KR100350815B1 - 유전체 형성방법 - Google Patents
유전체 형성방법 Download PDFInfo
- Publication number
- KR100350815B1 KR100350815B1 KR1019950031774A KR19950031774A KR100350815B1 KR 100350815 B1 KR100350815 B1 KR 100350815B1 KR 1019950031774 A KR1019950031774 A KR 1019950031774A KR 19950031774 A KR19950031774 A KR 19950031774A KR 100350815 B1 KR100350815 B1 KR 100350815B1
- Authority
- KR
- South Korea
- Prior art keywords
- dielectric
- fluorine
- gate electrode
- nitrogen
- fluorinated
- 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.)
- Expired - Lifetime
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000015572 biosynthetic process Effects 0.000 title claims description 9
- 239000011737 fluorine Substances 0.000 claims abstract description 62
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 62
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims abstract description 57
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 230000001590 oxidative effect Effects 0.000 claims description 15
- 238000000137 annealing Methods 0.000 claims description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 12
- 239000007800 oxidant agent Substances 0.000 claims description 7
- -1 fluorine ions Chemical class 0.000 claims description 6
- 230000000644 propagated effect Effects 0.000 claims 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 45
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 22
- 230000005684 electric field Effects 0.000 abstract description 4
- 238000002513 implantation Methods 0.000 abstract description 2
- 230000003993 interaction Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 24
- 239000003989 dielectric material Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 7
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 6
- 239000000460 chlorine Substances 0.000 description 6
- 229910052801 chlorine Inorganic materials 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 239000001272 nitrous oxide Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 230000005669 field effect Effects 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
- 239000007943 implant Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010405 reoxidation reaction Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005406 washing 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28185—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation with a treatment, e.g. annealing, after the formation of the gate insulator and before the formation of the definitive gate conductor
-
- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28176—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation with a treatment, e.g. annealing, after the formation of the definitive gate conductor
-
- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28202—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation in a nitrogen-containing ambient, e.g. nitride deposition, growth, oxynitridation, NH3 nitridation, N2O oxidation, thermal nitridation, RTN, plasma nitridation, RPN
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/60—Electrodes characterised by their materials
- H10D64/66—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes
- H10D64/68—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator
- H10D64/681—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator having a compositional variation, e.g. multilayered
- H10D64/685—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator having a compositional variation, e.g. multilayered being perpendicular to the channel plane
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/60—Electrodes characterised by their materials
- H10D64/66—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes
- H10D64/68—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator
- H10D64/693—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator the insulator comprising nitrogen, e.g. nitrides, oxynitrides or nitrogen-doped materials
-
- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28211—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation in a gaseous ambient using an oxygen or a water vapour, e.g. RTO, possibly through a layer
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- Engineering & Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Formation Of Insulating Films (AREA)
- Non-Volatile Memory (AREA)
Abstract
Description
Claims (5)
- 유전체 형성 방법에 있어서,표면부를 갖는 기판(10)을 제공하는 단계와, 질소 함유 산화제를 사용하여 기판의 표면부를 산화하여 질소 함유 유전체(12)를 형성하는 단계와,상기 질소 함유 유전체 위에 게이트 전극(18)을 형성하는 단계와,불소(F)를 게이트 전극으로 주입하여 불소화된 게이트 전극(20)을 형성하는 단계와,상기 불소화된 게이트 전극을 어닐링하여 불소를 상기 질소 함유 유전체에 추진함으로써 불소화된 질소 함유 유전체(12')를 형성하는 단계를 포함하는 것을 특징으로 하는 유전체 형성 방법.
- 유전체 형성 방법에 있어서,표면부를 갖는 기판(10)을 제공하는 단계와,상기 기판의 표면부를 산화하여 산화물층을 형성하는 단계와,질소 함유 분위기로 산화물층을 어닐링하여 질소 함유 유전체(12)를 형성하는 단계와,상기 질소 함유 유전체 위에 게이트 전극(18)을 형성하는 단계와,불소(F)를 상기 게이트 전극으로 주입하여 불소화된 게이트 전극(2)을 형성하는 단계와,불소화된 게이트 전극을 어닐링하여 불소를 상기 질소 함유 유전체로 추진함으로써 불소화된 질소 함유 유전체(12')를 형성하는 단계를 포함하는 것을 특징으로 하는 유전체 형성 방법.
- 유전체 형성 방법에 있어서,표면부를 갖는 규소 기판(10)을 제공하는 단계와,상기 규소 기판의 상기 표면부상에 질소 함유 유전체(12)를 형성하는 단계와,상기 질소 함유 유전체 위에 게이트 전극(18)을 형성하는 단계와,상기 게이트 전극 위에 불소를 함유한 불소화된 유전체(24)를 성장시키는 단계를 포함하며,상기 불소화된 유전체의 불소가 상기 게이트 전극을 통하여 상기 질소 함유 유전체로 추진되어 불소화된 질소 함유 유전체(12')를 형성하는 것을 특징으로 하는 유전체 형성 방법.
- 유전체 형성 방법에 있어서,표면부를 갖는 규소 기판(10)을 제공하는 단계와,상기 규소 기판의 표면부상에 질소 함유 유전체(12)를 형성하는 단계와,상기 질소 함유 유전체 위에 게이트 전극(18)을 형성하는 단계와,O2로 상기 게이트 전극의 상면을 산화하여 산화물층을 형성하는 단계와,산화물층을 불소 함유 분위기로 어닐링하여 불소를 산화물 층으로 도입함으로써 불소화된 유전체를 형성하는 단계를 포함하며,상기 불소화된 유전체 내의 불소는 게이트 전극을 통하여 질소 함유 유전체로 추진되어 불소화된 질소 함유 유전체(12')를 형성하는 것을 특징으로 하는 유전체 형성 방법.
- 유전체 형성 방법에 있어서,표면부를 갖는 규소 기판(10)을 제공하는 단계와,상기 규소 기판의 표면부 상에 질소 함유 유전체(12)를 형성하는 단계와,상기 질소 함유 유전체 위에 게이트 전극(18)을 형성하는 단계와,O2로 게이트 전극의 상면을 산화하여 산화물층을 형성하기 위해 단계와,불소 이온을 산화물층으로 주입하여 상기 게이트 전극 위에 불소를 함유하는 불소화된 유전체를 형성하는 단계를 포함하며,상기 불소화된 유전체 내의 불소는 게이트 전극을 통하여 질소 함유 유전체로 추진되어 불소화된 질소 함유 유전체(12')를 형성하는 것을 특징으로 하는 유전체 형성 방법.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/316,175 US5571734A (en) | 1994-10-03 | 1994-10-03 | Method for forming a fluorinated nitrogen containing dielectric |
US316,175 | 1994-10-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR960015815A KR960015815A (ko) | 1996-05-22 |
KR100350815B1 true KR100350815B1 (ko) | 2002-12-16 |
Family
ID=23227843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950031774A Expired - Lifetime KR100350815B1 (ko) | 1994-10-03 | 1995-09-26 | 유전체 형성방법 |
Country Status (5)
Country | Link |
---|---|
US (1) | US5571734A (ko) |
EP (1) | EP0706204A3 (ko) |
JP (1) | JPH08116059A (ko) |
KR (1) | KR100350815B1 (ko) |
TW (1) | TW290726B (ko) |
Families Citing this family (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5440168A (en) * | 1993-02-22 | 1995-08-08 | Ryoden Semiconductor System Engineering Corporation | Thin-film transistor with suppressed off-current and Vth |
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US5382533A (en) * | 1993-06-18 | 1995-01-17 | Micron Semiconductor, Inc. | Method of manufacturing small geometry MOS field-effect transistors having improved barrier layer to hot electron injection |
-
1994
- 1994-10-03 US US08/316,175 patent/US5571734A/en not_active Expired - Lifetime
-
1995
- 1995-08-31 TW TW084109105A patent/TW290726B/zh not_active IP Right Cessation
- 1995-09-18 EP EP95306538A patent/EP0706204A3/en not_active Withdrawn
- 1995-09-26 KR KR1019950031774A patent/KR100350815B1/ko not_active Expired - Lifetime
- 1995-09-29 JP JP7275125A patent/JPH08116059A/ja active Pending
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EP0706204A2 (en) | 1996-04-10 |
EP0706204A3 (en) | 1998-09-30 |
US5571734A (en) | 1996-11-05 |
JPH08116059A (ja) | 1996-05-07 |
TW290726B (ko) | 1996-11-11 |
KR960015815A (ko) | 1996-05-22 |
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