mekcotechnology

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Flexible Printed Circuit Board (FPC) is a highly reliable, excellent flexible printed circuit board made of polyimide or polyester film.FPC is also known as flexible circuit boards, flexible circuit boards, which are favored for their lightweight, thin thickness, free bending and folding, and other excellent features.

[mekcotechnology]

Explore the benefits and applications of flexible PCBs

Flexible PCB is a highly reliable, excellent flexible printed circuit board made of polyimide or polyester film. Abbreviated as Flexible PCB or FPC, it is characterized by high wiring density, light weight, and thin thickness, and is mainly used in cell phones, notebook computers, PDAs, digital cameras, LCMs, and many other products.

Flexible PCB production process

Surface treatment: gold immersion, anti-oxidation, gold plating, tin spraying Shape processing: manual shape, CNC (numerical control machine) cutting, laser cutting Substrate copper thickness: 1/3 ounce, 1/2 ounce, 1 ounce, 2 ounces, 4 ounces Line width and spacing: the narrowest 0.065mm

Flexible PCB Component Materials

Insulating Film The insulating film forms the base layer of the circuit and the adhesive bonds the copper foil to the insulating layer. In multilayer designs, it is then bonded to the inner layer. They are also used as protective coverings to insulate the circuit from dust and moisture and to reduce stress during flexing, with the copper foil forming the conductive layer. In some flexible circuits, rigid members formed from aluminum or stainless steel are used, which provide dimensional stability, physical support for component and wire placement, and stress relief. An adhesive bonds the rigid member to the flexible circuit. Another material that is sometimes used in flexible circuits is the adhesive laminate, which is formed by coating both sides of an insulating film with an adhesive. Adhesive laminates provide environmental protection and electrical insulation, as well as the ability to eliminate one layer of film, and the ability to bond multiple layers with fewer layers. Conductors Suitable for use in flexible circuits, copper foils can be electrodeposited (ED) or plated. Electrodeposited copper foils have a glossy surface on one side, while the other side is processed with a dull, non-glossy surface. It is a flexible material that can be made in many thicknesses and widths, and the non-glossy side of ED copper foil is often specially treated to improve its bonding ability. Wrought copper foils are characterized by hardness and smoothness in addition to flexibility, making them suitable for applications requiring dynamic flexing. Adhesives In addition to bonding insulating films to electrically conductive materials, adhesives can also be used as a cover layer, as a protective coating, and as a covering coating. The main difference between the two is the application method used, with the overlay bonding covering the insulating film in order to form circuits in a stacked configuration. The screen printing technique is used for the overlay coating of the adhesive. Not all overlay constructions contain an adhesive; overlay without adhesive forms thinner circuits and greater flexibility. It has better thermal conductivity compared to stacked layer constructions that utilize an adhesive base. Due to the thin structural characteristics of the adhesive-free flexible circuits and the improved thermal conductivity due to the elimination of the thermal resistance of the adhesive, it can be used in operating environments where adhesive-based stacked-layer construction flexible circuits cannot be used.

Flexible PCB characteristics

Short: short assembly time, all lines are configured. Eliminate redundant wiring connection work Small: smaller than PCB, can effectively reduce the size of the product, increase the convenience of carrying on the Light: lighter than PCB (hardboard), can reduce the weight of the final product. Thin: Thinner than PCB, flexible PCB can improve flexibility. Enhancement of three-dimensional assembly in limited space.

Advantages and disadvantages of flexible PCB

Advantages of multi-layer circuit boards: high assembly density, small size, light weight, because of high-density assembly, components (including parts) between the connecting line is reduced, thus increasing the reliability; can increase the wiring layer, and then increase the flexibility of the design; can also constitute the impedance of the circuit, can be formed with a certain high-speed transmission circuits can be set up to set up circuits, electromagnetic shielding layer, but also can be installed to meet the metal core layer of the special thermal insulation and other functions, and the demand; easy to install, high reliability. With the demand; easy to install, high reliability. Disadvantages of multilayer PCB board (unqualified): high cost, long cycle time; the need for high reliability testing methods. Multilayer printed circuit is the product of electronic technology, multi-functional, high speed, small volume and large capacity direction. With the development of electronic technology, especially large-scale and ultra-large-scale integrated circuits are widely used, multilayer printed circuits with high density of fast, high precision, high number of changes in the direction of fine grain.

Flexible PCBs are used in a large proportion of smartphones to meet the needs of cell phone screens, batteries, camera modules. 5G era smartphone multifunctionality modules appear, RF modules, folding screens, miniaturized models, are inseparable from the flexible PCB connection. Flexible circuit industry is in a small but rapid development, in the coming years, smaller, more complex and assembly cost of flexible circuits will require more innovative methods of assembly, and the need to increase the hybrid flexible circuits.