Integrated patch type piezoelectric ceramic structure and circuit board with ceramic

Abstract

The invention relates to an integrated patch type piezoelectric ceramic structure and a circuit board with the same, and relates to the field of piezoelectric ceramics, the integrated patch type piezoelectric ceramic structure comprises a piezoelectric ceramic body, the piezoelectric ceramic body is provided with a concave part, the section of the concave part cut by a plane parallel to the piezoelectric ceramic body is circular, and the piezoelectric ceramic body is provided with a plurality of through holes. The diameter of the concave part is gradually increased in the direction from the concave part to the piezoelectric ceramic body, and the concave part is made of piezoelectric ceramic. The sound pressure of the ultrasonic waves generated by the concave part is high, the frequency is stable, sound production by means of a paper cone is not needed, the cost is saved, vibration is not needed to be transmitted to the paper cone for vibration sound production, the energy loss is reduced, the quality of the ultrasonic waves is improved, and compared with the paper cone, the sound production efficiency is improved. And the sunken part is not easy to influence the ultrasonic quality due to the permeation of water.

Description

technical field [0001] The present application relates to the field of piezoelectric ceramics, and in particular, to an integrated chip piezoelectric ceramic structure and a circuit board with the ceramics. Background technique [0002] Ultrasonic sensors are sensors that convert ultrasonic signals into other energy signals (usually electrical signals). Ultrasound is a mechanical wave whose vibration frequency is higher than 20kHz. It has the characteristics of high frequency, short wavelength, small diffraction phenomenon, especially good directionality, which can become a ray and propagate in a direction. Ultrasound has a great ability to penetrate liquids and solids, especially in solids that are opaque to sunlight. When the ultrasonic wave encounters impurities or interfaces, it will produce significant reflections to form reflected echoes, and when it encounters moving objects, it can produce Doppler effects. Ultrasonic sensors are widely used in industry, national d...

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Problems solved by technology

However, since the paper cone is generally made of cotton, wood pulp, wool or spun silk extracts, the whole is relatively fragile, and an additional net cover is generally required for protection, resulting in higher costs

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