With the development of electronic communication technology, the communication frequency is becoming higher and higher, and the high frequency signal transmission, need to use low dielectric constant (Dk), low dielectric loss (Df) but expensive special materials. These materials have cyanate and high frequency materials such as polytetrafluoroethylene / ceramic based materials (PTFE/Ceramic), hydrocarbons / ceramic based materials (Hydra Carbon/Ceramic). Usually these materials are expensive.

Reducing the cost is an important means for customers to improve the competitiveness of products. Therefore, the customers adopt the laminated structure of mixed materials in the design of PCB structure, that is, the necessary signal layer uses high-frequency materials to meet the needs of signal transmission. Other line layers are made of conventional fiberglass epoxy FR-4, which we call a hybrid board.

Available high frequency material (Core)

RO4350B RO4003C

4mil (0.1mm) 8mil (0.203mm)

6.6mil (0.168mm) 12mil (0.3mm)

10mil (0.254mm) 20mil (0.508mm)

13.3mil (0.338mm) 32mil (0.813mm)

20mil (0.508mm) 60mil (1.524mm)

30mil (0.762mm)

60mil (1.524mm)

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

This is a type of hybrid PCB built on RO4350B and FR-4 with 6 layer stackup for the application of radar antenna. On the other hand, it's not just 6 layer board which is directly designed from client. The designer wants a double sided RO4350B circuit board combined with a 4 layer circuit board.The 2 types PCB has it's own drill, so the final PCB becomes a 6 layer PCB with blind via. Afer prcoess of press,it leaves 1.8 mm thick. White silkscreen over green solder mask is printed on board and immersion gold are plated on pads. The base material is used from ITEQ IT-158 and Rogers 10mil RO4350B, entire board supplying single up per panel. They're fabricated per IPC 6012 Class 2 using supplied Gerber data. Each 25 panels are packed for shipment.

SI performance improvement over the stack-ups with all FR4 board;

Cost reduction over stack-ups with all low loss material;

Excellent surface planarity for CSP mounted components to reduce failure rate during assembly and soldering;

High solderability, no stressing of circuit boards and less contamination of PCB surface;

Experienced sales persons and skilled customer services;

No minimum order quantity and low cost sample;

Focus on low to medium volume production;

Quick turnaround prototype;

ISO9001, ISO14001, TS16949, UL Certified;

Splitter, transmitter combiner , radio frequency, Tower Mounted Amplifier

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.

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.

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.

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.

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.

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.

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.

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.

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.

Founded in 2003, Shenzhen Bicheng Electronics Technology Co., Ltd is an established high frequency PCB supplier and exporter in Shenzhen China, severing cellular base station antenna, satellite, high frequency passive components, microstrip line and band line circuit, millimeter wave equipment, radar systems, digital radio frequency antenna and other fields worldwide for 18 years. Our high frequency PCBs are mainly built on 3 high frequency material brands: Rogers Corporation, Taconic and Wangling. Dielectric constant ranges from 2.2 to 10.2 etc.

 

We also have divisions of FR-4 circuit board, flexible circuits and metal core PCBs featured as prototypes, small runs to mass production. We actively research and build such high value added PCB projects as HDI, quick turn, impedance control, heavy copper and backplane board etc. This has made our PCB products generate an effective prolongation and complementation, as well as formation of integrated products line ranging from low-end to high-end.