INDUSTRY COMPONENT

Piezoelectric Substrate

Piezoelectric substrate is a specialized material used in surface acoustic wave (SAW) filters to convert electrical signals into mechanical vibrations and vice versa.

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
ParameterTypical rangeNotes & selection driver
Size1.0 mm x 1.0 mm to 5.0 mm x 5.0 mm
Thickness0.2 mm to 0.5 mm
Insertion Loss< 3 dB
Frequency Range10 MHz to 3 GHz
Temperature Coefficient-30 to -50 ppm/°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

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

Parent Products

This component is used in the following industrial products

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

Typical Suppliers & Equivalents

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

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Piezoelectric Substrate

Manufacturer profiles associated with Piezoelectric Substrate.

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Frequently Asked Questions

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.

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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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