Precision Stage for Wafer Probing Systems

Product Specifications

Technical details and manufacturing context for Precision Stage

Definition

The precision stage is a critical component of wafer prober systems that provides nanometer-level positioning accuracy for semiconductor wafers during electrical testing. It enables precise alignment of wafer pads with probe needles, facilitates step-and-repeat testing patterns across the wafer surface, and ensures consistent contact force during probing operations. The stage typically features a granite or aluminum base for stability, with moving parts made of aluminum alloy, stainless steel, or ceramic. It is driven by linear motors or piezoelectric actuators, with position feedback from laser interferometers or optical encoders. The stage moves the wafer in X, Y, and sometimes Z axes with sub-micron accuracy, compensating for thermal expansion, vibration, and mechanical drift. Key parameters include a travel range of 200–300 mm, positioning accuracy of ±0.5 µm, repeatability of ±0.1 µm, resolution of 0.01 µm, and feedback resolution of 0.005 µm. Maximum load capacity is 10–20 kg, and maximum speed is 200–500 mm/s. Straightness and flatness are within ±1 µm. Operating temperature range is 15–30 °C, and humidity range is 20–80% RH. The stage has an ingress protection rating of IP54. The base material is typically aluminum 6061-T6, with granite available for higher stiffness. The stage weight is 50–100 kg. These values are reference ranges and must be verified with the manufacturer for specific models. The stage is designed for cleanroom environments and requires proper vibration isolation. Regular maintenance includes checking for wear, calibration, and ensuring cleanliness. Failure modes include drift, loss of accuracy, and mechanical wear. Verification questions should address calibration certificates, compliance with ISO 230-2, and environmental conditions.

Working Principle

The precision stage operates using high-resolution linear motors or piezoelectric actuators combined with laser interferometers or optical encoders for position feedback. It receives coordinate commands from the prober's control system and moves the wafer in X, Y, and sometimes Z axes with sub-micron accuracy, compensating for thermal expansion, vibration, and mechanical drift. The control system uses closed-loop feedback to adjust the position in real time, ensuring precise alignment. The stage's motion profile is optimized for step-and-repeat testing, with high speed and settling time considerations. The drive type is typically a linear motor for direct drive, offering high speed and precision; a ball screw alternative may be used for lower cost. The feedback resolution is 0.005 µm, enabling fine positioning. The stage's stiffness and damping characteristics are critical to minimize vibration and maintain accuracy. Thermal management is important to reduce drift, and the stage may include compensation algorithms. The operating principle ensures consistent contact force during probing, which is essential for reliable electrical testing.

Common Materials

Granite, Aluminum alloy, Stainless steel, Ceramic

Technical Parameters

Parameter	Typical range	Notes & selection driver
Travel Range (X/Y)	200–300 mm	Larger travel requires larger footprint and lower stiffness.
Positioning Accuracy	±0.5 µm	Critical for wafer alignment; tighter tolerance increases cost.ISO 230-2
Repeatability	±0.1 µm	Ensures consistent probing across multiple wafers.ISO 230-2
Resolution	0.01 µm	Minimum step size for fine positioning.
Maximum Load Capacity	10–20 kg	Includes wafer chuck and fixture weight.
Drive Type	Linear motor	Direct drive for high speed and precision; ball screw alternative for lower cost.
Feedback Resolution	0.005 µm	Optical encoder resolution; higher resolution improves accuracy.
Maximum Speed	200–500 mm/s	Higher speed reduces test time but may affect settling time.
Straightness/Flatness	±1 µm	Affects focus and probe contact uniformity.ISO 230-2
Operating Temperature Range	15–30 °C	Thermal drift affects accuracy; keep within range for specified performance.
Operating Humidity Range	20–80 % RH	Non-condensing; high humidity may cause corrosion.
Ingress Protection Rating	IP54	Protects against dust and water splashes; higher rating for harsh environments.IEC 60529
Material (Base/Stage)	Aluminum 6061-T6	Lightweight and stable; granite available for higher stiffness.ASTM B221
Weight	50–100 kg	Affects installation and vibration isolation requirements.

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

Base Plate Part
Provides rigid foundation and vibration damping

Material: Granite or polymer concrete
Linear Motor
Generates precise linear motion without mechanical contact

Material: Copper windings, neodymium magnets
Air Bearing
Creates frictionless motion using pressurized air

Material: Porous ceramic or carbon
Encoder Scale Part
Provides position feedback with nanometer resolution

Material: Glass with chromium grating
Chuck Assembly
Holds and secures the wafer during testing

Material: Aluminum or ceramic with vacuum channels
Piezoelectric Actuators Optional
Fine-motion drive used instead of the linear motor for sub-micron positioning.
Laser Interferometers Optional
Alternative position feedback device to the optical encoder scale.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Precision Stage.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Wafer Prober

View system integration details

Metrology Module

View system integration details

Manufacturers of Precision Stage

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Suzhou JiuJun Intelligent Equipment Co., Ltd.

Shanghai, CN

Also makes: Linear Motor, Precision CNC Machining Center, Linear Guideways and 7 more

Listed on the company's own website · profile compiled by CNFX from public sources

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Technical documentation

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Manufacturing capability

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Inspection readiness

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Frequently Asked Questions

What is the typical positioning accuracy of a precision stage?

The positioning accuracy is typically ±0.5 µm as per ISO 230-2, but this is a reference range. The actual value depends on the specific model and must be verified with the manufacturer.

What materials are commonly used for the stage base?

Common materials include aluminum 6061-T6 for the base, with granite available for higher stiffness. Other components may use stainless steel or ceramic. Material selection affects stability and weight.

How does the stage achieve sub-micron accuracy?

It uses high-resolution linear motors or piezoelectric actuators with laser interferometers or optical encoders for feedback. The control system compensates for thermal expansion, vibration, and drift.

What environmental conditions are required for operation?

The operating temperature range is 15–30 °C and humidity is 20–80% RH (non-condensing). The stage has an IP54 rating, protecting against dust and water splashes. Verify specific requirements with the manufacturer.

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.

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pressure:	Atmospheric (vacuum-compatible versions available)
other spec:	Positioning accuracy: ±0.1 μm, Repeatability: ±0.05 μm, Max velocity: 200 mm/s, Load capacity: 5-50 kg depending on model
temperature:	15°C to 30°C (operating), 5°C to 40°C (storage)

Precision Stage

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards