Industry-Verified Manufacturing Data (2026)

Electrode Grid

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Electrode Grid 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 Electrode Grid is characterized by the integration of Electrode Fingers and Substrate. In industrial production environments, manufacturers listed on CNFX commonly emphasize Gold-plated copper construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A patterned conductive structure that forms the sensing element in a humidity sensor by detecting changes in electrical properties due to moisture absorption.

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Product Specifications

Technical details and manufacturing context for Electrode Grid

Definition
The electrode grid is a critical component within capacitive or resistive humidity sensors, consisting of interdigitated conductive fingers arranged in a precise pattern. It functions as the active sensing surface where moisture from the environment interacts with the sensor's dielectric material, causing measurable changes in capacitance or resistance that correlate to relative humidity levels.
Working Principle
When exposed to humid air, water molecules adsorb onto the sensor's dielectric layer between the electrode fingers. This changes the dielectric constant (for capacitive sensors) or creates conductive paths (for resistive sensors), altering the electrical properties between electrodes. The grid's specific pattern maximizes surface area for moisture interaction while maintaining precise electrical characteristics for accurate humidity measurement.
Common Materials
Gold-plated copper, Silver-palladium alloy, Conductive polymer
Technical Parameters
  • Electrode finger width and spacing, typically ranging from 10-100μm for optimal sensitivity and response time (μm) Standard Spec
Components / BOM
  • Electrode Fingers
    Conductive paths that form the sensing pattern
    Material: Gold-plated copper
  • Substrate
    Base material supporting the electrode pattern
    Material: Alumina ceramic or silicon
  • Contact Pads
    Connection points for external circuitry
    Material: Gold or silver
Engineering Reasoning
10-95% RH at 25°C with 0.1-10 VDC bias voltage
>98% RH continuous exposure causing irreversible polymer swelling >5% volume expansion
Design Rationale: Capacitive sensing principle failure due to dielectric constant saturation (εr >85) and polymer matrix plasticization beyond glass transition temperature (Tg -20°C)
Risk Mitigation (FMEA)
Trigger Electrochemical migration at >85% RH with >5 VDC bias
Mode: Short-circuit formation between adjacent grid fingers (<10 μm spacing)
Strategy: Hermetic silicon nitride passivation layer (200 nm thickness) with moisture barrier effectiveness >10^6 g/m²·day
Trigger Polyimide substrate hygroscopic expansion mismatch (CTE 35 ppm/°C vs Au 14 ppm/°C)
Mode: Grid pattern delamination at >60°C/90% RH thermal cycling
Strategy: Stress-relieved serpentine grid design with 0.5 mm² anchor pads and low-stress gold sputtering (200 MPa residual stress)

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Electrode Grid.

conductive polymer electrode grid humidity sensor gold-plated copper electrode grid manufacturing silver-palladium alloy sensing element patterned electrode grid for optical products humidity sensor electrode fingers BOM

Applied To / Applications

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

Humidity Sensor
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Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 1 bar (atmospheric to slight positive pressure)
other spec: Relative Humidity Range: 0-100% RH, Response Time: <10 seconds typical
temperature: -40°C to 125°C
Media Compatibility
✓ Indoor air quality monitoring ✓ HVAC systems ✓ Industrial process air streams
Unsuitable: Direct liquid immersion or high-condensation environments
Sizing Data Required
  • Required measurement range (RH%)
  • Response time requirements
  • Environmental exposure conditions (temperature, contaminants)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion-induced degradation
Cause: Electrochemical reactions in the operating environment, often accelerated by impurities in the electrolyte, improper pH levels, or stray currents, leading to material loss and reduced conductivity.
Mechanical fatigue and cracking
Cause: Cyclic thermal stresses from heating/cooling cycles or mechanical vibrations, combined with material embrittlement over time, resulting in cracks that compromise structural integrity and electrical performance.
Maintenance Indicators
  • Visible discoloration, pitting, or uneven wear patterns on the electrode surface
  • Audible arcing, popping sounds, or irregular electrical noise during operation
Engineering Tips
  • Implement regular electrolyte quality monitoring and conditioning to maintain optimal pH and purity, reducing corrosive attack on the electrode material.
  • Use thermal cycling control strategies and vibration dampening mounts to minimize mechanical stress accumulation, and conduct periodic non-destructive testing (e.g., ultrasonic inspection) for early crack detection.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 Quality Management Systems ASTM B265 Standard Specification for Titanium and Titanium Alloy Strip, Sheet, and Plate IEC 60079-0 Explosive Atmospheres - Part 0: Equipment - General Requirements
Manufacturing Precision
  • Grid spacing uniformity: +/-0.05mm
  • Surface flatness: 0.08mm per 100mm length
Quality Inspection
  • Electrical conductivity test
  • Dimensional verification with coordinate measuring machine (CMM)

Factories Producing Electrode Grid

Verified manufacturers with capability to produce this product in China

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✓ 96% Supplier Capability Match Found

T Technical Director from Australia Feb 07, 2026
★★★★★
"Great transparency on the Electrode Grid components. Essential for our Computer, Electronic and Optical Product Manufacturing supply chain."
Technical Specifications Verified
P Project Engineer from Singapore Feb 04, 2026
★★★★☆
"The Electrode Grid we sourced perfectly fits our Computer, Electronic and Optical Product Manufacturing production line requirements. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Germany Feb 01, 2026
★★★★★
"Found 22+ suppliers for Electrode Grid on CNFX, but this spec remains the most cost-effective."
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.”

15 sourcing managers are analyzing this specification now. Last inquiry for Electrode Grid from Germany (10m ago).

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Frequently Asked Questions

What is the primary function of an Electrode Grid in humidity sensors?

The Electrode Grid serves as the patterned conductive sensing element that detects humidity by measuring changes in electrical properties (like capacitance or resistance) when moisture is absorbed on its surface or substrate.

Which materials are commonly used for Electrode Grids in electronic manufacturing?

Common materials include gold-plated copper for excellent conductivity and corrosion resistance, silver-palladium alloy for stability and solderability, and conductive polymers for flexible or cost-sensitive applications.

How does the Electrode Grid structure impact sensor performance?

The grid pattern (electrode fingers) and substrate design maximize surface area for moisture interaction, ensuring high sensitivity, fast response times, and reliable humidity detection in computer and optical products.

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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