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: Microwave PCB Boards Built On RO4350B 10 mil With
Immersion Gold
(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 high frequency PCB built on RO4350B
10 mil substrate for the application of antenna. It's a 2 layer RF
PCB board at 0.3 mm thick. It's immersion gold finish without
solder mask. It's fabricated per IPC 6012 Class 2 using supplied
Gerber data. Each 50 boards are packed for shipment.
Features and benefits
The dielectric constant (DK) is low and stable, so the signal
transmission is good without delay.
Good high temperature and low temperature resistance.(-192℃-260℃)
Heat resistance, chemical resistance, impact strength and peeling
strength are good.
SMT process is resistant to reflow soldering, resistant to rework
due to gold pads.
Delivery on time. Keeping 98% on-time-delivery rate.
Whole fabrication process are totally controlled.
No MOQ, low cost for prototypes and samples.
UL conformed
Customer complaint rate: <1%
Application
Transmitter, Variocoupler, Digital transmitter, 3G antenna
Parameter and data sheet
| PCB SIZE | 10 x 37mm=1up |
| BOARD TYPE | Double sided PCB |
| Number of Layers | 2 layers |
| Surface Mount Components | YES |
| Through Hole Components | NO |
| LAYER STACKUP | copper ------- 35um(1 oz)+plate TOP layer |
| RO4350B 0.254mm |
| copper ------- 35um(1oz) + plate BOT Layer |
| TECHNOLOGY | |
| Minimum Trace and Space: | 8.8 mil / 10.5mil |
| Minimum / Maximum Holes: | no |
| Number of Different Holes: | no |
| Number of Drill Holes: | no |
| Number of Milled Slots: | 0 |
| Number of Internal Cutouts: | 0 |
| Impedance Control: | no |
| Number of Gold finger: | 0 |
| BOARD MATERIAL | |
| Glass Epoxy: | RO4350B Tg280℃, er<3.48, Rogers Corp. |
| Final foil external: | 1.5 oz |
| Final foil internal: | N/A |
| Final height of PCB: | 0.3 mm ±0.1 |
| PLATING AND COATING | |
| Surface Finish | Immersion gold, 87% |
| 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 | NO |
| 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.
