Resistive Layer: Spectral Range 300-1100 nm, Thickness 0.1-1 μm

Q: What is the primary function of a resistive layer in a position-sensitive detector?

The resistive layer converts the position of incident light or particles into electrical signals by utilizing resistance variation, enabling precise spatial measurement in applications like laser alignment and particle tracking.

Q: How does material choice affect resistive layer performance?

Material selection (e.g., ITO for transparency, a-Si for sensitivity) impacts key parameters like sheet resistance, response time, spectral range, and durability, influencing accuracy and suitability for specific environments such as high-temperature or corrosive conditions.

Component Specifications

Definition

The resistive layer is a critical component in position-sensitive detectors (PSDs), typically consisting of a uniform thin-film resistive material deposited on a substrate. It functions as a continuous position-to-voltage converter by generating position-dependent voltage outputs when current flows through it and light or particles strike specific locations, enabling precise spatial measurement of incident radiation or particles.

Working Principle

The resistive layer operates on the principle of resistive division. When a bias voltage is applied across the layer, incident light or particles create localized charge carriers at the strike point. The resulting current divides proportionally along the resistive paths to electrodes at the layer's edges, producing output voltages that correspond linearly to the position of the incident event, allowing accurate position determination through signal processing.

Materials

Typically made from thin-film materials such as amorphous silicon (a-Si), indium tin oxide (ITO), or metal oxides (e.g., SnO2) deposited on glass or silicon substrates via sputtering or chemical vapor deposition, with sheet resistances ranging from 1 kΩ/sq to 10 MΩ/sq and thicknesses of 0.1-1 μm.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Thickness	0.1-1 μm
Active Area	Up to 50 mm x 50 mm
Response Time	<1 μs
Spectral Range	300-1100 nm
Linearity Error	<1%
Sheet Resistance	1 kΩ/sq to 10 MΩ/sq

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 10110, DIN 58141

Parent Products

This component is used in the following industrial products

Position-Sensitive Detector

An optoelectronic device that detects the position of a light spot on its active surface and outputs corresponding electrical signals.

View Product Details

Engineering Analysis

Risks & Mitigation

Delamination due to thermal stress
Resistance drift over time
Contamination affecting accuracy
Electrode corrosion

FMEA Triads

Trigger: Thermal cycling or moisture ingress
Failure: Layer delamination or cracking
Mitigation: Use robust adhesion layers and environmental sealing

Trigger: Material degradation or aging
Failure: Resistance drift leading to measurement errors
Mitigation: Implement regular calibration and use stable materials

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5% for linearity, ±2% for resistance

Test Method

ISO 10110 for optical properties, electrical testing with four-point probe and laser scanning

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 Resistive Layer

Manufacturer profiles associated with Resistive Layer.

Sourcing Resistive Layer from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Dielectric Layer

Insulating layer in surface mount capacitors that stores electrical energy through polarization.

Optical Window

Transparent optical component for light transmission in polycarbonate lens housings

PCB Substrate

PCB substrate is the foundational insulating layer that provides mechanical support and electrical connectivity for electronic components in high-speed memory modules.

Edge Connector

Edge connector is a printed circuit board (PCB) connector that mates with the edge of another PCB, commonly used in high-speed memory modules for reliable electrical connections.

Frequently Asked Questions

What is the primary function of a resistive layer in a position-sensitive detector?