Common flexible printed circuit board in the production of four kinds of circuit boards

Flexible printed circuit (FPC) is a kind of high reliability and excellent flexible printed circuit board made of polyimide or polyester film. It has the characteristics of high wiring density, light weight, thin thickness and good flexibility. Today, Xiaobian will introduce you to four common flexible printed circuit board.
1. Single-sided flexible board
Lowest cost. When the electrical performance requirements are not high and single-sided wiring can be used, single-sided flexible board should be used. This most common form has been used commercially, such as printer ink cartridge and computer memory. The single-sided flexible board has a layer of chemically etched conductive pattern, and the conductive pattern layer on the surface of the flexible insulating substrate is rolled copper foil. The insulating substrate used for flexible assembly can be polyimide (Kapton), polyethylene terephthalate (PET), aramid fiber paper (Nomex) and polyvinyl chloride (PVC).
2. Double-sided flexible board
The double-sided flexible board is a conductive pattern formed by etching on both sides of the base film. Metallized holes connect the patterns on both sides of the insulating material to form conductive paths, meeting the flexibility of design and use functions. The film can protect single-sided and double-sided wires and indicate the position of components.
3. Multilayer flexible board
Multi-layer flexible board is to laminate three or more layers of single-sided flexible printed circuit board or double-sided flexible printed circuit board together. Metallized holes are formed by drilling and electroplating, and conductive paths are formed between different layers. In this way, there is no need for complicated welding process. Although the number of conductive layers designed in this flexible type can be unlimited, in order to ensure convenient assembly, the interaction among assembly size, number of layers and flexibility should be considered in layout design.
4. Rigid-flexible combination type
Traditional rigid-flexible board is composed of rigid and flexible substrates selectively laminated together. Compact structure, forming conductive connection with metallized holes. Considering the reliability and price factors, the manufacturer should try to keep as few floors as possible.
HDI rigid-flexible board: HDI rigid-flexible printed circuit board is a high-end printed circuit board product. Its goal is to meet the demand of electronic products towards miniaturization, high frequency, high speed and multifunction. HDI rigid-flexible composite board combines the advantages of popular HDI board and rigid-flexible composite board, promotes the high integration and intelligent development of electronic system design and production, and has been widely used in aerospace, medical equipment, consumer and other high-end electronic products.
These are the four common flexible printed circuit board, and I hope to provide you with some reference!