4 Layer High Frequency PCB Built on RO4350b with Blind Via and Immersion Gold

Brief Introduction
Just as its name implies, high frequency is that the frequency is relatively high, generally refers
to the frequency of >=300 MHz (i.e. wave length <=1m), that is, the usual radio frequency band.
The electromagnetic wave of frequency >=1GHz is called microwave.
Typical frequencies for wireless applications:
* Current mobile: 0.9GHz - 2GHz
* 3G systems: 2.5GHz
* Bluetooth: 2.5GHz
* GPS: 12.6GHz
* LMDS: 24GHz and 40GHz
* Automotive: 77GHz
Market: RFID, Wireless communications, base station and antenna, amplifier, military products,
consumer electronics.  
High frequency printed circuit board or microwave PCB refers to the printed circuit board made
on the high frequency (microwave) substrate copper clad plate. The common types are: Double
-sided board, multilayer board and mixed structure.
Mixed structure includes high performance special substrate, PP sheet + ordinary performance
board and PP sheet mixed pressing board; high frequency substrate + ordinary FR4 substrate;
high frequency substrate + metal base etc.


PCB Case: 4 Layer High Frequency PCB Built On RO4350B
With Blind Via and Immersion Gold
(PCB's are custom-made products, the picture and parameters shown are just for reference)


General Description    
This is a type of 4-layer HDI high frequency PCB circuit board built on RO4350B with RO4450B
prepreg for the application of radar RF board. It's a multilayer layer RF PCB board at 1.0 mm
thick with immersion gold finish and solder mask and silkscreen. This board contains blind via
from top layer to inner 1, top layer to inner 3.  Since it's asymmetric buildup, 1.2% warpage is
allowed. It's fabricated per IPC 6012 Class 2 using supplied Gerber data. Each 20 boards
are packed for shipment. 

Features and benefits
The temperature coefficient of dielectric constant is among the lowest of any circuit board material,
making it ideal for temperature sensitive applications.
Reducing signal loss in high frequency application meets the development needs of communication
technology.
Excellent high frequency performance due to low dielectric tolerance and loss.
Gold has high solderability, no stressing of circuit boards and less contamination of PCB surface.
Engineering design prevents problems from occurring in pre-production. 
100% tests inclusive of electrical test and AOI inspection.
Fast and flexible to save the time of production from prototype to standard production
Great customer service
UL recognized and RoHS Directive-compliant


Application
RF module, Power splitter, Low Noise Block, 3G antenna

Parameter and data sheet

Why choose us? 
1) Focus on your core competencies: We've deeply known it is full of fierce competition for our
customers in the market. You can focus on such important competencies as research and
development, sales and marketing based on our professional performance and skilled services
that exceeding your expectation.

2) Cutting-edge technology: it is rational for a small and medium-sized customer to hanker after
the latest equipment and manufacturing expertise for its PCBs. By the partnerships with Bicheng
PCB, you gain access to reach your expectation with our 3 factory bases with over 26,000 square
meters.

3) Save the cost of production: Production cost is one of the key points of our customers' product
competitiveness. Bicheng PCB have been striving to reduce its manufacturing cost from equipment
introduce, worker training and technology improvement to increase their profitability. Customers are
satisfied with our cost savings but without quality loss.

4) Avoid hassle: It's an upset matter when quality problem hassling you. Bicheng engineering design
prevents problem from occurring in pre-production. You will not get headache with Bicheng prototypes,
small orders and volume production. Our rate of customer complaint is less than 1% and will be solved
satisfactory.

5) Save time: Market requires the products updating quickly. Bicheng PCB always works fast and
flexible to save the time of production from prototype to standard production,quick turn-around or
scheduled deliveries.

6) An excellent team: Bicheng is trustworthy partner with passion, discipline, responsibility and
honesty. We have a team of experienced sales persons and skilled customer services. Do not
change your supplier. If change is must, Bicheng is the right one for you.

Variety of PCBs

V-cut depth tester