EP3738138A1 - Halbleiterscheibe mit epitaktischer schicht - Google Patents
Halbleiterscheibe mit epitaktischer schichtInfo
- Publication number
- EP3738138A1 EP3738138A1 EP18826231.5A EP18826231A EP3738138A1 EP 3738138 A1 EP3738138 A1 EP 3738138A1 EP 18826231 A EP18826231 A EP 18826231A EP 3738138 A1 EP3738138 A1 EP 3738138A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- semiconductor wafer
- epitaxial layer
- wafer
- substrate wafer
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/29—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials characterised by the substrates
- H10P14/2926—Crystal orientations
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/458—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for supporting substrates in the reaction chamber
- C23C16/4582—Rigid and flat substrates, e.g. plates or discs
- C23C16/4583—Rigid and flat substrates, e.g. plates or discs the substrate being supported substantially horizontally
- C23C16/4585—Devices at or outside the perimeter of the substrate support, e.g. clamping rings, shrouds
-
- 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
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
- H10D62/83—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/29—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials characterised by the substrates
- H10P14/2901—Materials
- H10P14/2902—Materials being Group IVA materials
- H10P14/2905—Silicon, silicon germanium or germanium
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/34—Deposited materials, e.g. layers
- H10P14/3402—Deposited materials, e.g. layers characterised by the chemical composition
- H10P14/3404—Deposited materials, e.g. layers characterised by the chemical composition being Group IVA materials
- H10P14/3411—Silicon, silicon germanium or germanium
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/36—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials characterised by treatments done before the formation of the materials
Definitions
- the invention relates to a semiconductor wafer of monocrystalline silicon, comprising a substrate wafer of monocrystalline silicon and one on the
- Substrate wafer lying layer of single-crystal silicon which is hereinafter referred to as semiconductor wafer of silicon with epitaxial layer (silicon epitaxial wafer).
- the production of such silicon wafers with an epitaxial layer comprises the deposition of the epitaxial layer on a substrate wafer by means of chemical vapor deposition (CVD).
- CVD chemical vapor deposition
- Particularly suitable is a CVD, which is carried out in a single-plate reactor under atmospheric pressure (atmospheric pressure).
- semiconductor wafers made of silicon with an epitaxial layer are required, which have a particularly uniform edge geometry.
- the prerequisite for this is that the thickness of the epitaxial layer is particularly uniform.
- the object of the present invention is to make a proposal that better meets expectations.
- a semiconductor wafer of monocrystalline silicon comprising a substrate wafer of monocrystalline silicon and a layer of monocrystalline silicon, which lies on a front side of the substrate wafer, wherein the substrate wafer has a crystal orientation, characterized in that a front-side averaged ZDD of the semiconductor wafer a division of the surface of the epitaxial layer into 16 sectors and an edge exclusion of 1 mm not less than - 30 nm / mm 2 and not more than 0 nm / mm 2 and the ESFQR max of the semiconductor wafer with an edge exclusion of 1 mm and 72
- Sectors each with a length of 30 mm is not more than 10 nm.
- ZDD and ESFQR are parameters characterizing the edge geometry of a wafer, which are also addressed by SEMI standards (ZDD (SEMI M68-1015), ESFQR (SEMI M67-1015)).
- the front-side ZDD describes the average edge curvature of the surface.
- ESFQRm a x denotes the ESFQR of the sector in which the ESFQR is largest.
- a semiconductor wafer with epitaxial layer according to the invention shows almost no angle-dependent fluctuations in the edge geometry of the epitaxial layer
- the epitaxial layer covers almost only the major surface of the front side of the substrate disc, which determines the crystal orientation of the substrate disc, and almost no regions of the front side, which have a different crystal orientation, because an oxide layer provided on the edge of the substrate disc largely prevents the epitaxial layer is deposited on such areas.
- front-side ZDD (the two-fold derivative of the height perpendicular from the median plane to the surface of the epitaxial layer) and expressed as mean ZDD of sectors in which the ZDD is determined is the edge geometry of the semiconductor wafer with epitaxial layer in a division of the surface of the epitaxial layer in 16 sectors and taking into account a
- the ESFQR max of the semiconductor wafer is at most 10 nm, at one
- the diameter of a semiconductor wafer according to the invention is preferably not less than 300 mm, particularly preferably 300 mm.
- the production of a semiconductor wafer according to the invention preferably comprises the following steps:
- an asymmetric double-side polishing of the substrate wafer which partially removes the oxide layer and limits its extension to the back surface and to the surface of an edge region of the substrate wafer;
- the region of the edge and the back side of the substrate wafer is masked with an oxide layer and the CMP step (chemical mechanical polishing) creates a mirror-polished front side of the substrate wafer which largely consists of a main surface with a uniform crystal orientation.
- the crystal orientation of the major surface of the front of the substrate wafer is
- asymmetrical double-sided polish is meant a double-sided polish in which the removal of material on the front is faster than on the back, and at the end of the oxide layer is completely polished from the front, while it is still present on the back.
- EP 0 857 542 A1 describes, for example, how an asymmetric material removal can be brought about
- the oxide layer is a layer of silicon dioxide and is preferably produced by means of CVD, particularly preferably by means of AP-CVD (atmospheric pressure CVD). Alternatively, the oxide layer can also be produced by means of LP-CVD (low pressure CVD) or thermally.
- the oxide layer preferably has a thickness of not less than 5 nm and not more than 100 nm.
- the substrate wafer is first completely covered with the oxide layer. Subsequently, the substrate wafer is subjected to an asymmetrical DSP polishing, in the course of which the oxide layer on the front side of the substrate wafer is removed, but the oxide on the backside and in the region of the edge is retained. This is followed by a one-sided CMP polishing of the front side of the substrate wafer. The result of this procedure is that no oxide layer is left in the CMP polished areas of the substrate wafer.
- the epitaxial layer is deposited on the front of the
- Substrate disk which is free of the oxide layer. Native oxide can be used before
- Deposition of the epitaxial layer can be removed by a treatment of the front side with hydrogen (Fte bake).
- the substrate wafer lies on the deposition of the epitaxial layer on the susceptor of a CVD reactor so that the front surface is exposed to the deposition gas. Since the front crystal orientation is nearly uniform, and is preferably a ⁇ 100 ⁇ crystal orientation or a ⁇ 110 ⁇ crystal orientation, the epitaxial layer grows at a nearly uniform deposition rate on the front side of the substrate wafer.
- the thickness of the epitaxial layer is substantially uniform.
- An angle-dependent variation of the thickness of the epitaxial layer in the edge region is scarcely detectable because the oxide layer stands in the way of a causative epitaxial deposition in the edge region.
- the thickness of the epitaxial layer of silicon is preferably 1 to 15 ⁇ m, more preferably 1 to 7 ⁇ m.
- the deposition temperature is preferably in the range of 900 ° C to 1250 ° C.
- the deposition gas contains a silane, preferably trichlorosilane as a silicon source and hydrogen.
- the oxide layer is removed after the deposition of the epitaxial layer, preferably by a wet chemical means of a chemical
- Hydrogen fluoride and optionally hydrogen chloride and / or ammonium fluoride contains.
- concentration of hydrogen fluoride is preferably from 0.2% to 49% by weight.
- the wet-chemical step may be part of a cleaning sequence in the course of which the semiconductor wafer with other chemicals, for example with
- the oxide layer can also be removed dry, for example by means of plasma etching or reactive ion etching (RIE).
- RIE reactive ion etching
- a substrate wafer of 300 mm diameter monocrystalline silicon with ⁇ 100 ⁇ orientation of the front side was completely coated with an oxide layer in a CVD reactor. Following this, the substrate disc was first polished using DSP (with a hard (more abrasive material) polishing cloth on the front and a soft (less strong
- polishing material on the back and then a front polish by means of CMP and cleaned.
- the thickness of the epitaxial layer was 2.8 ⁇ m. Subsequently, the oxide layer was removed from the edge and back of the resulting epitaxially coated wafer in a bath containing hydrogen fluoride.
- the semiconductor wafer was cleaned and dried and subjected to a measurement of the edge geometry. With an edge exclusion of 1 mm and one
- the ESFQRm a x was 8 nm at one
- Another substrate wafer made of monocrystalline silicon having the properties of that of the example was coated with an epitaxial layer of monocrystalline silicon as in the example. However, it was waived, the
- front-side average ZDD had a value of -120 nm / mm 2 and a corresponding ESFQRm a x of 23 nm.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Chemical Vapour Deposition (AREA)
- Recrystallisation Techniques (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018200415.3A DE102018200415A1 (de) | 2018-01-11 | 2018-01-11 | Halbleiterscheibe mit epitaktischer Schicht |
| PCT/EP2018/084620 WO2019137728A1 (de) | 2018-01-11 | 2018-12-12 | Halbleiterscheibe mit epitaktischer schicht |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3738138A1 true EP3738138A1 (de) | 2020-11-18 |
Family
ID=64899269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18826231.5A Pending EP3738138A1 (de) | 2018-01-11 | 2018-12-12 | Halbleiterscheibe mit epitaktischer schicht |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US11482597B2 (de) |
| EP (1) | EP3738138A1 (de) |
| JP (1) | JP6996001B2 (de) |
| KR (1) | KR102416913B1 (de) |
| CN (1) | CN111602226B (de) |
| DE (1) | DE102018200415A1 (de) |
| IL (1) | IL275870B2 (de) |
| SG (1) | SG11202006496WA (de) |
| TW (1) | TWI692557B (de) |
| WO (1) | WO2019137728A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118407127A (zh) * | 2024-04-25 | 2024-07-30 | 西安奕斯伟材料科技股份有限公司 | 用于硅片的外延生长的基座、装置及方法、外延硅晶圆 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4119531A1 (de) | 1991-06-13 | 1992-12-17 | Wacker Chemitronic | Epitaxierte halbleiterscheiben mit sauerstoffarmer zone einstellbarer ausdehnung und verfahren zu ihrer herstellung |
| DE19704546A1 (de) | 1997-02-06 | 1998-08-13 | Wacker Siltronic Halbleitermat | Verfahren zur Herstellung einer einseitig beschichteten und mit einem Finish versehenen Halbleiterscheibe |
| JP2006190703A (ja) | 2004-12-28 | 2006-07-20 | Shin Etsu Handotai Co Ltd | エピタキシャルウェーハの製造方法及びエピタキシャルウェーハ |
| US8021484B2 (en) | 2006-03-30 | 2011-09-20 | Sumco Techxiv Corporation | Method of manufacturing epitaxial silicon wafer and apparatus therefor |
| JP2010021441A (ja) | 2008-07-11 | 2010-01-28 | Sumco Corp | エピタキシャル基板ウェーハ |
| KR20100121837A (ko) * | 2009-05-11 | 2010-11-19 | 주식회사 실트론 | 가장자리의 평탄도가 제어된 에피택셜 웨이퍼 및 그 제조 방법 |
| DE102009037281B4 (de) * | 2009-08-12 | 2013-05-08 | Siltronic Ag | Verfahren zur Herstellung einer polierten Halbleiterscheibe |
| JP5621702B2 (ja) * | 2011-04-26 | 2014-11-12 | 信越半導体株式会社 | 半導体ウェーハ及びその製造方法 |
| JP2013055231A (ja) | 2011-09-05 | 2013-03-21 | Shin Etsu Handotai Co Ltd | エピタキシャルウェーハの製造方法 |
| JP6312976B2 (ja) * | 2012-06-12 | 2018-04-18 | Sumco Techxiv株式会社 | 半導体ウェーハの製造方法 |
| JP6035982B2 (ja) | 2012-08-09 | 2016-11-30 | 株式会社Sumco | エピタキシャルシリコンウェーハの製造方法およびエピタキシャルシリコンウェーハ |
| DE102013218880A1 (de) * | 2012-11-20 | 2014-05-22 | Siltronic Ag | Verfahren zum Polieren einer Halbleiterscheibe, umfassend das gleichzeitige Polieren einer Vorderseite und einer Rückseite einer Substratscheibe |
| DE102015200890A1 (de) * | 2015-01-21 | 2016-07-21 | Siltronic Ag | Epitaktisch beschichtete Halbleiterscheibe und Verfahren zur Herstellung einer epitaktisch beschichteten Halbleiterscheibe |
| DE102015225663A1 (de) | 2015-12-17 | 2017-06-22 | Siltronic Ag | Verfahren zum epitaktischen Beschichten von Halbleiterscheiben und Halbleiterscheibe |
| KR101810643B1 (ko) * | 2016-02-02 | 2017-12-19 | 에스케이실트론 주식회사 | 에피텍셜 웨이퍼의 평탄도 제어 방법 |
| DE102016210203B3 (de) | 2016-06-09 | 2017-08-31 | Siltronic Ag | Suszeptor zum Halten einer Halbleiterscheibe, Verfahren zum Abscheiden einer epitaktischen Schicht auf einer Vorderseite einer Halbleiterscheibe und Halbleiterscheibe mit epitaktischer Schicht |
-
2018
- 2018-01-11 DE DE102018200415.3A patent/DE102018200415A1/de active Pending
- 2018-12-12 EP EP18826231.5A patent/EP3738138A1/de active Pending
- 2018-12-12 JP JP2020538589A patent/JP6996001B2/ja active Active
- 2018-12-12 WO PCT/EP2018/084620 patent/WO2019137728A1/de not_active Ceased
- 2018-12-12 CN CN201880086204.8A patent/CN111602226B/zh active Active
- 2018-12-12 KR KR1020207021519A patent/KR102416913B1/ko active Active
- 2018-12-12 SG SG11202006496WA patent/SG11202006496WA/en unknown
- 2018-12-12 IL IL275870A patent/IL275870B2/en unknown
- 2018-12-12 US US16/959,153 patent/US11482597B2/en active Active
-
2019
- 2019-01-09 TW TW108100798A patent/TWI692557B/zh active
Also Published As
| Publication number | Publication date |
|---|---|
| IL275870B1 (en) | 2024-04-01 |
| KR20200097348A (ko) | 2020-08-18 |
| CN111602226B (zh) | 2023-10-24 |
| KR102416913B1 (ko) | 2022-07-05 |
| TWI692557B (zh) | 2020-05-01 |
| US11482597B2 (en) | 2022-10-25 |
| US20210376088A1 (en) | 2021-12-02 |
| CN111602226A (zh) | 2020-08-28 |
| DE102018200415A1 (de) | 2019-07-11 |
| WO2019137728A1 (de) | 2019-07-18 |
| SG11202006496WA (en) | 2020-08-28 |
| IL275870A (en) | 2020-10-29 |
| JP6996001B2 (ja) | 2022-01-17 |
| IL275870B2 (en) | 2024-08-01 |
| JP2021510459A (ja) | 2021-04-22 |
| TW201938852A (zh) | 2019-10-01 |
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