Classify of FR4 Circuits

Introduction to FR4 PCB Types

The most popular type of PCB is the Rigid FR4 PCB, which can be categorized into three types based on the layer counts.

Single Layer PCB

Firstly, it is the single-layer PCB, where circuits are laid out on one side, and the components are also assembled on the same side. Because circuits only appear on one side, this kind of PCB board is called a single-layer PCB. Single-layer PCBs are usually manufactured with simple technology and at low cost, making them suitable for simple electronics devices or for testing prototypes. Sometimes, single-sided PCBs can have two sides of soldermask; the soldermask on the side without conductive lines is only to protect the laminate.

Double Layer PCB

Secondly, it is the double-layer PCB, an extension of the single-layer PCB. Double-layer PCBs replace single-sided PCBs when single-sided PCBs cannot meet the needs of electronic products. Double-sided PCBs have copper and circuits on both sides, which can be connected by plated through holes. Double-layer PCBs are also manufactured with simple technology and at low cost. The line and space are wide, and the via holes are normally bigger than 7.9mil, as there is no need to use high tech, which would add to the cost. Double-sided PCBs are also used for simple electronics devices or for testing prototypes.

Multilayer PCB

Thirdly, it is the multilayer PCB, which contains more than three layers of circuits. Insulating materials such as prepreg are used between layers to adhere to and insulate each layer. Multilayer circuit boards are the future direction of electronic products, offering high speed, multi-functionality, large capacity, and high power. For PCBs with more than 12 layers, manufacturing becomes challenging because the board thickness increases, and if there are small diameter holes, the copper plating for hole walls will be difficult. Moreover, if the line and space are less than 4mil, it will be harder during the etching process for the outer layer.

SysPCB Services

SysPCB can meet all your PCB manufacturing needs, from single-sided to complex multi-layered PCBs and everything in between. Our stringent quality standards are maintained by our trained staff, ensuring traceability of PCBs throughout the production process.

Our Services Include

1. Board Manufacturing:

We provide top-notch PCB manufacturing services.

2. Sourcing Components:

We source components both domestically and internationally.

3. Prototype Fabrication and Assembly:

We fabricate and assemble prototypes and send them to you for testing before full production, making your electrical business more convenient.

4. Circuit Board Assembly:

We offer machine soldered assembly of circuit boards with all on-board components.

5. Quality Control:

We perform visual inspection and functional testing for every detail of quality control.