Array Substrate: Trace Width/Spacing 50 μm/50 μm

Q: What is the primary function of an array substrate in a detector array?

The array substrate provides mechanical support, precise alignment, electrical interconnection, and thermal management for the individual detector elements in the array.

Q: What materials are commonly used for array substrates?

Common materials include alumina ceramic for high stability and thermal performance, aluminum nitride for superior thermal conductivity, and specialized PCB materials like FR-4 or polyimide for flexible or cost-sensitive applications.

Component Specifications

Definition

An array substrate is a specialized printed circuit board (PCB) or ceramic substrate designed to provide mechanical support, electrical connectivity, and thermal management for multiple detector elements arranged in an array configuration. It serves as the structural and functional backbone of detector arrays, ensuring precise alignment, signal routing, and integration with readout electronics.

Working Principle

The array substrate operates by providing a stable platform where individual detector elements (such as photodiodes, sensors, or pixels) are mounted. It contains conductive traces that route electrical signals from each detector to external connectors or integrated circuits. The substrate may incorporate impedance-matched transmission lines, ground planes, and shielding to maintain signal integrity. Thermal management features (like thermal vias or heat spreaders) help dissipate heat generated by detectors or electronics.

Materials

High-purity alumina (Al2O3) ceramic, aluminum nitride (AlN) for high thermal conductivity, or specialized PCB materials like FR-4, polyimide, or Rogers laminates. Conductive traces are typically copper with gold or nickel plating for corrosion resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Flatness	<10 μm over 100 mm
Surface Roughness	<0.4 μm Ra
Substrate Material	Alumina Ceramic (Al2O3)
Dielectric Constant	9.8
Trace Width/Spacing	50 μm/50 μm
Thermal Conductivity	24-30 W/mK
Operating Temperature	-40°C to +125°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

IPC-6012, MIL-PRF-31032

Parent Products

This component is used in the following industrial products

Detector Array

A multi-element sensing component that detects fish bones in food products through coordinated signal acquisition

View Product Details

Engineering Analysis

Risks & Mitigation

Delamination of layers
Thermal stress cracking
Signal crosstalk between traces
Poor solder joint reliability

FMEA Triads

Trigger: Thermal cycling during operation
Failure: Cracking of ceramic substrate or trace delamination
Mitigation: Use materials with matched coefficients of thermal expansion (CTE), implement thermal vias, and design for stress relief.

Trigger: Manufacturing defects in trace patterning
Failure: Short circuits or open circuits in signal paths
Mitigation: Implement automated optical inspection (AOI), strict process controls, and electrical testing of each substrate.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.05 mm for critical dimensions, ±5% for electrical properties

Test Method

Electrical continuity testing, thermal cycling (IEC 60068-2-14), impedance measurement (IPC-TM-650)

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

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Inspection readiness

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Supplier transparency

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Manufacturers of Array Substrate

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Frequently Asked Questions

What is the primary function of an array substrate in a detector array?