PCB หลายชั้น

The Definition of Multilayer PCB

Compared with double-sided PCB or a 2-layer PCB board, Multi-Layer or Multilayer Printed Circuit Boards (พีซีบี), or Multilayer Boards (MLBs) must have a minimum of 3 conductive layers of conductive material or copper layer. All the layers are interconnected with copper plated holes, including NC vias and laser micro-vias either in plated through, or in buried and blind.

The Benefit of Multilayer PCB

Multilayer PCB can support a high level of circuit complexity because they consist of three or more copper layers laminated together.

Compact Size: Multilayer PCB reduces the overall size of electronic devices by combining multiple board functions into a single compact board.

Increased Component Density: With internal conductive layers and interlayer vias, multilayer PCB allows more components per unit area, enabling complex circuits to be realized in limited space.

Higher Reliability: Stronger bonds between laminated layers in multilayer PCB provides better resistance to temperature fluctuations, vibration, humidity and mechanical stress.

Improved Electrical Performance: Multilayer PCB provide dedicated signal, power, and ground planes for enhanced noise isolation, controlled impedance routing, and reduced EMI.

Enhanced Heat Dissipation: The planar layers in multilayer PCB can be patterned to efficiently direct heat away from critical areas for improved heat dissipation.

Easy Assembly / Testing: Integrating several simpler boards into a single multilayer PCB simplifies the assembly and testing process.

Design Flexibility: multilayer PCB allows for easier last-minute modifications by rewiring in the inner layers, providing greater flexibility than single or double-layer boards.

The Capability Overview of Multilayer PCB