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STI CO., LTD.

Daegu,  Korea (South)
https://www.sti.kr/
  • Booth: B2027

🔷 Fused Silica by STI optimized for semiconductor!

Overview

📌 Heraeus is using our REFLOW SYSTEM

STI manufactures high-purity fused silica ingots optimized for semiconductor and precision optics applications.
Utilizing VAD (Vapor-phase Axial Deposition) and OVD (Outside Vapor Deposition) technologies, we ensure excellent homogeneity, thermal stability, and optical clarity throughout the material.

Key Features

  • Fluorescence-Free: Ensures stable optical performance even under high temperature or UV exposure

  • High Purity: Ultra-low metal and hydroxyl (OH) impurities

  • Outstanding Thermal Stability: Maintains structure without deformation or cracking at elevated temperatures

  • 3D Homogeneity: Consistent optical and chemical properties across the entire ingot volume


Applications

  • Semiconductor process components and quartzware

  • Optical lenses and protective windows

  • Lithography, deposition, and etching system parts

  • UV light source components, laser covers, and sensors


  Products

  • SiC PVT Growth Furnace
    STI's SiC PVT Growth Furnace offers optimized temperature control, adjustable MF coil, customizable design, complete data logging, and advanced safety features to ensure top reproducibility and safety....

  • ** Features **

    1. Temperature Gradient Control: Effectively controls the temperature gradient of both raw material and growth portions, critical for PVT growth.

    2. Adjustable MF Coil Positioning: Easily adjusts the MF coil position to create a suitable △T for hot-zone growth.

    3. Customizable Equipment: Manufactures equipment tailored to each customer's specific growth process requirements.

    4. Data Logging: Records all data from the 3-5 day growth process accurately.

    5. Optimized Sytem Matching: Ensures optimal matching of MF-Coil, Growing Reactor, and Oscillator through simulation analysis and power control.

    6. Safety and Reproducibility: Features a self-developed control system with safety protection for high-value components, offering superior reproducibility and safety in PVT-SiC growth.

    ** Specification **

    1. Temperature: MAX 2,500℃ (2,100~2,400℃)

    2. Equipment Size(mm): 4 inch (W1500xD2200xH3500) / 6 inch (W1500xD2500xH4100) / 8 inch (W1650xD2600xH4100)

    3. Heating Method: MF Induction Heating

    4. Resonant Frequency(kHz): 9~11

    5. Power Suuply(kW): 4 inch: 10~15 / 6 inch: 12~17 / 8 inch: 15~20

    6. Quartz ID(Inner Diameter): 4 inch: Ø280 / 6 inch: Ø395 / 8 inch: Ø438

    7. Reactor Quartz Tube: Single Tube Air Cooling

  • High Quality Synthetic Quartz
    STi produces high-quality synthetic quartz with high purity, low-OH, and excellent optical properties through the VAD and OVD processes, offering products in various forms such as welding rods, rods, and disks....

  • * Features : Good Transmittance, High Purity Materials, Low OH- Contents
    * Product Application Semiconductor parts : Focus ring, Cylinder tube, Photomask substrate, etc.

  • SiC Powder
    STI Co., Ltd. specializes in high-quality SiC (Silicon Carbide) powder with excellent thermal conductivity, hardness, and chemical resistance. Ideal for semiconductors, abrasives, and advanced ceramics....

  • * Types of Silicon Carbide Powder 

    1. Beta Phase SiC Powder

       1) Features

          - Outstanding mechanical properties

          - Thermal Conductivity

          - High Purify Materials

          - Diamater (Size) : 1 ~ 100 μm / Total Purity : 10 ~ 1,000 ppm

       2) Product Application

          - Ceramic Composites

          - High Thermal Materials 

          - Ink Composites

    2. Alpha Phase SiC Powder

       1) Features

          - Outstanding mechanical properties

          - Thermal Conductivity

          - High Purify Materials

          - Diamater (Size) : 100 ~ 1,000 μm / Total Purity : 1 ~ 100 ppm

       2) Product Application

          - Ceramic Composites

          - High Thermal Materials 

          - SiC Ingot Source Materials

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