A piezoelectric ceramic filter
A technology of piezoelectric ceramics and filters, applied in the direction of electrical components, impedance networks, etc., can solve problems affecting the qualified rate of finished products, poor frequency concentration of piezoelectric ceramic vibrators, etc., reduce bad waveforms and frequency dispersion, and simplify the production process. The effect of high yield
Inactive Publication Date: 2015-12-09
HUNAN JIAYEDA ELECTRONICS
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Problems solved by technology
[0003] In order to overcome the above-mentioned defects of the prior art, the purpose of the present invention is to provide a piezoelectric ceramic 10.7MHZ filter to solve the problem that the frequency of the piezoelectric ceramic vibrator is poorly concentrated and directly affects the qualified rate of finished products
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[0016] The present invention will be further described in conjunction with accompanying drawing and example:
[0017] In one embodiment of the present invention, both sides of the ceramic chip 1 of the piezoelectric ceramic 10.7MHZ filter are designed with: a coated metal layer 2, a vibrator electrode and a vibrator pad, and a connecting line between the vibrator electrode and the pad, wherein the ceramic chip is in the form of Rectangular, the coated metal layer is located on the outer layer of the ceramic chip; each side is provided with seven rows and three columns of vibrator electrodes and vibrator pads with the same shape and evenly distributed, except for the first and seventh rows, the front of each column in each row One end of the oscillator pad 3 is connected through a front-side oscillator pad connection line 4, and the other end of the front-side oscillator pad 3 in each column in each row is connected through another front-side oscillator pad connection line 5; th...
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The invention relates to a piezoelectric ceramic filter and belongs to the technical field of electronic elements. A plating metal layer, a vibrator electrode, a vibrator pad, and vibrator pad connecting lines are designed on each of the front and back sides of a ceramic chip of the piezoelectric ceramic filter, wherein the ceramic chip is a rectangle; the plating metal layers cover the outer surface layer of the ceramic chip; a plurality of rows and columns of vibrator electrodes and vibrator pads which are the same in shapes and evenly distributed are arranged on the ceramic chip; each column of vibrator pads except for the first row and the seventh row of vibrator pads are connected through the vibrator pad connecting line; the first row and the seventh row of vibrator pads are not connected with the second row to the sixth row of vibrator pads; and the shapes of the first row of vibrator electrodes and the vibrator pads are opposite to the shapes of other rows of vibrator electrodes and the vibrator pads. By adopting the piezoelectric ceramic filter, the frequency concentration and the test efficiency of the product can be effectively improved; the frequency acceptability of the finished product is also improved; and the difference of the marginal frequency and the middle frequency is reduced by completely reversing the first row of vibrator electrodes and the vibrator pads.
Description
technical field [0001] The invention relates to a filter, in particular to a piezoelectric ceramic 10.7MHZ filter, which belongs to the technical field of electronic components. Background technique [0002] Piezoelectric ceramic filters are composed of piezoelectric ceramic sheets, metal layers, metal electrode shapes, etc., and can be used in tuners, wireless earphones, car audio, radios, walkie-talkies and other fields. Piezoelectric ceramic wave filter itself is an electronic component with strict frequency, which requires high frequency accuracy and consistency. Affected by its own thickness and structure, the higher the frequency, the greater the dispersion of frequency. For customers, the frequency range requirements have become the main factor for piezoelectric ceramic filters. Due to the dispersion of the internal frequency of the ceramic chip during the production of the piezoelectric ceramic filter and the cutting of the ceramic chip into a piezoelectric ceramic ...
Claims
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IPC IPC(8): H03H9/54
Inventor 陈普查刘志潜罗小施刘超慧
Owner HUNAN JIAYEDA ELECTRONICS