EP1527027A1 - Glas-keramik-verbundwerkstoff, keramische folie, schichtverbund oder mikrohybrid mit diesem verbundwerkstoff und verfahren zu dessen herstellung - Google Patents
Glas-keramik-verbundwerkstoff, keramische folie, schichtverbund oder mikrohybrid mit diesem verbundwerkstoff und verfahren zu dessen herstellungInfo
- Publication number
- EP1527027A1 EP1527027A1 EP03722242A EP03722242A EP1527027A1 EP 1527027 A1 EP1527027 A1 EP 1527027A1 EP 03722242 A EP03722242 A EP 03722242A EP 03722242 A EP03722242 A EP 03722242A EP 1527027 A1 EP1527027 A1 EP 1527027A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glass
- weight
- ceramic
- composite material
- matrix
- 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.)
- Ceased
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 239000000919 ceramic Substances 0.000 title claims abstract description 36
- 239000011521 glass Substances 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000011159 matrix material Substances 0.000 claims abstract description 17
- 239000000945 filler Substances 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 239000010703 silicon Substances 0.000 claims abstract description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000002241 glass-ceramic Substances 0.000 claims description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical group Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 229910018125 Al-Si Inorganic materials 0.000 claims description 5
- 229910018520 Al—Si Inorganic materials 0.000 claims description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 229910007857 Li-Al Inorganic materials 0.000 claims description 3
- 229910008447 Li—Al Inorganic materials 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 229910052738 indium Inorganic materials 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 3
- 229910010100 LiAlSi Inorganic materials 0.000 claims 1
- 229910052787 antimony Inorganic materials 0.000 claims 1
- 150000004767 nitrides Chemical class 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 229910017083 AlN Inorganic materials 0.000 abstract 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 19
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 5
- 229910052912 lithium silicate Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 101100346656 Drosophila melanogaster strat gene Proteins 0.000 description 1
- 229910018068 Li 2 O Inorganic materials 0.000 description 1
- 229910008290 Li—B Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- QLJCFNUYUJEXET-UHFFFAOYSA-K aluminum;trinitrite Chemical compound [Al+3].[O-]N=O.[O-]N=O.[O-]N=O QLJCFNUYUJEXET-UHFFFAOYSA-K 0.000 description 1
- 229910052661 anorthite Inorganic materials 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- GWWPLLOVYSCJIO-UHFFFAOYSA-N dialuminum;calcium;disilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] GWWPLLOVYSCJIO-UHFFFAOYSA-N 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- -1 silver Chemical class 0.000 description 1
- 238000003826 uniaxial pressing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C03C14/00—Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix
- C03C14/004—Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix the non-glass component being in the form of particles or flakes
-
- 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
- C03C2214/00—Nature of the non-vitreous component
- C03C2214/20—Glass-ceramics matrix
Definitions
- the invention relates to a glass-ceramic composite material, a ceramic film, a ceramic layer composite or a micro hybrid with this glass-ceramic composite material and a method for producing the composite material or the components comprising the same according to the type of the independent claims.
- Substrate materials for LTCC applications have been developed in recent years primarily with the aim of reducing the sintering temperature in order to cofiring, ie sintering the entire composite in one step, with low-melting metals such as silver, while maintaining compatibility with the metal, and further aimed to improve the dielectric properties of the LTCC substrates, particularly for high-frequency applications, and to increase their thermal conductivity with regard to heat dissipation from the LTCC substrates.
- a glass-aluminum nitride composite material is known from EP 0 499 865 A1, which has a comparatively high thermal conductivity at a low sintering temperature and good dielectric properties.
- This composite material is based on a glass powder with silicon dioxide, aluminum oxide, boron oxide and an alkaline earth metal oxide such as MgO, CaO or SrO, to which aluminum nitride has been added as a ceramic powder component.
- an alkaline earth metal oxide such as MgO, CaO or SrO
- cordierite is used in the case of MgO and CaO in the case of using Anorthite is formed, while the glass matrix is depleted of silicon, magnesium and aluminum.
- the object of the present invention was to provide a glass-ceramic composite material, in particular a substrate material for LTCC applications, which can be processed into a ceramic film or used in a ceramic layer composite or in a micro hybrid, and which has a high overall thermal conductivity, if possible in the Range from 8 W / mK to 12 W / mK.
- the glass-ceramic composite material according to the invention has the advantage over the prior art that it is very well suited as a substrate material for LTCC substrates and for the construction of micro-hybrids with such substrates, and that it has a thermal conductivity in comparison with conventional LTCC substrate materials Usually lies between 2 W / mK to 3 W / mK, has significantly increased thermal conductivity, in particular in the favorable range from 8 W / mK to 12 W / mK.
- a ceramic layer composite produced with the glass-ceramic composite material according to the invention or a micro hybrid based on an LTCC substrate with this glass-ceramic composite material thus offers the possibility of saving thermal vias and achieving a higher integration density.
- the silver that is usually used for filling the thermal vias is also partially saved by reducing the number thereof.
- the ceramic filler is aluminum nitride, which has an average powder particle size of 100 nm to 10 ⁇ m, in particular 1 ⁇ m to 10 ⁇ m, having.
- the filler can be uncoated aluminum nitride, which has, for example, an average particle size of 1 ⁇ m to 3 ⁇ m or, preferably, coated aluminum nitride with an average particle size of, for example, 6 ⁇ m to 7 ⁇ m, the coating preferably having a hydrophobic surface modification or an oxygen-containing one Surface coating is.
- the aluminum nitride powder used has an oxygen content of 0.5% by weight to 2.0% by weight, in particular due to the oxygen-containing surface coating, it generally being the case that a lower oxygen content leads to an increased thermal conductivity of the aluminum nitride ceramic powder used leads.
- the matrix has a Li-Al-Si 2 0 3 mixed crystal and / or a Li-Al-Si oxynitride and / or a Li-Al silicate and / or a lithium silicate as crystalline phase as the crystalline phase , and also consists of a residual glass phase in which nitrogen can be dissolved at least in small proportions. It is particularly advantageous if the matrix contains as little or as little lithium silicate as possible.
- the proportion of the ceramic filler in the composite material is preferably between 25 vol.% And 70 vol.%, In particular 30 vol.% To 50 vol.%.
- a thermal conductivity in the desired range of 8 W / mK to 12 W / mK can be set particularly easily via the filler components.
- FIG. 1 shows a top view of a micro hybrid with an LTCC film as the ceramic substrate.
- FIG. 1 shows a micro hybrid 5, known in principle, with a ceramic substrate 10 in the form of an LTCC film or an LTCC layer composite, the sub- strat 10 has thermal feedthroughs 14, so-called “thermal vias” in some areas, which pass through the substrate 10 and which are filled with a metal, for example silver. with which conductor tracks 12 guided on the upper side of the substrate 10 can be contacted from the lower side of the substrate 10. Finally, a printed resistor 13, which is likewise connected to the printed conductor tracks 12, is shown as an example on the upper side of the substrate 10.
- the core of the invention is the provision of a glass-ceramic composite material for producing the substrate 10 according to FIG. 1.
- a glass is first made from a starting mixture with 20% by weight to 68% by weight SiO 2 , 10% by weight to 25% by weight A1 2 0 3 , 5% by weight to 25% by weight Li 2 0.0% by weight % to 33% by weight B 2 0 3 , 0% by weight to 10% by weight P 2 0 5 , 0% by weight to 10% by weight Sb 2 0 3 and 0% by weight to 3% by weight Zr0 2 melted.
- the starting mixture preferably consists of 48 wt.% To 66 wt.% SiO 2 , 14 wt.% To 22 wt.% A1 2 0 3 , 4 wt.% To 20 wt.% Li 2 0. 0 wt.% To 20 %
- constituents B 2 0 3 , P 2 0 5 , Sb 2 0 3 and Zr0 2 these are particularly preferred in a proportion of 3% by weight to 20% by weight of B 2 0 3 and / or 2% by weight 5% by weight of P 2 0 5 and / or 1% by weight to 5% by weight of Sb 2 0 3 and / or 1% by weight to 2% by weight of Zr0 2 were added.
- the starting mixture consists of 65% by weight Si0 2 , 15% by weight A1 2 0 3 and 20% by weight Li 2 0.
- the starting mixture consists of 65% by weight Si0 2 , 15% by weight A1 2 0 3 , 12% by weight Li 2 0 and 8% by weight B 2 0 3 .
- the starting mixture consists of 50% by weight Si0 2 , 16% by weight A1 2 0 3 , 12% by weight Li 2 0 and 20% by weight B 2 0 3 .
- the starting mixture consists of 65% by weight SiO 2 , 21% by weight A1 2 0 3 , 4% by weight Li 2 O, 4% by weight B 2 0 3 , 4% by weight P 2 0 5 and 2% by weight Zr0 2 .
- a matrix which contains lithium, silicon, aluminum and oxygen and which has at least one crystalline phase in some areas.
- This crystalline phase is, for example, a Li-Al-Si 2 0 3 mixed crystal, a Li-Al-Si oxynitride, a Li-Al silicate, a lithium silicate or a plurality of such crystalline phases.
- the non-crystalline areas of the matrix further form a residual glass phase in which nitrogen can be dissolved in small proportions.
- the powder components used in the starting mixture are first homogenized and melted at temperatures between 1200 ° C and 1600 ° C. After the melt has been homogenized, it is then poured off, for example, in water, i.e. fritted, and the glass thus obtained is ground until an average grain size of approximately 1 ⁇ m to 5 ⁇ m, for example 3 ⁇ m, is present. Subsequently, powdered aluminum nitride with an average particle size of 100 nm to 10 ⁇ m, preferably 1 ⁇ m to 10 ⁇ m, is added to this glass powder as a ceramic filler.
- one of the glass powders described above and aluminum nitride powder as the ceramic filler is homogenized in an organic solvent such as isopropanol, the powder mixture obtained in this way is first dried and then subjected to a shaping, for example uniaxial pressing.
- the resulting compact is then sintered in air, nitrogen or a gas mixture containing oxygen and / or nitrogen at temperatures of at most 1050 ° C., so that finally a densely sintered glass-ceramic composite material is obtained, in which in a glass-like matrix has crystalline phases in some areas, which are embedded in ceramic aluminum nitride particles.
- the thermal conductivity of this glass-ceramic composite was then determined using the "hot-disc method". It was found that this depends on the proportion of the ceramic filler added.
- the thermal conductivity in the glass-ceramic composite material increases with an increasing proportion of aluminum nitrite.
- the stagnant value of the thermal conductivity with a composition of 65 vol.% Glass and 35 vol.% Aluminum nitride is attributed to a high proportion of crystalline lithium silicate formed. It is therefore advantageous if the glass-ceramic composite material contains as little or no lithium silicate as possible.
- the test for crystalline phases within the matrix of the glass-ceramic composite and the detection of these phases were carried out by X-ray diffractometry and scanning electron microscopy.
- a ceramic layer composite or the micro-hybrid 5 with the substrate 10 from the above-described glass-ceramic composite material one of the described glasses is first produced, ground to the described grain size and mixed with the described ceramic filler aluminum nitride. Thereafter, further components known per se, such as a solvent, an organic binder and preferably also a dispersant, are preferably added to the powder mixture, and the mixture is shaped, in particular to form a film, a layer or a layer composite. The shaping is then preferably followed by debinding and then sintering of the film, layer or layer composite at a maximum of 1050 ° C. in air, nitrogen or a gas mixture containing oxygen and / or nitrogen.
- further components known per se such as a solvent, an organic binder and preferably also a dispersant
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10234364 | 2002-07-27 | ||
DE10234364A DE10234364B4 (de) | 2002-07-27 | 2002-07-27 | Glas-Keramik-Verbundwerkstoff, dessen Verwendung als keramische Folie, Schichtverbund oder Mikrohybrid und Verfahren zu dessen Herstellung |
PCT/DE2003/001034 WO2004016559A1 (de) | 2002-07-27 | 2003-03-28 | Glas-keramik-verbundwerkstoff keramische folie schichtverbund oder mikrohybrid mit diesem verbundwerkstoff und verfahren zu dessen herstellung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1527027A1 true EP1527027A1 (de) | 2005-05-04 |
Family
ID=30469139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03722242A Ceased EP1527027A1 (de) | 2002-07-27 | 2003-03-28 | Glas-keramik-verbundwerkstoff, keramische folie, schichtverbund oder mikrohybrid mit diesem verbundwerkstoff und verfahren zu dessen herstellung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060128546A1 (de) |
EP (1) | EP1527027A1 (de) |
JP (1) | JP2005533744A (de) |
DE (1) | DE10234364B4 (de) |
WO (1) | WO2004016559A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013151399A (ja) * | 2012-01-26 | 2013-08-08 | Ngk Insulators Ltd | ガラス−セラミックス複合材料 |
WO2014038230A1 (ja) | 2012-09-10 | 2014-03-13 | 日本碍子株式会社 | ガラス-セラミックス複合材料 |
WO2014155758A1 (ja) | 2013-03-26 | 2014-10-02 | 日本碍子株式会社 | ガラス-セラミックス複合材料 |
US9212087B2 (en) | 2013-03-26 | 2015-12-15 | Ngk Insulators, Ltd. | Glass-ceramics composite material |
KR102649336B1 (ko) * | 2019-09-25 | 2024-03-18 | 주식회사 엘지화학 | 질화알루미늄 소결체의 제조 방법 |
CN114804626B (zh) * | 2022-04-11 | 2023-06-02 | 哈尔滨工业大学(威海) | 一种Li-B-Si-Al-O玻璃体系透波疏水涂层及其制备方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0499865A1 (de) * | 1991-02-04 | 1992-08-26 | Sumitomo Electric Industries, Ltd. | Glas-Aluminiumnitrid Verbundwerkstoff |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50124908A (de) * | 1974-03-22 | 1975-10-01 | ||
JPS6090850A (ja) * | 1983-10-21 | 1985-05-22 | Nippon Electric Glass Co Ltd | 結晶性封着材料の製造方法 |
JPS62287658A (ja) * | 1986-06-06 | 1987-12-14 | Hitachi Ltd | セラミックス多層回路板 |
JPS63315537A (ja) * | 1987-06-16 | 1988-12-23 | Asahi Glass Co Ltd | 焼結体 |
US5141899A (en) * | 1991-08-26 | 1992-08-25 | Aluminum Company Of America | Low dielectric inorganic composition for multilayer ceramic package containing titanium silicate glass and crystal inhibitor |
US5242867A (en) * | 1992-03-04 | 1993-09-07 | Industrial Technology Research Institute | Composition for making multilayer ceramic substrates and dielectric materials with low firing temperature |
US5534470A (en) * | 1994-10-27 | 1996-07-09 | Corning Incorporated | Lithium aluminoborate glass-ceramics |
AU9481798A (en) * | 1997-09-15 | 1999-04-05 | Advanced Refractory Technologies, Inc. | Silica-coated aluminum nitride powders with improved properties and methos for their preparation |
JP4220013B2 (ja) * | 1998-02-13 | 2009-02-04 | 株式会社オハラ | 複合ガラスセラミックスおよびその製造方法 |
JP4158282B2 (ja) * | 1999-07-06 | 2008-10-01 | コニカミノルタオプト株式会社 | 磁気ディスク用結晶化ガラス基板 |
JP3680765B2 (ja) * | 2000-07-21 | 2005-08-10 | 株式会社村田製作所 | 誘電体磁器組成物 |
-
2002
- 2002-07-27 DE DE10234364A patent/DE10234364B4/de not_active Expired - Fee Related
-
2003
- 2003-03-28 WO PCT/DE2003/001034 patent/WO2004016559A1/de active Application Filing
- 2003-03-28 US US10/523,251 patent/US20060128546A1/en not_active Abandoned
- 2003-03-28 JP JP2004528286A patent/JP2005533744A/ja active Pending
- 2003-03-28 EP EP03722242A patent/EP1527027A1/de not_active Ceased
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0499865A1 (de) * | 1991-02-04 | 1992-08-26 | Sumitomo Electric Industries, Ltd. | Glas-Aluminiumnitrid Verbundwerkstoff |
Also Published As
Publication number | Publication date |
---|---|
US20060128546A1 (en) | 2006-06-15 |
DE10234364B4 (de) | 2007-12-27 |
JP2005533744A (ja) | 2005-11-10 |
DE10234364A1 (de) | 2004-02-19 |
WO2004016559A1 (de) | 2004-02-26 |
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