Introduction to Multi-Layer PCBs A Multi-Layer PCB, or Multi-Layer Printed Circuit Board, is a complex type of circuit board that consists of multiple layers of conductive copper foil laminated together with insulating material. These layers are interconnected through a series of drilled holes called vias, which allow electrical signals to pass from one layer to […]
The Importance of Annular Rings in PCB Design Mechanical Stability Annular rings provide mechanical stability to the components mounted on a PCB. They help to distribute the stress and strain caused by the insertion and removal of components, as well as the thermal expansion and contraction during operation. Without adequate annular rings, components may become […]
What is an Acid Trap? An acid trap is a small, intentionally designed feature on a PCB that serves as a reservoir for excess acid during the etching process. It is typically located in areas where traces or copper planes are more likely to trap or hold onto acid, such as in corners, narrow spaces, […]
Understanding the Basics of PCB Bare Boards What is a PCB? A Printed Circuit Board, or PCB, is a board made of non-conductive material, such as fiberglass, with copper traces printed on it to connect the various components in an electronic device. These boards are used in almost all electronic devices, from simple calculators to […]
Understanding PCB Copper Layers What are PCB Copper Layers? PCB copper layers are thin sheets of copper foil laminated onto the surface of a non-conductive substrate, typically made of fiberglass or other materials. These copper layers form the conductive pathways that allow electrical signals to travel between components on the PCB. The number and arrangement […]
What Are High Tg PCBs? A printed circuit board’s glass transition temperature (Tg) is the point at which the board transitions from a rigid, glassy state to a more flexible, rubbery state as temperature increases. Standard FR-4 PCBs made of woven fiberglass cloth with epoxy resin have a Tg around 130-140°C. Above this temperature, the […]
What is a PCB Annular Ring? A PCB annular ring, also known as a pad or land, is a circular copper area surrounding a drilled hole on a printed circuit board (PCB). These rings provide electrical connections between the components mounted on the PCB and the copper traces that carry signals across the board. The […]
What are PCB Drill Sizes? PCB drill sizes refer to the diameter of the holes that are drilled into a printed circuit board. These holes are used to mount components, create vias for electrical connections between layers, and provide mechanical support for the board. The drill sizes are typically expressed in either inches or millimeters, […]
Microvia Definition A microvia is a small, laser-drilled hole that connects the outer layer of a printed circuit board (PCB) to the inner layers. These tiny vias are essential for high-density interconnect (HDI) PCBs, which are used in various electronic devices, such as smartphones, tablets, and laptops. Microvias enable the miniaturization of electronic devices by […]
Understanding PCB Substrates A PCB substrate is the insulating material that forms the base of a printed circuit board. It provides a stable and non-conductive surface for the copper traces and components to be placed on. The substrate also plays a vital role in determining the overall performance and reliability of the PCB. Key Properties […]
