PCB Via Is Used To Connect Pads On Two Different Layers

The invention of the printed circuit board or the PCB helped to mount all the active electronic components like resistors, capacitors, diodes, and others at one place. The layers of PCBs increased from one to multiple numbers. The interconnection between the layers was effected by using a PCB via.

When there are too many components to be mounted on a PCB and the area is limited, multiple layers of connections are created on the same circuit board. The multiple layers need some means to connect the various components to a signal and power sources. The connections are provided by the pads.

Pads are the pieces of copper strips that are present in different layers of a multilayered PCB, which act as the connections inside that layer. The connection between pads on the different layers is achieved by using vias. The pads complete the connection between components mounted on the top layer of the PCB.

The construction of a PCB via is accomplished by making a hole between pads on two or more layers of the PCB. A copper tube of the same size as the hole is passed through it. The flanges at the ends of the tube touch the pads to complete the connection.

The connection provided by the PCB via in pad is the easiest way of completing the connection between two layers. These vias can be of various types like blind vias, buried vias, and thermal vias. Only one side of the blind vias is visible. Buried vias cannot be seen from either side of the board while thermal vias are used to draw away the heat from inside a multi-layered board.

The small shiny metallic circles that appear on the upper and lower sides of a PCB are the vias that connect the circuits in the different layers. The pins of the components pass through these vias and are then soldered on the other side.

PCB Board Manufacturer Produces The Best Circuit Boards

Printed circuit board is the basic requirement for making different kinds of electronic gadgets and appliances. Electronic components control the various functions of the appliance. These electronic components are mounted on the PCBs made by a PCB board manufacturer who designs the most suitable board that can take all components.

The electronic components are interconnected by land patterns that are nothing but thin strips or lines of copper lying on the surface of the printed circuit board. The thin lines of copper act as the cables and wires that are used for providing electrical connections. The land patterns make the electrical connections compact and reliable.

A printed circuit boards can have a single layer, a double layer or multiple layers. The number of layers increases the density of the electronic components mounted on a given surface area. The material of most of the PCBs is glass epoxy that is a heat-resistant non-conducting material. All kinds of active components such as diodes, resistors, capacitors and others are mounted on the PCB.

Earlier a PCB board manufacturer used a method by etching the circuit on the thin layer of copper covering the glass epoxy board. The etching consisted of pin pads for components and traces as the connections between components. The extra copper was removed by treating the surface with acid that left behind the etched portion while removing the portions that were not etched.

The modern process of PCB fabrication is totally mechanized raising the degree of manufacture to high level of perfection. The process of creating the circuit on the boards is done by the most modern means so that there is no break in connections or wrong placement of components. The boards have separate planes for power and ground. Holes with plates called vias connect the components to different layers.

All companies that manufacture electronic gadgets and appliances source their printed circuit boards from a dependable PCB supplier. The companies that supply the PCBs can manufacture all kinds of boards depending on the circuit requirements of the particular appliance. They also produce heat sinks to go with the PCBs and the components that are mounted on them.