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Importance of Probe Testing in Semiconductor Wafer Production Improving Test Accuracy with Gantry Structure

Enhancing Test Accuracy with Gantry Structure

Precision wafer placement is essential for pre-encapsulation detection and testing. It frequently faces the issue of misjudging good-quality chips as defective (Overkill), forcing retesting. The extra time spent leads in lower manufacturing efficiency, making it a challenging position.

Conducting probe testing on semiconductor wafers is a crucial phase in ensuring product yield once semiconductor wafer production is completed. The probe perfectly aligns itself within the X and Y planes of the wafer before vertically positioning along the Z-axis to reach the predefined test locations during this electrical measuring process. Input signals are then applied, setting off a continuous testing operation. After collecting feedback data, the product's quality is identified.

 

Operators who are inexperienced with the equipment during probe testing may dramatically reduce test accuracy. To address this, a gantry structure was created to ensure 100% stability during probing and electrical measurements while also reducing overall testing complexity. Customers can use this design to precisely position wafers in the X and Y planes, ensuring the stability and precision of semiconductor wafer probing.

 

Diagram depicting the relationships between probes, electrical contact points, grains, and wafers in wafer testing.

What exactly is Dual-drive gantry stage?

"Simply put, it means each axis controls a motor, and the two motors move and stop together, jointly controlling the same mechanical axis." (For additional information on gantry synchronous motion, see this article.)

The pain points​ and solution

In the context of telecommunications testing, mistakes or inappropriate handling of probe placements might result in probes striking areas beyond the contact sites. This condition could cause a circuit break or electrical leakage, lowering the accuracy of wafer test results.

To overcome this issue, Acepillar provides a system that combines a Dual-drive gantry stage with high-precision Magnescale Linear encoder to deliver accurate position input. This combination ensures high-precision operation in probe testing, preventing accidental contact.

In pre-packaging wafer testing, it is frequently necessary to test a large number of wafers at the same time.

The huge workspace allows for the simultaneous testing of PCB boards placed in a matrix as well as a greater number of wafers, increasing production efficiency.

Semiconductor wafers represent cutting-edge precision technology, and it's crucial to consider safeguards in case of a power outage.

To address this concern, an absolute-type servo system is employed. This system memorizes the position during a power outage and autonomously corrects any deviations when power is restored. By doing so, it guarantees that the system seamlessly resumes operation with precise motion paths, ensuring the accuracy of the testing process.

The Dual-drive gantry stage is a perfect option, providing extremely high machine precision and accurate alignment capabilities. It is ideal for applications requiring the testing of an extensive amount of organized components. When combined with diverse program development and equipment planning, it enables equipment developers to quickly delve into semiconductor applications, fulfilling client demands for precise motion control and load requirements.

We offer professional evaluations, site surveys, and planning.

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Copyright © ACE PILLAR Co., Ltd.

  • Solution
    • Smart Manufacturing
    • Semiconductor process
    • Smart Energy
    • Smart Medical/ Food Manufacturing
    • AIoT
  • Products
    • Motion Control and Monitor
      • IPC
      • Motion Controller
      • CNC Controller
      • PLC
      • HMI
      • Ethernet Solution
      • Remote I/O
      • Static Eliminator
      • Sensor
      • Power Supplier
      • High-Precision Measurement
    • VFD and Servo Drives
      • VFDs and Smart Energy Saving
      • Elevator-Specific Variable Frequency Drive
      • Permanent-Magnet Synchronous Motor
      • Servo Motor
      • Linear Motor
      • DD Motor
      • Slide Module
      • Precision Positioning
    • Mechanical Transmission
      • Reducer
      • Coupling
      • Power Lock
      • Electromagnetic Clutch
      • Safety Brake
      • LED
      • Ball Screw / Linear Guide
      • Ball Bearing​​​​​​​ / Freebear
    • Pneumatic Fluid Components
      • F.R.L Combination
      • Solenoid Valve
      • Fluid Valve
      • Cylinder
      • Liquid Valve
      • Fitting
      • Vacuum Pump
      • Hydraulic
      • Flow Switch
      • Reed Switch
      • Others
    • Robotics and Machine Vision
      • Robotic Arm
      • Machine Vision
    • Strapping Machines and Other Equipment
      • TRANSPAK · A World-Class Strapping Machine Brand
      • Strapping Machine
      • Electric Servo Press
      • Smart Screwdriving System
    • Charging Pile & Energy
    • Software
  • Brand
  • Support
    • RMA
    • Technical Services
    • Warranty
    • Catalog
  • Sustainability Strategy
    • Foreword
      • President’s Message
      • ACE PILLAR's Introduction
      • Sustainable Development
      • Stakeholder Communication
    • Corporate Governance Operation
      • Governance
      • Legal Compliance and Code of Conduct
      • Risk Management
      • Financial Performance
      • Information Security
    • Business Partnership
      • Customer Commitment
      • Supplier Sustainability Management
    • Create Shared Value
      • Employee Overview
      • Learning and Development
      • Human Rights Management
      • Pursuing Happiness in the Workplace
      • Corporate Social Responsibility
    • Sustainable Environment
      • Climate Strategy and Carbon Management
      • Operational Environment Management
    • ESG Report
    • Stakeholder Questionnaire
  • How to Buy
    • Contact Us
    • E-commerce shop
  • About
    • About ACE PILLAR
    • History
    • Investors
    • Human Resources
  • Support
    • News
    • Locations
    • Catalog
  • Others
    • Internal Links
    • Privacy Policy
    • Contact Us
    • Newsletter
  • ACE PILLAR Subsidiary Website
    • Tianjin ACE PILLAR Co., Ltd.
    • Standard Technology Corp.
    • ACE Energy Co., Ltd.
    • BlueWalker GmbH
    • TRANSPAK EQUIPMENT CORPORATION
Language