CN102868382B - Coating electrode of SMD (surface mounted device) quartz-crystal resonator - Google Patents

Coating electrode of SMD (surface mounted device) quartz-crystal resonator Download PDF

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Publication number
CN102868382B
CN102868382B CN201210355577.5A CN201210355577A CN102868382B CN 102868382 B CN102868382 B CN 102868382B CN 201210355577 A CN201210355577 A CN 201210355577A CN 102868382 B CN102868382 B CN 102868382B
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coated electrode
crystal resonator
smd
quartz
quartz crystal
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CN102868382A (en
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刘青彦
梁羽杉
杨清明
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CHENGDU KINGBRI FREQUENCY TECHNOLOGY CO LTD
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CHENGDU KINGBRI FREQUENCY TECHNOLOGY CO LTD
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Abstract

The invention discloses a coating electrode of an SMD (surface mounted device) quartz-crystal resonator. The coating electrode is attached to the surface of a wafer and comprises a rectangular area and an arch area connected with the rectangular area. The FDLD index of the coating electrode relative to the SMD quartz-crystal resonator is obviously improved, and the performance of the coating electrode is improved.

Description

A kind of SMD quartz crystal resonator coated electrode
Technical field
The present invention relates to electronic devices and components field, particularly relate to a kind of SMD quartz crystal resonator electrode.
Background technology
Quartz-crystal resonator is the piezoelectric device made with piezoelectric quartz (i.e. crystal), and it not only has high stability physical and chemical performance, and elastic vibration loss is minimum.Compared with other electronic devices and components, piezoelectric quartz crystal also has very high frequency stability and high q-factor, becomes the Important Components of stabilized frequency and selection frequency.Along with the extensive use of digitizer, market proposes higher requirement to the unfailing performance of crystal element and device, the FDLD index of quartz-crystal resonator, what reflect is the difference of quartz-crystal resonator operating frequency with exciting power, the frequency change maximum produced and the difference of minimum value are one of key indexs of the quality of quartz crystal.Prior art adopts rectangle silver-coated electrode, 30 step scannings are carried out from 0.01uW to 500uW in volume production process, for the specification of FDLD< ± 2ppm, its CPK<1.33, can only select by exhaustive test the quality ensureing shipment product, production cost is high.
Summary of the invention
The present invention aims to provide a kind of SMD quartz crystal resonator coated electrode, for improving the FDLD index of SMD quartz crystal resonator, improves the performance of SMD quartz crystal resonator.
For achieving the above object, the present invention realizes by the following technical solutions:
SMD quartz crystal resonator coated electrode disclosed by the invention, 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, and for carrying out 30 step scannings from 0.01uW to 500uW, the specification requirement of FDLD< ±-2ppm, its CPK can reach more than 1.67.
Further, described coated electrode comprises the lower chromium coating, silver coating, the upper chromium coating that are arranged in order from inside to outside; Lower chromium coating can strengthen the adhesive force between coated electrode and wafer, and upper chromium coating can prevent coated electrode oxidation by air before 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 longitudinal 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.
SMD quartz crystal resonator coated electrode provided by the invention, FDLD is improved and has obvious effect, for carrying out 30 step scannings from 0.01uW to 500uW, the specification requirement of FDLD< ±-2ppm, its CPK can reach more than 1.67, process rate significantly promotes, and properties of product are improved; In processing procedure, available protecting wafer surface electrode is not oxidized before packaging; frequency change after encapsulation and aging characteristics are largely increased; equivalence annual aging characteristic can bring up to ± 2.5ppm by former ± 5ppm, and the CPK for frequency can have former >1.33 to rise to >1.67.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is cutaway view of the present invention;
Chromium coating, 4-silver coating, the upper chromium coating of 5-, 6-rectangle region, 7-arch area under 1-wafer, 2-coated electrode, 3-in figure.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the present invention is further elaborated.
As Fig. 1, SMD quartz crystal resonator coated electrode disclosed by the invention, coated electrode 2 is attached to the surface of wafer 1; Coated electrode 2 comprises rectangle region 6 and connected arch area 7.
As Fig. 2, further, coated electrode 2 comprises the lower chromium coating 3, silver coating 4, the upper chromium coating 5 that are 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 longitudinal 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 present invention also can have other various embodiments; when not departing from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.

Claims (4)

1. a 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); Described coated electrode (2) comprises the lower chromium coating (3), silver coating (4), the upper chromium coating (5) that are arranged in order from inside to outside; The thickness of described lower chromium coating (3) is 2 to 3nm; The thickness of described upper chromium coating (5) is 1 to 2nm.
2. 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.
3. SMD quartz crystal resonator coated electrode according to claim 1, is characterized in that: the chord length of described arch area (7) equals longitudinal width of rectangle region (6).
4. SMD quartz crystal resonator coated electrode according to claim 1, is characterized in that: the lateral dimension of described coated electrode (2) is 1.2mm, and longitudinal size is 1.0mm.
CN201210355577.5A 2012-09-21 2012-09-21 Coating electrode of SMD (surface mounted device) quartz-crystal resonator Active CN102868382B (en)

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Publication number Priority date Publication date Assignee Title
CN113824425B (en) * 2021-09-24 2022-03-08 杭州鸿星电子有限公司 Quartz crystal resonator or oscillator and design method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201490982U (en) * 2009-09-09 2010-05-26 安徽铜峰电子股份有限公司 Chip for SMD5032-12MHz crystal resonator
CN101814904A (en) * 2010-04-24 2010-08-25 烟台大明电子有限公司 Quartz crystal resonator and manufacture process thereof
CN201821325U (en) * 2010-09-29 2011-05-04 铜陵市峰华电子有限公司 SMD crystal resonator wafer with composite coating films
CN202197254U (en) * 2011-07-27 2012-04-18 广东惠伦晶体科技股份有限公司 Quartz crystal resonator electrode
CN202872743U (en) * 2012-09-21 2013-04-10 成都晶宝时频技术股份有限公司 SMD quartz crystal resonator film-plated electrode

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8669819B2 (en) * 2010-03-04 2014-03-11 Daishinku Corporation Electronic component package sealing member, electronic component package, and method for manufacturing electronic component package sealing member

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201490982U (en) * 2009-09-09 2010-05-26 安徽铜峰电子股份有限公司 Chip for SMD5032-12MHz crystal resonator
CN101814904A (en) * 2010-04-24 2010-08-25 烟台大明电子有限公司 Quartz crystal resonator and manufacture process thereof
CN201821325U (en) * 2010-09-29 2011-05-04 铜陵市峰华电子有限公司 SMD crystal resonator wafer with composite coating films
CN202197254U (en) * 2011-07-27 2012-04-18 广东惠伦晶体科技股份有限公司 Quartz crystal resonator electrode
CN202872743U (en) * 2012-09-21 2013-04-10 成都晶宝时频技术股份有限公司 SMD quartz crystal resonator film-plated electrode

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