TMM4 PCB 2-layer 25mil

WELCOME TO BICHENG

Shipped:14th-Dec-2023

1. TMM4 Introduction
Rogers TMM 4 thermoset microwave material is a ceramic, hydrocarbon, thermoset polymer composite designed for high plated-thru-hole reliability strip-line and micro-strip applications.

TMM 4 thermoset microwave materials have strong mechanical and chemical properties combine many of the benefits of both ceramic and traditional PTFE laminates without requiring the specialized production techniques common to those materials. TMM4 laminates are based on thermoset resins, making them reliable for wire-bonding without pad lifting or substrate deformation.

2. Features
- Dielectric constant (Dk) of 4.50 +/- .045
- Dissipation factor of .0020 at 10GHz
- Thermal coefficient of Dk of 15ppm/°K
- Coefficient of thermal expansion matched to copper
- Coefficient of Thermal Expansion: x of 16 ppm/°K, y of 16 ppm/°K, z of 21 ppm/°K
- Decomposition Temperature (Td) of 425 °C TGA
- Thermal Conductivity of 0.7 W/mk
- Moisture absorption of 0.07%-0.18%
- Available in a thickness range of .0015 to .500 inches (+/- .0015”)

3. Benefits
- Mechanical properties resist creep and cold flow
- Resistant to process chemicals, reducing damage during fabrication
- Based on a thermoset resin, allowing for reliable wire-bonding
- High reliability of plated through holes
- All common PWB processes can be used with TMM 4 materials

4. PCB Stackup: 2-layer rigid PCB
Copper_layer_1 - 35 μm
Rogers TMM4 Core - 0.635 mm (25mil)
Copper_layer_2 - 35 μm

5. PCB Construction details:
- Board dimensions: A circle of diameter 83mm, +/- 0.15mm
- Minimum Trace/Space: 6/8 mils
- Minimum Hole Size: 0.35mm
- No Blind vias.
- Finished board thickness: 0.8mm
- Finished Cu weight: 1oz (1.4 mils) outer layers
- Via plating thickness: 20 μm
- Surface finish: Immersion Gold
- Top Silkscreen: White
- Bottom Silkscreen: No
- Top Solder Mask: Green
- Bottom Solder Mask: No
- 100% Electrical test used prior to shipment

6. PCB Statistics:
Components: 26
Total Pads: 91
Thru Hole Pads: 65
Top SMT Pads: 26
Bottom SMT Pads: 6
Vias: 85
Nets: 3

7. Type of artwork supplied: Gerber RS-274-X

8. Accepted standard: IPC-Class-2

9. Availability: worldwide

10. Typical applications
- RF and microwave circuitry
- Power amplifiers and combiners
- Filters and coupler
- Satellite communication systems
- Global Positioning Systems Antennas
- Patch Antennas
- Dielectric polarizers and lenses
- Chip testers

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