WO2002097873A1 - Maskentechnik zur produktion von halbleiter-bauelementen, insbesondere einer bh-laserdiode - Google Patents
Maskentechnik zur produktion von halbleiter-bauelementen, insbesondere einer bh-laserdiode Download PDFInfo
- Publication number
- WO2002097873A1 WO2002097873A1 PCT/DE2001/002915 DE0102915W WO02097873A1 WO 2002097873 A1 WO2002097873 A1 WO 2002097873A1 DE 0102915 W DE0102915 W DE 0102915W WO 02097873 A1 WO02097873 A1 WO 02097873A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mask
- etching step
- etching
- semiconductor
- laser diode
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000004065 semiconductor Substances 0.000 title claims abstract description 29
- 230000000873 masking effect Effects 0.000 title claims abstract description 8
- 238000005530 etching Methods 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000011065 in-situ storage Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 30
- 238000000407 epitaxy Methods 0.000 claims description 12
- NBRKLOOSMBRFMH-UHFFFAOYSA-N tert-butyl chloride Chemical compound CC(C)(C)Cl NBRKLOOSMBRFMH-UHFFFAOYSA-N 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 9
- 208000012868 Overgrowth Diseases 0.000 claims description 6
- 238000001459 lithography Methods 0.000 claims description 4
- 239000011241 protective layer Substances 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 2
- 239000000523 sample Substances 0.000 description 18
- 238000011109 contamination Methods 0.000 description 6
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 4
- 229910052733 gallium Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- 238000011066 ex-situ storage Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 2
- 101000891620 Homo sapiens TBC1 domain family member 1 Proteins 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 102100040238 TBC1 domain family member 1 Human genes 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910000039 hydrogen halide Inorganic materials 0.000 description 1
- 239000012433 hydrogen halide Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
- 238000007704 wet chemistry method 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
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0335—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by their behaviour during the process, e.g. soluble masks, redeposited masks
-
- 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3083—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/3085—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by their behaviour during the process, e.g. soluble masks, redeposited masks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/2054—Methods of obtaining the confinement
- H01S5/2077—Methods of obtaining the confinement using lateral bandgap control during growth, e.g. selective growth, mask induced
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/2054—Methods of obtaining the confinement
- H01S5/2081—Methods of obtaining the confinement using special etching techniques
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/936—Graded energy gap
Definitions
- masking steps are usually used to structure the surface of a sample.
- the surface of the sample is partially covered with a mask, for example made of Si0 2 as an amorphous material.
- a mask for example made of Si0 2 as an amorphous material.
- the sample material in the area not covered by the mask is removed by an etching step (dry or wet chemical).
- Sample is understood here to mean any material that is structured in the course of the production of semiconductor components.
- BH Buried Heterostructure
- dry etching processes e.g. reactive
- Ion etching and / or wet chemical processes can be used.
- the disadvantage here is that the sample for removing the Si0 2 mask from the surface or for structuring the active layer of the BH laser diode from the epitaxial or etching system (eg dry etching system) must be taken, so that the sample contains air contaminants and atmospheric oxygen is exposed.
- the contamination is particularly negative for structures that contain aluminum, since it has a high binding affinity for oxygen. Since such structures are particularly important for semiconductor laser production, contamination has a particularly negative effect in ex situ processes.
- the present invention has for its object to provide a method with which the removal of the mask from the semiconductor material and a further application of layers is possible in a simple manner in the manufacture of semiconductor components.
- the etching rate in an etching step is selected depending on the composition and / or nature of the mask material, the mask is at least partially dissolved during the etching step.
- Masking and further processing of the sample can thus be carried out in situ in the epitaxy system.
- a type of self-dissolving mask can thus be created, in which the etching rate is advantageously chosen such that the mask is removed from the sample at the end of the etching step or the layer underneath is etched.
- III-V semiconductor material in particular a single-crystalline III-V semiconductor material
- at least one mask material is Ga x In ⁇ - y ASyP ⁇ -y, AlGalnAs or InGaAlP. These materials can be removed from the sample in a particularly controlled manner by etching.
- etching step is carried out in which tertiary butyl chloride (TBCl) is used as the etchant.
- TBCl tertiary butyl chloride
- Process used hydrogen halide e.g. HCl
- Stainless steel parts such as Parts of the epitaxy system, valves or pipes not attacked.
- the etching rate of this etchant can also be controlled in a particularly simple manner. In this way, a “self-dissolving mask” can be created which can be removed from the sample in situ. The mask can at least partially be dissolved during the etching, which means a considerable saving in process time.
- the etching step is advantageously carried out in the same device in which the structure was previously applied in and / or on the sample.
- At least one epitaxial layer in particular a protective layer, is advantageously applied to the surface.
- the in-situ overgrowth prevents contamination and saves valuable process time.
- the doping type of the growth layers is advantageously complementary to the doping type of a substrate for the semiconductor component. Furthermore, it is advantageous if the band gap to at least one overgrowth layer is larger than the band gap of the active layer of the semiconductor component.
- at least one full-area etching of a web for a BH laser diode is carried out in the epitaxial system during the etching step. This enables an essential manufacturing step to be carried out in situ.
- the resulting semiconductor structure can advantageously be used in a semiconductor component, in particular a BH laser.
- an etching step with TBC1 is used in particular to produce the web structure, and a subsequent epitaxial step is carried out for overgrowing.
- the etching step and the overgrowth step are carried out in situ in the same epitaxy system (without the sample leaving the epitaxy system), so that particularly efficient, low-contamination and efficient production is achieved.
- Step for generating a basic structure Step for generating a basic structure.
- 3a shows a schematic view of a first manufacturing step for a BH laser diode
- Fig. 3b is a schematic view of a second Manufacturing step for a BH laser diode
- Fig. 3c is a schematic view of a third
- FIG. 1 A wafer serves as the substrate.
- the substrate with the layer structure of the semiconductor component is referred to as a sample.
- the mask is placed over the layer system.
- a basic component structure is applied epitaxially to a wafer.
- the mask material is also applied epitaxially.
- this is Ga x In ⁇ _ y As y P ⁇ - y .
- AlGalnAs can also be used as III-V semiconductor material.
- the mask material is a pure substance (e.g. Si), e.g. the crystal structure or other material properties are specifically selected so that the controlled dissolution effect results in-situ.
- Epitaxy is generally understood here to mean the deposition of layers on substrates, it being possible in principle for the layers to be amorphous, polycrystalline or single-crystal. Thus, basically every deposition process (chemical or physical) is meant here.
- the surface of the sample and the mask is structured ex-situ in a manner known per se, for example by lithography.
- the etching step a structure is etched on and / or in the sample in the epitaxy system.
- Tertiary butyl chloride (2-chloro-2-methylpropane; TBCl) is used as the etching gas.
- TBC1 is chemically less aggressive than the commonly used etching gases, such as hydrogen chloride based.
- the choice of etching gas may also depend on the one used
- the etching rate of TBCl with the mask material Ga x Inx-yASyPi-y depends on the composition of the mask material, that is to say on x and y. This is described in more detail in FIG. 2.
- the composition of the mask material is chosen such that, after the end of the etching step 3, the mask material is just removed from the sample.
- the mask material can be removed to a predeterminable amount or it can be etched into the underlying layer.
- a fourth method step 4 further layers are overgrown, in particular epitaxial protective layers. This is particularly advantageous for aluminum-containing sample materials, since they are particularly sensitive to contamination.
- the semiconductor structure produced can be used, for example, in a semiconductor laser.
- 2 shows graphically measured values in which the dependence of the etching rate (in nm / hr) is plotted on the ordinate.
- the gallium fraction x in the mask material Ga x In ⁇ -yAs y P ⁇ -y (in%) is plotted on the abscissa.
- the measured values were reached at a temperature of 580 ° C and a flow of TBCl-8,2xl0 "5 mol / min (without PH 3).
- the Wasserstoffehrström was 16 1 / min.
- the etching rate can be set such that a mask of a predetermined thickness is completely removed from the sample after the etching has been completed. If the etching rate is specified, the thickness of the mask material can be determined accordingly in order to achieve the same goal.
- FIGS. 3a to 3c The method according to the invention is further explained in FIGS. 3a to 3c on the basis of the production of a BH laser diode.
- the first structuring is shown in FIG. 3a as the first manufacturing step.
- FIG. 3b shows the etching step 3 with TBCl, while
- FIG. 3c shows the epitaxial overgrowth over the entire area.
- the BH laser diode is built up on an n-doped InP substrate 10.
- An active layer 20 is arranged above it, which is covered by a p-doped InGaAsP (2) layer 30.
- P-doped InGaAsP (I) serves as mask 40.
- the bridge of the BH laser is formed because the p-InGaAsP (2) - Layer 30 and the active layer 20 is etched down to the substrate 10.
- the mask 40 is somewhat reduced in its thickness by the etching with TBCl. As described above, in alternative embodiments, the thickness of the mask 40 can also be set such that the mask 40 has completely disappeared after the etching with TBCl.
- the BH laser structure is also provided with a p-doped cladding layer 50 and with a contact layer 60 in situ.
- the material systems (In) GaAlAs / GaAs, InGaAlP / GaAs or InGaAlP / InP can be used.
- a reversal of the doping of the layers is also conceivable, i.e. an n-doped InP substrate 10 is used.
- the embodiment of the invention is not limited to the preferred exemplary embodiments specified above. Rather, a number of variants are conceivable which make use of the method and the device according to the invention even in the case of fundamentally different types.
- First step waxing the basic structure and the mask material 2
- Second step structuring the mask (e.g. lithography)
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Drying Of Semiconductors (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01969202A EP1390970A1 (de) | 2001-05-29 | 2001-07-30 | Maskentechnik zur produktion von halbleiter-bauelementen, insbesondere einer bh-laserdiode |
US10/052,950 US6699778B2 (en) | 2001-05-29 | 2002-01-18 | Masking method for producing semiconductor components, particularly a BH laser diode |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10127580A DE10127580B4 (de) | 2001-05-29 | 2001-05-29 | In-situ-Maskentechnik zur Produktion von III-V Halbleiter-Bauelementen |
DE10127580.3 | 2001-05-29 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/867,290 Continuation-In-Part US6599843B2 (en) | 2001-05-29 | 2001-05-29 | In-situ mask technique for producing III-V semiconductor components |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/867,290 Continuation US6599843B2 (en) | 2001-05-29 | 2001-05-29 | In-situ mask technique for producing III-V semiconductor components |
US10/052,950 Continuation US6699778B2 (en) | 2001-05-29 | 2002-01-18 | Masking method for producing semiconductor components, particularly a BH laser diode |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002097873A1 true WO2002097873A1 (de) | 2002-12-05 |
Family
ID=7687461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2001/002915 WO2002097873A1 (de) | 2001-05-29 | 2001-07-30 | Maskentechnik zur produktion von halbleiter-bauelementen, insbesondere einer bh-laserdiode |
Country Status (4)
Country | Link |
---|---|
US (1) | US6699778B2 (de) |
EP (1) | EP1390970A1 (de) |
DE (1) | DE10127580B4 (de) |
WO (1) | WO2002097873A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2411520A (en) * | 2004-02-25 | 2005-08-31 | Agilent Technologies Inc | Method of forming laser mesa by reactive ion etching followed by in situ etching in regrowth reactor |
KR20180014903A (ko) | 2016-08-01 | 2018-02-12 | 삼성디스플레이 주식회사 | 전자 소자, 이의 실장 방법 및 이를 포함하는 표시 장치의 제조 방법 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3215410A1 (de) * | 1982-04-24 | 1983-10-27 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren zum herstellen von oeffnungen mit hilfe einer maske in einer auf einer unterlage befindlichen schicht |
US4595454A (en) * | 1984-06-15 | 1986-06-17 | At&T Bell Laboratories | Fabrication of grooved semiconductor devices |
JPH05299764A (ja) * | 1992-04-23 | 1993-11-12 | Matsushita Electric Ind Co Ltd | 半導体レーザの製造方法 |
JPH06342777A (ja) * | 1993-06-01 | 1994-12-13 | Nec Corp | 化合物半導体のドライエッチング方法 |
US5866435A (en) * | 1995-08-31 | 1999-02-02 | Samsung Electronics Co., Ltd. | Methods of fabricating profiled device isolation trenches in integrated circuits |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61171136A (ja) * | 1985-01-25 | 1986-08-01 | Toshiba Corp | 半導体結晶のメサエツチング方法 |
US4661204A (en) * | 1985-10-25 | 1987-04-28 | Tandem Computers Inc. | Method for forming vertical interconnects in polyimide insulating layers |
EP0286708B1 (de) * | 1987-04-16 | 1992-01-22 | International Business Machines Corporation | Verfahren zur Herstellung von Kontaktöffnungen in einer Doppellagenisolation |
US5316640A (en) * | 1991-06-19 | 1994-05-31 | Matsushita Electric Industrial Co., Ltd. | Fabricating method of micro lens |
JP2757642B2 (ja) * | 1991-12-20 | 1998-05-25 | 日本電気株式会社 | ドライエッチング方法 |
JPH05217995A (ja) | 1992-02-04 | 1993-08-27 | Fujitsu Ltd | 半導体装置の製造方法 |
JP3129510B2 (ja) * | 1992-03-19 | 2001-01-31 | 富士通株式会社 | InGaPのエッチング方法及びそのエッチング方法を用いた半導体装置の製造方法 |
JPH0677205A (ja) * | 1992-08-26 | 1994-03-18 | Matsushita Electric Ind Co Ltd | 化合物半導体の微細構造形成方法 |
JP3323389B2 (ja) * | 1996-02-01 | 2002-09-09 | 株式会社テラテック | 半導体素子の製造方法 |
-
2001
- 2001-05-29 DE DE10127580A patent/DE10127580B4/de not_active Expired - Fee Related
- 2001-07-30 WO PCT/DE2001/002915 patent/WO2002097873A1/de not_active Application Discontinuation
- 2001-07-30 EP EP01969202A patent/EP1390970A1/de not_active Withdrawn
-
2002
- 2002-01-18 US US10/052,950 patent/US6699778B2/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3215410A1 (de) * | 1982-04-24 | 1983-10-27 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren zum herstellen von oeffnungen mit hilfe einer maske in einer auf einer unterlage befindlichen schicht |
US4595454A (en) * | 1984-06-15 | 1986-06-17 | At&T Bell Laboratories | Fabrication of grooved semiconductor devices |
JPH05299764A (ja) * | 1992-04-23 | 1993-11-12 | Matsushita Electric Ind Co Ltd | 半導体レーザの製造方法 |
JPH06342777A (ja) * | 1993-06-01 | 1994-12-13 | Nec Corp | 化合物半導体のドライエッチング方法 |
US5866435A (en) * | 1995-08-31 | 1999-02-02 | Samsung Electronics Co., Ltd. | Methods of fabricating profiled device isolation trenches in integrated circuits |
Non-Patent Citations (3)
Title |
---|
LOTHIAN J R ET AL: "MASK EROSION DURING DRY ETCHING OF DEEP FEATURES IN III-V SEMICONDUCTOR STRUCTURES", SEMICONDUCTOR SCIENCE AND TECHNOLOGY, INSTITUTE OF PHYSICS. LONDON, GB, vol. 7, no. 9, 1 September 1992 (1992-09-01), pages 1199 - 1209, XP000335239, ISSN: 0268-1242 * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 095 (E - 1509) 16 February 1994 (1994-02-16) * |
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 03 28 April 1995 (1995-04-28) * |
Also Published As
Publication number | Publication date |
---|---|
DE10127580B4 (de) | 2006-04-27 |
US6699778B2 (en) | 2004-03-02 |
EP1390970A1 (de) | 2004-02-25 |
DE10127580A1 (de) | 2002-12-05 |
US20020182879A1 (en) | 2002-12-05 |
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