一种SMD石英晶体谐振器的整板结构
By using a ceramic base plate and a metal cover plate structure, and employing 3D printing and laser welding technologies, the problems of low production efficiency and complex processes of SMD quartz crystal resonators have been solved, achieving efficient, low-cost large-scale production and product consistency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MDH TECH CO LTD
- Filing Date
- 2025-09-10
- Publication Date
- 2026-07-17
AI Technical Summary
Existing SMD quartz crystal resonators have low production efficiency and complex processing technology. It is difficult to process quartz crystal cavities on ceramic substrates, resulting in a high scrap rate and easy alignment deviations during installation.
The structure uses a ceramic base plate and a metal cover plate. A cavity is formed on the metal plate by additive 3D printing or CNC machining. The cavity corresponds one-to-one with the quartz crystal base and is fixed by laser welding. The plate is split synchronously to form a single resonator.
It improves production efficiency and yield, reduces material costs, enhances structural stability and reliability, ensures product consistency and efficient separation, and is suitable for large-scale production.
Smart Images
Figure CN224521020U_ABST
Abstract
Claims
1. A structure of a whole board of an SMD quartz crystal resonator, characterized by: The system includes a ceramic base plate (100) and a metal cover plate (200). The ceramic base plate (100) includes a plurality of quartz crystal bases arranged in a matrix. Each quartz crystal base has an electrode on its back side and an annular metallization coating (14) on its front side. The annular metallization coating (14) contains a first dispensing platform (12) and a second dispensing platform (13) for wafer dispensing. Quartz wafers (17) are disposed on the first dispensing platform (12) and the second dispensing platform (13). The metal plate cover (200) is provided with a plurality of cavities (210) arranged in a matrix. The cavities (210) are used to cover the quartz wafer (17). The cavities (210) are arranged in a one-to-one correspondence with the quartz crystal base. The metal plate cover (200) is fastened to the ceramic plate base (100).
2. The monolithic structure of SMD quartz crystal resonators according to claim 1, characterized in that: The cavity includes a top cover (201) that protrudes in the middle and a side wall (202) that bends downward. The side wall (202) has an outward bending portion (203) at its edge. The bending portions (203) of two adjacent cavities (210) are connected to form a groove (220). The groove (220) is arranged in a crisscross pattern.
3. The structure of claim 2, wherein: The bent portion (203) is welded to the annular metallized coating (14).
4. The structure of claim 2, wherein: The width of the groove (220) is 0.2 to 0.5 mm.
5. The structure according to any one of claims 1 to 4, wherein: The inner width of the cavity (210) is 1.5 to 3.0 mm, and the inner length of the cavity (210) is 2.0 to 5.0 mm.
6. The structure of the whole plate of SMD quartz crystal resonator according to any one of claims 1 to 4, characterized in that: The depth of the cavity (210) is 0.15 to 0.50 mm.
7. The structure according to any one of claims 1 to 4, wherein: the SMD quartz crystal resonator is a 5 MHz crystal resonator. The ceramic plate base plate (100) has a ceramic crack line (10) on its back and / or front, and the metal plate cover plate (200) has a metal crack line (230) in the center of its groove (220), with the ceramic crack line (10) and the metal crack line (230) corresponding in position.
8. The bulk structure of SMD quartz crystal resonator according to any one of claims 1 to 4, characterized in that: The back of the quartz crystal base is provided with a first electrode (5), a second electrode (6), a third electrode (7) and a fourth electrode (8). The first dispensing platform (12) and the second dispensing platform (13) are electrically connected to the third electrode (7) and the first electrode (5) respectively. The annular metallized coating (14) is electrically connected to the second electrode (6) and the fourth electrode (8).
9. The structure of claim 8, wherein: The quartz crystal base is provided with a first through hole (1), a second through hole (2), a third through hole (3) and a fourth through hole (4). The annular metallized coating (14) is connected to the second electrode (6) and the fourth electrode (8) arranged diagonally through the second through hole (2) and the fourth through hole (4), respectively. The first dispensing platform (12) and the second dispensing platform (13) are connected to the third electrode (7) and the first electrode (5) arranged diagonally through the third through hole (3) and the first through hole (1), respectively.
10. The structure of claim 7, wherein: A through hole (16) is provided at the intersection of the four adjacent quartz crystal bases, and the ceramic crack line (10) passes through the center of the through hole (16).