CN103698642B - A kind of method preventing SAW (Surface Acoustic Wave) device electrostatic burn in humid test - Google Patents
A kind of method preventing SAW (Surface Acoustic Wave) device electrostatic burn in humid test Download PDFInfo
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- CN103698642B CN103698642B CN201410001479.0A CN201410001479A CN103698642B CN 103698642 B CN103698642 B CN 103698642B CN 201410001479 A CN201410001479 A CN 201410001479A CN 103698642 B CN103698642 B CN 103698642B
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- acoustic wave
- saw
- surface acoustic
- humid test
- conductive container
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- 238000010897 surface acoustic wave method Methods 0.000 title claims abstract description 118
- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000004020 conductor Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 238000010186 staining Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract description 3
- 239000007858 starting material Substances 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 3
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of method preventing SAW (Surface Acoustic Wave) device electrostatic burn in humid test, first SAW (Surface Acoustic Wave) device is put into conductive container, then conducting medium is added with by complete for SAW (Surface Acoustic Wave) device landfill, cover conductive container lid again, finally conductive container is put into temperature testing device, make SAW (Surface Acoustic Wave) device effective grounding in whole humid test process.During taking-up, first SAW (Surface Acoustic Wave) device is cooled to room temperature, then conductive container is taken out, conducting medium is separated by conductive mesh with SAW (Surface Acoustic Wave) device.The present invention makes input, output electrode and ground-electrode effective electric connection in whole humid test process, thoroughly avoids electrostatic accumulation to cause device to burn.This method does not need unit clamp, simple to operation, and cost is low, and starting material have versatility, and protection effect is remarkable.
Description
Technical field
The present invention relates to the protection that SAW (Surface Acoustic Wave) device environmental test is damaged, be specifically related to a kind ofly prevent SAW (Surface Acoustic Wave) device in humid test by the new method that electrostatic is burnt, belong to SAW (Surface Acoustic Wave) device humid test field.
Background technology
SAW (Surface Acoustic Wave) device is the element that in electronic equipment, a class is important, and for choosing the useful signal in passband, the garbage signal outside filtering passband, to improve selectivity and the antijamming capability of equipment.Along with scientific technological advance, SAW (Surface Acoustic Wave) device application surface and use amount increasing.
Because SAW (Surface Acoustic Wave) device is material based on piezoelectric substrate, make specific interdigital electrode to form on surface, piezoelectric substrate has pyroelectric effect, particularly the pyroelectric coefficient of lithium tantalate and lithium niobate is larger, when temperature sharply changes, stronger electrostatic charge can be produced, collected by interdigital transducer, easily cause device interdigital burn, penalty or damage.
SAW (Surface Acoustic Wave) device will reach higher service condition, and to meet rugged surroundings request for utilization, it is two shaker tests that must carry out that stability is baked and banked up with earth with temperature cycles.Wherein stability bakes and banks up with earth (being generally for SAW (Surface Acoustic Wave) device condition: 125 DEG C, 24 hours) object is under the condition not applying stress, determine the impact of high temperature storage on device.Need in process of the test put into or take out product, this process easily causes jump in temperature to produce, if do not take rational electrostatic defending measure easily to produce electrostatic damage.
In addition, temperature cycles (is generally for SAW (Surface Acoustic Wave) device condition :-55 DEG C ~+125 DEG C, circulate 5 times, switching time≤1 minute) object measures device to bear the ability of thermal extremes and extreme low temperature, and thermal extremes and extreme low temperature alternately change the impact on device.In process of the test, temperature sharply changes, and for adopting the SAW (Surface Acoustic Wave) device of lithium tantalate and lithium niobate design of material, due to the pyroelectric effect of wafer itself, the as easy as rolling off a log electrostatic that causes is burnt, and must take rational electrostatic defending measure.
In order to solve electrostatic burning problems, prior art devises multiple clamping apparatus, and the clamping for SAW (Surface Acoustic Wave) device is burnt to prevent the electrostatic of device under temperature variation.Due to fixture machining precision and thickness of detector error, and the inevitable problem such as the distortion of fixture in temperature changing process, all the time there is SAW (Surface Acoustic Wave) device and relating to the electrostatic burning problems in change of temperature test, correspondingly add manufacturing cost, cause larger economic loss.
Summary of the invention
For prior art above shortcomings, the object of this invention is to provide a kind of easy to use, can effectively and at low cost prevent SAW (Surface Acoustic Wave) device in humid test electrostatic burn method.
To achieve these goals, the technical solution used in the present invention is as follows:
Prevent a method for SAW (Surface Acoustic Wave) device electrostatic burn in humid test, comprise SAW (Surface Acoustic Wave) device and put into temperature testing device and take out from temperature testing device;
When SAW (Surface Acoustic Wave) device puts into temperature testing device, first SAW (Surface Acoustic Wave) device is put into conductive container, then in conductive container, conducting medium is added with by complete for SAW (Surface Acoustic Wave) device landfill, covered container lid again, container cover is conductive material, finally the conductive container that SAW (Surface Acoustic Wave) device is housed is put into temperature testing device, make SAW (Surface Acoustic Wave) device effective grounding in whole humid test process; Described conducting medium is graininess or powder shaped;
When SAW (Surface Acoustic Wave) device is taken out from temperature testing device, first SAW (Surface Acoustic Wave) device is cooled to room temperature, then conductive container is taken out, open container cover, conducting medium is separated by conductive mesh with SAW (Surface Acoustic Wave) device.
In described conductive container, outage degree is 4-8 times of SAW (Surface Acoustic Wave) device height, conductive container high/low temperature circulation, have water smoke and icing situation under do not produce rust staining.
Product to be tested is embedded in conducting medium by the present invention, make input, output electrode and ground-electrode effective electric connection in whole humid test process, i.e. SAW (Surface Acoustic Wave) device effective grounding in whole humid test process, thoroughly avoids electrostatic accumulation to cause device to burn.
This method does not need unit clamp, simple to operation, and cost is low, and starting material have versatility, and protection effect is remarkable.
Accompanying drawing explanation
Fig. 1-SAW (Surface Acoustic Wave) device humid test dress of the present invention buries schematic diagram.
Schematic diagram is separated after Fig. 2-SAW (Surface Acoustic Wave) device humid test of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The present invention prevents the method for SAW (Surface Acoustic Wave) device electrostatic burn in humid test, the operation requirements relating generally to operation requirements when SAW (Surface Acoustic Wave) device puts into temperature testing device and take out from temperature testing device.
When SAW (Surface Acoustic Wave) device puts into temperature testing device, first SAW (Surface Acoustic Wave) device 4 is put into conductive container 1 and tile, device is positive and negative, but can not be overlapping.Then the conducting medium 3 adding graininess or powder shaped in conductive container 1 is with by SAW (Surface Acoustic Wave) device 4 landfill completely, covered container lid 2 again, container cover 2 is also conductive material, finally the conductive container that SAW (Surface Acoustic Wave) device is housed is put into temperature testing device, make SAW (Surface Acoustic Wave) device effective grounding in whole humid test process.Dress buries effect as shown in Figure 1.
In application claims conductive container 1, outage degree is the height of 4-8 times of SAW (Surface Acoustic Wave) device, and conductive container high/low temperature circulation, have water smoke and icing situation under do not produce rust staining.In addition, require that the landfill thickness of conducting medium must not lower than the 3-6 of element height doubly.
After humid test completes, when SAW (Surface Acoustic Wave) device is taken out from temperature testing device, first SAW (Surface Acoustic Wave) device 4 is cooled to room temperature, to reduce the probability of electrostatic burn, then conductive container 1 is taken out, open container cover 2, conducting medium 3 is separated by conductive mesh 5 with SAW (Surface Acoustic Wave) device 4, sees Fig. 2.Need during operation to wear antistatic wrist strap, forbid that human body directly touches.
If do not take rational electrostatic defending measure in humid test process, device interface just may be caused unsettled at random, the static charge produced in test can not discharge in time, therefore occurs instantaneous discharge phenomenon in electric performance test process after experiment, causes device electrostatic to be burnt.And the screen cloth separation of this method can with larger probability interface unit interface, the static charge produced in timely release temperature process of the test, therefore occurs that the probability of static charge accumulation device greatly reduces after experiment, so the probability of electrostatic burn significantly reduces.
The above embodiment of the present invention is only for example of the present invention is described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, other multi-form change and variations can also be made on the basis of the above description.Here cannot give exhaustive to all embodiments.Every belong to technical scheme of the present invention the apparent change of amplifying out or variation be still in the row of protection scope of the present invention.
Claims (3)
1. prevent a method for SAW (Surface Acoustic Wave) device electrostatic burn in humid test, comprise SAW (Surface Acoustic Wave) device and put into temperature testing device and take out from temperature testing device, it is characterized in that:
When SAW (Surface Acoustic Wave) device puts into temperature testing device, first SAW (Surface Acoustic Wave) device is put into conductive container, then in conductive container, conducting medium is added with by complete for SAW (Surface Acoustic Wave) device landfill, covered container lid again, container cover is conductive material, finally the conductive container that SAW (Surface Acoustic Wave) device is housed is put into temperature testing device, make SAW (Surface Acoustic Wave) device effective grounding in whole humid test process;
When SAW (Surface Acoustic Wave) device is taken out from temperature testing device, first SAW (Surface Acoustic Wave) device is cooled to room temperature, then conductive container is taken out, open container cover, conducting medium is separated by conductive mesh with SAW (Surface Acoustic Wave) device.
2. the method preventing SAW (Surface Acoustic Wave) device electrostatic burn in humid test according to claim 1, is characterized in that: described conducting medium is graininess or powder shaped.
3. the method preventing SAW (Surface Acoustic Wave) device electrostatic burn in humid test according to claim 1, it is characterized in that: in described conductive container, outage degree is 4-8 times of SAW (Surface Acoustic Wave) device height, the landfill thickness of conducting medium must not lower than 3 of element height times, conductive container high/low temperature circulation, have water smoke and icing situation under do not produce rust staining.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410001479.0A CN103698642B (en) | 2014-01-02 | 2014-01-02 | A kind of method preventing SAW (Surface Acoustic Wave) device electrostatic burn in humid test |
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| CN201410001479.0A CN103698642B (en) | 2014-01-02 | 2014-01-02 | A kind of method preventing SAW (Surface Acoustic Wave) device electrostatic burn in humid test |
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| CN103698642A CN103698642A (en) | 2014-04-02 |
| CN103698642B true CN103698642B (en) | 2016-03-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105372542B (en) * | 2015-12-25 | 2018-06-19 | 中国电子科技集团公司第二十六研究所 | It is a kind of to prevent the SAW device method that electrostatic is burnt in fluorocarbon oil leak test |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6377138B1 (en) * | 1997-07-28 | 2002-04-23 | Kabushiki Kaisha Toshiba | Surface acoustic wave device with a layered conductive film and method of producing the same |
| CN1741378A (en) * | 2004-08-27 | 2006-03-01 | 京瓷株式会社 | Surface acoustic wave device and manufacturing method therefor, and communications equipment |
| CN1765050A (en) * | 2004-03-18 | 2006-04-26 | 株式会社村田制作所 | Surface acoustic wave device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003168943A (en) * | 2001-12-03 | 2003-06-13 | Toshiba Corp | Inspection apparatus and inspection method for surface acoustic wave device, and manufacturing method of surface acoustic wave device |
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- 2014-01-02 CN CN201410001479.0A patent/CN103698642B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6377138B1 (en) * | 1997-07-28 | 2002-04-23 | Kabushiki Kaisha Toshiba | Surface acoustic wave device with a layered conductive film and method of producing the same |
| CN1765050A (en) * | 2004-03-18 | 2006-04-26 | 株式会社村田制作所 | Surface acoustic wave device |
| CN1741378A (en) * | 2004-08-27 | 2006-03-01 | 京瓷株式会社 | Surface acoustic wave device and manufacturing method therefor, and communications equipment |
Non-Patent Citations (1)
| Title |
|---|
| "声表面波器件的研究进展";李晖等;《真空科学与技术》;20010930;第21卷(第5期);第376-380页 * |
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Effective date of registration: 20220606 Address after: No.23 Xiyong Avenue, Shapingba District, Chongqing 401332 Patentee after: CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION CHONGQING ACOUSTIC-OPTIC-ELECTRONIC CO.,LTD. Address before: 400060 Chongqing Nanping Nan'an District No. 14 Huayuan Road Patentee before: CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION NO.26 Research Institute |
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Address after: No.23 Xiyong Avenue, Shapingba District, Chongqing 401332 Patentee after: CETC Chip Technology (Group) Co.,Ltd. Country or region after: China Address before: No.23 Xiyong Avenue, Shapingba District, Chongqing 401332 Patentee before: CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION CHONGQING ACOUSTIC-OPTIC-ELECTRONIC CO.,LTD. Country or region before: China |