In flexible PCB and rigid-flex PCB manufacturing, via filling and via plugging are critical processes used to improve soldering reliability, prevent contamination, and meet high-density assembly requirements. Compared to rigid PCBs, flexible PCBs use polyimide substrates, which makes via filling more challenging and requires stricter process control. Let's now explore common via filling and plugging methods for flexible PCBs, their applications, and key manufacturing consider

Electromagnetic interference (EMI) has become a familiar challenge in flexible PCB design—especially as devices get thinner, faster, and more compact. There’s no single “best” way to block EMI, but several practical shielding approaches have proven reliable across consumer electronics, automotive, medical, and aerospace applications. Among all available choices, three EMI shielding methods stand out as the most widely used and most flexible-friendly:copper layers, shielding f

In the flexible PCB manufacturing process, the black hole process is a crucial step that improves interlayer conductivity and overall product reliability. From a manufacturer’s perspective, this method replaces traditional electroless copper deposition with a cleaner and more stable carbon-based treatment, making it ideal for modern flexible PCB production. What Is the Black Hole Process? The black hole process is a non-metallic conductive hole pretreatment used to create a t

In flexible PCB manufacturing, The function of adhesive is to bond together all the layers of the circuit board. The main types of flexible PCB adhesive are epoxy, acrylic, thermoplastic PI, pressure-sensitive adhesive, and conductive adhesive. Different adhesives are applied in different processes. They all have their own unique characteristics. 1. Lamination Adhesive Lamination adhesives can bond the copper foil to the polyimide film or join multiple flexible printed circui

The main chemicals used in flexible PCB etching are ferric chloride (FeCl₃), cupric chloride (CuCl₂), hydrochloric acid (HCl) for acid...

Why Biocompatibility Matters for Flex PCBs In medical and wearable electronics, the role of Flex PCBs goes beyond conducting...

As technology trends move toward miniaturization and higher performance, COB on flexible PCB is becoming a critical solution for modern electronics. This technique allows bare chips to be mounted directly onto flexible substrates, enabling space-saving, lightweight, and high-speed designs. At Flex Plus, we specialize in flex PCB manufacturing and offer COB services, enabling us to help customers bring advanced electronic designs to life quickly and efficiently. What Is COB on

PCB designers often rely on common "standards" when working with flex PCB, leaning toward certain thicknesses that balance cost and...

Relationship between copper thickness, trace width, and current in flex PCB design In flex PCB design, understanding the relationship...

Why Are Rigid PCB Layer Counts Usually Even? In rigid PCB design, we typically see layer counts like 2, 4, 6, or 10—rarely odd numbers....