INDUSTRY COMPONENT

Planarization Layer

A planarization layer is a thin film coating applied during micro-lens array manufacturing to create a smooth, flat surface for subsequent optical layers.

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Component Specifications

Definition
In micro-lens array fabrication, the planarization layer is a critical intermediate component deposited between lens elements or substrate layers to eliminate surface topography, reduce scattering losses, and ensure uniform optical performance across the array. This layer typically consists of polymer or dielectric materials with precise thickness control (50-500 nm) and optical properties matching the lens system requirements.
Working Principle
The planarization layer operates by filling surface irregularities through spin-coating or chemical vapor deposition, then curing to form a smooth optical interface. Its refractive index and thickness are engineered to minimize Fresnel reflections while maintaining mechanical stability during subsequent lithography and etching processes.
Materials
Polyimide, SU-8 photoresist, SiO₂, Si₃N₄, or specialized optical polymers with refractive indices between 1.45-1.65, thermal stability >200°C, and UV/visible light transparency >90%.
Technical Parameters
  • Thickness 100-300 nm
  • Refractive Index 1.46-1.62
  • Adhesion Strength >20 MPa
  • Surface Roughness <2 nm RMS
  • Thermal Expansion <20 ppm/°C
Standards
ISO 10110-7, ISO 14999-4, DIN 58141-2

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Planarization Layer.

optical planarization micro-lens fabrication surface smoothing layer thin film coating optical array manufacturing Planarization Layer Planarization Layer in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Micro-lens Array

An array of microscopic lenses integrated onto the surface of an image sensor pixel array to focus incident light onto the photosensitive area of each pixel.

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Engineering Analysis

Risks & Mitigation
  • Delamination under thermal cycling
  • Optical inhomogeneity from uneven curing
  • Contamination during deposition
FMEA Triads
Trigger: Inadequate surface preparation
Failure: Poor adhesion and layer delamination
Mitigation: Implement plasma cleaning and adhesion promoters
Trigger: Non-uniform curing
Failure: Variable refractive index across surface
Mitigation: Use controlled thermal ramping and in-situ monitoring

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Thickness ±5%, refractive index ±0.005, surface roughness <2 nm
Test Method
Ellipsometry for thickness/refractive index, AFM for surface roughness, spectrophotometry for optical transmission

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

Why is planarization critical for micro-lens arrays?

Planarization eliminates surface irregularities that cause light scattering, ensuring uniform focal lengths and optical efficiency across thousands of micro-lenses.

What materials work best for planarization layers?

Low-stress silicon dioxide and specialized optical polymers provide optimal smoothness, thermal stability, and refractive index matching for most applications.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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Pixel Shader Plated Through Holes