Introduction to PCB Inner Layers Printed Circuit Boards (PCBs) are essential components in modern electronics. They provide a platform for mounting and interconnecting electronic components to create functional circuits. While the outer layers of a PCB are visible and often feature component footprints and labels, the inner layers play a crucial role in the overall […]
How AOI Works AOI systems typically consist of the following components: High-resolution cameras: AOI machines are equipped with one or more high-resolution cameras that capture detailed images of the inspected object from various angles. Lighting system: Proper illumination is essential for accurate image capture. AOI systems employ advanced lighting techniques, such as multi-angle lighting or […]
The Importance of Medical PCBs in the Fight Against COVID-19 Medical PCBs are essential components in various medical devices and equipment, including: Ventilators Patient monitors Diagnostic equipment Imaging devices Wearable medical devices During the COVID-19 pandemic, the demand for these devices skyrocketed as healthcare systems worldwide struggled to cope with the influx of patients. Medical […]
The Importance of PCB Electrical Testing Electrical testing is an essential step in the PCB manufacturing process for several reasons: Quality Assurance: Electrical testing helps identify any defects or issues with the PCB, ensuring that only high-quality boards are delivered to the customer. Functionality Verification: By testing the electrical properties of the PCB, manufacturers can […]
Why Use Blind Vias in PCB Design? There are several reasons why blind vias are used in PCB design: 1. Space Savings One of the main advantages of using blind vias is that they save space on the PCB. Since blind vias do not go all the way through the board, they free up space […]
Definition and Basic Concept Aspect Ratio is expressed as a ratio of two numbers, typically in the format of width:height. For example, a common aspect ratio in photography and digital displays is 16:9, which means that for every 16 units of width, there are 9 units of height. This ratio remains constant regardless of the […]
Introduction to PCB Stackup A printed circuit board (PCB) stackup refers to the arrangement of copper and insulating layers that make up a PCB. The stackup defines the number of layers, their order, and the materials used in the fabrication process. A well-designed PCB stackup ensures proper functionality, signal integrity, and manufacturability of the circuit […]
What Causes Tin Whiskers? Several factors contribute to the growth of tin whiskers: Stress in the Tin Plating Tin plating on electronic components can experience stress due to various reasons, such as: Temperature fluctuations Mechanical stress during manufacturing or handling Residual stress from the plating process When the stress in the tin plating exceeds a […]
What are Microvias? Microvias are small holes drilled in a PCB to make electrical connections between layers. They are typically defined as blind vias (connecting an outer layer to an inner layer) or buried vias (connecting inner layers) with a diameter of 150 μm or less. Some key characteristics of microvias include: Small diameter (typically […]
Understanding the Basics of Solder Flux What is Solder Flux? Solder flux is a chemical compound that is applied to the surfaces being soldered to improve the wetting and bonding characteristics of the solder. It helps to remove oxides, contaminants, and impurities from the metal surfaces, allowing the molten solder to flow smoothly and adhere […]
