Astra® MT77
Ultra Low Loss, RF/MW Laminate and Prepreg
Astra® MT77 materials are a breakthrough, very low-loss dielectric constant (Dk) product for millimeter wave frequencies and beyond.
Thermal Performance |
Electrical Performance |
Industry Approvals |
|
Tg:
200°C
Td: 360°C |
Dk:
3.00
Df: 0.0017 |
IPC-4103 /17
UL - File Number E41625
|
Thermal Performance
Td: 360°C
Electrical Performance
Df: 0.0017
Industry Approvals
Astra MT77 laminate materials exhibit exceptional electrical properties which are very stable over a broad frequency and temperature range. Astra MT77 is suitable for many of today’s commercial RF/microwave printed circuit designs. It features a dielectric constant (Dk) that is stable between -40°C and +140°C at up to W-band frequencies. In addition, Astra MT77 offers an ultra-low dissipation factor (Df) of 0.0017, making it a cost-effective alternative to PTFE and other commercial microwave laminate materials.
Key applications include long antennas and radar applications for automobiles, such as adaptive cruise control, pre-crash, blind spot detection, lane departure warning and stop and go systems.
Attributes
Markets
Product Features
- Industry Recognition
- UL File Number: E41625
- RoHS Compliant
- PFAS Free
- Performance Attributes
- Lead-free assembly compatible
- Processing Advantages
- FR-4 process compatible
- Short lamination cycle
- Reduced drill wear
- No plasma desmear required
- Good flow and fill
- Dimensional stability
- Multiple lamination cycles
- Any layer technology compatible
- HDI technology compatible
- VIPPO design compatible
Production & Manufacturing
Currently manufactured in Asia, North America, Europe
Product Availability
- Standard Material Offering: Laminate
- 2.5, 5, 7.5, 10, 12.5, 15, 20, 30, 60 mil ( 0.0635, 0.127, 0.1905, 0.254, 0.3175, 0.381, 0.510, 0.760, 1.50 mm)
- Copper Foil Type
- HVLP (VLP2) ≤2.5 micron Rz JIS
- Embedded resistor foil
- Copper Weight
- ½, 1 and 2 oz (18, 35 and 70 µm) available
- Thinner copper foil available
- Standard Material Offering: Prepreg
- Tooling of prepreg panels
- Moisture barrier packaging
| Property | Typical Value | Units | Test Method | |
|---|---|---|---|---|
| Metric (English) | IPC-TM-650 (or as noted) | |||
| Glass Transition Temperature (Tg) by DSC | 200 | °C | 2.4.25C | |
| Decomposition Temperature (Td) by TGA @ 5% weight loss | 360 | °C | 2.4.24.6 | |
| Time to Delaminate by TMA (Copper removed) |
A. T260 B. T288
|
>60 | Minutes | 2.4.24.1 |
| Z-Axis CTE |
A. Pre-Tg B. Post-Tg
|
50 - 70 250 - 350
|
ppm/°C | 2.4.24C |
| X/Y-Axis CTE | Pre-Tg | 12 | ppm/°C | 2.4.24C |
| Thermal Conductivity | 0.45 | W/m·K | ASTM E1952 | |
| Thermal Stress 10 sec @ 288ºC (550.4ºF) |
A. Unetched B. Etched
|
Pass | Pass Visual | 2.4.13.1 |
| Dk, Permittivity |
A. @ 2 GHz B. @ 10 GHz
|
3.00 | — | 2.5.5.5 |
| Df, Loss Tangent |
A. @ 2 GHz B. @ 10 GHz
|
0.0017 | — | Bereskin Stripline |
| Volume Resistivity | C-96/35/90 | 1.33 x 107 | MΩ-cm | 2.5.17.1 |
| Surface Resistivity | C-96/35/90 | 1.33 x 105 | MΩ | 2.5.17.1 |
| Dielectric Breakdown | 45.4 | kV | 2.5.6B | |
| Arc Resistance | 139 | Seconds | 2.5.1B | |
| Electric Strength (Laminate & laminated prepreg) | 45 (1133) | kV/mm (V/mil) | 2.5.6.2A | |
| Comparative Tracking Index (CTI) | 3 (175-249) | Class (Volts) |
UL 746A ASTM D3638 |
|
| Peel Strength | 1 oz. EDC foil | 1.0 (5.7) | N/mm (lb/inch) | 2.4.8.3 |
| Flexural Strength |
A. Length direction B. Cross direction
|
338 (49.0) 269 (39.0)
|
MPa (kpsi) | 2.4.4B |
| Tensile Strength |
A. Length direction B. Cross direction
|
214 (31.0) 165 (24.0)
|
MPa (kpsi) | ASTM D3039 |
| Poisson's Ratio |
A. Length direction B. Cross direction
|
0.183 0.182
|
— | ASTM D3039 |
| Moisture Absorption | 0.1 | % | 2.6.2.1A | |
| Flammability (Laminate & laminated prepreg) | V-0 | Rating | UL 94 | |
| Relative Thermal Index (RTI) | 130 | °C | UL 796 | |
| The data, while believed to be accurate and based on analytical methods considered to be reliable, is for information purposes only. Any sales of these products will be governed by the terms and conditions of the agreement under which they are sold. | ||||
NOTE
Visit our site http://www.isola-group.com for more details.
Revisions:
A: Initial release - 4/17
B: Corrected units for Flexural and Tensile Strength - 8/18
C: Change MOT to RTI 5/19
D: Changed VLP2 to HVLP to align with common industry terms 4/21
Core Data
| Standard/ Alternate | Thickness (inch) | Thickness (mm) | Dielectric Constant (DK)/ Dissipation Factor (DF) | ||||
|---|---|---|---|---|---|---|---|
| 2 GHz | 5 GHz | 10 GHz | 15 GHz | 20 GHz | |||
| Standard | 0.0025 | 0.064 | 3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
| Standard | 0.0050 | 0.127 | 3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
| Standard | 0.0075 | 0.191 | 3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
| Standard | 0.0100 | 0.254 | 3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
| Standard | 0.0125 | 0.318 | 3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
| Standard | 0.0150 | 0.381 | 3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
| Standard | 0.0200 | 0.508 | 3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
| Standard | 0.0300 | 0.762 | 3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
| Standard | 0.0600 | 1.524 | 3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
3.00 0.0017 |
Prepreg Data
| Glass Style | Resin Content % | Thickness (inch) | Thickness (mm) | Dielectric Constant (DK)/ Dissipation Factor (DF) | ||||
|---|---|---|---|---|---|---|---|---|
| 2 GHz | 5 Ghz | 10 Ghz | 15 Ghz | 20 Ghz | ||||
| 1035 | 73.00% | 0.0025 | 0.064 | 2.97 0.0019 |
2.97 0.0019 |
2.97 0.0019 |
2.97 0.0019 |
2.97 0.0019 |
| 1067 | 72.00% | 0.0025 | 0.064 | 2.98 0.0019 |
2.98 0.0019 |
2.98 0.0019 |
2.98 0.0019 |
2.98 0.0019 |
| 1067 | 77.00% | 0.0032 | 0.081 | 2.91 0.0018 |
2.91 0.0018 |
2.91 0.0018 |
2.91 0.0018 |
2.91 0.0018 |
| 1078 | 70.00% | 0.0036 | 0.091 | 3.01 0.0019 |
3.01 0.0019 |
3.01 0.0019 |
3.01 0.0019 |
3.01 0.0019 |
| 1078 | 74.00% | 0.0042 | 0.107 | 2.95 0.0019 |
2.95 0.0019 |
2.95 0.0019 |
2.95 0.0019 |
2.95 0.0019 |
NOTE
Revisions:
A-Original-4/17
B-Added Standard & Alternate construction-8/18
C-Corrected 12.5 mil to mm conversion - 5/24
Standard-Commonly available with the best availability.
Alternate-Available, but not stocked with longer lead time
| Resource Title & Summary | Date Updated |
|---|---|
| Astra® MT77 Laminate Supplemental | 03/20/2024 |
| Astra® MT77 Prepreg Supplemental | 03/20/2024 |
| Isola Laminate Outgassing Data Properties | 03/22/2024 |
| Astra® MT77 Processing Guide | 06/18/2020 |
| Astra® MT77 Laminate Safety Data Sheet | 07/21/2020 |
| Astra® MT77 Laminate RoHS Declaration | 03/20/2024 |
| Astra® MT77 Prepreg RoHS Declaration | 03/20/2024 |
| Astra® MT77 Prepreg Safety Data Sheet | 07/21/2020 |
Resources
PCB Material Selection for RF, Microwave and Millimeter-wave Design
This presentation discusses Printed Circuit Board (PCB) attributes for RF, microwave, millimeter-wave systems through an application example using an advanced automotive safety system.
New Thermoset PCB Materials Improve Millimeter Wave Performance and Reliability at Reduced Cost
This presentation discusses the following: - Printed Circuit Board (PCB) - Requirements for Operation in mmWave Frequency Band - Requirements for Automotive Safety Systems - Available Materials - Case Study: Automotive RADAR
Laminate & Prepreg Manufacturing
This presentation describes the process of laminate and prepreg manufacturing.
Enabling Lower Cost Advanced Automotive Safety Systems Through Hybrid PCB Construction
This presentation describes Printed Circuit Board (PCB) requirements for advanced automotive safety systems; hybrid PCB construction and benefits and material availability.
Thermosets’ Cost and Reliability Advantages for Automotive Radar PCBs
This paper discusses how new thermoset resins are emerging as a viable alternative for advanced automotive safety systems by offering cost and reliability advantages over
Conductive Anodic Filament Growth Failure
This paper provides describes Isola's work in finding the right combination of process and design conditions for improved CAF resistant products.