Application des PCB multicouches dans la fabrication électronique

/dans /par

Les équipements électroniques sont visibles partout dans nos vies, et certains produits électroniques sont devenus nos fournitures indispensables. Nous dépendons d'eux, tandis que l'équipement électronique dépend du circuit imprimé. Le PCB est désormais le composant principal de la plupart des produits, et les fonctions de base sont déterminées par la combinaison de composants et de mécanismes de câblage.

Le PCB est divisé selon le niveau, qui peut être divisé en: circuit imprimé monocouche, circuit imprimé double couche, et circuit imprimé multicouche. Ce dont nous voulons discuter aujourd'hui, c'est du circuit imprimé multicouche.. Le circuit imprimé simple et fonctionnel utilise principalement un PCB monocouche, mais des produits électroniques plus compliqués, comme la carte mère de l'ordinateur, se composent de plusieurs couches. Avec la complexité croissante des produits électroniques modernes, ces PCB multicouches sont plus populaires que jamais, et la technologie de fabrication a considérablement réduit leur taille.

Qu'est-ce qu'un PCB multicouche

Le PCB multicouche est une carte de circuit imprimé composée d'une couche conductrice multicouche et d'une couche isolante. Ce circuit imprimé est principalement utilisé dans les produits électroniques haut de gamme, comme la communication sans fil, ordinateur, automatisation industrielle, équipement médical et autres domaines.

Le PCB multicouche est composé de plusieurs couches conductrices, qui sont séparés les uns des autres par la couche isolante. Sur chaque couche conductrice, il y a une fine couche de feuille de cuivre, qui forme des graphiques de circuits par gravure chimique ou perçage mécanique. Les couches conductrices adjacentes sont connectées à travers le trou.

Par rapport aux panneaux simples ou doubles, le PCB multicouche a une densité de circuit plus élevée, meilleure compatibilité électromagnétique, bruit de circuit réduit et meilleures performances de dissipation thermique. Son processus de production est relativement compliqué, et plusieurs étapes telles que la couverture d'une feuille de cuivre, gravure chimique, forage, impression, un placage de cuivre et d'autres étapes sont nécessaires. Ces étapes nécessitent un niveau technique élevé et un contrôle strict du processus pour garantir la qualité et la stabilité du produit final..

La conception et la fabrication de PCB multicouches nécessitent de nombreux facteurs, comme l'apparence, taille, nombre de couches, comment placer les composants, comment disposer les fils, forage, coussinets, etc.. La clé est d'optimiser le câblage interne pour améliorer les performances et la fiabilité du circuit.

Avantages des PCB multicouches

D'un point de vue technique, PCB multicouches présentent plusieurs avantages en matière de conception. Ces avantages que présentent les PCB multicouches incluent:

• Petite taille: L'un des avantages les plus importants et les plus appréciés de l'utilisation de PCB multicouches réside dans leur taille.. En raison de leur conception en couches, les PCB multicouches sont intrinsèquement plus petits que les autres PCB ayant des fonctionnalités similaires. Cela présente un avantage majeur pour l’électronique moderne, car la tendance actuelle est à la réduction, des gadgets plus compacts mais plus puissants comme les smartphones, ordinateurs portables, tablettes et appareils portables.

• Construction légère: Des PCB plus petits entraînent moins de poids, especially as the multiple connectors required to interlink separate single and double-layered PCBs are eliminated in favor of a multilayered design. This, again, is beneficial for modern electronics, which are geared more toward mobility.

• High-Quality: Due to the amount of work and planning that must go into the creation of multilayer PCBs, these types of PCBs tend to be better in quality than single and double-layer PCBs. They also tend to be more reliable as a result.

• Increased Durability: Multilayer PCBs tend to be durable by their nature. Not only do these multilayer PCBs have to withstand their own weight, but they must also be able to handle the heat and pressure used to bind them together. On top of these factors, multilayer PCBs use multiple layers of insulation between circuit layers, binding it all together with prepreg bonding agent and protective materials.

• Enhanced Flexibility: Though this does not apply to all PCB multicouche assemblies, some do use flexible construction techniques, resulting in a flexible multilayer PCB. This can be a highly desirable trait for applications where mild bending and flexing may occur on a semi-regular basis. Encore, this does not apply to all multilayer PCBs, and the more layers incorporated into a carte PCB flexible, the less flexible the PCB becomes.

• More Powerful: Multilayer PCBs are extremely high-density assemblies, incorporating multiple layers into a single PCB. These close-quarters enable boards to be more connective, and their innate electrical properties allow them to achieve greater capacity and speed despite their smaller size.

• Single Connection Point: Multilayer PCBs are designed to work as a singular unit, rather than in tandem with other PCB components. Par conséquent, they have a single connection point, rather than the multiple connection points required to use multiple single layer PCBs. This proves to be a benefit in electronic product design as well since they only need to include a single connection point in the final product. This is particularly beneficial for small electronics and gadgets designed to minimize size and weight.

These benefits make multilayer PCBs highly useful in a variety of applications, particularly mobile devices and high-functioning electronics. In turn, with so many industries turning to mobile solutions, multilayer PCBs are finding a place in an increasing number of industry-specific applications.

Advantages of Multilayer PCBs over Single Layer Alternatives

When compared to single layer alternatives, the advantages of multilayer PCBs become even more pronounced. Some of the key improvements multilayer PCBs offer include the following:

• Higher Assembly Density: While single layer PCBs’ density is limited by their surface area, multilayer PCBs multiply their density through layering. This increased density allows greater functionality, improving capacity and speed despite the smaller PCB size.

• Smaller Size: Overall, multilayer PCBs are smaller in size than single layer PCBs. While single layer PCBs must increase the surface area of the circuit by increasing size, multilayer PCBs increase surface area through the addition of layers, decreasing overall size. This allows for higher-capacity multilayer PCBs to be used in smaller devices, while high-capacity single layer PCBs must be installed into larger products.

• Lighter Weight: The integration of components in a multilayer PCB means less of a need for connectors and other components, resulting in a lightweight solution for complex electrical applications. Multilayer PCBs can accomplish the same amount of work as multiple single-layer PCBs, but does so at a smaller size and with fewer connecting components, reducing weight. This is an essential consideration for smaller electronics where weight is a concern.

• Enhanced Design Functionality: Overall, multilayer PCBs are capable of being more than the average single layer PCB. With more incorporation of controlled impedance features, greater EMI shielding and overall improved design quality, multilayer PCBs can accomplish more despite their smaller size and lesser weight.

Application of Multilayer PCB

Multi-layer PCB is widely used in various high-end electronic products, including but not limited to the following fields:

1. Communication equipment: Multi-layer PCB plays a key role in communication devices such as mobile phones, routeurs, communication par satellite, etc., and realizes high-speed data transmission, signal processing and power management functions.

2. Computer hardware: Multi-layer PCB is widely used in hardware such as computer motherboards, cartes graphiques, and memory strips. It provides high -density and high reliability circuit wiring to ensure the stable operation of the computer system.

3. Automatisation industrielle: Multi-layer PCB is widely used in industrial automation equipment, such as programmable controllers, capteurs, motors controllers, etc.. Its high reliability and durability meet the needs of industrial automation equipment.

4. Matériel médical: Multi-layer PCB is also widely used in medical equipment, such as monitor, ECG, ultrasound equipment, etc., its miniaturization, high density and reliability provide strong support for the performance of medical equipment.

5. Aérospatial: The application of multi-layer PCB in the field of aerospace is very important because this field requires high reliability and durability electronic equipment. The characteristics of high-density wiring, electromagnetic compatibility and heat dissipation performance of multi -layer PCB meet the needs of the aerospace field.

6. Car Electronics: Multi-layer PCB is also widely used in automotive electronics, such as engine control modules, airbag control modules, etc.. Its high reliability and durability can ensure stable operation in the harsh working environment of the car.

Get a Manufacturer For Your Multilayer PCB

Lst is a PCB personnalisé SORUTIONS Provider, Serving Companies the World in PCB ManuFacturing and Assembly Services. We Help Companies Sourcing To Testing, ALL The Who Remaining Compliant with IPC Class 3, Rohs and ISO9001: 2008 Standards.

We can design a variety of complex multi -layer circuit boards for you. We have an experienced production technology team to track the processing of multi -layer circuit boards throughout the process. Any of your needs, LST can be met.