LED chip/die: Chip Size 0.1-1.0 mm², Forward Voltage 2.0-3.8V

Component Specifications

Definition

An LED chip/die is a miniature semiconductor device fabricated on a substrate (typically sapphire, silicon carbide, or gallium arsenide) using epitaxial growth techniques. It consists of multiple semiconductor layers forming p-n junctions that emit photons when forward-biased. The chip includes active regions, electrodes, and sometimes phosphor coatings for wavelength conversion. As the fundamental light-emitting element in LED packages, it determines spectral characteristics, efficiency, and thermal performance.

Working Principle

Electroluminescence in semiconductor materials: When forward voltage is applied across the p-n junction, electrons and holes recombine in the active region, releasing energy as photons. The wavelength (color) is determined by the bandgap energy of the semiconductor materials (e.g., InGaN for blue/green, AlInGaP for red/yellow).

Materials

Substrate: Sapphire (Al2O3), Silicon Carbide (SiC), or Gallium Arsenide (GaAs). Epitaxial layers: Gallium Nitride (GaN), Indium Gallium Nitride (InGaN), Aluminum Gallium Indium Phosphide (AlGaInP). Electrodes: Gold (Au), Aluminum (Al), or Copper (Cu). Encapsulation: Silicone or epoxy resins.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Chip Size	0.1-1.0 mm²
Luminous Flux	50-200 lm/W
Forward Voltage	2.0-3.8V
Thermal Resistance	5-15 K/W
Dominant Wavelength	380-780 nm
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

ISO 23550, IEC 62031, JEDEC JESD51, DIN EN 62031

Parent Products

This component is used in the following industrial products

LED Array

A structured arrangement of multiple LED chips mounted on a substrate to form a lighting module.

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Engineering Analysis

Risks & Mitigation

Electrostatic discharge (ESD) damage
Thermal degradation from junction overheating
Gold wire bond failure
Phosphor thermal quenching
Moisture-induced corrosion

FMEA Triads

Trigger: Excessive forward current
Failure: Junction temperature exceeds maximum rating, causing permanent efficiency drop (lumen depreciation)
Mitigation: Implement constant current drivers with thermal foldback protection and proper heat sinking

Trigger: ESD during handling
Failure: Catastrophic failure or latent damage reducing lifespan
Mitigation: Use ESD-protected workstations, grounded tools, and antistatic packaging

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±5% forward voltage, ±3nm dominant wavelength, ±10% luminous flux binning

Test Method

Integrating sphere photometry (LM-79), thermal resistance measurement (JESD51), accelerated life testing (LM-80)

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

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Manufacturers of LED chip/die

Manufacturer profiles associated with LED chip/die.

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Frequently Asked Questions

What is the difference between LED chip and LED die?

The terms are often used interchangeably, but technically 'die' refers to the individual semiconductor piece after dicing from a wafer, while 'chip' may refer to the packaged component. In industrial contexts, both describe the bare light-emitting semiconductor element.

How does chip size affect LED performance?

Larger chips generally produce higher luminous flux but may have lower current density efficiency and higher thermal resistance. Smaller chips offer better current spreading and thermal management but require more precise handling during assembly.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

LED chip/die