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: Double Sided RF PCB Made On 30 mil RO4350B
With HASL Lead Free
(Printed circuit boards are custom-made products, the picture and parameters shown are just for
reference)
General description
This is a type of double sided PCB built on high frequency material with Tg 280°C for the application
of Wireless Router. It's 0.80 mm thick, white silkscreen over green solder mask on top layer. No solder
mask on bottom layer and HASL covering entire bottom side. A cutout proceeded in the centre of
board. The base material is used from RogersCorp, 30mil (0.762mm) RO4350B, entire board
supplying single up. They're fabricated per IPC 6012 Class 2 using supplied Gerber data. Each
25 boards are packed for shipment.
Features and benefits
The dielectric constant (DK) is low and stable, so the signal transmission is good without delay;
Delamination of copper foil will not be caused by the change of cold and heat due to the consistency
with the thermal expansion coefficient of copper foil;
Heat resistance, chemical resistance, impact strength and peeling strength are good;
Engineering design prevents problems from occurring in pre-production;
Powerful PCB capabilities support your research and development, sales and marketing;
Quick CADCAM checking and free PCB quotation;
RoHS materials;
Eligible products rate of first production: >95%
Application
TV antenna, Interference filter, Tower-mounted booster, Combiner
Parameter and data sheet
| PCB SIZE |
90 x 45mm=1PCS |
| BOARD TYPE |
Double sided PCB |
| Number of Layers |
2 layers |
| Surface Mount Components |
YES |
| Through Hole Components |
YES |
| LAYER STACKUP |
copper ------- 35um(1 oz)+plate TOP layer |
| RO4350B 0.762mm |
| copper ------- 35um(1oz) + plate BOT Layer |
| TECHNOLOGY |
|
| Minimum Trace and Space: |
4 mil / 5 mil |
| Minimum / Maximum Holes: |
0.4 mm / 5.5 mm |
| Number of Different Holes: |
9 |
| Number of Drill Holes: |
21 |
| Number of Milled Slots: |
1 |
| Number of Internal Cutouts: |
1 |
| Impedance Control: |
no |
| Number of Gold finger: |
0 |
| BOARD MATERIAL |
|
| Glass Epoxy: |
RO4350B Tg280ºC, er<3.48, Rogers Corp. |
| Final foil external: |
1.5 oz |
| Final foil internal: |
N/A |
| Final height of PCB: |
0.8 mm ±10% |
| PLATING AND COATING |
|
| Surface Finish |
HASL Lead free |
| Solder Mask Apply To: |
TOP, 12micron Minimum |
| Solder Mask Color: |
Green, PSR-2000GT600D, Taiyo Supplied. |
| Solder Mask Type: |
LPSM |
| CONTOUR/CUTTING |
Routing |
| MARKING |
|
| Side of Component Legend |
TOP |
| Colour of Component Legend |
White, IJR-4000 MW300, Taiyo brand |
| Manufacturer Name or Logo: |
Marked on the board in a conductor and leged FREE
AREA |
| 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. |
Quality Policy
Bicheng has developed series of management procedures and approaches to assure that PCBs
are in compliance with the customers' requirements, inclusive of selection of the vendors, work in
progress (WIP) inspection, outgoing delivery inspection and customer service etc.
Evaluation and Audit of Suppliers
Suppliers have to be evaluated by Bicheng. In addition, Bicheng will appraise and rank suppliers
every year to guarantee the materials supplied are meeting Bicheng's requirements. Furthermore,
Bicheng continuously develop suppliers and supervise them to improve their quality and environment
management basing on the systems of ISO9001 & ISO14001.
Contract Evaluation
Bicheng shall review and verify customer's requirements to make sure that we have the capability
to satisfy customers' requirements including specifications, delivery and other demands prior to
accepting an order.
Making, audit and control of manufacturing data
When customers' design data and specifications are provided to our market department, Bicheng
has to verify all the requirements. Then, convert the design data into manufacturing data by CAM.
Finally, a manufacturing instruction (MI) is generated according to the real manufacturing process
and technologies for manufacturing department as the basis for actual fabrication. MI must be
reviewed by independent engineers and QA engineers before issue.
Incoming Material Quality Control
All materials have to be inspected before warehousing. We established a series of strict inspection
procedure and instruction to control the incoming materials. Furthermore, various precise inspecting
instruments and apparatus guarantee the capability to judge the material good or not. We issue
material with first in first out principle, and give out "alarm" for the material that will reach the shelf life
to ensure the materials are used up before expiry.
Control of Production Process
Right manufacturing instruction (MI), comprehensive equipment management and maintenance and
process control, strict WIP inspection and monitoring as well as working instruction, all those make
the whole fabrication process totally controlled.
Final Control and Inspection
All PCBs have to be gone through the open and short test as well as visual inspection after passed
the specified physical tests. We own various advanced test equipment including customized, probe
flying test machines to guarantee that each PCB is 100% tested.
Product Delivery Audit
We set up a dedicated FQA department to inspect the PCB products according to the customer's
specifications and requirements by sampling. Qualified PCBs are going to be packed.
FQA also has to carry out a 100% audit of the warehouse packing and shipping products, including
product number, customer number, product quantity, shipping address and so on prior to shipment.
Customer Service
We sets up a professional customer service team to proactively communicate with customers and
timely deal with the customers' feedbacks. We highly focus on customers' needs and to understand
customers' demands, timely to adjust the policy of customer service and PCB product requirements.
Variety of PCBs
Automatic silkscreen machine
Audited Supplier 
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