Shenzhen Bicheng Electronics Technology Co., Ltd Company Logo Shenzhen Bicheng Electronics Technology Co., Ltd
5 1

4 Layer High Frequency PCB Built On 2 Cores of 20mil RO4350B with Back Drill for GPS Tracker

Contact Now* Send an Inquiry to this supplier.
Start Order * Name your price

Contact us

Shenzhen Bicheng Electronics Technology Co., Ltd

Contact name
Kevin Liao

Quick Information

  • Brand Name: Bicheng
  • Place of Origin: China
  • Model Number : BIC-0065-V1.12
  • Base Material : RO4350B
  • Board Thickness : 1.5mm
  • Copper Thickness : 1oz
  • Min. Hole Size : 0.25mm
  • Min. Line Spacing : 5mil
  • Min. Line Width : 4mil
  • Number of Layers : 4-Layer
  • Surface Finishing : Immersiongold
  • Type : Blind via L1-L2
  • Solder mask | Legend: : N/A


4 Layer High Frequency PCB Built On 2 Cores of 20mil RO4350B with Back Drill for GPS Tracker

(Printed circuit boards are custom-made products, the picture and parameters shown are just for reference)


Hello Everyone,

Warm greetings!

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;



Multiplexer, Video transmission gear, Low noise block, Power divider


Parameter and data sheet

PCB SIZE 70mm x 125mm = 1 piece
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
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
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%
Surface Finish Immersion gold
Solder Mask Apply To:  N/A
Solder Mask Color:  N/A
Solder Mask Type: N/A
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.
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.


  • UL : E251497


  • Delivery Port : Hongkong

Packaging & Delivery

  • Packing :Vacuum
  • Packaging Size : 36 x 36 x 25  Centimeters
  • Package Weight : 10  Kilograms
  • Delivery Lead Time : 15 working days
  • Supply Ability : 45000 pieces per month

Product Image

  • 4 Layer High Frequency PCB Built On 2 Cores of 20mil RO4350B with Back Drill for GPS Tracker image

Send an Inquiry to this supplier

Send an Inquiry to this supplier
* From
  To Kevin Liao
Shenzhen Bicheng Electronics Technology Co., Ltd
* Buying Product
- Please enter your specific buying item.
e.g. 42 inch LCD TV, leather executive chair
Category : Multilayer PCB
* Message

Use English only Max. 2000 characters. (Min. 20)

Send does not guarantee the validity of product information or the credentials of sellers.
Chat Online with$Shenzhen Bicheng Electronics Technology Co., Ltd.
Click the "S Chat" Icon on the right-hand to contact Shenzhen Bicheng Electronics Technology Co., Ltd.
Note: Please ensure you have installed Skype program in your computer.
           If you don't have yet, click here to download Skype.

Close Window