Editorial Technical Reference

Substrate Holder

This page explains how Substrate Holder is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A precision fixture that securely holds optical lens substrates during the coating process in a vacuum chamber.

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Substrate Holder in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Substrate Holder

Definition
The substrate holder is a critical component within the Precision Optical Lens Coating Chamber designed to securely position and maintain optical lens substrates during thin-film deposition processes. It ensures precise alignment, stable mounting, and uniform thermal management of substrates to achieve consistent coating thickness and quality across the lens surface. The holder typically interfaces with the chamber's rotation mechanism and heating systems to optimize coating uniformity. Constructed from materials such as stainless steel, aluminum alloy, or ceramic, the holder is engineered to withstand vacuum conditions and temperature variations. It accommodates substrates with diameters ranging from 25.4 to 152.4 mm and thicknesses from 0.5 to 10 mm, with adjustable holding force between 5 and 50 N to prevent deformation. Positioning accuracy is maintained within ±0.05 mm, and repeatability within ±0.02 mm, ensuring consistent placement across batches. The operating temperature range is -20 to 200 °C, and the operating pressure range is 1.0 to 1.6 MPa, referencing. The material grade SUS304 (per ASTM A240) is specified for corrosion resistance, and surface roughness is maintained at Ra 0.8 μm to prevent contamination and scratching. The weight varies from 0.5 to 2.5 kg depending on size and configuration. These parameters serve as reference ranges; actual values must be confirmed with the manufacturer for specific applications. The holder's design minimizes vibration and maintains positional accuracy under vacuum, contributing to uniform coating deposition. It may include integrated heating or cooling elements for thermal stability and electrical grounding if required. As a component, it is essential for achieving high-quality optical coatings in precision lens manufacturing.
Working Principle
The substrate holder operates by mechanically clamping or securing optical lens substrates using precision fixtures. During coating operations, it may rotate to ensure even deposition of coating materials, maintain thermal stability through integrated heating/cooling elements, and provide electrical grounding if required. Its design minimizes vibration and maintains positional accuracy under vacuum conditions. The holding force is adjustable to prevent deformation, and the holder interfaces with the chamber's rotation and heating systems to optimize coating uniformity. The materials and surface finish are selected to avoid contamination and scratching, ensuring consistent coating quality across batches.
Common Materials
Stainless Steel, Aluminum Alloy, Ceramic
Technical Parameters
ParameterTypical rangeNotes & selection driver
Substrate Diameter25.4–152.4 mmStandard sizes for optical lenses
Substrate Thickness0.5–10 mmAccommodates common lens substrates
Holding Force5–50 NAdjustable to prevent deformation
Positioning Accuracy±0.05 mmEnsures coating uniformity
Repeatability±0.02 mmConsistent placement across batches
Operating Temperature-20–200 °CCompatible with vacuum coating processes
MaterialSUS304Corrosion-resistant stainless steelASTM A240
Surface RoughnessRa 0.8 μmPrevents contamination and scratching
Weight0.5–2.5 kgDepends on size and configuration

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Clamping Mechanism
    Secures the optical lens substrate in place without causing damage or distortion
    Material: Stainless Steel
  • Rotation Interface
    Connects to the chamber's drive system to enable substrate rotation during coating
    Material: Aluminum Alloy
  • Thermal Plate Part
    Provides controlled heating or cooling to maintain substrate temperature during deposition
    Material: Copper or Aluminum
  • Mounting Base Part
    Structural foundation that attaches the holder to the chamber's internal framework
    Material: Stainless Steel

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: High vacuum to 10^-6 Torr
other spec: Max substrate weight: 5 kg, Vibration tolerance: < 0.1 μm RMS
temperature: -50°C to 300°C
Media Compatibility
✓ Optical glass substrates ✓ Silicon wafers ✓ Ceramic lens blanks
Unsuitable: Corrosive chemical vapor deposition (CVD) environments with halogens
Sizing Data Required
  • Substrate diameter and thickness
  • Vacuum chamber dimensions and port size
  • Required coating uniformity specification

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Seal degradation and leakage
Cause: Chemical attack from process fluids, thermal cycling causing elastomer hardening/cracking, or improper installation leading to seal extrusion
Bearing failure and alignment issues
Cause: Contamination ingress (particles, moisture), inadequate lubrication, misalignment during installation, or excessive vibration from unbalanced loads
Maintenance Indicators
  • Visible fluid leakage around seals or joints indicating seal failure
  • Abnormal vibration or audible grinding/rumbling noises during operation suggesting bearing wear or misalignment
Engineering Tips
  • Implement regular seal inspection and replacement schedule based on chemical compatibility charts and thermal history, using proper installation techniques
  • Establish precision alignment procedures during installation/maintenance, maintain clean lubrication systems, and install vibration monitoring for early bearing wear detection

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ASTM E112 - Standard Test Methods for Determining Average Grain Size CE Marking - EU Machinery Directive 2006/42/EC

Quoted from the published standard.

Manufacturing Precision
  • Flatness: ≤0.05mm per 100mm
  • Parallelism: ±0.02mm between mounting surfaces
Quality Inspection
  • Coordinate Measuring Machine (CMM) Verification
  • Surface Roughness Testing (Ra ≤ 0.8μm)
Technical documentation
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Manufacturing capability
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Inspection readiness
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Manufacturers of Substrate Holder

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Frequently Asked Questions

What is the substrate holder used for?

It securely holds optical lens substrates during thin-film deposition in a vacuum chamber, ensuring precise alignment and stable mounting for uniform coating.

What materials are available?

The holder is available in stainless steel, aluminum alloy, or ceramic, as listed in the directory. Material grade SUS304 is specified for stainless steel, but confirm with the manufacturer.

What are the key specifications?

It accommodates substrate diameters of 25.4–152.4 mm, thicknesses of 0.5–10 mm, holding force of 5–50 N, positioning accuracy ±0.05 mm, repeatability ±0.02 mm, operating temperature -20 to 200 °C, and pressure 1.0–1.6 MPa. Verify with the manufacturer.

How do I verify compatibility?

Check the substrate dimensions, required holding force, and operating conditions against the listed ranges. Always confirm model-specific values and standards with the legal manufacturer or supplier.

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

Related equipment

Industrial Ecosystem & Supply Chain Structure

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

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