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Pressure Conductive Silicone Rubber (PCR)

Pressure Conductive Silicone Rubber (PCR) is a type of conductive interface material consisting of conductive powder uniformly dispersed within silicone rubber. Without any soldering connection, a stable electrical path is formed under applied pressure, enabling non-destructive electrical contact between the chip and test boards.
Compared to traditional pogo-pin-based contact methods, PCR offers superior signal integrity and controlled contact force, significantly reducing the risk of damaging chip contact balls during testing.

PCR provides multiple benefits—including high-frequency transmission capability, low contact resistance, minimal mechanical impact on chip contact balls, and ease of replacement—making it especially ideal for advanced package testing in high-speed and high-frequency applications. It is widely used in Burn-in Boards, Load Boards, and System Level Test (SLT) sockets. By integrating PCR into the test socket design, test accuracy and yield are enhanced while ensuring chip protection.

  • What can iST do for you

    iST offers high-performance PCR solutions characterized by fast lead time and outstanding durability. Our PCR material is engineered to withstand up to 100K mating cycles at 85°C and maintains a stable FSR (Force vs. Stroke vs. Resistance) profile, meeting the demanding requirements of advanced packaging and high-frequency testing.

    Key Features of iST’s PCR Material:

    • Life time: Over 100K mating cycles at 85°C
    • Contact Resistance: <30 mΩ at 25°C, <90 mΩ at 125°C, delivering consistent electrical continuity throughout the test process.
    • Operating Temperature Range: -40°C to 150°C. Designed for reliability in harsh test environments.
    • Signal Frequency Support: Up to 40 GHz, meeting advanced requirements for high-speed data transmission.
    • Current Capacity: Supports 1.5–4A, applicable to diverse testing scenarios.
    • Contact Force: 15–50 gf, minimizing damage to DUT contact balls
    • Product Thickness: 0.5–1.2 mm, allowing flexible integration into various test socket designs.
    • Fine-Pitch Support: >0.3 mm pitch
    FSR Characteristic Curve

    iST’s PCR achieves stable low-impedance contact (<30 mΩ) even under low stroke force, adaptable for high-speed, high-frequency testing.

Why Choose iST PCR?

1

High-Performance Specs: 40 GHz bandwidth, low contact resistance, high current support.

2

Exceptional Reliability: Over 100K mating cycles at 85°C for long-term use.

3

Fast Delivery & Customization: Flexible to meet diverse design needs.

4

Pogo Pin Replacement: Lower contact force, protect contact balls, easy to replace, excellent signal integrity.

  • Application Scope
  • Burn-in Board Sockets: High-temperature endurance and long lifecycle.
  • Load Board (Final Test Stage): Stable low-pressure contact, minimizes contact balls damage during production testing.
  • System Level Test (SLT): Designed for extended reliability tests with low contact resistance.
  • PCB to Substrate Interface: Supports fine-pitch designs, solder-free, easy replacement, and highly stable connectivity.
  • Sample Image

Contact Window |  Ms. Lin/Aaliyah  |  Tel:+886-3-5799909#8890 |  Email:HWBU_Sales@istgroup.com

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