What is Cold Solder? Cold solder, also known as a cold solder joint, is a defective solder connection that occurs when the solder fails to melt and flow properly during the soldering process. This results in a weak, high-resistance connection that may not provide a reliable electrical path between components. Characteristics of Cold Solder Joints […]
What Causes Lifted Pads on PCBs? There are several potential causes of lifted pads on printed circuit boards: Incorrect Hole Drilling One common cause is incorrect hole drilling during PCB fabrication. If the holes for through-hole components or vias are drilled off-center from the pads, there will be less bonding area between the pad and […]
What is Solder? Solder is a metal alloy that is used to join two or more metal surfaces together. It is commonly used in electronic circuits to connect components to printed circuit boards (PCBs) or to join wires together. Solder is typically made of a combination of tin and lead, although lead-free solder is becoming […]
What is Via plating? Via plating is the process of depositing a layer of conductive material onto the walls of vias in a PCB. The purpose of via plating is to create an electrical connection between the different layers of the PCB. Without via plating, the vias would be non-conductive, and the PCB would not […]
How Mid-Chip Solder Balls Work Mid-chip solder balls are typically arranged in an array pattern on the active side of the semiconductor chip. The solder balls are deposited onto the chip’s bond pads, which are the metal connection points that link the chip’s circuitry to the outside world. The bond pads have a metallization stack […]
What are Gold Fingers Made Of? Gold fingers are typically made of copper, which is then plated with a layer of nickel and a final layer of gold. The copper provides excellent electrical conductivity, while the nickel layer acts as a barrier to prevent the copper from diffusing into the gold layer. The gold plating […]
Common BGA Soldering Errors Several factors can contribute to BGA soldering defects, such as improper solder paste application, incorrect reflow profile, poor package handling, and PCB design issues. The following are some of the most common BGA soldering errors: Bridging Open joints Head-in-pillow (HIP) Solder Voids Misalignment Tombstoning Solder Beading Insufficient or excessive solder Lifted […]
Introduction Printed Circuit Board (PCB) soldering is a crucial process in the manufacturing of electronic devices. It involves the attachment of electronic components to the PCB using solder, a metal alloy that melts at a relatively low temperature. However, the soldering process is not always perfect, and various defects can occur, leading to malfunctions or […]
Visual Inspection Visual inspection is the most basic and straightforward method of testing PCBs. It involves examining the board with the naked eye or using magnifying tools to identify any visible defects or irregularities. Some common issues that can be detected through visual inspection include: Incorrect component placement Solder bridges or shorts Insufficient or excessive […]
Introduction to Non-Plated Through Holes Non-Plated Through Holes (NPTH) are a type of hole found in printed circuit boards (PCBs) that are not plated with a conductive material, such as copper. These holes are used for various purposes, including mounting components, providing mechanical support, and allowing for the passage of non-electrical elements like air or […]
