JP2014157861A (ja) | 半導体装置の製造方法 | |
CN111490098A (zh) | 一种沟槽型SiC IGBT结构及其制备方法 | |
JPH0442938A (ja) | 半導体装置の製造方法 | |
JP2005317853A (ja) | シリコン結晶中のCu不純物のゲッタリング方法 | |
JPH06334186A (ja) | 半導体装置の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
ENP | Entry into the national phase |
Ref document number: 2008501549 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006714608 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12159787 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020087018069 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200680053221.9 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |