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VT-42C Laminate/Prepreg
UL Approval: E214381 Version: Rev. B4 19/03/2020 /97General Information
- Comparative Tracking Index (CTI): over 600 Volts
- Dicy Cured System
- Standard FR4.0
- UV Blocking
Application
Power Base Board, TV, Refrigerator, Washing Machine, etc
Availability
- Core Thickness: 0.004” (0.1mm) to 0.200” (5mm), available in sheet or panel form
- Copper Foil: 1/4oz to 12oz
- E-Glass styles: 7628, etc
- Prepregs are available in roll or panel form
Note: As CTI value is closely related with the surface roughness, we would like to supply reverse treated copper foil when customers ask for laminates with copper foil over 2 oz.
Properties Prepreg Laminate Storage Condition Temperature Below 23°C (73°F) Below 5°C (41°F) Room Relative humidity Below 55% RH / / Shelf Life 3 months 6 months 24 months (airproof) The prepreg exceeding shelf life should be retested.
Properties Sheets IPC-4101E /97
Properties Test Method Units Specification Typical Value Thermal Properties Tg DSC IPC-TM-650 2.4.25 °C 110 minimum 125~130 TMA IPC-TM-650 2.4.24 °C - - Td ASTM D3850 °C - 310 T260 IPC-TM-650 2.4.24.1 Minute - 25 T288 IPC-TM-650 2.4.24.1 Minute - 2 Thermal Stress @ 288°C IPC-TM-650 2.4.13.1 Second Pass 10s 300 Z-axis CTE Before Tg IPC-TM-650 2.4.24 ppm/°C - 40 After Tg IPC-TM-650 2.4.24 ppm/°C - 220 Total Expansion (50~260°C) IPC-TM-650 2.4.24 % - 3.5 X-Y CTE IPC-TM-650 2.4.24 ppm/°C - 12~14 MOT UL 94 °C - 130 Electrical Properties Dielectric Constant @ 1GHz IPC-TM-650 2.5.5.9 - 5.4 maximum 4.8 Dissipation Factor @ 1GHz IPC-TM-650 2.5.5.9 - 0.035 maximum 0.018 Volume Resistivity After Moisture Resistance IPC-TM-650 2.5.17.1 MΩ-cm 1.0E+6 minimum 5.0E+8 E-24/125 IPC-TM-650 2.5.17.1 MΩ-cm 1.0E+3 minimum 5.0E+6 Surface Resistivity After Moisture Resistance IPC-TM-650 2.5.17.1 MΩ 1.0E+4 minimum 5.0E+7 E-24/125 IPC-TM-650 2.5.17.1 MΩ 1.0E+3 minimum 5.0E+6 Electrical Strength IPC-TM-650 2.5.6.2 Volt/mil (KV/mm) 762 (30) minimum 1200~1400 (54) Dielectric Breakdown IPC-TM-650 2.5.6 KV 40 minimum 60 Comparative Tracking Index (CTI) ASTM D3638 Rating (Volt) - Grade 0 (≥600) Arc Resistance ASTM D495 Second - 111 Mechanical Properties Peel Strength (1oz) As received IPC-TM-650 2.4.8 lb/in (N/mm) - 10~12 (1.7~2.0) After thermal stress IPC-TM-650 2.4.8 lb/in (N/mm) 6 (1.05) minimum 9~12 (1.5~2.0) Flexural Strength Warp IPC-TM-650 2.4.4 KPsi (MPa) 60 (415) minimum 87 (600) Fill IPC-TM-650 2.4.4 KPsi (MPa) 50 (345) minimum 72 (500) Physical Properties Moisture Absorption IPC-TM-650 2.6.2.1 % 0.80 maximum 0.25 Flammability UL-94 Rating V-0 minimum V-0 All test data provided are typical values and not intended to be specification values.
Published on: 19/03/2020
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VT-42C CCL/Laminate VT-42C PP/Prepreg
UL Approval: E214381 Version: Rev. B2 28/06/2018 /97Storage Condition & Shelf Life
Precautions In Handling
- The prepreg exceeding shelf time should be retested.
- Take care in handling thin core laminates as they are easily damaged.
- If the pre-preg is not consumed within 48hrs after opening the vacuum package, it is recommended that the bags be resealed.
- Material is available in both long and short grain. The grain direction is indicated on the label with an arrow.
Designing And Inner Layer Process
- Please be careful when single ply of 1080, 1086, 1078 or 106 prepreg is designed to the dielectric layer.
- Dimension stability is the same as Standard FR4 material.
- Please check with your oxide vendor to make sure that our material is suitable with your oxide process. We recommend to control the peel strength with brown oxide copper over 2 Lb/in.
- For unclad or single sided laminates to be used in multilayer, please brush unclad sides before use.
Press Condition
1. Heating rate(Rise of Rate) of material [Material Temperature]
Programmable Press: 1.5-3.0℃/min (3~5℉/min). Manual Press:3~6℃ /min (5~10℉/min)2. Curing Temperature & Time: >50min at more than 170℃ (338℉) [Material Temperature]
3. Full Pressure: ≥280psi (20Kgf)
4. Vacuuming should be continued until over 140℃ (284℉) [Material Temperature]
5. Cold Press condition: Keep Plate @ Room Temperature by water, Pressure:100psi, Keep Time: 60minutes
Typical Drilling Parameters (φ0.3-1.0 mm)
Desmearing Process
Standard FR4 Desmear Process.