CLTE-XT 2-Layer Ultra-Thin 0.25mm PCB with Immersion Gold for RF and Antenna Applications
1.Introduction
Rogers CLTE-XT laminates are advanced composites of micro-dispersed ceramic filler, PTFE, and woven fiberglass reinforcement. They are engineered to improve loss tangent while providing the lowest insertion loss and highest degree of dimensional stability in their class. Building on the reliability of the CLTE laminates, CLTE-XT maintains its properties over an even wider temperature range, making it ideal for demanding RF and microwave applications.
2.Key Features
Composite material: Micro-dispersed ceramic filler, PTFE, and woven fiberglass
Dielectric Constant: 2.79 to 2.94 by thickness at 10GHz, 23°C @ 50% RH
Dissipation Factor: 0.0010 at 10GHz, 23°C @ 50% RH
CTE: X-axis 12.7 ppm/°C, Y-axis 13.7 ppm/°C, Z-axis 40.8 ppm/°C
Thermal Decomposition Temperature (Td): 539°C
Thermal Coefficient of Dielectric Constant: -8 ppm/°C
Tight dielectric constant tolerance: ±0.03
Low Moisture Absorption: 0.02%
3.Benefits
High plated through-hole reliability
Repeatable lot-to-lot performance
Reduced circuit losses without sacrificing dimensional stability
Dielectric constant stability with temperature change reduces stress attachment to ceramic active devices
4.PCB Construction Details
| Parameter | Specification |
|---|---|
| Base Material | CLTE-XT |
| Layer Count | 2 layers |
| Board Dimensions | 63mm x 35mm (±0.15mm) |
| Min. Trace/Space | 5/6 mils |
| Min. Hole Size | 0.3mm |
| Blind Vias | No |
| Finished Thickness | 0.25mm |
| Cu Weight (Outer) | 1 oz (1.4 mils) |
| Via Plating Thickness | 20 μm |
| Surface Finish | Immersion Gold |
| Top Silkscreen | No |
| Bottom Silkscreen | No |
| Top Solder Mask | No |
| Bottom Solder Mask | No |
| Electrical Test | 100% tested prior to shipment |
5.PCB Stackup (2-Layer Rigid Structure)
Copper_layer_1 - 35 μm
Rogers CLTE-XT Core - 0.129mm (5.1mil)
Copper_layer_2 - 35 μm
6.PCB Statistics:
Components: 6
Total Pads: 27
Thru Hole Pads: 15
Top SMT Pads: 12
Bottom SMT Pads: 0
Vias: 8
Nets: 2
7.Typical Applications
Advanced Driver Assistance Systems (ADAS), Patch Antennas, Phased Array Antennas, Power Amplifiers, Ground-based and airborne communications and radar systems.
8.Quality Assurance
IPC-Class 2 compliant
100% electrical tested
Global availability
Gerber RS-274X support