CA1151105A - Gas-discharge method for coating the interior of electrically non-conductive pipes - Google Patents
Gas-discharge method for coating the interior of electrically non-conductive pipesInfo
- Publication number
- CA1151105A CA1151105A CA000373275A CA373275A CA1151105A CA 1151105 A CA1151105 A CA 1151105A CA 000373275 A CA000373275 A CA 000373275A CA 373275 A CA373275 A CA 373275A CA 1151105 A CA1151105 A CA 1151105A
- Authority
- CA
- Canada
- Prior art keywords
- pipe
- gas
- length
- coating
- interior
- 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
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000011248 coating agent Substances 0.000 title claims abstract description 9
- 230000008021 deposition Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 3
- IHPYMWDTONKSCO-UHFFFAOYSA-N 2,2'-piperazine-1,4-diylbisethanesulfonic acid Chemical compound OS(=O)(=O)CCN1CCN(CCS(O)(=O)=O)CC1 IHPYMWDTONKSCO-UHFFFAOYSA-N 0.000 abstract 1
- 239000007990 PIPES buffer Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 15
- 238000010494 dissociation reaction Methods 0.000 description 3
- 230000005593 dissociations Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 241000592503 Speea Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229940035564 duration Drugs 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01807—Reactant delivery systems, e.g. reactant deposition burners
- C03B37/01815—Reactant deposition burners or deposition heating means
- C03B37/01823—Plasma deposition burners or heating means
- C03B37/0183—Plasma deposition burners or heating means for plasma within a tube substrate
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/001—General methods for coating; Devices therefor
- C03C17/003—General methods for coating; Devices therefor for hollow ware, e.g. containers
- C03C17/004—Coating the inside
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/02—Surface treatment of glass, not in the form of fibres or filaments, by coating with glass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/4505—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application
-
- 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
- C23C16/50—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 using electric discharges
- C23C16/515—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 using electric discharges using pulsed discharges
Abstract
GAS-DISCHARGE METHOD FOR COATING THE INTERIOR
OF ELECTRICALLY NON-CONDUCTIVE PIPES
ABSTRACT OF THE DISCLOSURE
A method for coating the interior of electrically non-conductive pipes by means of a reactive separation from a gas flowing through the pipe, whereby the gas is dissociated by an electrical gas discharge, and wherein the separation occurs simultaneously through-out the total pipe length. Pulse discharges are used having pulse lengths which are so adjusted to the transit time of the gas through the pipe that the time period between two successive pulses corresponds to the time which is required for filling the pipe with unused gas.
OF ELECTRICALLY NON-CONDUCTIVE PIPES
ABSTRACT OF THE DISCLOSURE
A method for coating the interior of electrically non-conductive pipes by means of a reactive separation from a gas flowing through the pipe, whereby the gas is dissociated by an electrical gas discharge, and wherein the separation occurs simultaneously through-out the total pipe length. Pulse discharges are used having pulse lengths which are so adjusted to the transit time of the gas through the pipe that the time period between two successive pulses corresponds to the time which is required for filling the pipe with unused gas.
Description
.5 The invention relates to a plasma coating method.
More particularly, it relates to a method for coatlng the interior of glass or ceramic pipes by means of a reactive separation or deposition of a gas flowing through the pipe which is dissociated by an electrical gas discharge over the total pipe length to be coated.
In the plasma coating method, the flowing gas is ionized and its molecules are dissociated. Although the ionization degree is low, rarely exceeding 1%, the degree of dissociation may reach high values between 50%
and 100%. The dissociated components form new molecules on the pipe wall which constitute the new coating material.
Plasma coating methods are known from the state of the art (see, e.g., German Offenlegungsschrift 23 28 930, German Patentschrift 24 44 100, German Offenlegungsschrift 26 42 949, German Offenlegungsschrift 27 12 993 and German Offenlegungsschrift 28 04 125). In these methods, the gas discharge plasma is generated in a short zone with respect to the total pipe length and this plasma zone 2Q is axially displaced, so as to obtain a uniform coating over a certain pipe length of about one meter. These known plasma coating methods all require a relative movement between the plasma exciting device and the pipe to be coated.
Moreover, the device for the mechanical relative movement is expensive and requires frequent maintenance.
It is therefore an object of the invention to provide a plasma coating method wherein the coa~ing is carried out simultaneously over the total pipe length with a high reaction yield. The difficulty in such a method - \
is that the introduced gas is already consumed at the beginning of the pipe in a burning discharge over the to-tal pipe length.
One possibility for obtaining a uniform coa-ting over the total pipe length would be to burn the gas discharge in such a weak manner that the degree of dissociation remains low, so that a sufficient amount of unconsumed gas remains for the other pipe end. This solution is disadvan-tageous in that the unconsumed gas is discharged, and that the reaction yield, as well as the coating speea,is low.
Tests with gas discharge pulses have shown that the degree of dissociation depends on the average electrical power input, and not on the pulsing ratio, if the only condition maintained is that the pulse length is not longer than the time which the gas needs to pass through the plasma zone. The subject of the invention makes uses of this result and provides a gas discharge pulse with a small pulsing ratio of about 0~01 to 0.1, wherein the pulse length equals the transit time of the gas through the length of the pipe.
By this measure, it is assured that unconsumed gas is available throughout the total discharge space for each individual discharge.
The generation of long plasma columns which extend over the total pipe length to be coated may be obtained with the assistance of microwave pulses or with electrical direct or alterna-te field coils.
When microwaves are used, the coaxial system consisting of the plasma column~ glass pipe and metal pipe is used as the wave conductor.
~ - .
os A longitudinal field may be applied by simple interiorly-disposed elec-trodes which are applied in the proximity of the pipe ends~or by exteriorly-disposed electrodes, if sufficiently high field frequencies are available.
The advantages of the inventive method are that simple discharge geometries may be used and that a dis-placement of the plasma exciting device is not required.
One embodiment of the invention, wherein a quartz glass pipe is coated with dopes SIO2 with an average microwave output of 500 W~ in accordance with the invention, is described in conjunction with the appended drawing.
In the drawing, a cross-sectional view of the apparatus used in conjunction with the method embodying the invention is illustrated.
Referring now in detail to the drawing, a quartz pipe 1 (inside diameter 1 cm~ length 1 m) is disposed coaxially within a heatable high-grade steel pipe 2~ the diameter of which is 9 cm. The electrical energy for the plasma generation is supplied by two magnetrons (Type YJ1500, frequency 2450 ~Hz) which are operated with syn-chronous current pulses. The microwave energy is in-tro-duced via two pins 3 and 3a. In this manner, two ~ -waves are excited which are polarized perpendicularly with respect to each other, so that a mutual interference of the two magnetrons is prevented. The flow speed of the gases (SiC14+O2+GeC14, total pressure 10 Torr) is 10 m/s. Con~
sequently, the pulse length has a dura-tion of 100 ms. The pulse power of each magnetron is 5kW. At a pulse duration of 5 ms, the median total power is 500 W.
s Any inhomogeneity of the coa-ting in the longi-tudinal direction which is caused by the axial pressuxe gradient in the flowing gas can be reduced by setting an uneven pulse power of the two magnetrons.
Thus, while only one embodiment of the present invention has been shown and described, it will be obvious that many changes and modifications may be made thereunto;
without departing from the spirit and scope of the invention.
_ ~ ~
More particularly, it relates to a method for coatlng the interior of glass or ceramic pipes by means of a reactive separation or deposition of a gas flowing through the pipe which is dissociated by an electrical gas discharge over the total pipe length to be coated.
In the plasma coating method, the flowing gas is ionized and its molecules are dissociated. Although the ionization degree is low, rarely exceeding 1%, the degree of dissociation may reach high values between 50%
and 100%. The dissociated components form new molecules on the pipe wall which constitute the new coating material.
Plasma coating methods are known from the state of the art (see, e.g., German Offenlegungsschrift 23 28 930, German Patentschrift 24 44 100, German Offenlegungsschrift 26 42 949, German Offenlegungsschrift 27 12 993 and German Offenlegungsschrift 28 04 125). In these methods, the gas discharge plasma is generated in a short zone with respect to the total pipe length and this plasma zone 2Q is axially displaced, so as to obtain a uniform coating over a certain pipe length of about one meter. These known plasma coating methods all require a relative movement between the plasma exciting device and the pipe to be coated.
Moreover, the device for the mechanical relative movement is expensive and requires frequent maintenance.
It is therefore an object of the invention to provide a plasma coating method wherein the coa~ing is carried out simultaneously over the total pipe length with a high reaction yield. The difficulty in such a method - \
is that the introduced gas is already consumed at the beginning of the pipe in a burning discharge over the to-tal pipe length.
One possibility for obtaining a uniform coa-ting over the total pipe length would be to burn the gas discharge in such a weak manner that the degree of dissociation remains low, so that a sufficient amount of unconsumed gas remains for the other pipe end. This solution is disadvan-tageous in that the unconsumed gas is discharged, and that the reaction yield, as well as the coating speea,is low.
Tests with gas discharge pulses have shown that the degree of dissociation depends on the average electrical power input, and not on the pulsing ratio, if the only condition maintained is that the pulse length is not longer than the time which the gas needs to pass through the plasma zone. The subject of the invention makes uses of this result and provides a gas discharge pulse with a small pulsing ratio of about 0~01 to 0.1, wherein the pulse length equals the transit time of the gas through the length of the pipe.
By this measure, it is assured that unconsumed gas is available throughout the total discharge space for each individual discharge.
The generation of long plasma columns which extend over the total pipe length to be coated may be obtained with the assistance of microwave pulses or with electrical direct or alterna-te field coils.
When microwaves are used, the coaxial system consisting of the plasma column~ glass pipe and metal pipe is used as the wave conductor.
~ - .
os A longitudinal field may be applied by simple interiorly-disposed elec-trodes which are applied in the proximity of the pipe ends~or by exteriorly-disposed electrodes, if sufficiently high field frequencies are available.
The advantages of the inventive method are that simple discharge geometries may be used and that a dis-placement of the plasma exciting device is not required.
One embodiment of the invention, wherein a quartz glass pipe is coated with dopes SIO2 with an average microwave output of 500 W~ in accordance with the invention, is described in conjunction with the appended drawing.
In the drawing, a cross-sectional view of the apparatus used in conjunction with the method embodying the invention is illustrated.
Referring now in detail to the drawing, a quartz pipe 1 (inside diameter 1 cm~ length 1 m) is disposed coaxially within a heatable high-grade steel pipe 2~ the diameter of which is 9 cm. The electrical energy for the plasma generation is supplied by two magnetrons (Type YJ1500, frequency 2450 ~Hz) which are operated with syn-chronous current pulses. The microwave energy is in-tro-duced via two pins 3 and 3a. In this manner, two ~ -waves are excited which are polarized perpendicularly with respect to each other, so that a mutual interference of the two magnetrons is prevented. The flow speed of the gases (SiC14+O2+GeC14, total pressure 10 Torr) is 10 m/s. Con~
sequently, the pulse length has a dura-tion of 100 ms. The pulse power of each magnetron is 5kW. At a pulse duration of 5 ms, the median total power is 500 W.
s Any inhomogeneity of the coa-ting in the longi-tudinal direction which is caused by the axial pressuxe gradient in the flowing gas can be reduced by setting an uneven pulse power of the two magnetrons.
Thus, while only one embodiment of the present invention has been shown and described, it will be obvious that many changes and modifications may be made thereunto;
without departing from the spirit and scope of the invention.
_ ~ ~
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a method for coating the interior of an electrically non-conductive pipe by means of a reactive deposition from a gas flowing through the pipe of the type wherein the gas is dissociated by an electrical gas discharge and wherein the deposition occurs simultaneously throughout the total pipe length, the improvement com-prising the step of:
employing pulse discharges having a pulse length which is adjusted to the transit time of the gas flowing through the pipe so that the time period between two successive pulses corresponds to the time which is required for filling the pipe with unused gas.
employing pulse discharges having a pulse length which is adjusted to the transit time of the gas flowing through the pipe so that the time period between two successive pulses corresponds to the time which is required for filling the pipe with unused gas.
2. The method according to Claim 1, additionally including the step of coaxially mounting the total length of the pipe which is to be coated in a metal pipe and wherein said gas discharge is generated with microwaves.
3. The method according to Claim 1 or 2, additionally including the step of introducing the microwave power at various places along the pipe axis of the pipe to be coated.
4. The method according to Claim 1, wherein said gas discharge is generated by an electrical longitudinal field which extends at least over the total pipe length to be coated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3010314A DE3010314C2 (en) | 1980-03-18 | 1980-03-18 | Process for the internal coating of electrically non-conductive pipes by means of gas discharges |
| DEP3010314.1-45 | 1980-03-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1151105A true CA1151105A (en) | 1983-08-02 |
Family
ID=6097520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000373275A Expired CA1151105A (en) | 1980-03-18 | 1981-03-18 | Gas-discharge method for coating the interior of electrically non-conductive pipes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4349582A (en) |
| EP (1) | EP0036191B1 (en) |
| JP (1) | JPS56139672A (en) |
| CA (1) | CA1151105A (en) |
| DE (1) | DE3010314C2 (en) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD161137A3 (en) * | 1980-12-04 | 1985-02-20 | Hochvakuum Dresden Veb | METHOD AND DEVICE FOR THE ION-BASED COATING OF ELECTRICALLY INSULATING SUBSTRATES |
| DE3204846A1 (en) * | 1982-02-11 | 1983-08-18 | Schott Glaswerke, 6500 Mainz | PLASMA PROCESS FOR THE INTERNAL COATING OF GLASS TUBES |
| DE3222189A1 (en) * | 1982-06-12 | 1984-01-26 | Hans Dr.Rer.Nat. 5370 Kall Beerwald | Plasma process for coating the interior of tubes with dielectric material |
| US4401507A (en) * | 1982-07-14 | 1983-08-30 | Advanced Semiconductor Materials/Am. | Method and apparatus for achieving spatially uniform externally excited non-thermal chemical reactions |
| US4490408A (en) * | 1983-03-14 | 1984-12-25 | Tektronix, Inc. | Method and device for metallizing the internal surface of a hollow object |
| CH659346A5 (en) * | 1983-05-10 | 1987-01-15 | Balzers Hochvakuum | DEVICE FOR TREATING THE INTERNAL WALL OF A TUBE. |
| US5034265A (en) * | 1983-08-01 | 1991-07-23 | Washington Research Foundation | Plasma gas discharge treatment for improving the compatibility of biomaterials |
| EP0154483B1 (en) * | 1984-03-03 | 1989-12-27 | Stc Plc | Improved pulsed plasma process |
| EP0154482B1 (en) * | 1984-03-03 | 1990-05-16 | Stc Plc | Coating process |
| US4632842A (en) * | 1985-06-20 | 1986-12-30 | Atrium Medical Corporation | Glow discharge process for producing implantable devices |
| US4718907A (en) * | 1985-06-20 | 1988-01-12 | Atrium Medical Corporation | Vascular prosthesis having fluorinated coating with varying F/C ratio |
| GB2208656B (en) * | 1985-06-29 | 1990-01-17 | Stc Plc | Pulsed radio frequency plasma apparatus and process |
| DE3524799A1 (en) * | 1985-07-11 | 1987-01-22 | Siemens Ag | Process for preparing a treated surface layer, and molecular sieve membrane prepared according to this process |
| DE3622614A1 (en) * | 1986-07-05 | 1988-01-14 | Philips Patentverwaltung | METHOD FOR PRODUCING ELECTRICALLY CONDUCTIVE MOLDED BODIES BY PLASMA-ACTIVATED CHEMICAL DEPOSITION FROM THE GAS PHASE |
| DE3632748A1 (en) * | 1986-09-26 | 1988-04-07 | Ver Foerderung Inst Kunststoff | Method of coating hollow bodies |
| DE3700633C2 (en) * | 1987-01-12 | 1997-02-20 | Reinar Dr Gruen | Method and device for the gentle coating of electrically conductive objects by means of plasma |
| DE3830089A1 (en) * | 1988-09-03 | 1990-03-15 | Schott Glaswerke | Process for the production of planar glass substrates provided with dielectric coating systems |
| DE3926023A1 (en) * | 1988-09-06 | 1990-03-15 | Schott Glaswerke | CVD COATING METHOD FOR PRODUCING LAYERS AND DEVICE FOR CARRYING OUT THE METHOD |
| DE3929604A1 (en) * | 1988-09-12 | 1990-03-15 | Schott Glaswerke | INTERNAL COATING OF A TUBE |
| DE3830364C1 (en) * | 1988-09-07 | 1990-01-18 | Schott Glaswerke, 6500 Mainz, De | |
| KR930011413B1 (en) | 1990-09-25 | 1993-12-06 | 가부시키가이샤 한도오따이 에네루기 겐큐쇼 | Plasma cvd method for using pulsed waveform |
| DE4034211C1 (en) * | 1990-10-27 | 1991-11-14 | Schott Glaswerke, 6500 Mainz, De | Coating interior of pipe-glass tube - comprises coupling HF energy to tube using resonator to deliver pulsed microwave discharges |
| US5223308A (en) * | 1991-10-18 | 1993-06-29 | Energy Conversion Devices, Inc. | Low temperature plasma enhanced CVD process within tubular members |
| US6022602A (en) * | 1994-01-26 | 2000-02-08 | Neomecs Incorporated | Plasma modification of lumen surface of tubing |
| DE19634795C2 (en) * | 1996-08-29 | 1999-11-04 | Schott Glas | Plasma CVD system with an array of microwave plasma electrodes and plasma CVD processes |
| NL1032463C2 (en) * | 2006-09-08 | 2008-03-11 | Draka Comteq Bv | Method for manufacturing an optical preform. |
| US7967945B2 (en) * | 2008-05-30 | 2011-06-28 | Yuri Glukhoy | RF antenna assembly for treatment of inner surfaces of tubes with inductively coupled plasma |
| US20100174245A1 (en) * | 2009-01-08 | 2010-07-08 | Ward Dean Halverson | System for pretreating the lumen of a catheter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL163085B (en) * | 1950-08-03 | Siemens Ag | SWITCHING DEVICE FOR TRANSMISSION OF MESSAGES ON A TRANSMISSION ROAD CONSISTING OF SEVERAL PARALLEL CONNECTED LINES. | |
| CH342980A (en) * | 1950-11-09 | 1959-12-15 | Berghaus Elektrophysik Anst | Process for the diffusion treatment of pipes made of iron and steel or their alloys |
| NL6509968A (en) * | 1965-07-31 | 1967-02-01 | ||
| DE2416379A1 (en) * | 1974-04-04 | 1975-11-27 | Metallgesellschaft Ag | Metal pipes internally coated with plastics - in continuous plant with walking beam to convey pipes |
| GB1603949A (en) * | 1978-05-30 | 1981-12-02 | Standard Telephones Cables Ltd | Plasma deposit |
| US4262035A (en) * | 1980-03-07 | 1981-04-14 | Bell Telephone Laboratories, Incorporated | Modified chemical vapor deposition of an optical fiber using an rf plasma |
-
1980
- 1980-03-18 DE DE3010314A patent/DE3010314C2/en not_active Expired
-
1981
- 1981-03-04 US US06/240,539 patent/US4349582A/en not_active Expired - Lifetime
- 1981-03-13 EP EP81101855A patent/EP0036191B1/en not_active Expired
- 1981-03-18 JP JP3801281A patent/JPS56139672A/en active Granted
- 1981-03-18 CA CA000373275A patent/CA1151105A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3010314C2 (en) | 1982-01-07 |
| JPS56139672A (en) | 1981-10-31 |
| EP0036191A1 (en) | 1981-09-23 |
| US4349582A (en) | 1982-09-14 |
| DE3010314B1 (en) | 1981-02-05 |
| JPH0317908B2 (en) | 1991-03-11 |
| EP0036191B1 (en) | 1984-05-23 |
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