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Piezoelectric Substrate Component – Computer, Electronic and Optical Product Manufacturing

Q: What is the main function of a piezoelectric substrate in a SAW filter?

It converts electrical signals into mechanical surface acoustic waves and back, enabling precise frequency filtering in electronic circuits.

Q: Which materials are commonly used for piezoelectric substrates?

Lithium niobate and lithium tantalate are most common due to their high electromechanical coupling coefficients and temperature stability.

Component Specifications

Definition

A piezoelectric substrate is a crystalline material that exhibits the piezoelectric effect, generating an electrical charge in response to applied mechanical stress and vice versa. In bandpass/SAW filters, it serves as the foundation where interdigital transducers (IDTs) are patterned to create surface acoustic waves that filter specific frequency bands in electronic circuits.

Working Principle

The piezoelectric substrate operates on the piezoelectric effect. When an alternating electrical signal is applied to interdigital transducers deposited on its surface, it generates mechanical surface acoustic waves that propagate along the substrate. These waves interact with the IDT pattern to filter specific frequencies, converting them back to electrical signals at the output.

Materials

Lithium niobate (LiNbO3), lithium tantalate (LiTaO3), quartz (SiO2), or other piezoelectric crystals with specific crystal orientations (e.g., 128° Y-cut LiNbO3).

Technical Parameters

Size 1.0 mm x 1.0 mm to 5.0 mm x 5.0 mm
Thickness 0.2 mm to 0.5 mm
Insertion Loss < 3 dB
Frequency Range 10 MHz to 3 GHz
Temperature Coefficient -30 to -50 ppm/°C

Standards

ISO 18563-1, DIN EN 61340-5-1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Piezoelectric Substrate.

Parent Products

This component is used in the following industrial products

Filter (Bandpass/SAW)

An electronic component that selectively passes signals within a specific frequency range while attenuating others, used in receiver circuits.

View Product Details

Interdigital Transducer (IDT)

A transducer that converts electrical signals to surface acoustic waves (SAWs) and vice versa through interleaved metal electrodes.

View Product Details

Engineering Analysis

Risks & Mitigation

Mechanical cracking due to thermal stress
Degradation of piezoelectric properties over time
Contamination during manufacturing

FMEA Triads

Trigger: Improper handling during assembly
Failure: Substrate cracking leading to filter malfunction
Mitigation: Implement automated handling systems and strict ESD controls

Trigger: Excessive thermal cycling
Failure: Reduced piezoelectric efficiency and frequency drift
Mitigation: Use temperature-compensated designs and proper heat dissipation

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±0.5% frequency tolerance, ±0.1 mm dimensional tolerance

Test Method

Network analyzer measurement, temperature cycling tests, vibration testing per MIL-STD-883

Buyer Feedback

★★★★☆ 4.8 / 5.0 (15 reviews)

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this Piezoelectric Substrate meets all ISO standards."

"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The Piezoelectric Substrate arrived with full certification."