WO2009120667A2 - Co-firing of magnetic and dielectric materials for fabricating composite assemblies for circulators and isolators - Google Patents
Co-firing of magnetic and dielectric materials for fabricating composite assemblies for circulators and isolators Download PDFInfo
- Publication number
- WO2009120667A2 WO2009120667A2 PCT/US2009/038049 US2009038049W WO2009120667A2 WO 2009120667 A2 WO2009120667 A2 WO 2009120667A2 US 2009038049 W US2009038049 W US 2009038049W WO 2009120667 A2 WO2009120667 A2 WO 2009120667A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rod
- cylinder
- magnetic
- dielectric
- ceramic
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
-
- 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
- C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
- C04B37/001—Joining burned ceramic articles with other burned ceramic articles or other articles by heating directly with other burned ceramic articles
-
- 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
- C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
- C04B37/008—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of an organic adhesive, e.g. phenol resin or pitch
-
- 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
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
- C04B2237/32—Ceramic
- C04B2237/34—Oxidic
-
- 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
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
- C04B2237/32—Ceramic
- C04B2237/34—Oxidic
- C04B2237/343—Alumina or aluminates
-
- 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
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/76—Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc
Definitions
- Circulators and isolators are passive electronic devices that are used in high-frequency (e.g., microwave) radio frequency systems to permit a signal to pass in one direction while providing high isolation to reflected energy in the reverse direction.
- Circulators and isolators commonly include a disc-shaped assembly comprising a disc-shaped ferrite or other ferromagnetic ceramic element, disposed concentrically within an annular dielectric element.
- a disc-shaped assembly comprising a disc-shaped ferrite or other ferromagnetic ceramic element, disposed concentrically within an annular dielectric element.
- YIG yttrium-iron-garnet
- the annular dielectric element is similarly commonly made of ceramic material.
- a cylinder is formed from a dielectric ceramic material.
- the (unfired or "green") cylinder is then fired in a kiln (commonly referred to simply as "firing").
- the outside surface of the cylinder is then machined to ensure its outside diameter (OD) is of a selected dimension. Achieving precise dimensions in the assembly elements is important because the dimensions affect microwave waveguide characteristics.
- the inside surface of the cylinder is similarly machined to ensure its inside diameter (ID) is of a selected dimension.
- a rod is formed from a magnetic ceramic material.
- the rod is then fired, and at step 24 its surface is machined to a selected OD.
- the rod OD is slightly less than the cylinder OD so that the rod can be fitted securely within the cylinder, as described below. Achieving a close fit that promotes good adhesion between the rod and cylinder is a reason that both the outside surface of the rod and the inside surface of the cylinder are machined to precise tolerances. 19308.0132P1
- step 26 epoxy adhesive is applied to the one or both of the rod and cylinder.
- the rod is inserted inside the cylinder to form a rod-and-cylinder assembly, and the epoxy is allowed to cure (harden), as indicated by step 30.
- the outside surface of the rod-and-cylinder assembly is again machined to a precise OD.
- the rod-and-cylinder assembly is sliced into a number of disc assemblies. Each disc assembly thus comprises a magnetic ceramic disc disposed concentrically within a dielectric ceramic ring. Each disc assembly is typically several millimeters in thickness.
- a method for making a composite magnetic-dielectric disc assembly comprises forming a dielectric ceramic cylinder, forming a magnetic ceramic rod, assembling the magnetic ceramic rod coaxially inside the dielectric ceramic cylinder to form a rod-and-cylinder assembly, firing the rod- and-cylinder assembly, slicing the rod-and-cylinder assembly to form a plurality of composite magnetic-dielectric disc-shaped assemblies.
- the magnetic-dielectric disc assemblies can be used in manufacturing, for example, circulators, isolators or similar electronic components. Accordingly, the method for making disc assemblies can be included as part of a method for making such electronic components.
- FIG. 1 is a flow diagram of a method for fabricating composite magnetic-dielectric disc assemblies, in accordance with the prior art.
- FIG. 2 is a flow diagram of a method for fabricating composite magnetic-dielectric disc assemblies, in accordance with an exemplary embodiment of the present invention.
- FIG. 3 is a perspective view of a dielectric ceramic cylinder, in accordance with the exemplary embodiment. [0011] FIG.
- FIG. 4 is perspective view of a magnetic ceramic rod, in accordance with the exemplary embodiment.
- FIG. 5 is a top plan view of a rod-and-cylinder assembly, illustrating the rod of FIG. 4 inserted in the cylinder of FIG. 3.
- FIG. 6 is a top plan view similar to FIG. 5, showing the rod-and-cylinder assembly after firing.
- FIG. 7 is a perspective view of a plurality of composite magnetic-dielectric disc assemblies sliced from the rod-and-cylinder assembly of FIG. 6.
- FIG. 2 a process for making composite magnetic-dielectric disc assemblies is illustrated by the flow diagram of FIG. 2. Referring briefly to FIGS. 3-7, the process involves a dielectric ceramic cylinder 36 and a magnetic ceramic rod 38.
- cylinder 36 (FIG. 3) is formed from a dielectric ceramic material by any suitable conventional process known in the art for making such elements, i.e., dielectric ceramic elements of the types used in high frequency electronic components.
- rod 38 (FIG. 4) is formed from a magnetic ceramic material by any suitable conventional process.
- rod 38 is sintered by firing it in a kiln (not shown).
- the outside surface of rod 38 is machined to ensure it is of an outside diameter (OD) that is less than the inside diameter (ID) of cylinder 36.
- (the now pre-fired) rod 38 is received in (the unfired or "green") cylinder 36 to form the rod- and-cylinder assembly shown in FIG. 5.
- FIG. 5 is not to scale, note that the OD of rod 38 is slightly smaller than the ID of cylinder 36 to enable rod 38 to be received in cylinder 36.
- cylinder 36 and rod 38 are co-fired. That is, the rod-and-cylinder assembly (FIG. 5) is fired.
- the co-firing temperature is preferably lower than the temperature at which rod 38 was fired at step 44, to ensure that the physical and electrical properties of rod 38 remain unchanged.
- the co- firing temperature can be within the well-known range in which such cylinders are conventionally fired.
- co-firing causes cylinder 36 to shrink around rod 38, thereby securing them together, as shown in FIG. 6.
- the outside surface of the rod-and-cylinder assembly can then be machined to ensure it is of a specified or otherwise predetermined OD.
- the rod-and-cylinder assembly is sliced into composite magnetic- dielectric disc assemblies 56, shown in FIG. 7.
- Composite magnetic-dielectric disc assemblies 56 can be used in manufacturing high frequency electronic components in the same manner as conventionally-produced assemblies of this type.
- the method of the present invention is more economical than conventional methods, as the invention does not involve the use of adhesives.
- Rod 38 is made of yttrium-iron-garnet fired at or above about 1400 degrees C. Suitable material of this type is commercially available from a number of sources, including Trans- Tech, Inc. (a subsidiary of Skyworks Solutions, Inc.) of Adamstown, Maryland. Cylinder 19308.0132P1
- 36 is made of a ceramic material having a composition of MgO-CaO-ZnO-A12O3-TiO2 co-fired with rod 38 at a temperature of about 1310 degrees C.
- Rod 38 is made of calcium and vanadium-doped yttrium-iron-garnet fired at a temperature at or above 1350 degrees C. Suitable material of this type is commercially available from a number of sources, including Trans-Tech, Inc. (a subsidiary of Skyworks Solutions, Inc.) of Adamstown, Maryland. Cylinder 36 is made of a ceramic material having a composition of MgO-CaO-ZnO-A12O3-TiO2 co-fired with rod 38 at a temperature of about 1310 degrees C.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
- Non-Reversible Transmitting Devices (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980110716.4A CN101981753B (en) | 2008-03-26 | 2009-03-24 | Co-firing of magnetic and dielectric materials for fabricating composite assemblies for circulators and isolators |
EP09726061.6A EP2255404B1 (en) | 2008-03-26 | 2009-03-24 | Co-firing of magnetic and dielectric materials for fabricating composite assemblies for circulators and isolators |
JP2011501969A JP2011515998A (en) | 2008-03-26 | 2009-03-24 | Co-firing of magnetic and dielectric materials to produce circulator and isolator composite assemblies |
KR1020107022806A KR101235964B1 (en) | 2008-03-26 | 2009-03-24 | Co-firing of magnetic and dielectric materials for fabricating composite assemblies for circulators and isolators |
HK11108857.2A HK1154701A1 (en) | 2008-03-26 | 2011-08-23 | Method for making a composite magnetic dielectric disc assembly |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/055,416 US7687014B2 (en) | 2008-03-26 | 2008-03-26 | Co-firing of magnetic and dielectric materials for fabricating composite assemblies for circulators and isolators |
US12/055,416 | 2008-03-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009120667A2 true WO2009120667A2 (en) | 2009-10-01 |
WO2009120667A3 WO2009120667A3 (en) | 2009-12-17 |
Family
ID=41114629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2009/038049 WO2009120667A2 (en) | 2008-03-26 | 2009-03-24 | Co-firing of magnetic and dielectric materials for fabricating composite assemblies for circulators and isolators |
Country Status (7)
Country | Link |
---|---|
US (1) | US7687014B2 (en) |
EP (1) | EP2255404B1 (en) |
JP (1) | JP2011515998A (en) |
KR (1) | KR101235964B1 (en) |
CN (1) | CN101981753B (en) |
HK (1) | HK1154701A1 (en) |
WO (1) | WO2009120667A2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013173639A2 (en) | 2012-05-18 | 2013-11-21 | Skyworks Solutions, Inc. | Apparatus and methods related to junction ferrite devices having improved insertion loss performance |
US9793037B2 (en) | 2011-05-06 | 2017-10-17 | Skyworks Solutions, Inc. | Apparatus and methods related to ferrite based circulators |
EP3453682A1 (en) * | 2017-09-08 | 2019-03-13 | Skyworks Solutions, Inc. | Low temperature co-fireable dielectric materials |
US11387532B2 (en) | 2016-11-14 | 2022-07-12 | Skyworks Solutions, Inc. | Methods for integrated microstrip and substrate integrated waveguide circulators/isolators formed with co-fired magnetic-dielectric composites |
US11565976B2 (en) | 2018-06-18 | 2023-01-31 | Skyworks Solutions, Inc. | Modified scheelite material for co-firing |
US11603333B2 (en) | 2018-04-23 | 2023-03-14 | Skyworks Solutions, Inc. | Modified barium tungstate for co-firing |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4590597B2 (en) * | 2008-03-12 | 2010-12-01 | 国立大学法人東北大学 | Shower plate manufacturing method |
US9640849B2 (en) | 2014-07-23 | 2017-05-02 | Skyworks Solutions, Inc. | Impedance matching in very high dielectric constant isolator/circulator junctions |
GB2589253B (en) | 2018-06-21 | 2023-02-01 | Skyworks Solutions Inc | Low firing temperature dielectric materials designed to be co-fired with high bismuth garnet ferrites for miniaturized isolators and circulators |
US11891340B2 (en) | 2018-07-23 | 2024-02-06 | Skyworks Solutions, Inc. | Spinel-based oxides containing magnesium, aluminum and titanium and methods of forming articles having same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS604308A (en) * | 1983-06-23 | 1985-01-10 | Fujitsu Ltd | Production of mic circulator |
GB2235339B (en) * | 1989-08-15 | 1994-02-09 | Racal Mesl Ltd | Microwave resonators and microwave filters incorporating microwave resonators |
JPH06112028A (en) * | 1992-09-30 | 1994-04-22 | Isuzu Motors Ltd | Sintered magnet |
JPH0878284A (en) | 1994-08-31 | 1996-03-22 | Murata Mfg Co Ltd | Composite electronic device and its production |
JP3149831B2 (en) * | 1997-11-07 | 2001-03-26 | 日本電気株式会社 | High frequency integrated circuit and manufacturing method thereof |
JP3206577B2 (en) * | 1999-01-08 | 2001-09-10 | 日本電気株式会社 | Composite substrate type non-reciprocal circuit device and method of manufacturing the same |
DE19958276C1 (en) * | 1999-12-03 | 2001-05-03 | Heraeus Quarzglas | Quartz glass preform production comprises preparing a quartz glass hollow cylinder collapsed on a quartz glass rod containing a dopant and collapsing the cylinder |
US6844789B2 (en) | 2001-11-13 | 2005-01-18 | Raytheon Company | Low temperature co-fired ceramic (LTCC) circulator |
-
2008
- 2008-03-26 US US12/055,416 patent/US7687014B2/en active Active
-
2009
- 2009-03-24 JP JP2011501969A patent/JP2011515998A/en active Pending
- 2009-03-24 WO PCT/US2009/038049 patent/WO2009120667A2/en active Application Filing
- 2009-03-24 EP EP09726061.6A patent/EP2255404B1/en active Active
- 2009-03-24 KR KR1020107022806A patent/KR101235964B1/en active IP Right Grant
- 2009-03-24 CN CN200980110716.4A patent/CN101981753B/en active Active
-
2011
- 2011-08-23 HK HK11108857.2A patent/HK1154701A1/en unknown
Non-Patent Citations (1)
Title |
---|
See references of EP2255404A4 * |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9793037B2 (en) | 2011-05-06 | 2017-10-17 | Skyworks Solutions, Inc. | Apparatus and methods related to ferrite based circulators |
WO2013173639A2 (en) | 2012-05-18 | 2013-11-21 | Skyworks Solutions, Inc. | Apparatus and methods related to junction ferrite devices having improved insertion loss performance |
EP2850688A4 (en) * | 2012-05-18 | 2016-01-20 | Skyworks Solutions Inc | Apparatus and methods related to junction ferrite devices having improved insertion loss performance |
US9711835B2 (en) | 2012-05-18 | 2017-07-18 | Skyworks Solutions, Inc. | Apparatus and methods related to junction ferrite devices having improved insertion loss performance |
US11387532B2 (en) | 2016-11-14 | 2022-07-12 | Skyworks Solutions, Inc. | Methods for integrated microstrip and substrate integrated waveguide circulators/isolators formed with co-fired magnetic-dielectric composites |
US11804642B2 (en) | 2016-11-14 | 2023-10-31 | Skyworks Solutions, Inc. | Integrated microstrip and substrate integrated waveguide circulators/isolators formed with co-fired magnetic-dielectric composites |
EP3453682A1 (en) * | 2017-09-08 | 2019-03-13 | Skyworks Solutions, Inc. | Low temperature co-fireable dielectric materials |
US11081770B2 (en) | 2017-09-08 | 2021-08-03 | Skyworks Solutions, Inc. | Low temperature co-fireable dielectric materials |
US11715869B2 (en) | 2017-09-08 | 2023-08-01 | Skyworks Solutions, Inc. | Low temperature co-fireable dielectric materials |
US11603333B2 (en) | 2018-04-23 | 2023-03-14 | Skyworks Solutions, Inc. | Modified barium tungstate for co-firing |
US11958778B2 (en) | 2018-04-23 | 2024-04-16 | Allumax Tti, Llc | Modified barium tungstate for co-firing |
US11565976B2 (en) | 2018-06-18 | 2023-01-31 | Skyworks Solutions, Inc. | Modified scheelite material for co-firing |
Also Published As
Publication number | Publication date |
---|---|
CN101981753B (en) | 2014-04-09 |
KR101235964B1 (en) | 2013-02-21 |
EP2255404A4 (en) | 2011-10-12 |
EP2255404B1 (en) | 2013-10-02 |
WO2009120667A3 (en) | 2009-12-17 |
KR20100123764A (en) | 2010-11-24 |
EP2255404A2 (en) | 2010-12-01 |
US20090243163A1 (en) | 2009-10-01 |
HK1154701A1 (en) | 2012-04-27 |
JP2011515998A (en) | 2011-05-19 |
CN101981753A (en) | 2011-02-23 |
US7687014B2 (en) | 2010-03-30 |
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