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|Base Material:||RO4350B+FR-4||Layer Count:||6 Layers|
|PCB Thickness:||1.8mm||PCB Size:||100mm X 120mm = 1 Type = 1 Piece|
|Copper Weight:||1oz||Surface Finish:||Immersion Gold|
Blind Via Mixed Signal PCB,
6 Layer Mixed Signal PCB,
Blind Via PCB 6 Layer
6 Layer Mixed PCB On 20mil 0.508mm RO4350B and FR-4 with Blind Via for Digital Satellite Receiver
Today’s topic is 6-layer hybrid PCB on 20mil RO4350B and FR-4. We’ll see 2 boards in the article.
The first board is used in satellite receiver. There’s one RO4350B core on top layer. See the stack-up below. The structure is a little bit complex due to 3 types of blind vias. It's 1.71 mm thick, white silkscreen over green solder mask on both sides and immersion gold is plated on pads and tracks. Entire board is supplied 1 board up. They're fabricated per IPC 6012 Class 2 using supplied Gerber data. Each 25 boards are packed for shipment.
Following enlarged picture is viewed from side.
The second one is used in signal booster. It used two cores of 20mil RO4350B on top side and bottom side. See the stack-up below.
The specifications are as follows:
|Base material:||RO4350B 20mil + FR4|
|Layer count:||6 layers|
|Type:||Blind via L1-L2, L5-L6|
|Format:||100mm x 120mm = 1 type = 1 piece|
|Surface finish:||Immersion gold|
|Copper weight:||Outer layer 35 μm| Inner layer 35 μm|
|Solder mask | Legend:||Green | White|
|Final PCB height:||1.8 mm|
|Standard:||IPC 6012 Class 2|
|Packing:||20 panels are packed for shipment.|
|Lead time:||20 working days|
|Shelf life:||6 months|
The applications of RO4350B hybrid PCB are wide. For example, LNA, radar data acquisition converter, spread spectrum, 4G antenna, transmitter, radar data acquisition converter, RF switches and splitter module etc.
The advantages of RO4350B hybrid PCBs are listed as below,
1) RO4350B exhibits a stable dielectric constant over a broad frequency range;
2) Signal integrity performance improved over the stack-ups with all FR4 board;
3) Cost reduced over stack-ups with all low loss material;
4) Strong PCB capability with 8000 types of PCB per month;
5) Qualified ISO9001, ISO14001, IATF16949 and UL certified manufacturing factory;
6) No MOQ, low cost for prototypes and small runs quantity;
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.
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.
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.