Industry-Verified Manufacturing Data (2026)

Photodiode Array

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Photodiode Array 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 Photodiode Array is characterized by the integration of Photodiode Element and Substrate. In industrial production environments, manufacturers listed on CNFX commonly emphasize Silicon (Si) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A linear or two-dimensional arrangement of multiple photodiodes integrated on a single semiconductor substrate for simultaneous detection of light intensity across multiple points.

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Product Specifications

Technical details and manufacturing context for Photodiode Array

Definition
A photodiode array is a key component within a Position-Sensitive Detector (PSD) system. It consists of multiple discrete photodiode elements arranged in a precise pattern (typically linear or matrix). In a PSD, the array captures incident light, and by analyzing the signal distribution across the individual diodes, the system can determine the position, movement, or profile of a light spot or image falling on its surface with high spatial resolution.
Working Principle
Each photodiode in the array operates on the principle of the photoelectric effect in a semiconductor p-n junction. When photons strike the active area of a diode, they generate electron-hole pairs if their energy exceeds the semiconductor's bandgap. This creates a photocurrent proportional to the light intensity at that specific location. The array's readout circuitry (often multiplexed) sequentially or simultaneously measures the current from each diode, creating a spatial map of light intensity. In a PSD application, algorithms then process this intensity map to calculate the centroid or shape of the light distribution, translating it into precise positional data.
Common Materials
Silicon (Si), Germanium (Ge), Indium Gallium Arsenide (InGaAs)
Technical Parameters
  • Pixel pitch or center-to-center spacing between adjacent photodiodes in the array, critical for determining the spatial resolution of the PSD. (mm) Customizable
Components / BOM
  • Photodiode Element
    The fundamental light-sensing unit; a semiconductor p-n junction that converts photons into electrical current.
    Material: Silicon, Germanium, or III-V compound semiconductor
  • Substrate
    The base semiconductor wafer (e.g., silicon) on which the photodiode elements and associated circuitry are fabricated.
    Material: Silicon, Sapphire (for specialized applications)
  • Passivation Layer
    A protective dielectric layer (e.g., silicon dioxide, silicon nitride) deposited over the semiconductor surface to stabilize electrical properties and prevent contamination.
    Material: Silicon Dioxide (SiO₂), Silicon Nitride (Si₃N₄)
  • Metallization / Bonding Pads
    Conductive traces and contact pads (typically aluminum or gold) that provide electrical interconnection between the photodiode elements and the external readout circuitry.
    Material: Aluminum, Gold
Engineering Reasoning
0.1-1000 μW/cm² irradiance, 350-1100 nm wavelength, -40°C to +85°C ambient temperature
Permanent damage occurs at >5 mW continuous optical power per diode element, >100 V reverse bias voltage, or >150°C junction temperature
Design Rationale: Thermal runaway from excessive photon flux causing lattice defect propagation, avalanche breakdown from reverse bias exceeding semiconductor bandgap energy (1.12 eV for silicon), or dopant diffusion at elevated temperatures
Risk Mitigation (FMEA)
Trigger Electrostatic discharge (ESD) exceeding 500 V HBM (Human Body Model) during handling
Mode: Gate oxide breakdown in integrated readout circuitry, creating permanent short circuits between adjacent photodiode elements
Strategy: On-chip ESD protection diodes with 0.5 μm snapback spacing and antistatic packaging with surface resistivity <10^9 Ω/sq
Trigger Sustained exposure to >10^12 photons/cm²·s at peak spectral response (typically 900 nm for silicon)
Mode: Saturation-induced blooming where charge spills into neighboring pixels, causing spatial resolution loss and fixed-pattern noise
Strategy: Integrated charge-drain structures with 10^15 cm⁻³ doping concentration and optical neutral density filters with OD 1.0 attenuation

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Photodiode Array.

silicon photodiode array detector InGaAs photodiode array spectroscopy linear photodiode array optical sensors multi-element photodiode array manufacturing photodiode array substrate passivation layer

Applied To / Applications

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

Position-Sensitive Detector
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Flat Panel Detector
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Camera Sensor (CMOS/CCD)
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Read Head
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Light Source/Detector (for optical encoders)
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Light Source & Sensor (Optical Type)
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Light Source/Detector
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Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1 atm (standard packaging), vacuum compatible with special packaging
other spec: Wavelength range: 200-1100 nm (typical), Dark current: 0.1-100 nA, Response time: 1-100 ns
temperature: -40°C to +85°C (operational), -55°C to +125°C (storage)
Media Compatibility
✓ Visible light spectroscopy ✓ Laser beam profiling ✓ Optical character recognition systems
Unsuitable: High-energy radiation environments (X-ray, gamma ray)
Sizing Data Required
  • Required spectral response range (nm)
  • Number of pixels/elements needed
  • Required data acquisition rate (frames/sec)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Signal degradation
Cause: Photodiode dark current increase due to thermal aging or contamination ingress compromising optical surfaces
Array element failure
Cause: Electrostatic discharge (ESD) damage during handling or thermal cycling fatigue in solder joints
Maintenance Indicators
  • Increased noise or baseline drift in spectral data output
  • Visible condensation, particulate accumulation, or discoloration on optical window surfaces
Engineering Tips
  • Implement strict ESD protocols during installation/handling and maintain cleanroom conditions when possible
  • Ensure stable thermal environment with proper heat sinking and avoid rapid temperature cycling during operation

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems IEC 60747-5-2 - Semiconductor devices - Discrete devices - Photodiodes CE marking - EU compliance for electromagnetic compatibility and safety
Manufacturing Precision
  • Spectral response uniformity: +/-5% across array
  • Dark current: <1nA per pixel at 25°C
Quality Inspection
  • Quantum efficiency measurement across wavelengths
  • Pixel-to-pixel crosstalk analysis

Factories Producing Photodiode Array

Verified manufacturers with capability to produce this product in China

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✓ 93% Supplier Capability Match Found

S Sourcing Manager from Germany Jan 12, 2026
★★★★★
"The Photodiode Array we sourced perfectly fits our Computer, Electronic and Optical Product Manufacturing production line requirements."
Technical Specifications Verified
P Procurement Specialist from Brazil Jan 09, 2026
★★★★☆
"Found 38+ suppliers for Photodiode Array on CNFX, but this spec remains the most cost-effective. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Canada Jan 06, 2026
★★★★★
"The technical documentation for this Photodiode Array 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.”

16 sourcing managers are analyzing this specification now. Last inquiry for Photodiode Array from Mexico (1h ago).

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Frequently Asked Questions

What are the main applications of photodiode arrays in computer and optical product manufacturing?

Photodiode arrays are essential for spectral analysis, imaging systems, optical character recognition, barcode scanning, and light measurement in various electronic and optical devices.

How does the choice of material (Si, Ge, or InGaAs) affect photodiode array performance?

Silicon arrays work best for visible light, Germanium for near-infrared, and InGaAs for extended infrared ranges. Material selection determines spectral response, sensitivity, and operating temperature range.

What factors should be considered when integrating photodiode arrays into electronic systems?

Key considerations include array geometry (linear vs. 2D), pixel pitch and uniformity, dark current, response time, spectral range matching, and proper interface with readout electronics through bonding pads.

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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