CN101404485B - Lamination sheet type wave filter and method for producing the same - Google Patents
Lamination sheet type wave filter and method for producing the same Download PDFInfo
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- CN101404485B CN101404485B CN2008100462664A CN200810046266A CN101404485B CN 101404485 B CN101404485 B CN 101404485B CN 2008100462664 A CN2008100462664 A CN 2008100462664A CN 200810046266 A CN200810046266 A CN 200810046266A CN 101404485 B CN101404485 B CN 101404485B
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Abstract
The invention belongs to the technical field of electronic components and relates to a multi-layer chip filter and a preparation method thereof. The filter leads in ceramics and ferrite in the same chip and simultaneously realizes large inductance and large capacitance; wherein, the inductance consists of a hollow inductance (a 'magnetic core' is a ceramic material) and a magnetic core induction (the magnetic chip is ferrite material). The hollow inductance is characterized by small inductance value, large quality factor, high self-resonance frequency, and the like, thus being capable of better broadening the working frequency section of the filter; the magnetic core inductance has the characteristics of large inductance value, low self-resonance frequency, and the like, thus better reducing the in-band insertion loss of a filter with a low cut-off frequency and improving the effect of the transmission signal of the filter. The preparation method of the multi-layer chip filter includes the steps such as material preparing, casting, punching, pore filling, conductor printing, chip overlapping, isostatic pressing, gumming, sintering, etc. The filter has the advantages of small size, large rectangle degree, large out-band rejection as well as broad working frequency. The preparation method has high controllability and can be compatible with the technique of the existing chip components.
Description
Technical field
The invention belongs to technical field of electronic components, particularly low cut-off frequency lamination sheet type wave filter of high-performance and preparation method thereof.
Background technology
At present, when the low cut-off frequency lamination sheet type wave filter of development and production small size, mainly adopt dual mode:
(1) unit piece form.
Pure inductance or pure capacitor type, the filter of the type have rectangle degree difference shortcoming;
(2) LC version.
Compare with the unit piece form, LC version is by increasing the element number, improve filter and have rectangle degree and the outer inhibition of band, in order to take into account the inductance in the low cut-off frequency lamination sheet type wave filter of LC version small size, capacitance, usually adopt two kinds of approach: a kind of is to adopt composite material, this composite material has media ceramic and the two property performances of Ferrite Material, promptly have bigger dielectric constant and bigger magnetic permeability, can realize big inductance and big electric capacity simultaneously, but increased the parasitic parameter value simultaneously, thereby cause the filter operating frequency range narrow, shortcomings such as the band outside inhibitory can differ from, operating frequency can only be controlled in the 1500MHz; Another approach is to develop inductance, electric capacity separately, then inductance, two kinds of chips of electric capacity is linked together by the mode of welding, and the filter volume that obtains by this approach is big, fabrication cycle is long, cost is higher.
Summary of the invention
At above problem, main purpose of the present invention is exactly by providing a kind of new low cut-off frequency lamination sheet type wave filter manufacture craft of high-performance small size to realize the making of the low cut-off frequency lamination sheet type wave filter of high-performance small size.
A kind of lamination sheet type wave filter, as shown in Figure 2, be by the synthetic lamination sheet type multiple device of lamination sheet type electric capacity, lamination sheet type air core inductor and lamination sheet type magnetic core inductive bank, has the lamination sheet type structure, intermediate laminate is the lamination sheet type magnetic core inductance for being made by Ferrite Material partly, the lamination sheet type electric capacity of the upper and lower laminate portion of magnetic core inductance for making by ceramic material, the lamination sheet type air core inductor of the laminate portion between lamination sheet type magnetic core inductance and the lamination sheet type electric capacity for making by ceramic material.
Aspect electrical connection, magnetic core inductance and two air core inductors up and down are in series, and one of them air core inductor links to each other with the input terminal electrode of whole filter, and another air core inductor links to each other with the output terminal electrode of whole filter; The upper and lower of magnetic core inductance has three battery lead plates as in the ceramic material lamination of lamination sheet type electric capacity, two termination electrode plates and a ground electrode plate, one of them termination electrode plate links to each other with the input terminal electrode of whole filter, another termination electrode plate links to each other with the output terminal electrode of whole filter, and the ground electrode plate links to each other with the ground electrode of whole filter.
The equivalent electric circuit of lamination sheet type wave filter of the present invention as shown in Figure 4, lamination sheet type magnetic core inductance L that Ferrite Material is made 2 is in series with two air core inductor L1, L3 that ceramic material is made; One of them air core inductor L1 links to each other with the input terminal electrode of whole filter, and another air core inductor L2 links to each other with the output terminal electrode of whole filter; In the ceramic material lamination, the lamination sheet type capacitor C 1, the C2 that are made of termination electrode plate that links to each other with the input terminal electrode of whole filter and ground electrode plate form input filtering electric capacity, and the lamination sheet type capacitor C 3, the C4 that are made of termination electrode plate that links to each other with the output terminal electrode of whole filter and ground electrode plate form the output filter capacitor.
In the technique scheme, the composite construction of ceramic hollow inductance/FERRITE CORE inductance/ceramic hollow inductance can periodically repeat, with the filter inductance structure that realizes that a plurality of air core inductors and a plurality of magnetic core inductance are in series, as shown in Figure 3.
The present invention introduces ceramic material and Ferrite Material in same chip, realize big sense value inductance and Da Rong value electric capacity simultaneously, wherein inductance is made up of two parts: air core inductor (" magnetic core " is ceramic material) and magnetic core inductance (magnetic core is a Ferrite Material), air core inductor has characteristics such as the sense value is little, quality factor are big, self-resonant frequency height, can well broadening filter working frequency range; Magnetic core form inductance has characteristics such as the sense value is big, self-resonant frequency is low, can well reduce the interior Insertion Loss of band of low cut-off filter, improves the effect of filter transmission signals.
A kind of preparation method of lamination sheet type wave filter as shown in Figure 6, may further comprise the steps:
Step 1. batching.Select suitable Ferrite Material and ceramic material prescription, make magnetic permeability between 10～100, Ferrite Material and the ceramic material of dielectric constant between 10～50, these two kinds of materials sinter that the porcelain temperature differs into can not be too big, generally be controlled within 20 degree.
Step 2. curtain coating.The Ferrite Material and the ceramic material that prepare are made casting slurry respectively, and curtain coating goes out ferrite green diaphragm and ceramics green ceramic diaphragm.
Step 3. punching and filling perforation.The ferrite green diaphragm and the part ceramics green ceramic diaphragm of step 2 gained are punched, utilize silver paste to carry out filling perforation then, be used for the connection of different layers inductance coil, through-hole diameter can be selected according to specific requirement.
Step 4. conductor printing.Carry out inductor conductor with ferrite diaphragm after the filling perforation and ceramic diaphragm and print, the ceramic diaphragm that does not punch with part carries out the ground electrode plate or the printing of termination electrode plate conductor of lamination sheet type electric capacity; The raw material of used printed conductor is a silver paste, in conductor thickness control 10 ± 1 micrometer ranges of printing.
Step 5. lamination.With produce the ferrite green diaphragm of conductor and ceramics green ceramic diaphragm and part not the ferrite green diaphragm and the ceramics green ceramic diaphragm of printed conductor carry out lamination according to lamination sheet type wave filter structure of the present invention, lamination sheet type wave filter structural representation of the present invention is shown in Fig. 2,3.
Static pressure such as step 6. grade.The chip-type filter chip of finishing lamination is placed on waits static pressure in the water, so that with the compression moulding tightly of different layers green diaphragm.Preferred Deng hydrostatic pressure condition: pressure 35MPa atmospheric pressure, temperature 50 degree.
Step 7. binder removal and sintering.The lamination sheet type wave filter chip of step 5 gained is placed on carries out binder removal and sintering in binder removal, the sintering furnace, finally obtain ground of the present invention lamination sheet type wave filter.
The present invention compared with prior art, the Insertion Loss-frequency curve of various forms filter as shown in Figure 5, by the comparison to various technology, filter provided by the invention has the following advantages:
Lamination sheet type wave filter of the present invention has that size is little, the rectangle degree is big, band is outer suppresses performance big, operating frequency wide (can control in the 5000MHz).The preparation method of lamination sheet type wave filter of the present invention can carry out the technological parameter adjustment as required, be worth to come the insertion loss to filter, high inhibition degree, operating frequency range to control by the sense value of adjustment hollow inductance, magnetic core inductance and the appearance of electric capacity, can be handling strong, compatible mutually with the process of existing various chip components and parts; In addition, punching and the filling perforation of silver slurry by to ferrite green diaphragm and ceramics green ceramic diaphragm can solve in the common burning well owing to two kinds of different filter chip craze and transfiguration phenomenons that cause of material sintering stress of ferrite and pottery.
Description of drawings
Fig. 1 is basic filter construction principle schematic.Wherein Fig. 1 (a) is a pure inductance mode filter structural principle schematic diagram; Fig. 1 (b) is pure capacitor type filter construction principle schematic; Fig. 1 (c) is a LC mode filter structural principle schematic diagram.
Fig. 2 is a lamination sheet type wave filter structural representation provided by the invention, stacked system is mainly ceramic material/Ferrite Material/ceramic material, ceramic material is used to make electric capacity and air core inductor, and Ferrite Material is used to make the magnetic core inductance, and hollow inductance and magnetic core inductance are formed filter inductance jointly.
Fig. 3 is the lamination sheet type wave filter structural representation with periodic structure provided by the invention, stacked system is expanded and is ceramic material/Ferrite Material/ceramic material/Ferrite Material/ceramic material .../, utilize this periodic structure to realize the filter inductance structure that a plurality of air core inductors and a plurality of magnetic core inductance are in series.
Fig. 4 is the equivalent circuit diagram of lamination sheet type wave filter provided by the invention.
Fig. 5 is various filter Insertion Loss-frequency curve comparison diagram.
Fig. 6 is a lamination sheet type wave filter preparation method's provided by the invention schematic flow sheet.
Embodiment
A kind of lamination sheet type wave filter, as shown in Figure 2, be by the synthetic lamination sheet type multiple device of lamination sheet type electric capacity, lamination sheet type air core inductor and lamination sheet type magnetic core inductive bank, has the lamination sheet type structure, intermediate laminate is the lamination sheet type magnetic core inductance for being made by Ferrite Material partly, the lamination sheet type electric capacity of the upper and lower laminate portion of magnetic core inductance for making by ceramic material, the lamination sheet type air core inductor of the laminate portion between lamination sheet type magnetic core inductance and the lamination sheet type electric capacity for making by ceramic material.
Aspect electrical connection, magnetic core inductance and two air core inductors up and down are in series, and one of them air core inductor links to each other with the input terminal electrode of whole filter, and another air core inductor links to each other with the output terminal electrode of whole filter; The upper and lower of magnetic core inductance has three battery lead plates as in the ceramic material lamination of lamination sheet type electric capacity, two termination electrode plates and a ground electrode plate, one of them termination electrode plate links to each other with the input terminal electrode of whole filter, another termination electrode plate links to each other with the output terminal electrode of whole filter, and the ground electrode plate links to each other with the ground electrode of whole filter.
In the technique scheme, the composite construction of ceramic hollow inductance/FERRITE CORE inductance/ceramic hollow inductance can periodically repeat, with the filter inductance structure that realizes that a plurality of air core inductors and a plurality of magnetic core inductance are in series, as shown in Figure 3.
A kind of preparation method of lamination sheet type wave filter as shown in Figure 6, may further comprise the steps:
Step 1. batching.Select suitable Ferrite Material and ceramic material prescription, make magnetic permeability between 10～100, Ferrite Material and the ceramic material of dielectric constant between 10～50, these two kinds of materials sinter that the porcelain temperature differs into can not be too big, generally be controlled within 20 degree.
Step 2. curtain coating.The Ferrite Material and the ceramic material that prepare are made casting slurry respectively, and curtain coating goes out ferrite green diaphragm and ceramics green ceramic diaphragm.
Step 3. punching and filling perforation.The ferrite green diaphragm and the part ceramics green ceramic diaphragm of step 2 gained are punched, utilize silver paste to carry out filling perforation then, be used for the connection of different layers inductance coil, through-hole diameter can be selected according to specific requirement.
Step 4. conductor printing.Carry out inductor conductor with ferrite diaphragm after the filling perforation and ceramic diaphragm and print, the ceramic diaphragm that does not punch with part carries out the ground electrode plate or the printing of termination electrode plate conductor of lamination sheet type electric capacity; The raw material of used printed conductor is a silver paste, in conductor thickness control 10 ± 1 micrometer ranges of printing.
Step 5. lamination.With produce the ferrite green diaphragm of conductor and ceramics green ceramic diaphragm and part not the ferrite green diaphragm and the ceramics green ceramic diaphragm of printed conductor carry out lamination according to lamination sheet type wave filter structure of the present invention, lamination sheet type wave filter structural representation of the present invention is shown in Fig. 2,3.
Static pressure such as step 6. grade.The chip-type filter chip of finishing lamination is placed on waits static pressure in the water, so that with the compression moulding tightly of different layers green diaphragm.Preferred Deng hydrostatic pressure condition: pressure 35MPa atmospheric pressure, temperature 50 degree.
Step 7. binder removal and sintering.The lamination sheet type wave filter chip of step 5 gained is placed on carries out binder removal and sintering in binder removal, the sintering furnace, finally obtain ground of the present invention lamination sheet type wave filter.
Claims (3)
1. lamination sheet type wave filter, be by the synthetic lamination sheet type multiple device of lamination sheet type electric capacity, lamination sheet type air core inductor and lamination sheet type magnetic core inductive bank, has the lamination sheet type structure, intermediate laminate is the lamination sheet type magnetic core inductance for being made by Ferrite Material partly, the lamination sheet type electric capacity of the upper and lower laminate portion of magnetic core inductance for making by ceramic material, the lamination sheet type air core inductor of the laminate portion between lamination sheet type magnetic core inductance and the lamination sheet type electric capacity for making by ceramic material;
Aspect electrical connection, magnetic core inductance and two air core inductors up and down are in series, and one of them air core inductor links to each other with the input terminal electrode of whole filter, and another air core inductor links to each other with the output terminal electrode of whole filter; The upper and lower of magnetic core inductance is as having three battery lead plates in the ceramic material lamination of lamination sheet type electric capacity: i.e. two termination electrode plates and a ground electrode plate, one of them termination electrode plate links to each other with the input terminal electrode of whole filter, another termination electrode plate links to each other with the output terminal electrode of whole filter, and the ground electrode plate links to each other with the ground electrode of whole filter.
2. lamination sheet type wave filter according to claim 1, it is characterized in that, the composite construction of described ceramic hollow inductance/FERRITE CORE inductance/ceramic hollow inductance can periodically repeat, with the filter inductance structure that realizes that a plurality of air core inductors and a plurality of magnetic core inductance are in series.
3. the preparation method of a lamination sheet type wave filter may further comprise the steps:
Step 1. batching; Select suitable Ferrite Material and ceramic material prescription, make magnetic permeability between 10～100, Ferrite Material and the ceramic material of dielectric constant between 10～50, these two kinds of materials sinter into the porcelain temperature differ be controlled at 20 the degree within;
Step 2. curtain coating; The Ferrite Material and the ceramic material that prepare are made casting slurry respectively, and curtain coating goes out ferrite green diaphragm and ceramics green ceramic diaphragm;
Step 3. punching and filling perforation; The ferrite green diaphragm and the part ceramics green ceramic diaphragm of step 2 gained are punched, utilize silver paste to carry out filling perforation then, be used for the connection of different layers inductance coil;
Step 4. conductor printing; Carry out inductor conductor with ferrite diaphragm after the filling perforation and ceramic diaphragm and print, the ceramic diaphragm that does not punch with part carries out the ground electrode plate or the printing of termination electrode plate conductor of lamination sheet type electric capacity; The raw material of described printed conductor is a silver paste, in conductor thickness control 10 ± 1 micrometer ranges of printing;
Step 5. lamination; The ferrite green diaphragm and the ceramics green ceramic diaphragm of printed conductor do not carry out lamination according to the lamination sheet type wave filter structure with producing the ferrite green diaphragm of conductor and ceramics green ceramic diaphragm and part;
Static pressure such as step 6. grade; The chip-type filter chip of finishing lamination is placed on waits static pressure in the water, so that with the compression moulding tightly of different layers green diaphragm; The described hydrostatic pressure condition that waits is: pressure 35MPa atmospheric pressure, temperature 50 degree.
Step 7. binder removal and sintering; The lamination sheet type wave filter chip of step 5 gained is placed on carries out binder removal and sintering in binder removal, the sintering furnace, finally obtain lamination sheet type wave filter of the present invention.
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| CN2008100462664A CN101404485B (en) | 2008-10-13 | 2008-10-13 | Lamination sheet type wave filter and method for producing the same |
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| CN2008100462664A CN101404485B (en) | 2008-10-13 | 2008-10-13 | Lamination sheet type wave filter and method for producing the same |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101673868A (en) * | 2009-09-22 | 2010-03-17 | 成都宏明电子股份有限公司 | Method for molding multi-layer plate-type array-structure ceramic filter |
| CN101894661B (en) * | 2010-06-25 | 2012-01-04 | 广东风华高新科技股份有限公司 | High-current multilayer chip inductor and manufacturing method thereof |
| CN102163960B (en) * | 2010-11-24 | 2014-04-02 | 电子科技大学 | Multilayer chip filter and preparation method thereof |
| US9129817B2 (en) * | 2013-03-13 | 2015-09-08 | Intel Corporation | Magnetic core inductor (MCI) structures for integrated voltage regulators |
| CN104980118A (en) * | 2014-04-03 | 2015-10-14 | 深圳振华富电子有限公司 | Laminated-type ceramic radio-frequency low pass filter and preparation method therefor |
| CN106995312B (en) * | 2017-05-03 | 2020-07-28 | 中国振华集团云科电子有限公司 | Preparation method of multilayer heterogeneous ceramic high-temperature co-fired L C filter |
| CN108736124B (en) * | 2018-04-03 | 2020-11-10 | 苏州市协诚五金制品有限公司 | Preparation process based on ceramic dielectric filter |
| CN110875728A (en) * | 2018-09-02 | 2020-03-10 | 青岛鼎信通讯股份有限公司 | Power type ceramic filter |
| CN109714015B (en) * | 2018-12-28 | 2021-10-26 | 电子科技大学 | Laminated low-pass filter based on magnetic dielectric composite material |
| CN110087391B (en) * | 2019-04-02 | 2022-05-06 | 成都兴仁科技有限公司 | LTCC local vibration source module and preparation method thereof |
| CN110022133B (en) * | 2019-04-24 | 2022-07-15 | 电子科技大学 | Small inductance coupling type adjustable band-pass filter and preparation method thereof |
| CN111244594B (en) * | 2020-01-17 | 2022-04-26 | 中山大学 | LTCC technology-based design method for broadband harmonic suppression low-pass miniature filter |
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| CN1289180A (en) * | 1999-09-21 | 2001-03-28 | 株式会社村田制作所 | Inductance-capacitance filter |
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- 2008-10-13 CN CN2008100462664A patent/CN101404485B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289180A (en) * | 1999-09-21 | 2001-03-28 | 株式会社村田制作所 | Inductance-capacitance filter |
| CN1356741A (en) * | 2000-11-29 | 2002-07-03 | 株式会社村田制作所 | Multi-layer LC filter |
Non-Patent Citations (2)
| Title |
|---|
| 曾志毅，王浩勤，尉旭波.低温共烧陶瓷（LTCC）技术应用进展.磁性材料及器件38 2.2007,38(2),7. |
| 曾志毅,王浩勤,尉旭波.低温共烧陶瓷(LTCC)技术应用进展.磁性材料及器件38 2.2007,38(2),7. * |
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