4 Layer High Frequency PCB Built On 2 Cores of 20mil RO4350B with
Back Drill for GPS Tracker
This type of 4 Layer Rogers PCB is built on 2 core of 0.508mm
(20mil) RO4350B for the application of GPS tracker. This board, we
used back drilling technology to achieve the “blind via”. See the
stack-up.
Back drilling can reduce noise interference and improve signal
integrity. Using back drilling successfully reduced the difficulty
of PCB fabrication and avoided the use of buried /blind via
process.
The specifications of the PCB are as follows:
Base material: RO4350B 20 mil + RO4450B 4 mil
Layer count: 4 layers
Type: Mixed multiplier milled separately
Format: 70mm x 125mm = 1 piece
Surface finish: Immersion gold
Copper weight: Outer layer 35 um/ Inner layer 18 um
Solder mask / Legend: Green / white
Final PCB height: 1.42 mm
Standard: IPC 6012 Class 2
Packing: Each 25 panels are packed for shipment.
Lead time: 12 working days
Shelf life: 6 months
Features and benefits
1) Excellent high frequency performance due to low dielectric
tolerance and loss;
2) Low thermal coefficient of dielectric constant;
3) Back drilling reducing noise interference;
4) ISO9001, ISO14001, UL certified manufacturing factory;
5) 30000 square meter month capability;
We can see their applications in multiplexer, video transmission
gear, low noise block, power divider etc.
Parameter and data sheet
| PCB SIZE | 70mm x 125mm = 1 piece |
| BOARD TYPE | Multlayer PCB |
| Number of Layers | 4 Layers |
| Surface Mount Components | YES |
| Through Hole Components | YES |
| LAYER STACKUP | Copper -----Signal 18um(0.5 oz)+plate TOP layer |
| RO4350B 0.508 mm |
| Copper -----Plain 0.018 mm |
| Prepreg RO4450F X 3, 0.305mm |
| Copper ----- Plain 0.018 mm |
| RO4350B 0.508 mm |
| Copper ------- 18um(0.5oz) + plate BOT Layer |
| TECHNOLOGY | |
| Minimum Trace and Space: | 4 mil / 5 mil |
| Minimum / Maximum Holes: | 0.4 mm / 5.6 mm |
| Number of Different Holes: | 12 |
| Number of Drill Holes: | 121 |
| Number of Milled Slots: | 0 |
| Number of Internal Cutouts: | NA |
| Impedance Control: | N/A |
| Number of Gold finger: | N/A |
| BOARD MATERIAL | |
| Base Material: | RO4350B Tg280℃, er<3.48, Rogers Corp. |
| Final foil external: | 1 oz |
| Final foil internal: | 0.5 oz |
| Final height of PCB: | 1.42 mm ±10% |
| PLATING AND COATING | |
| Surface Finish | Immersion gold |
| Solder Mask Apply To: | N/A |
| Solder Mask Color: | N/A |
| Solder Mask Type: | N/A |
| CONTOUR/CUTTING | Routing |
| MARKING | |
| Side of Component Legend | N/A |
| Colour of Component Legend | N/A |
| Manufacturer Name or Logo: | N/A |
| VIA | Plated through hole(PTH), minimum size 0.4mm. |
| FLAMIBILITY RATING | UL 94-V0 Approval MIN. |
| DIMENSION TOLERANCE | |
| Outline dimension: | 0.0059" |
| Board plating: | 0.0029" |
| Drill tolerance: | 0.002" |
| TEST | 100% Electrical Test prior shipment |
| TYPE OF ARTWORK TO BE SUPPLIED | email file, Gerber RS-274-X, PCBDOC etc |
| SERVICE AREA | Worldwide, Globally. |
