In advanced semiconductor packaging, warpage during reflow soldering often ruins precision. For semiconductor engineers, selecting the right fixture material directly impacts yield and reliability.That’s why engineers now specify PEEK Sheet for high-temp jigs. Unlike traditional plastics, PEEK Plastic Sheet maintains high dimensional stability at 260°C. For fabs upgrading to Fan-Out and 2.5D packaging, Polyetheretherketone Sheet replaces epoxy resin boards—cutting rework rates by 40% while surviving 500+ thermal cycles.
AHD Polymer, with 32 years of engineering plastic manufacturing expertise, provides high-performance PEEK Sheet solutions tailored for high-temperature applications.
Why high temperature stable materials are required for advanced packaging
1. The Challenge of Heat in Modern Packaging
Advanced packaging (2.5D/3D, SiP, Fan-out) includes: Extreme thermal conditions.
Reflow soldering: 230-260°C peak temp
Thermal Cycling: 1000+ Cycles -55°C to 150°C
High temperature testing: 125-200C for reliability verification
Critical limitations of traditional materials like PPS and PI:
PPS: Deforms >200°C, CTE 50ppm/C
PI: Expensive, poor chemical resistance
2. PEEK Sheet: The Perfect Thermal Stability Solution
PEEK Sheet (Polyetheretherketone) is a semi crystalline thermoplastic with:
Melting point 343 °C
glass transition temperature (Tg) 143 °C
Operating temperature: continuous 260°C
CTE: 25-30 ppm/°C (very good match to silicon)
Polyetheretherketone Sheet Dimensional stability 260°C, <0.02% deformation after 500 thermal cycles. This is better than PPS (1.2% deformation).
PEEK Sheet vs. Traditional Materials: Performance Comparison
| Parameter | PEEK Sheet | PPS Sheet | PI Sheet |
| Continuous Temp (°C) | 260 | 200 |
250
|
| Tg (°C) | 143 | 85 | 360 |
| CTE (ppm/°C) | 27 | 50 | 35 |
| Tensile Strength (MPa) | 100 | 70 | 85 |
| Flexural Modulus (GPa) | 3.8 | 2.5 | 3.2 |
| Deformation @260°C | <0.02% | 1.2% | 0.1% |
Advantages of PEEK Plastic Sheet in Semiconductor Fixtures
1. Exceptional Dimensional Stability
PEEK Plastic Sheet’s low CTE (27 ppm/°C) minimizes thermal expansion mismatch with silicon (2.6 ppm/°C). This prevents fixture warping during reflow soldering, ensuring precise chip positioning and reducing assembly defects by up to 40%.
2. Superior Chemical Resistance
Polyetheretherketone Sheet resists most semiconductor chemicals:
Acids: HCl, H2SO4 (except concentrated)
Bases: NaOH, KOH
Solvents: Acetone, IPA, xylene
This stability prevents material degradation in wet cleaning processes, extending fixture lifespan to 5+ years.
3. Ultra-Low Outgassing and Particle Generation
PEEK Sheet meets SEMATECH E595 outgassing standards:
Total mass loss (TML): <0.1%
Collected volatile condensable materials (CVCM): <0.01%
Low particle generation (<0.1 particles/cm³) ensures cleanroom compliance for 5nm/3nm processes, reducing contamination risks.
Real-World Applications in Advanced Packaging
1. Reflow Soldering Jigs
Application: 2.5D interposer fixtures, Fan-out wafer-level packaging (FOWLP) carriers
Process: 260°C peak, 5 min duration
PEEK Sheet Performance: Flatness within ±0.03mm, no warpage after 1000 cycles
Result: Fixture replacement cost down 60% (92% to 99.5% yield increase)
2. Sockets for High-Temperature Testing
Application GPU/CPU test sockets Memory module holders
Process: 150-200 °C, 48 hour continuous test
PEEK Sheet Performance: Zero creep; stable contact resistance <50mΩ
Test accuracy improved, socket life increased 3x over PPS
3. Wafer Handling Parts
Application Wafer chucks End effectors Transport trays
Processing: 125-180°C vacuum chucks
PEEK Sheet Performance Vacuum Integrity No particle transfer to wafer
Result: Wafer scratch rate < 0.01 %
AHD Polymer: Your Reliable PEEK Sheet Supplier
32 Years of Engineering Plastics Experience
Since 1994, AHD Polymer has been a specialist in high-performance plastic sheets and rods. Features of our PEEK Sheet:
Certified to ISO 9001/14001
Vertical integration: from the raw material to the finished product
Precision machining Tight tolerances
Complete Range of PEEK Products
We offer full series of engineering plastic sheets and rods, as follows:
PEEK Sheet/Plate Thickness 1- 120 mm Standard size 610*1220mm.
ESD PEEK Sheet : Surface resistance 10 6-10 9Ω for ESD sensitive applications.
Glass/carbon fiber reinforced PEEK: Improved mechanical properties.
Uncompromising Quality Control
Performance compliance ASTM and SEMATECH compliant.
Delivery Rate: 99.8% on-time; defect rate 0.02%.
Third party test: RoHS certified by SGS.
Customized Solutions and Volume Benefits
Custom Fabrication: CNC machining, drilling, routing to print.
Fast sampling: 3-day prototype delivery.
Volume pricing: Save on quantity orders .
Technical support: Material selection, process consulting, design optimization.
Choosing the Correct PEEK Sheet for Your Application
1. Selection criteria of keys
Temperature requirement: Use unfilled PEEK < 250°C, carbon-filled > 250°C.
ESD protection: ESD PEEK Sheet for static sensitive components.
Dimensional Tolerance: High accuracy fixtures, Precision Grade PEEK (±0.02mm).
Chemical resistance: Unfilled PEEK for general chemicals; reinforced for environment severity.
2. Step by step implementation
Define thermal and mechanical requirements (temperature, CTE, flatness) .
PEEK Sheet grade: unfilled, ESD, glass/carbon filled.
Establish dimensions and machining tolerances.
Get a sample and download a performance test report of AHD Polymer.
If needed, adapt the design Validate in the real process.
Q1: What is the maximum temperature PEEK Sheet can withstand?
A1: PEEK Sheet offers a continuous use temperature of 260°C, with short-term exposure up to 300°C. It maintains structural integrity and dimensional stability even at these elevated temperatures, making it ideal for reflow soldering and high-temperature testing processes.
Q2: How does PEEK Sheet compare to PI in terms of cost and performance?
A2: While PI (Polyimide) has a higher Tg (360°C), PEEK Sheet provides a better balance of performance and cost. PEEK offers comparable chemical resistance and mechanical strength at 30-50% lower cost than PI. Additionally, PEEK is easier to machine and recyclable, further reducing total ownership cost.
Q3: Can AHD Polymer provide ESD-safe PEEK Sheet for semiconductor applications?
A3: Yes. AHD Polymer supplies ESD PEEK Sheet with surface resistance controlled at 10⁶-10⁹Ω. Our ESD PEEK uses a proprietary conductive filler dispersion technology, ensuring uniform resistance across the sheet and preventing static damage to sensitive components.
