CN109286386A - The filter of integrated varistor - Google Patents
The filter of integrated varistor Download PDFInfo
- Publication number
- CN109286386A CN109286386A CN201811462846.1A CN201811462846A CN109286386A CN 109286386 A CN109286386 A CN 109286386A CN 201811462846 A CN201811462846 A CN 201811462846A CN 109286386 A CN109286386 A CN 109286386A
- Authority
- CN
- China
- Prior art keywords
- filter
- pin
- varistor
- pad
- ceramic shell
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/02—Details
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/19—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator consisting of quartz
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Thermistors And Varistors (AREA)
Abstract
The filter of integrated varistor, the ability of its anti overvoltage that filter can be improved, it can satisfy the requirement that the filter is applied to complex environment, it includes ceramic shell, filter is packaged in the ceramic shell, it is characterized by: being also packaged with varistor in the ceramic shell, the varistor and the filter are arranged in parallel.
Description
Technical field
The present invention relates to wave filter technology field, specially a kind of filter of integrated varistor.
Background technique
Filter is the device being filtered to wave, and currently used filter includes SAW filter, but existing
There is common filter chip in technology not to be able to satisfy the demand of complex environment vulnerable to external environment influence, when filter encounters
Chip is easily damaged when electrostatic and switching overvoltage, such as in dry season, static electricity on human body is up to thousands of or even tens of thousands of volts, hand
The breakdown of chip is easily caused when direct contact chip and is damaged, and sound surface filtering is also easily caused when starting current is higher
The problem of chip in device puncture'ss because of overtension appearance.
Summary of the invention
It is not able to satisfy the demand of complex environment for filter chip existing in the prior art, encounters electrostatic or operated
The problem of chip is easily damaged when voltage, the present invention provides a kind of filters of integrated varistor, and filter can be improved
Anti overvoltage ability, can satisfy by the filter be applied to complex environment requirement.
A kind of filter of integrated varistor comprising ceramic shell is packaged with filter in the ceramic shell,
It is characterized in that: being also packaged with varistor in the ceramic shell, the varistor and the filter are arranged in parallel.
It is further characterized by being provided with cover board, between the ceramic shell and the cover board on the ceramic shell
It is welded to connect, is additionally provided with top pad on the ceramic shell, the top pad is arranged along the filter periphery, described
Chip surface pad is provided on filter；
The varistor is the ceramic block being made of Zinc oxide particles and other metal oxides or polymer spacer, other institutes
Stating metal oxide is one or more of Si, Co, Mn, Cr oxide；
The top pad is arranged in the position that proximal edge is leaned on the ceramic shell；
The chip surface pad includes chip surface pad one, chip surface pad two, and the chip surface pad one passes through
The metal layer one is connect with the filter, and the chip surface pad two is arranged on the filter close to the metal
The position of layer one；
The top pad includes top pad one to top pad eight；
The bottom of the ceramic shell is provided with pin, and the pin includes pin one to pin eight；
The chip surface pad one is connect by lead with top pad one, the top pad one pass through Gold plated Layer with it is described
Pin one connects, input pin of the pin one as the filter, and the upper surface of the varistor passes through the lead
It is connect with the top pad three, the top pad three connects the pin four by the Gold plated Layer, and the pin four is made
For the output grounding leg of the varistor, the chip surface pad two connects the top pad eight by the lead,
The top pad eight connects the pin seven, output pin of the pin seven as the filter by the Gold plated Layer；
It is provided with through-hole in the ceramic shell, metal layer two is coated in the through-hole；
The side end face of the ceramic shell be equipped with groove, the groove be it is arc-shaped, the Gold plated Layer is coated in the groove；
The lead is aluminum steel；
The filter is quartz filter, lithium niobate filter, lithium carbonate filter, any one in BAW crystal filter
Kind；
The metal layer one, metal layer two, Gold plated Layer are conductive material；
The material of the metal layer one is aluminium；
The material of the metal layer two is tungsten；
The material of the Gold plated Layer is gold.
Using above structure of the invention, filter and varistor are encapsulated simultaneously in ceramic shell, and make pressure-sensitive electricity
Resistance and the input terminal of filter are arranged in parallel, and when normal signal passes through, the resistance value of varistor is very big, is equivalent to open circuit, right
Input signal does not influence, when there is overvoltage or transient operation overvoltage in filter input end, varistor and filter
Overvoltage is born simultaneously, but the response time of varistor is nanosecond, when overvoltage is more than the given threshold of varistor
When, the voltage at varistor both ends declines rapidly, can protect filter in this way from the destruction of overvoltage, to improve filter
The ability of the anti overvoltage of wave device meets product for the requirement under complex environment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that cover board is not added in the present invention；
Fig. 2 is the structural schematic diagram that the present invention overlooks；
Fig. 3 is the structural schematic diagram that the present invention looks up.
Specific embodiment
See Fig. 1, Fig. 2, Fig. 3, a kind of filter of integrated varistor comprising ceramic shell 1 and cover board 2, ceramic case
It is connected between body 1 and cover board 2 by seam weld layer, the material of cover board 2 is steel body, the position plating being connected on cover board 2 with ceramic shell 1
There is nickel, the position being connected on ceramic shell 1 with cover board 2 is coated with gold, and the seam weld layer between ceramic shell 1 and cover board 2 passes through strong
It is galvanic to form fine and close nickel billon realization sealing welding, it is packaged with filter 3 in ceramic shell 1, which is quartz
Filter is provided with chip surface pad 4 on filter 3, top pad 5,5 cloth of top pad is additionally provided on ceramic shell 1
It is placed in the position around filter 3 close to 1 edge of ceramic shell, in order to which top pad 5 is connect with other each elements；Ceramic case
Varistor 6 is also packaged in body 1, varistor 6 is by Zinc oxide particles and other metal oxides or polymer spacer structure
At ceramic block, other metal oxides are one or more of Si, Co, Mn, Cr oxides, and the varistor 6 is using existing
Have a technology, varistor 6 is connected on filter 3 by metal layer 1, and the material of metal layer 1 is aluminium, varistor 6 with
Wave filter 3 is arranged in parallel；Chip surface pad 4 includes chip surface pad 1, chip surface pad 2 42, chip surface
Pad 1 is connect by metal layer 1 with filter 3, and chip surface pad 2 42 is arranged on filter 3 close to metal layer
One 7 position, top pad 5 include top pad 1 to top pad 8 58, and the bottom of ceramic shell 1 is provided with pin 9,
Pin 9 includes pin 1 to pin 8 98；
Chip surface pad 1 is connect by lead 10 with top pad 1, and top pad 1 is by Gold plated Layer (in figure
It is not drawn into) it is connect with pin 1, input pin of the pin 1 as filter 3, the upper surface of varistor 6 passes through lead 10
It is connect with top pad 3 53, top pad 3 53 connects pin 4 94, the material of Gold plated Layer by Gold plated Layer (being not drawn into figure)
Matter is golden, output grounding leg of the pin 4 94 as varistor 6, and chip surface pad 2 42 connects top weldering by lead 10
Disk 8 58, top pad 8 58 connect pin 7 97, output pin of the pin 7 97 as filter 3, this implementation by Gold plated Layer
Lead 10 in example is aluminum steel；
It in ceramic shell 1 there are two settings through-hole (being not drawn into figure), is coated with metal layer two (being not drawn into figure) in through-hole, gold
The material for belonging to layer two is tungsten, and the metal layer two of coating is for being grounded in through-hole；The side end face of ceramic shell 1 is equipped with groove 8, recessed
Slot 8 be it is arc-shaped, be coated with Gold plated Layer in groove 8, the material of Gold plated Layer is gold；Top pad, surface pads in the present embodiment,
Filter, pin, through-hole, groove are to need to be configured according to practical client, can satisfy client for each of filter
The requirement of item performance.
That the specific working principle is as follows is described for it: the bottom of varistor 6 is welded on metal layer 1, metal layer 1 and core
Piece surface pads 1 are welded to connect, and chip surface pad 1 connects the lower surface of varistor 6 by metal layer one, are realized
Varistor 6 is with filter input pin 91 in parallel；When the input signal of 3 input terminals of filter, that is, pin 1 is normal letter
Number when, varistor 6 keep high resistant state of value, be equivalent to open circuit, input signal do not influenced, when filter 3 input bring out
When existing overvoltage or transient operation overvoltage, varistor 6 and filter 3 bear overvoltage simultaneously, but the sound of varistor 6
It is nanosecond between seasonable, when overvoltage is more than the given threshold of varistor 6, the voltage at 6 both ends of varistor declines rapidly,
Filter 3 be can protect in this way from the destruction of overvoltage, to improve the ability of the anti overvoltage of filter 3, met
Product is used for the requirement under complex environment.
The present apparatus is packaged using ceramic shell 1, and the seam weld layer between ceramic shell 1 and cover board 2 passes through forceful electric power fluidity
Fine and close alloy is formed to realize air tight structure, the entrance of air and moisture can be effectively blocked, to the pressure inside ceramic shell
Quick resistance 6 and 3 chip of filter form a closed guard space structure, so that the reliability of product is improved, into one
Step enhances the competitiveness of product.
Claims (8)
1. a kind of filter of integrated varistor comprising ceramic shell and cover board, the ceramic shell and the cover board it
Between connected by weld seam layer, be packaged with filter in the ceramic shell, chip surface pad, institute be provided on the filter
It states and is additionally provided with top pad on ceramic shell, the top pad is arranged along the filter periphery, it is characterised in that: described
Varistor is also packaged in ceramic shell, the varistor is connected on the filter by metal layer one, the pressure
Quick resistance and the filter are arranged in parallel.
2. a kind of filter of integrated varistor according to claim 1, which is characterized in that the varistor is served as reasons
The ceramic block that Zinc oxide particles and other metal oxides or polymer spacer are constituted, other described metal oxides be Si, Co,
One or more of Mn, Cr oxide.
3. a kind of filter of integrated varistor according to claim 1, which is characterized in that the filter is quartz
Filter, lithium niobate filter, lithium carbonate filter, any one in BAW crystal filter.
4. according to a kind of described in any item filters of integrated varistor of Claims 2 or 3, which is characterized in that the core
Piece surface pads include chip surface pad one, chip surface pad two, and the chip surface pad one passes through the metal layer
One connect with the filter, and the chip surface pad two is arranged in the position on the filter close to the metal layer one
It sets.
5. a kind of filter of integrated varistor according to claim 4, which is characterized in that the top pad includes
For top pad one to top pad eight, the bottom of the ceramic shell is provided with pin, and the pin includes pin one to pin
Eight, the chip surface pad one is connect by lead with top pad one, the top pad one pass through Gold plated Layer with it is described
Pin one connects, input pin of the pin one as the filter, and the upper surface of the varistor passes through the lead
It is connect with the top pad three, the top pad three connects the pin four by the Gold plated Layer, and the pin four is made
For the output grounding leg of the varistor, the chip surface pad two connects the top pad eight by the lead,
The top pad eight connects the pin seven, output pin of the pin seven as the filter by the Gold plated Layer.
6. a kind of filter of integrated varistor according to claim 5, which is characterized in that the lead is aluminum steel.
7. a kind of filter of integrated varistor according to claim 1, which is characterized in that set in the ceramic shell
It is equipped with through-hole, metal layer two is coated in the through-hole.
8. a kind of filter of integrated varistor according to claim 1, which is characterized in that the side of the ceramic shell
End face be equipped with groove, the groove be it is arc-shaped, the Gold plated Layer is coated in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811462846.1A CN109286386A (en) | 2018-12-03 | 2018-12-03 | The filter of integrated varistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811462846.1A CN109286386A (en) | 2018-12-03 | 2018-12-03 | The filter of integrated varistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109286386A true CN109286386A (en) | 2019-01-29 |
Family
ID=65174016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811462846.1A Pending CN109286386A (en) | 2018-12-03 | 2018-12-03 | The filter of integrated varistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109286386A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040081833A (en) * | 2003-03-17 | 2004-09-23 | 엘지이노텍 주식회사 | Surface acoustic wave filter applying ltcc package |
| CN101232186A (en) * | 2008-01-10 | 2008-07-30 | 上海西艾爱电子有限公司 | High frequency pulse filter with preposition protective circuit |
| CN102412240A (en) * | 2011-10-13 | 2012-04-11 | 武汉华工正源光子技术有限公司 | APD-TIA coaxial photoelectric component with temperature control function and manufacturing method |
| CN104467734A (en) * | 2014-11-07 | 2015-03-25 | 深圳华远微电科技有限公司 | Surface acoustic wave filter for GPS and BDS and miniaturization packaging technology of surface acoustic wave filter |
| CN205845949U (en) * | 2016-08-04 | 2016-12-28 | 锦州七七七微电子有限责任公司 | Sinusoidal signal drives and closed loop controller |
| CN207166467U (en) * | 2017-09-07 | 2018-03-30 | 全讯射频科技(无锡)有限公司 | A kind of wave filter for car key |
| CN207354234U (en) * | 2017-09-07 | 2018-05-11 | 全讯射频科技(无锡)有限公司 | A kind of wave filter for carrying impedance matching |
| CN209250590U (en) * | 2018-12-03 | 2019-08-13 | 全讯射频科技(无锡)有限公司 | A kind of filter of integrated varistor |
-
2018
- 2018-12-03 CN CN201811462846.1A patent/CN109286386A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040081833A (en) * | 2003-03-17 | 2004-09-23 | 엘지이노텍 주식회사 | Surface acoustic wave filter applying ltcc package |
| CN101232186A (en) * | 2008-01-10 | 2008-07-30 | 上海西艾爱电子有限公司 | High frequency pulse filter with preposition protective circuit |
| CN102412240A (en) * | 2011-10-13 | 2012-04-11 | 武汉华工正源光子技术有限公司 | APD-TIA coaxial photoelectric component with temperature control function and manufacturing method |
| CN104467734A (en) * | 2014-11-07 | 2015-03-25 | 深圳华远微电科技有限公司 | Surface acoustic wave filter for GPS and BDS and miniaturization packaging technology of surface acoustic wave filter |
| CN205845949U (en) * | 2016-08-04 | 2016-12-28 | 锦州七七七微电子有限责任公司 | Sinusoidal signal drives and closed loop controller |
| CN207166467U (en) * | 2017-09-07 | 2018-03-30 | 全讯射频科技(无锡)有限公司 | A kind of wave filter for car key |
| CN207354234U (en) * | 2017-09-07 | 2018-05-11 | 全讯射频科技(无锡)有限公司 | A kind of wave filter for carrying impedance matching |
| CN209250590U (en) * | 2018-12-03 | 2019-08-13 | 全讯射频科技(无锡)有限公司 | A kind of filter of integrated varistor |
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