CN104242854A - Method for preparing impedance converter resistant to high and low temperature - Google Patents
Method for preparing impedance converter resistant to high and low temperature Download PDFInfo
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- CN104242854A CN104242854A CN201410453399.9A CN201410453399A CN104242854A CN 104242854 A CN104242854 A CN 104242854A CN 201410453399 A CN201410453399 A CN 201410453399A CN 104242854 A CN104242854 A CN 104242854A
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- parylene
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Abstract
The invention relates to a method for preparing an impedance converter resistant to high and low temperature, and belongs to the technical field of microwave. According to the method, poly-p-xylylene vacuum gas-phase deposition coating is carried out on a whole dry and clean magnetic ring in a vacuum gas-phase deposition method; enameled wires are wound on the coated magnetic ring; the magnetic ring with the enameled wires is welded to a printed board to obtain an impedance converter; the impedance converter is coated in the poly-p-xylylene vacuum gas-phase deposition method to obtain the impedance converter resistant to high and low temperature. The method solves the problem that an existing impedance converter manufacturing method cannot meet application requirements of aerospace products according to characteristics of application environments of the aerospace products, and the impedance converter manufactured in the method is applicable to changes of temperature differences ranging from minus 180 DEG C to 120 DEG C and a work environment with voltage as high as 1000 volts.
Description
Technical field
The present invention relates to a kind of preparation method of high-low temperature resistant impedance transformer, specifically, particularly a kind of preparation method being applied to the high-low temperature resistant impedance transformer of space product, belongs to microwave technical field.
Background technology
Transmission line impedance converter is also called line transformer, and it is wound on magnet ring with transmission line to gain the name.Magnet ring face coat withstand voltage usually lower, for improve impedance transformer voltage endurance can transformer make form in take special preparation method to process.At present, there are following two kinds of conventional impedance transformer preparation methods: a kind of method is to magnet ring leaching insulating varnish, and then around transmission line on magnet ring; Another kind method is around insulating tape on magnet ring, as Kapton Tape, and then around transmission line on it.Usually the impedance transformer after coiling being completed is potted in mould or is encapsulated in Can, plastic package envelope, and the contact producing magnet ring surface and transmission line of wearing and tearing to prevent the displacement of transmission line and magnet ring causes component failure, or unstable properties.
Space product, in the outer space particularly lunar surface environment, adapt to minimum-180 DEG C, the temperature environment of high+120 DEG C, and in so large temperature difference situation, the device of space product can not damage because of the temperature stress of expanding with heat and contract with cold; Meanwhile, impedance transformer operating voltage is up to 1000V, and transmission line and magnet ring all must meet high pressure operation requirements, but, because usual magnet ring face coat is withstand voltage lower, therefore described application demand cannot be met.According to described two kinds of at present conventional impedance transformer preparation methods, mainly insulating varnish infiltration is carried out to magnet ring or insulating tape coated, then the impedance transformer that coiling completes is encapsulated.Described preparation method is owing to being subject to the restriction of material and applied environment, there is many intrinsic defects: first, existing insulating varnish can not adapt to the ambient temperature of-180 DEG C ~+120 DEG C, the moon, can not ensure that the impedance transformer obtained has well stable performance in lunar environment; Secondly, infiltration insulating varnish and coated insulation adhesive tape can increase the volume and weight of impedance transformer, in AEROSPACE APPLICATION, the increase of any weight all means the significantly raising of cost, and installing space restriction is very strict, and these two kinds of modes all can not meet the application demand of space product.Therefore the impedance transformer used in space product can not be continued to use impedance transformer preparation method conventional at present and be prepared.
Summary of the invention
For the defect that prior art exists, the object of the present invention is to provide a kind of preparation method of high-low temperature resistant impedance transformer, described method is according to the feature of space product applied environment, solve the problem that existing impedance transformer manufacture method can not meet space product application demand, the impedance transformer that described method obtains can adapt to the difference variation of-180 DEG C ~+120 DEG C and the operational environment up to 1000V voltage.
The object of the invention is to be achieved through the following technical solutions.
A preparation method for high-low temperature resistant impedance transformer, described method step is as follows:
(1) Parylene (Parylene) vacuum covering is carried out by the magnet ring entirety of vacuum vapor deposition method to dry cleansing;
(2) around enamelled wire on the magnet ring after vacuum covering;
(3) the described magnet ring being wound with enamelled wire is welded in printed board, obtains impedance transformer;
(4) Parylene vacuum covering is carried out to impedance transformer vacuum vapor deposition method, obtain described a kind of high-low temperature resistant impedance transformer;
Wherein, the Parylene coating layer thickness of step (1) and step (2) vacuum covering is respectively 20 μm ~ 25 μm;
Described vacuum vapor deposition method is known technology, meets American army mark MIL-I-46058, and the Parylene application system PDS2060 equipment that SCS company of the U.S. can be used to produce completes; Equipment operating and operation are carried out according to the operation manual of SCS company;
Described magnet ring is aerospace level magnet ring; Enamelled wire is polyimide enameled wire, and operative norm is GB/T6109.6;
Described Parylene is the C type Parylene (Parylene-C) and/or the N-type Parylene (Parylene-N) that meet American army mark MIL-I-46058, is preferably C type Parylene.
Beneficial effect
1. the invention provides a kind of preparation method of high-low temperature resistant impedance transformer, described method adopts Parylene to carry out vacuum moulding machine coating to impedance transformer, reason is: Parylene is a kind of thermoplastic high molecular compound of the uniqueness formed by vacuum moulding machine, this macromolecular material has high dielectric strength, the dielectric strength of 20 μm ~ 25 μm of thick Parylenes is 220V/ μm at direct current in short-term, densification, imperforate homogeneous coating can be formed, thus can form the high-quality protective layer of air-gap-free on magnet ring surface, after Parylene vacuum coated, high dielectric strength insulator layer is formed on magnet ring surface, wearing and tearing between isolation lacquer envelope curve and magnet ring medium, form low-frictional force interface, magnet ring is welded in printed board after enamelled wire and obtains impedance transformer, try again Parylene vacuum coated, then on solder joint and enamelled wire and magnet ring surface form again one deck densification, imperforate homogeneous high insulation resistance coating, which prevent the existing broken skin phenomenon of friction output between enamelled wire and magnet ring, solder joint is protected simultaneously, described method is through twice vacuum coated Parylene, the impedance transformer normal safe work under pulse 1000V state obtained can be ensured completely, meanwhile, Parylene temperature window is wider, and thermal stability is to 275 DEG C, and low temperature resistivity, to-200 DEG C, can store and space applied environment on simultaneous adaptation ground,
2. the invention provides a kind of preparation method of high-low temperature resistant impedance transformer, the Parylene (Parylene) adopted in described method is the usual address of the high polymer to a series of uniqueness, extensive use have three kinds, i.e. N-type Parylene (Parylene-N), C type Parylene (Parylene-C) and D type Parylene (Parylene-D); N-type Parylene is a kind of well dielectric material, and have low-down dielectric loss, high insulation resistance and not with the dielectric constant of frequency change, it is the one that in all Parylenes, penetration capacity is the highest; Good electrical property and physical property combine by C type Parylene, and for moist and other corrosive gas, there is hypotonicity, except real free of pinholes can be provided to cover except shape isolation, C type Parylene is the preferred material of coating Important Circuit plate; The character of D type Parylene is similar to C type Parylene, but has higher temperature capacity; The N-type Parylene vacuum-deposited time is longer than the C type Parylene time, needs additional special frock in the same deposition chamber of PDS2060 equipment simultaneously; C type Parylene operating temperature range meets the requirement of impedance transformer, therefore considers preferred C type Parylene as coating material;
3. the invention provides a kind of preparation method of high-low temperature resistant impedance transformer, described method is advanced, and condition is controlled, and twice vacuum coated is not gained in weight substantially.
Embodiment
Embodiment 1
A preparation method for high-low temperature resistant impedance transformer, described method step is as follows:
(1) magnet ring being used for impedance transformer is cleaned up also vacuum drying, by vacuum vapor deposition method, the vacuum covering of C type Parylene is carried out to magnet ring entirety;
(2) around enamelled wire on the magnet ring after vacuum covering;
(3) magnet ring being wound with enamelled wire is welded in printed board, obtains impedance transformer;
(4) vacuum covering of C type Parylene is carried out to described impedance transformer vacuum vapor deposition method, obtain a kind of high-low temperature resistant impedance transformer.
Wherein, described magnet ring is purchased from state-run 798 factories, and model is Y60-095; Enamelled wire is the polyimide enameled wire meeting GB/T6109.6, and purchased from southwest, Chengdu Electrical Appliances Co., Ltd, diameter is 0.49mm.
The Parylene coating layer thickness of step (1) and the middle vacuum covering of step (2) is respectively 20 μm ~ 25 μm.
Described vacuum vapor deposition method is known technology, meets American army mark MIL-I-46058, and the Parylene application system PDS2060 equipment using SCS company of the U.S. to produce completes; Described equipment operating and operation are carried out according to the operation manual of SCS company; Detailed process is as follows:
Material:
C type Parylene (Parylene-C) is U.S. combinating carbide Products;
Isopropyl alcohol: analyze pure (HG/T 2892);
Coupling agent kh-570: purity > 95%, board is looked in capital, Shen Da chemical plant, Beijing;
Deionized water: resistivity > 10M Ω cm;
Remover: Dow Corning Corporation, model is Micro-90.
Equipment:
Parylene vacuum moulding machine coating machine: PDS2060, SCS company of the U.S. produces;
Water washer: U.S. AAT;
Vacuum drier: Wujiang, Jiangsu SLED-99, has range to be the vacuum meter of 0MPa ~-0.1MPa, temperature > 150 DEG C.
Vacuum vapor deposition method and operating procedure as follows:
(1) cleaning, vacuum drying
Workpiece to be applied washes machine cleaning with water, cleaning fluid is VIGEN SC200, cleaning fluid washes rear rinsed with deionized water 10 times, use the mixed liquor rinsing 3 times of isopropyl alcohol and deionized water again, wherein, the volume ratio of isopropyl alcohol and deionized water is 75:25, and vacuum drying chamber put into by the workpiece to be applied after washing, 55 DEG C of dryings 1 hour, obtain clean dry workpiece;
(2) workpiece to be applied is hung
Machine workpiece to be applied is hung on support web plate; Require when shelving that described workpiece is uniformly distributed as far as possible, between workpiece, minimum spacing can not be less than 12mm, puts into the training sheet of known thickness, for thickness measuring in future at each position of shelving;
(3) apply
1. remover is coated with
Configure with deionized water and described release agent the remover aqueous solution that percentage by volume is 2%, do not need the place of film all to smear one time in described coating machine deposit cavity inwall and the first-class equipment of cold-trap;
2. the support hanging workpiece to be applied is put into described deposit cavity;
3. coating raw material is thrown
Coating layer thickness according to required coating drops into raw material, and PDS2060 deposit cavity volume is about 65L, and inventory is the C type Parylene of every micron coating 6g ~ 12g;
4. coupling agent is thrown
The coupling agent opened on described coating machine adds entrance, adds 2mL ~ 3mL coupling agent kh-570 with pipette or syringe; In operating process note prevent described coupling agent be splashed into eyes and and direct skin contact, to wash one's hands in time after contact;
5. to start shooting coating
The support web plate installed is loaded described coating machine, and the strict coated technique condition given by described coating machine and operating procedure coating, to ensure coating quality.
(4) Parylene coating layer thickness is surveyed
Sheet is accompanied in taking-up, and with coating layer thickness described in miking, determining that described coating meets thickness is 20 μm ~ 25 μm.
The high-low temperature resistant impedance transformer obtained to the present embodiment is tested as follows:
(1) the YD2665 Hi-pot Tester adopting Changzhou to raise son carries out voltage-withstand test, at room temperature described impedance transformer is carried out to the direct current loading of 4000V/10s, measure the leakage current obtained and be less than 1mA, there is not punch-through, illustrate that described impedance transformer can tolerate the high pressure of more than 4000V, the operational environment of 1000V high pressure can be adapted to completely;
(2) in the thermal vacuum tank KM6 horizontal bin of research institute of space technology of Chinese science and technology group ,-195 DEG C ~+135 DEG C thermal vacuum tests of 6.5 circulations have been carried out, before the test, Agilent E5071C vector network analyzer is adopted to carry out the measurement of voltage standing wave ratio and insertion loss to described impedance transformer respectively in test and after test, measurement result shows the voltage standing wave ratio of described impedance transformer in bandwidth of operation and is less than 1.2, insertion loss is less than 0.75dB, and result consistency is good, illustrate that described impedance transformer can adapt to the temperature range of-180 DEG C ~+120 DEG C.
Claims (3)
1. a preparation method for high-low temperature resistant impedance transformer, is characterized in that: described method step is as follows:
(1) Parylene vacuum covering is carried out by the magnet ring entirety of vacuum vapor deposition method to dry cleansing;
(2) on magnet ring after application around enamelled wire;
(3) magnet ring being wound with enamelled wire is welded in printed board, obtains impedance transformer;
(4) Parylene vacuum covering is carried out to impedance transformer vacuum vapor deposition method, obtain a kind of high-low temperature resistant impedance transformer;
The Parylene coating layer thickness of step (1) and the middle vacuum covering of step (2) is respectively 20 μm ~ 25 μm;
Vacuum vapor deposition method meets American army mark MIL-I-46058;
Magnet ring is aerospace level magnet ring; Enamelled wire is polyimide enameled wire, and operative norm is GB/T6109.6;
Parylene is the C type Parylene and/or the N-type Parylene that meet American army mark MIL-I-46058.
2. the preparation method of a kind of high-low temperature resistant impedance transformer according to claim 1, is characterized in that: described Parylene is the C type Parylene meeting American army mark MIL-I-46058.
3. the preparation method of a kind of high-low temperature resistant impedance transformer according to claim 1, is characterized in that: the Parylene application system PDS2060V equipment that described vacuum vapor deposition method uses SCS company of the U.S. to produce completes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410453399.9A CN104242854A (en) | 2014-09-05 | 2014-09-05 | Method for preparing impedance converter resistant to high and low temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410453399.9A CN104242854A (en) | 2014-09-05 | 2014-09-05 | Method for preparing impedance converter resistant to high and low temperature |
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| CN104242854A true CN104242854A (en) | 2014-12-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108424711A (en) * | 2018-04-26 | 2018-08-21 | 东莞新劲电子有限公司 | Electronic shelf label product increases protective coating technique |
| CN110783088A (en) * | 2019-11-26 | 2020-02-11 | 耒阳市亚湘电子科技有限公司 | Production method of network transformer |
| CN115710836A (en) * | 2022-10-24 | 2023-02-24 | 国网浙江省电力有限公司电力科学研究院 | Method for improving insulation aging resistance of vegetable oil paper |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101577526A (en) * | 2009-05-31 | 2009-11-11 | 北京瑞夫艾电子有限公司 | Radio-frequency push-pull power amplifier |
| US20110204995A1 (en) * | 2010-02-23 | 2011-08-25 | Avago Technologies Wireless Ip (Singapore) Pte. Ltd. | Acoustically coupled resonator filter with impedance transformation ratio controlled by resonant frequency difference between two coupled resonators |
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2014
- 2014-09-05 CN CN201410453399.9A patent/CN104242854A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101577526A (en) * | 2009-05-31 | 2009-11-11 | 北京瑞夫艾电子有限公司 | Radio-frequency push-pull power amplifier |
| US20110204995A1 (en) * | 2010-02-23 | 2011-08-25 | Avago Technologies Wireless Ip (Singapore) Pte. Ltd. | Acoustically coupled resonator filter with impedance transformation ratio controlled by resonant frequency difference between two coupled resonators |
Non-Patent Citations (1)
| Title |
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| 黄萍等: "《印制电路组件三防涂覆工艺研究》", 《电子工艺技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108424711A (en) * | 2018-04-26 | 2018-08-21 | 东莞新劲电子有限公司 | Electronic shelf label product increases protective coating technique |
| CN110783088A (en) * | 2019-11-26 | 2020-02-11 | 耒阳市亚湘电子科技有限公司 | Production method of network transformer |
| CN115710836A (en) * | 2022-10-24 | 2023-02-24 | 国网浙江省电力有限公司电力科学研究院 | Method for improving insulation aging resistance of vegetable oil paper |
| CN115710836B (en) * | 2022-10-24 | 2023-12-12 | 国网浙江省电力有限公司电力科学研究院 | Method for improving insulation ageing resistance of vegetable oil paper |
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Application publication date: 20141224 |