Industry-Verified Manufacturing Data (2026)

Interdigital Transducer (IDT)

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Interdigital Transducer (IDT) used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Interdigital Transducer (IDT) is characterized by the integration of Interdigitated Electrodes and Bus Bars. In industrial production environments, manufacturers listed on CNFX commonly emphasize Aluminum construction to support stable, high-cycle operation across diverse manufacturing scenarios.

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

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Product Specifications

Technical details and manufacturing context for Interdigital Transducer (IDT)

Definition
A key component in surface acoustic wave (SAW) resonator arrays that generates and detects acoustic waves on piezoelectric substrates. It consists of interdigitated metal electrodes patterned on the substrate surface, enabling efficient electromechanical conversion for signal processing applications.
Working Principle
When an alternating electrical signal is applied to the interdigitated electrodes, it creates a periodic electric field that induces mechanical strain in the piezoelectric substrate via the inverse piezoelectric effect, generating surface acoustic waves. Conversely, incoming acoustic waves create electrical signals through the direct piezoelectric effect.
Common Materials
Aluminum, Gold, Lithium Niobate (LiNbO₃), Quartz
Technical Parameters
  • Electrode finger width and spacing, determining the operating frequency (μm) Customizable
Components / BOM
  • Interdigitated Electrodes
    Create periodic electric field for acoustic wave generation/detection
    Material: Aluminum or Gold
  • Bus Bars
    Connect electrode fingers to external electrical contacts
    Material: Aluminum or Gold
  • Piezoelectric Substrate
    Provides medium for acoustic wave propagation and electromechanical conversion
    Material: Lithium Niobate or Quartz
Engineering Reasoning
10-1000 MHz frequency range, 1-50 Vpp input voltage, -40°C to +85°C temperature range
Electrode delamination at 150°C substrate temperature, piezoelectric substrate fracture at 1.5 GPa mechanical stress, electrode electromigration at 2×10⁶ A/cm² current density
Design Rationale: Thermal expansion coefficient mismatch (Al electrode: 23×10⁻⁶/K vs. LiNbO₃ substrate: 15×10⁻⁶/K) causes interfacial stress; acoustic wave reflection at electrode edges creates standing wave stress concentrations; electron wind force exceeds atomic binding energy at high current densities
Risk Mitigation (FMEA)
Trigger Electrode corrosion from chloride ion contamination at 50 ppm concentration
Mode: Increased insertion loss exceeding 3 dB specification, frequency response distortion >5%
Strategy: Hermetic sealing with Au/Ni under-bump metallization, moisture-resistant polyimide passivation layer
Trigger Substrate microcrack propagation from 100 MPa cyclic thermal stress during 10⁶ power cycles
Mode: Acoustic wave scattering causing 15% velocity variation, spurious resonance modes at ±2% frequency offset
Strategy: Stress-relief electrode design with tapered finger ends, substrate polishing to <5 nm RMS surface roughness

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Interdigital Transducer (IDT).

high frequency IDT for SAW filters lithium niobate interdigital transducer aluminum electrode IDT manufacturing quartz substrate SAW transducer custom interdigitated electrode design

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Resonator Array
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Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 10 bar (depends on packaging)
temperature: -40°C to +125°C (typical), up to +300°C with specialized materials
power handling: Up to 1 W (typical), limited by electrode heating
frequency range: 10 MHz to 3 GHz
Media Compatibility
✓ Piezoelectric substrates (LiNbO3, quartz, GaAs) ✓ Clean gases (air, nitrogen) ✓ Non-corrosive liquids (deionized water, oils)
Unsuitable: Abrasive slurries or corrosive chemical environments
Sizing Data Required
  • Operating frequency (MHz/GHz)
  • Bandwidth requirements (%)
  • Substrate material and thickness

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Electrode Degradation
Cause: Electrochemical corrosion or electromigration due to high-frequency electrical currents, moisture ingress, or material incompatibility leading to increased electrical resistance and signal loss.
Acoustic Mismatch/Decoupling
Cause: Delamination or degradation of the piezoelectric substrate or bonding layer from thermal cycling, mechanical stress, or adhesive failure, resulting in reduced acoustic wave transmission efficiency.
Maintenance Indicators
  • Significant drop in signal amplitude or increased insertion loss during operation, indicating potential electrode damage or substrate issues.
  • Audible buzzing or crackling noises from the transducer during excitation, suggesting arcing, loose connections, or internal fractures.
Engineering Tips
  • Implement strict environmental controls (e.g., hermetic sealing, desiccants) to prevent moisture ingress and corrosion, and use compatible, high-purity electrode materials to minimize electromigration.
  • Apply controlled thermal management during operation and installation to reduce thermal stress, and use precision alignment fixtures to avoid mechanical strain on the piezoelectric substrate.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 Quality Management Systems ANSI/IEEE 176-1987 Standard on Piezoelectricity DIN EN 50178 Electronic equipment for use in power installations
Manufacturing Precision
  • Electrode width: +/-0.5 μm
  • Center frequency: +/-0.1%
Quality Inspection
  • Surface Acoustic Wave (SAW) performance test
  • Microscopic dimensional verification

Factories Producing Interdigital Transducer (IDT)

Verified manufacturers with capability to produce this product in China

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✓ 98% Supplier Capability Match Found

P Project Engineer from Singapore Jan 09, 2026
★★★★★
"The Interdigital Transducer (IDT) we sourced perfectly fits our Computer, Electronic and Optical Product Manufacturing production line requirements."
Technical Specifications Verified
S Sourcing Manager from Germany Jan 06, 2026
★★★★★
"Found 41+ suppliers for Interdigital Transducer (IDT) on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
P Procurement Specialist from Brazil Jan 03, 2026
★★★★★
"The technical documentation for this Interdigital Transducer (IDT) is very thorough, especially regarding technical reliability."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

17 sourcing managers are analyzing this specification now. Last inquiry for Interdigital Transducer (IDT) from USA (1h ago).

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Frequently Asked Questions

What are the primary applications of Interdigital Transducers in electronics manufacturing?

IDTs are essential components in surface acoustic wave (SAW) devices including filters, resonators, delay lines, and sensors used in telecommunications, RF systems, and signal processing applications.

How does the choice of piezoelectric substrate material affect IDT performance?

Substrate materials like Lithium Niobate (LiNbO₃) offer high electromechanical coupling for broadband applications, while quartz provides excellent temperature stability and low loss for precision frequency control devices.

What factors determine the operating frequency range of an Interdigital Transducer?

The IDT's operating frequency is primarily determined by the electrode finger spacing (pitch) and the acoustic velocity of the piezoelectric substrate, with typical ranges from MHz to several GHz depending on design parameters.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Computer, Electronic and Optical Product Manufacturing sector.

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