CN220421789U - Laser welding sealing quartz crystal resonator - Google Patents
Laser welding sealing quartz crystal resonator Download PDFInfo
- Publication number
- CN220421789U CN220421789U CN202321756177.5U CN202321756177U CN220421789U CN 220421789 U CN220421789 U CN 220421789U CN 202321756177 U CN202321756177 U CN 202321756177U CN 220421789 U CN220421789 U CN 220421789U
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- metal
- welding
- quartz crystal
- upper cover
- bottom plate
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- 239000013078 crystal Substances 0.000 title claims abstract description 43
- 238000003466 welding Methods 0.000 title claims abstract description 43
- 238000007789 sealing Methods 0.000 title claims abstract description 37
- 239000010453 quartz Substances 0.000 title claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 56
- 238000004021 metal welding Methods 0.000 claims abstract description 33
- 239000000919 ceramic Substances 0.000 claims abstract description 32
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 229910000679 solder Inorganic materials 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 abstract description 8
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- 239000003292 glue Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910000833 kovar Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- 229920005989 resin Polymers 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- -1 zigbee Chemical compound 0.000 description 1
Abstract
The utility model relates to a laser welding sealing quartz crystal resonator which comprises a ceramic base, a metal upper cover and a quartz crystal, wherein the ceramic base comprises a metal welding sealing ring and a ceramic bottom plate, the metal welding sealing ring is arranged at the upper end of the ceramic bottom plate, an embedded groove is formed in an opening at the upper end of the metal welding sealing ring, a stepped structure is formed between the embedded groove and an inner hole of the metal welding sealing ring, the metal upper cover is arranged in the embedded groove, laser welding is adopted between the metal welding sealing ring and the metal upper cover, and a sealing cavity for packaging is jointly formed by the metal upper cover, the ceramic bottom plate and the metal welding sealing ring, and the quartz crystal is arranged at the bottom of the sealing cavity. The utility model is convenient for visual positioning of laser welding, effectively reduces the defect of the stress structure of the crystal resonator caused by high energy accumulation of the welding line of the laser welding, and inhibits the problem of poor characteristics of the crystal resonator caused by sputtering of plasma formed by the laser welding to the inner cavity through structural design.
Description
Technical Field
The utility model relates to the technical field of quartz crystal resonators, in particular to a laser-welded quartz crystal resonator.
Background
Along with the development of mobile communication technology, besides the wide application of common wireless communication technologies such as 5G cellular mobile phone communication and WIFI6/7 in daily life, IOT internet of things communication technologies such as Z-Wave, lora, zigbee, UWB and the like are gradually introduced into the consumer communication industry, and because the mobile phone is used as a main application scenario, the development of miniaturization and thinning promotes the integration and encapsulation of multiple chips into one module, which is a core of the wireless communication technology — the crystal resonator serving as a synchronous reference signal has higher requirements.
In view of the trend of the technology, the SIP module requires a smaller size, thinner component thickness, and more stable frequency variation of the crystal resonator, so that the module glue with high temperature and high pressure can be used to package ICs with multiple functions into a module with millimeter square. The challenge encountered by quartz crystal resonators is that after the size is miniaturized, the application scene requirement of an SIP module can be met by using a package structure, the package technology of the existing crystal resonator is selected from the other directions except resistance welding/glass packaging/resin packaging and AuSn packaging, the package using the laser welding technology is due to high-speed production efficiency of the laser welding packaging, high-precision optical path welding spot positioning is superior in the aspect of the production cost of the miniaturized quartz crystal resonator, and meanwhile, most importantly, the high-strength of the laser welding package can withstand the stringent molding condition of SIP module glue (> 150 ℃/>50 MPa), and the structural strength of the package is far from that of the glass packaging and AuSn packaging, so the package technology of the novel quartz crystal resonator is required for laser welding.
At present, in the development process of the laser sealed crystal resonator, the laser is amplified by stimulated radiation, so in the common metal welding process, for example, common kovar alloy is used as a welding material, sharp problems are encountered: 1. laser welding energy penetrates through the metal welding ring, heat and deformation stress conduction influence the crystal, so that the base of the seal welding body is cracked or influenced by deformation stress, and the frequency deviation of the crystal resonator is caused. 2. The plasma formed by laser welding splashes into the inner cavity of the crystal, adheres to the quartz plate of the crystal and the metal electrode, causes a mass loading effect, and causes poor characteristics of the crystal (DLD). This part is also two technical difficulties that the quartz crystal resonator needs to be straight-faced with using the laser welding technology, and is first to be overcome.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a laser welding quartz crystal resonator which can overcome the problems of cracking of a crystal packaging structure, poor frequency deviation and poor laser plume splashing caused by laser welding.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a laser-welded quartz crystal resonator, including ceramic base, metal upper cover and quartz crystal, ceramic base include metal welded seal ring and ceramic bottom plate, ceramic bottom plate upper end install metal welded seal ring, this metal welded seal ring upper end opening part has seted up the embedded groove, embedded groove and metal welded seal ring inner hole form step form structure, metal upper cover install in the embedded groove, metal welded seal ring and metal upper cover between adopt laser welding, metal upper cover, ceramic bottom plate and metal welded seal ring form the sealed cavity of encapsulation jointly, quartz crystal is installed to this sealed cavity bottom.
As a supplement to the technical proposal of the utility model, the metal welding sealing ring is fixed on the ceramic bottom plate by welding.
As a supplement to the technical scheme of the utility model, a welding seam is formed at the joint of the metal welding sealing ring and the metal upper cover.
As a supplement to the technical scheme of the utility model, the upper end of the ceramic base plate is provided with a first terminal positioned in the metal welding sealing ring, the first terminal is connected with the quartz crystal through metal conductive adhesive, the lower end of the ceramic base plate is provided with a second terminal, and the second terminal is connected with the first terminal through a circuit arranged in the ceramic base plate and forms a loop structure.
As a supplement to the technical scheme of the utility model, the upper end face of the metal upper cover is flush with the upper end face of the metal welding sealing ring.
The beneficial effects are that: the utility model relates to a laser welding quartz crystal resonator, which has the following advantages and positive effects compared with the prior art:
1. the stepped structure at the upper part of the metal welding sealing ring can clearly form a visual identification positioning line, so that the visual positioning carrying of the metal upper cover and the accurate grabbing and setting of a laser welding path are facilitated, and the manufacturing and implementation are facilitated;
2. the embedded groove of the metal welding sealing ring is matched with the metal upper cover to form an embedded structure, laser penetration energy is not required to be increased to form a welding line, the surface metal is melted and the welding line is filled with proper energy to form a sealing cavity structure, and the damage and even the breakage of a resonator structure body caused by penetrating laser energy are reduced; finally, when reducing laser welding energy, reduce metal plasma's production to under mosaic structure's effect, stop and restrain laser metal plasma and to the inner chamber splash, reduce the inefficacy defective rate production of the syntonizer DLD class characteristic that the splash formed, promote the practical manufacturing implementation of the utility model.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a top view of the present utility model with the metal top cover removed;
fig. 3 is an enlarged view of a portion of fig. 1 a of the present utility model.
The diagram is: 1. the metal upper cover, 2, ceramic bottom plate, 3, quartz crystal, 4, sealed cavity, 5, metal conductive adhesive, 6, first terminal, 7, metal welding seal ring, 8, second terminal, 9, embedded groove, 10, welding seam.
Detailed Description
The utility model will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the claims appended hereto.
The embodiment of the utility model relates to a laser welding sealing quartz crystal resonator, as shown in fig. 1-3, comprising a ceramic base, a metal upper cover 1 and a quartz crystal 3, wherein the ceramic base comprises a metal welding sealing ring 7 and a ceramic bottom plate 2, the metal welding sealing ring 7 is fixed on the ceramic bottom plate 2 through welding, an embedded groove 9 is formed at an opening at the upper end of the metal welding sealing ring 7, the metal welding sealing ring 7 is directly used as a resonator package wall structure, the embedded groove 9 and an inner hole of the metal welding sealing ring 7 form a stepped structure, the metal upper cover 1 is arranged in the embedded groove 9, the upper end face of the metal upper cover 1 is flush with the upper end face of the metal welding sealing ring 7, laser welding is adopted between the metal welding sealing ring 7 and the metal upper cover 1, the ceramic bottom plate 2 and the metal welding sealing ring 7 jointly form a packaged sealing chamber 4, and the quartz crystal 3 is arranged at the bottom of the sealing chamber 4.
The size of the embedded groove 9 is slightly larger than that of the metal upper cover 1, so that the metal upper cover 1 is accurately mounted on the metal welding seal ring 7, and a mounting structure for embedding is formed.
The joint of the metal welding sealing ring 7 and the metal upper cover 1 is provided with a welding seam 10, so that the metal upper cover has good connection strength and structural stability.
The utility model adopts the laser welding technology, and the laser setting facula center acts on the joint of the metal upper cover 1 and the metal welding sealing ring 7, so that the upper surfaces of the metal upper cover 1 and the metal welding sealing ring 7 are fused and combined, and a sealed chamber 4 of the package is formed.
The stepped structure at the upper part of the metal welding sealing ring 7 can clearly form a visual identification positioning line, so that the visual positioning carrying of the metal upper cover 1 and the accurate grabbing and laser welding path setting of laser visual positioning are facilitated, and the manufacturing and implementation are facilitated; the embedded groove 9 of the metal welding sealing ring 7 is matched with the metal upper cover 1 to form an embedded structure, laser penetration energy is not required to be increased to form a welding line, the surface metal is melted and the welding line 10 is filled with proper energy, so that the structure of the sealing cavity 4 can be formed, and the damage and even the breakage of the resonator structure body caused by penetrating laser energy are reduced; finally, when reducing laser welding energy, reduce metal plasma's production to under mosaic structure's effect, stop and restrain laser metal plasma and to the inner chamber splash, reduce the inefficacy defective rate production of the syntonizer DLD class characteristic that the splash formed, promote the practical manufacturing implementation of the utility model.
The upper end of the ceramic base plate 2 is provided with a first terminal 6 in a metal welding seal ring 7, the first terminal 6 is connected with the quartz crystal 3 through a metal conductive adhesive 5, the lower end of the ceramic base plate 2 is provided with a second terminal 8, and the second terminal 8 is connected with the first terminal 6 through a circuit arranged inside the ceramic base plate 2 and forms a loop structure.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
The foregoing has outlined a laser-welded quartz crystal resonator provided in the present application in detail, and the specific embodiments thereof have been described herein to illustrate the principles and embodiments of the present application, the above examples being provided only to assist in understanding the method of the present application and the core ideas thereof; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (5)
1. The utility model provides a laser welding seals quartz crystal resonator, includes ceramic base, metal upper cover (1) and quartz crystal (3), its characterized in that: the ceramic base include metal welded seal ring (7) and ceramic bottom plate (2), ceramic bottom plate (2) upper end install metal welded seal ring (7), embedded groove (9) have been seted up to this metal welded seal ring (7) upper end opening part, embedded groove (9) and metal welded seal ring (7) hole form the echelonment structure, metal upper cover (1) install in embedded groove (9), metal welded seal ring (7) and metal upper cover (1) between adopt laser welding, metal upper cover (1), ceramic bottom plate (2) and metal welded seal ring (7) form sealed cavity (4) of encapsulation jointly, quartz crystal (3) are installed to this sealed cavity (4) bottom.
2. A laser welded quartz crystal resonator according to claim 1, wherein: the metal welding sealing ring (7) is fixed on the ceramic bottom plate (2) through welding.
3. A laser welded quartz crystal resonator according to claim 1, wherein: and a welding seam (10) is formed at the joint of the metal welding seal ring (7) and the metal upper cover (1).
4. A laser welded quartz crystal resonator according to claim 1, wherein: the upper end of ceramic bottom plate (2) be provided with first terminal (6) in metal solder seal ring (7), this first terminal (6) link to each other with quartz crystal (3) through metal conductive adhesive (5), ceramic bottom plate (2) lower extreme be provided with second terminal (8), connect and form loop construction through the inside circuit that sets up of ceramic bottom plate (2) between this second terminal (8) and first terminal (6).
5. A laser welded quartz crystal resonator according to claim 1, wherein: the upper end face of the metal upper cover (1) is flush with the upper end face of the metal welding sealing ring (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321756177.5U CN220421789U (en) | 2023-07-06 | 2023-07-06 | Laser welding sealing quartz crystal resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321756177.5U CN220421789U (en) | 2023-07-06 | 2023-07-06 | Laser welding sealing quartz crystal resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220421789U true CN220421789U (en) | 2024-01-30 |
Family
ID=89651410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321756177.5U Active CN220421789U (en) | 2023-07-06 | 2023-07-06 | Laser welding sealing quartz crystal resonator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220421789U (en) |
-
2023
- 2023-07-06 CN CN202321756177.5U patent/CN220421789U/en active Active
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