3-Layer High Frequency PCB Built on 60mil RO4350B and 6.6mil RO4350B with ENIG for Wireless Boosters

(Printed Circuit Boards are custom-made products; the images and parameters shown are for reference only.)

Introduction

Hello Everyone,
Today, we discuss a multilayer high-frequency PCB constructed entirely from high-frequency materials, including prepreg adhesive. For instance, a 4-layer RO4350B PCB consists of two cores of RO4350B substrates. The RO4350B family includes eight core thicknesses, ranging from 4mil (0.101mm) to 60mil (1.524mm).

RO4350B Thickness Options

Thickness (mil)	Thickness (mm)
4mil	0.101mm
6.6mil	0.168mm
10mil	0.254mm
13.3mil	0.338mm
16.6mil	0.422mm
20mil	0.508mm
30mil	0.762mm
60mil	1.524mm

So it’s very interesting that stack-up of 4 layers can be done in many different ways.

This 3-layer high-frequency PCB is built using two cores of RO4350B, with one copper layer etched away, resulting in three functional layers.

Structure and Specifications

The construction comprises one sheet of 60mil RO4350B, 4mil RO4450F prepreg, and a combined 6.6mil RO4350B. The board dimensions are 110mm x 110mm, featuring immersion gold finishes on the pads. Each order includes 20 pieces, designed specifically for wireless booster applications.

Following is the actual value in engineering manufacture.

Features and Benefits

1.Excellent High-Frequency Performance: Achieves low dielectric tolerance and loss.
2.Reduced Signal Loss: Meets the evolving demands of communication technology.
3.Professional Oversight: Experienced engineers verify production files for accuracy.
4.Comprehensive After-Sales Support: One-to-one service to address all inquiries.
5.Certified Quality: Manufactured in a UL, ISO14001, and IATF16949 certified facility.

Applications

Amplifiers
Antenna combiners
Frequency converters
Trunk amplifiers
RF modules
Power splitters
Low Noise Blocks (LNBs)
4G antennas

Parameter and data sheet

Quality Assurance and Management

At Bicheng, we implement a series of management procedures to ensure PCBs meet customer requirements. This includes vendor selection, work-in-progress (WIP) inspections, outgoing delivery checks, and customer service protocols.

Supplier Evaluation

All suppliers are thoroughly evaluated and ranked annually to ensure compliance with Bicheng’s standards. We continuously develop and supervise suppliers to enhance their quality management in accordance with ISO9001 and ISO14001 systems.

Contract Review

Before accepting any order, Bicheng reviews and verifies customer requirements to ensure our capability to fulfill specifications, delivery terms, and other demands.

Manufacturing Data Control

When customer design data is received, we verify all requirements and convert them into manufacturing data using CAM. A manufacturing instruction (MI) is created, which must be approved by independent engineers and QA personnel.

Incoming Material Quality Control

All materials undergo rigorous inspection before being stored. We adhere to strict inspection protocols and utilize precise instruments to verify material quality. We implement a first-in, first-out principle and monitor shelf life to ensure materials are used before expiration.

Production Process Control

We maintain strict control over the manufacturing process through accurate MI, comprehensive equipment management, and thorough WIP inspections.

Final Inspection

All PCBs undergo open and short tests, as well as visual inspections, after passing specified physical tests. We utilize advanced testing equipment, including customized probe flying test machines, to ensure 100% testing of each PCB.

Product Delivery Audit

Our dedicated Final Quality Assurance (FQA) department conducts inspections based on customer specifications. Qualified PCBs are packaged, with a 100% audit of packing and shipping to verify product details prior to shipment.

Customer Service

We have established a proactive customer service team to communicate effectively with clients and address feedback promptly. Our focus is on understanding customer needs and adapting our service policies accordingly.

If you have any questions or need further information, please feel free to contact us. Thank you for reading!