CN111224638A - Piezoelectric ceramic frequency discriminator - Google Patents
Piezoelectric ceramic frequency discriminator Download PDFInfo
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- CN111224638A CN111224638A CN201911178587.4A CN201911178587A CN111224638A CN 111224638 A CN111224638 A CN 111224638A CN 201911178587 A CN201911178587 A CN 201911178587A CN 111224638 A CN111224638 A CN 111224638A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 44
- 238000003466 welding Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 238000009395 breeding Methods 0.000 abstract description 3
- 230000001488 breeding effect Effects 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract description 2
- 239000002344 surface layer Substances 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/176—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator consisting of ceramic material
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
The invention relates to a piezoelectric ceramic frequency discriminator, wherein a metal layer is positioned on the outer surface layer of a piezoelectric ceramic piece, and the front surface and the back surface of the piezoelectric ceramic piece are provided with a circular electrode, a shielding area, a shielding wire and a bonding pad, wherein the front surface and the back surface of the piezoelectric ceramic piece are symmetrical; the circular electrode is positioned in the center of the ceramic chip; the shielding region surrounds the electrode up and down to form a ring shape which is symmetrical up and down; the bonding pads are positioned on the left side and the right side of the piezoelectric ceramic piece and are connected with the circular electrodes through electrode connecting wires; the shielding lines on the front side and the back side connect the shielding areas on the front side and the back side through the corresponding ceramic chip edges to form intercommunication, and a complete shielding system is combined to avoid clutter breeding caused by redundant vibration caused by self factors. Compared with the prior art, the invention can effectively reduce the nonlinear distortion and the noise of the product in the circuit application. The problem of the product point wax that the course of working in the point wax process causes is big or the point wax diffusion is to the direct influence of wave form is solved, effectual improvement production efficiency lays the foundation for the miniaturization of product.
Description
Technical Field
The invention belongs to the technical field of electronic components, and particularly relates to a piezoelectric ceramic frequency discriminator.
Background
In the prior art, a piezoelectric ceramic frequency discriminator is mainly applied to the related fields of a high-frequency tuner, a vehicle-mounted sound box, a high-end radio, a television and the like, and generally comprises a piezoelectric ceramic plate, a metal electrode, a metal bonding pad and the like. As an electronic component, it requires quite high precision to the relevant electrical performance parameters such as waveform and frequency, etc., in the production and processing, if the bad conditions such as noise breeding, inflection point, asymmetry, etc. are easily formed due to improper control, which causes the phenomena of large distortion degree, unstable output amplitude, etc. to the use of the client on the computer, the operation is very bad, and simultaneously, the qualification rate of the finished product is also influenced, therefore, whether to design a novel piezoelectric ceramic frequency discriminator to overcome the above defects is a technical problem to be solved by the technicians in the field.
Disclosure of Invention
The invention aims to provide a novel piezoelectric ceramic frequency discriminator which can solve the problem of clutter propagation and distortion degree of a product through a unique structural design and avoid various waveform strange phenomena caused by improper control in a processing process. For example, in the production process, if wax is diffused due to large wax dots in the wax dot procedure, cavities formed on two sides of the ceramic chip are too large, however, noise waves cannot be suppressed cleanly, and interference is caused to subsequent detection and application.
The technical scheme adopted by the invention is as follows:
a piezoelectric ceramic frequency discriminator comprises a piezoelectric ceramic piece, wherein a front circular electrode and a back circular electrode are arranged on the piezoelectric ceramic piece; the front round electrode is connected with the first bonding pad through a front electrode connecting wire, and the second bonding pad is an independent welding area; the reverse circular electrode is connected with the third bonding pad through a reverse electrode connecting wire, and the fourth bonding pad is an independent welding area;
on the front surface, a first shielding area and a second shielding area form surrounding shielding against the front surface circular electrode, a first shielding wire is connected with the first shielding area, and a second shielding wire is connected with the second shielding area and a first edge connecting wire; on the reverse side, a third shielding area and a fourth shielding area form surrounding shielding for the reverse side circular electrode, a third shielding wire is connected with the fourth shielding area, and a fourth shielding wire is connected with the third shielding area and a second edge connecting wire.
Preferably, the length of the piezoelectric ceramic piece is 4.5-6.0 mm, the width of the piezoelectric ceramic piece is 3.5-4.0 mm, and the thickness of the piezoelectric ceramic piece is 0.2-0.25 mm.
Preferably, the front circular electrode and the back circular electrode are both located at the center of the piezoelectric ceramic piece, the projections of the front surface and the back surface are symmetrically overlapped, and the diameter of the front circular electrode and the back circular electrode is 0.9-1.6 mm.
Preferably, the first shielding region and the second shielding region are distributed in a semi-annular shape and are distributed in an up-down symmetrical manner to form a surrounding state for the front circular electrode, and the first shielding region and the second shielding region are not connected with each other; the first shielding region and the second shielding region are the same in shape and size.
Preferably, the third shielding region and the fourth shielding region are distributed in a semi-annular shape and are distributed in an up-down symmetrical manner to form a surrounding state for the reverse circular electrode, and the third shielding region and the fourth shielding region are not connected with each other; the third shielding region and the fourth shielding region have the same shape and size.
Preferably, the projections of the first shielding region and the third shielding region on the front surface and the back surface of the piezoelectric ceramic piece are symmetrically overlapped, and the projections of the second shielding region and the fourth shielding region on the front surface and the back surface of the piezoelectric ceramic piece are symmetrically overlapped.
Preferably, the second shielding region and the second shielding line arranged on the front side are connected with the third shielding line and the fourth shielding region arranged on the back side through the first edge connecting line.
Preferably, the third shielding region and the fourth shielding line arranged on the reverse side are connected with the first shielding line and the first shielding region arranged on the front side through the second edge connecting line.
Preferably, the second bonding pad, the first bonding pad, the third bonding pad and the fourth bonding pad have the same shape and size and are all located at the edge of the width of the piezoelectric ceramic plate; the projections of the second bonding pad and the third bonding pad on the front surface and the back surface of the piezoelectric ceramic piece are symmetrically superposed, and the projections of the first bonding pad and the fourth bonding pad on the front surface and the back surface of the piezoelectric ceramic piece are symmetrically superposed.
Compared with the prior art, the invention has the following advantages:
1. nonlinear distortion and noise of the product in circuit application are effectively reduced;
2. the problem of poor waveform formed in the wax-dispensing process of the product is solved;
3. the generation of redundant clutter is effectively inhibited;
4. provides basic conditions for product miniaturization.
Drawings
FIG. 1 is a schematic perspective view of a piezo-ceramic frequency discriminator according to the present invention;
FIG. 2 is a schematic front view of a piezo-ceramic discriminator according to the present invention;
fig. 3 is a schematic diagram of the reverse side of the piezo-ceramic discriminator according to the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples:
in one embodiment of the invention, as shown in fig. 1, the frequency discriminator mainly comprises a piezoelectric ceramic plate 1, a front circular electrode 2 and a back circular electrode 11 which are arranged at the center of the piezoelectric ceramic plate 1 and are symmetrical on two sides; on the front surface, the front surface circular electrode 2 is connected with a first bonding pad 5 through a front surface electrode connecting wire 3, and a second bonding pad 4 is an independent bonding area; on the reverse side, the circular electrode 11 is connected to a third land 13 through a reverse electrode connection line 12, and a fourth land 14 is an independent land; the front electrode connecting wire 3 and the back electrode connecting wire 12 are positioned on the same horizontal plane, but are different in position and cannot be superposed; on the front surface, the first shielding area 6 and the second shielding area 7 are in a semi-annular shape, a surrounding shielding is formed on the front surface circular electrode 2, but the shielding is not conducted with each other, the first shielding wire 8 is connected with the first shielding area 6, and the second shielding wire 9 is connected with the second shielding area 7 and the first edge connecting wire 10; on the reverse side, the third shielding region 15 and the fourth shielding region 16 are in a semi-annular shape, a surrounding shielding is formed on the reverse side circular electrode 11, but the shielding is not conducted with each other, the third shielding wire 18 is connected with the fourth shielding region 16, the fourth shielding wire 17 is connected with the third shielding region 15 and the second edge connecting wire 19, in addition, the second bonding pad 4, the first bonding pad 5, the third bonding pad 13 and the fourth bonding pad 14 are the same in shape and size and are all located on the edge of the width of the piezoelectric ceramic sheet 1; the projections of the second bonding pad 4 and the third bonding pad 13 on the front and back surfaces of the piezoelectric ceramic plate 1 are completely overlapped, and the projections of the first bonding pad 5 and the fourth bonding pad 14 on the front and back surfaces of the piezoelectric ceramic plate 1 are completely overlapped.
Specifically, the first shielding region 6 and the second shielding region 7 are distributed in a semicircular shape and are distributed in a vertically symmetrical manner to form a surrounding state on the front circular electrode 2 and are not connected with each other, and the third shielding region 15 and the fourth shielding region 16 are distributed in a semicircular shape and are distributed in a vertically symmetrical manner to form a surrounding state on the back circular electrode 11 and are not connected with each other; while the first 6, second 7, third 15 and fourth 16 shielding regions are the same shape and size.
Specifically, the second shielding region 7 and the second shielding line 9 arranged on the front side are connected with the third shielding line 18 and the fourth shielding region 16 arranged on the back side through the first edge connecting line 10 to form conduction; the third shielding region 15 and the fourth shielding line 17 disposed on the reverse side are connected to the first shielding line 8 and the first shielding region 6 disposed on the front side through a second edge connecting line 19 to form conduction.
Specifically, the length of the piezoelectric ceramic plate 1 is 4.5-6.0 mm, the width is 3.5-4.0 mm, the thickness is 0.2-0.25 mm, and the diameters of the front circular electrode 2 and the back circular electrode 11 are 0.9-1.6 mm.
The metal layer is arranged on the outer surface layer of the piezoelectric ceramic piece 1, the designed circular electrodes on the front surface and the back surface are overlapped, and the shape and the size are the same; the shielding areas arranged on the front side and the back side are symmetrical up and down, the shapes and the sizes are the same, orthographic projections of the shielding areas on the front side and the back side are completely overlapped, in addition, the shielding areas on the front side and the back side are connected with edge lines designed on the piezoelectric ceramic piece 1 through shielding lines, the shielding areas on the front side and the back side are connected to form intercommunication, a complete shielding system is combined, and clutter breeding caused by redundant vibration caused by self factors is avoided. Compared with the prior art, the invention can effectively reduce the nonlinear distortion and the noise of the product in the circuit application. The problem of the product point wax that the course of working in the point wax process causes is big or the point wax diffusion is to the direct influence of wave form is solved, effectual improvement production efficiency lays the foundation for the miniaturization of product.
The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.
Claims (9)
1. The piezoelectric ceramic frequency discriminator is characterized by comprising a piezoelectric ceramic piece (1), wherein a front circular electrode (2) and a back circular electrode (11) are arranged on the piezoelectric ceramic piece (1); the front round electrode (2) is connected with the first bonding pad (5) through a front electrode connecting wire (3), and the second bonding pad (4) is an independent welding area; the reverse circular electrode (11) is connected with a third bonding pad (13) through a reverse electrode connecting wire (12), and a fourth bonding pad (14) is an independent welding area;
on the front surface, a first shielding area (6) and a second shielding area (7) are aligned with the round electrode (2) to form surrounding shielding, a first shielding wire (8) is connected with the first shielding area (6), and a second shielding wire (9) is connected with the second shielding area (7) and a first edge connecting wire (10); on the reverse side, a third shielding area (15) and a fourth shielding area (16) form surrounding shielding for the reverse side circular electrode (11), a third shielding wire (18) is connected with the fourth shielding area (16), and a fourth shielding wire (17) is connected with the third shielding area (15) and a second edge connecting wire (19).
2. The frequency discriminator according to claim 1, wherein the piezoelectric ceramic plate (1) has a length of 4.5 to 6.0mm, a width of 3.5 to 4.0mm, and a thickness of 0.2 to 0.25 mm.
3. The piezoceramic frequency discriminator according to claim 1, wherein the front circular electrode (2) and the back circular electrode (11) are both located at the center of the piezoceramic sheet (1) and have symmetrically superposed front and back projections with a diameter of 0.9-1.6 mm.
4. The piezoceramic frequency discriminator according to claim 1, wherein the first shielding region (6) and the second shielding region (7) are semi-annular and distributed symmetrically up and down to surround the front circular electrode (2) and are not connected to each other; the first shielding region (6) and the second shielding region (7) are the same in shape and size.
5. The piezoceramic frequency discriminator according to claim 1, wherein the third shielding region (15) and the fourth shielding region (16) are semi-annular and distributed symmetrically up and down to surround the reverse circular electrode (11) and are not connected to each other; the third shielding region (15) and the fourth shielding region (16) are the same in shape and size.
6. The piezoceramic frequency discriminator according to claim 1, wherein the first shielding region (6) and the third shielding region (15) are symmetrically superposed in projection on the front and back sides of the piezoceramic wafer (1), and wherein the second shielding region (7) and the fourth shielding region (16) are symmetrically superposed in projection on the front and back sides of the piezoceramic wafer (1).
7. A piezoceramic frequency discriminator according to claim 1, characterized in that the second shielding region (7), the second shielding line (9) arranged on the front side are connected to the third shielding line (18), the fourth shielding region (16) arranged on the reverse side by the first edge connecting line (10).
8. A piezoceramic frequency discriminator according to claim 1, characterized in that the third shielding region (15), the fourth shielding line (17) arranged on the opposite side are connected to the first shielding line (8), the first shielding region (6) arranged on the front side by the second edge connecting line (19).
9. A piezoceramic frequency discriminator according to claim 1, characterized in that said second pad (4), said first pad (5), said third pad (13) and said fourth pad (14) have the same shape and size and are all located at the edge of the width of the piezoceramic sheet (1); the second bonding pad (4) and the third bonding pad (13) are symmetrically superposed on the projections of the front surface and the back surface of the piezoelectric ceramic piece (1), and the first bonding pad (5) and the fourth bonding pad (14) are symmetrically superposed on the projections of the front surface and the back surface of the piezoelectric ceramic piece (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911178587.4A CN111224638A (en) | 2019-11-27 | 2019-11-27 | Piezoelectric ceramic frequency discriminator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911178587.4A CN111224638A (en) | 2019-11-27 | 2019-11-27 | Piezoelectric ceramic frequency discriminator |
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| CN111224638A true CN111224638A (en) | 2020-06-02 |
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| CN201911178587.4A Pending CN111224638A (en) | 2019-11-27 | 2019-11-27 | Piezoelectric ceramic frequency discriminator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2558087Y (en) * | 2002-05-10 | 2003-06-25 | 浙江嘉康电子股份有限公司 | Small size piece type piezoelectric element vibrator |
| US20040130241A1 (en) * | 2002-07-22 | 2004-07-08 | Toyo Communicaton Equipment Co., Ltd. | Piezoelectric resonator and the method for making the same |
| CN1728549A (en) * | 2005-06-27 | 2006-02-01 | 严盛喜 | Chip type resonator of high frequency piezoelectric ceramic in small size |
| CN2781647Y (en) * | 2005-01-22 | 2006-05-17 | 浙江嘉康电子股份有限公司 | Piezoelectric ceramic high frequency wave trap vibrator |
| CN105704907A (en) * | 2016-02-22 | 2016-06-22 | 汉得利（常州）电子股份有限公司 | Flexible circuit board for reducing impedance of piezoresonator |
-
2019
- 2019-11-27 CN CN201911178587.4A patent/CN111224638A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2558087Y (en) * | 2002-05-10 | 2003-06-25 | 浙江嘉康电子股份有限公司 | Small size piece type piezoelectric element vibrator |
| US20040130241A1 (en) * | 2002-07-22 | 2004-07-08 | Toyo Communicaton Equipment Co., Ltd. | Piezoelectric resonator and the method for making the same |
| CN2781647Y (en) * | 2005-01-22 | 2006-05-17 | 浙江嘉康电子股份有限公司 | Piezoelectric ceramic high frequency wave trap vibrator |
| CN1728549A (en) * | 2005-06-27 | 2006-02-01 | 严盛喜 | Chip type resonator of high frequency piezoelectric ceramic in small size |
| CN105704907A (en) * | 2016-02-22 | 2016-06-22 | 汉得利（常州）电子股份有限公司 | Flexible circuit board for reducing impedance of piezoresonator |
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Application publication date: 20200602 |