What is Conductive Adhesive?
Conductive adhesive is a type of glue that can still conduct electricity after curing. It is mainly composed of resin and conductive particles. When conductive particles come into contact with each other, they can form a path, allowing current to flow through.
What is PTH?
PTH (Plated Through Hole), also known as electroless copper plating, is a process that makes the walls of drilled holes conductive. In simple terms, it is first to apply a layer of catalyst (usually palladium) on the hole wall, and then deposit a layer of copper on the hole wall through a chemical plating process, enabling conduction between the top and bottom layers of the PCB.
Drawbacks of Conductive Adhesive
Conductive adhesive has many drawbacks:
1. Low conductivity and poor heat dissipation
2. Unstable contact resistance in humid environments
3. Weak mechanical strength
4. Conductive filler migration over time
PTH technology avoids issues like hole looseness, blockage, and resistivity variation, ensuring high reliability and stability.
In PCB production, the cost of the conductive adhesive process is only about one-sixth of that of the PTH. To save costs, some manufacturers may lower the standards and use conductive adhesives instead of PTH.
However, this approach will affect the conductivity and stability of the board. PCBasic has always prioritized quality and only uses the PTH process to ensure that every circuit board is reliable and durable.
