CN202872743U - SMD quartz crystal resonator film-plated electrode - Google Patents
SMD quartz crystal resonator film-plated electrode Download PDFInfo
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- CN202872743U CN202872743U CN 201220484209 CN201220484209U CN202872743U CN 202872743 U CN202872743 U CN 202872743U CN 201220484209 CN201220484209 CN 201220484209 CN 201220484209 U CN201220484209 U CN 201220484209U CN 202872743 U CN202872743 U CN 202872743U
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- coated electrode
- crystal resonator
- smd quartz
- chromium coating
- plated electrode
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Abstract
The utility model discloses an SMD quartz crystal resonator film-plated electrode. The film-plated electrode is adhered on a surface of a wafer. The film-plated electrode comprises a rectangular region and a bow-shaped region connected with the rectangular region. The film-plated electrode has conspicuously improves an EFLF index of the SMD quartz crystal resonator, and improves performance of products.
Description
Technical field
The utility model relates to the electronic devices and components field, relates in particular to a kind of SMD quartz crystal resonator electrode.
Background technology
Quartz-crystal resonator is the piezoelectric device made from piezoelectric quartz (namely quartzy), and it not only has high stability physical and chemical performance, and the elastic vibration loss is minimum.Compare with other electronic devices and components, piezoelectric quartz crystal also has very high frequency stability and high Q value, the Important Components that makes it become stabilized frequency and select frequency.Extensive use along with digitizer, market proposes higher requirement to the unfailing performance of crystal element and device, the FDLD index of quartz-crystal resonator, what reflect is that the quartz-crystal resonator operating frequency is with the difference of exciting power, the frequency change maximum that produces and the difference of minimum value are one of the key indexs of the quality of quartz crystal.Prior art is to adopt the rectangle silver-coated electrode, carries out the scanning of 30 steps from 0.01uW to 500uW in the volume production process, for FDLD<± specification of 2ppm, the quality of shipment product can only be selected to guarantee by exhaustive test in its CPK<1.33, production cost is high.
The utility model content
The utility model aims to provide a kind of SMD quartz-crystal resonator coated electrode, is used for improving the FDLD index of SMD quartz-crystal resonator, improves the performance of SMD quartz-crystal resonator.
For achieving the above object, the utility model is realized by the following technical solutions:
The disclosed SMD quartz-crystal resonator of the utility model coated electrode, coated electrode is attached to the surface of wafer; It is characterized in that: described coated electrode comprises rectangle region and connected arch area; This coated electrode shape is improved for FDLD obvious effect, for carrying out the scanning of 30 steps from 0.01uW to 500uW, and FDLD<±-specification requirement of 2ppm, its CPK can reach more than 1.67.
Further, described coated electrode comprises lower chromium coating, silver coating, the upper chromium coating that is arranged in order from inside to outside; Lower chromium coating can strengthen the adhesive force between coated electrode and the wafer, and upper chromium coating can prevent coated electrode oxidation by air before the quartz-crystal resonator packaging process.
Preferably, the arcuate angle of described arch area is 80 to 100 degree.
Preferably, the chord length of described arch area equals vertical width of rectangle region.
Preferably, the lateral dimension of described coated electrode is 1.2mm, and longitudinal size is 1.0mm.
Preferably, the thickness of described lower chromium coating is 2 to 3nm.
Preferably, the thickness of described upper chromium coating is 1 to 2nm.
The SMD quartz-crystal resonator coated electrode that the utility model provides, improvement has obvious effect for FDLD, for carry out the scanning of 30 steps from 0.01uW to 500uW, FDLD<±-specification requirement of 2ppm, its CPK can reach more than 1.67, process rate significantly promotes, and properties of product are improved; Effectively protection wafer surface electrode is not oxidized in the processing procedure before encapsulation; frequency change and aging characteristics after the encapsulation are largely increased; the equivalence annual aging characteristic can be brought up to ± 2.5ppm by former ± 5ppm, can have former for the CPK of frequency〉1.33 rise to 1.67.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is cutaway view of the present utility model;
Chromium coating, 4-silver coating, the upper chromium coating of 5-, 6-rectangle region, 7-arch area under 1-wafer, 2-coated electrode, the 3-among the figure.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model is further elaborated.
Such as Fig. 1, the disclosed SMD quartz-crystal resonator of the utility model coated electrode, coated electrode 2 is attached to the surface of wafer 1; Coated electrode 2 comprises rectangle region 6 and connected arch area 7.
Such as Fig. 2, further, coated electrode 2 comprises lower chromium coating 3, silver coating 4, the upper chromium coating 5 that is arranged in order from inside to outside.
Preferably, the arcuate angle of arch area 7 is 80 to 100 degree.
Preferably, the chord length of arch area 7 equals vertical width of rectangle region 6.
Preferably, the lateral dimension of coated electrode 2 is 1.2mm, and longitudinal size is 1.0mm.
Preferably, the thickness of lower chromium coating 3 is 2 to 3nm.
Preferably, the thickness of upper chromium coating 5 is 1 to 2nm.
Certainly; the utility model also can have other various embodiments; in the situation that does not break away from spirit of the present utility model and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (7)
1. SMD quartz-crystal resonator coated electrode, coated electrode (2) is attached to the surface of wafer (1); It is characterized in that: described coated electrode (2) comprises rectangle region (6) and connected arch area (7).
2. SMD quartz-crystal resonator coated electrode according to claim 1, it is characterized in that: described coated electrode (2) comprises lower chromium coating (3), silver coating (4), the upper chromium coating (5) that is arranged in order from inside to outside.
3. SMD quartz-crystal resonator coated electrode according to claim 1 is characterized in that: the arcuate angle of described arch area (7) is 80 to 100 degree.
4. SMD quartz-crystal resonator coated electrode according to claim 1, it is characterized in that: the chord length of described arch area (7) equals vertical width of rectangle region (6).
5. SMD quartz-crystal resonator coated electrode according to claim 1, it is characterized in that: the lateral dimension of described coated electrode (2) is 1.2mm, longitudinal size is 1.0mm.
6. SMD quartz-crystal resonator coated electrode according to claim 2 is characterized in that: the thickness of described lower chromium coating (3) is 2 to 3nm.
7. SMD quartz-crystal resonator coated electrode according to claim 2 is characterized in that: the thickness of described upper chromium coating (5) is 1 to 2nm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN 201220484209 CN202872743U (en) | 2012-09-21 | 2012-09-21 | SMD quartz crystal resonator film-plated electrode |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN 201220484209 CN202872743U (en) | 2012-09-21 | 2012-09-21 | SMD quartz crystal resonator film-plated electrode |
Publications (1)
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CN202872743U true CN202872743U (en) | 2013-04-10 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN 201220484209 Expired - Fee Related CN202872743U (en) | 2012-09-21 | 2012-09-21 | SMD quartz crystal resonator film-plated electrode |
Country Status (1)
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102868382A (en) * | 2012-09-21 | 2013-01-09 | 成都晶宝时频技术股份有限公司 | Coating electrode of SMD (surface mounted device) quartz-crystal resonator |
-
2012
- 2012-09-21 CN CN 201220484209 patent/CN202872743U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102868382A (en) * | 2012-09-21 | 2013-01-09 | 成都晶宝时频技术股份有限公司 | Coating electrode of SMD (surface mounted device) quartz-crystal resonator |
CN102868382B (en) * | 2012-09-21 | 2015-05-27 | 成都晶宝时频技术股份有限公司 | Coating electrode of SMD (surface mounted device) quartz-crystal resonator |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20200921 |