A via is created by drilling a hole through a copper pad etched on each layer of a PCB. An Annular Ring is the area between the edge of the drilled via and the copper pad associated with that hole. The greater the width of an annular ring, the greater the copper connection around the drilled via will be.In a multilayer PCB, traces are routed from one layer to another layer with the help of vias. T...read more

Design Rule Checking (DRC) is a process used to identify errors and mismatches such as spacing & trace widths in a PCB design/layout. The layout of a PCB board is designed using software, each PCB fabricator has a set of rules which they publish that specify various parameters such as what the spacing between each line should be, the minimum size of vias, the width of a line etc.Once a design ...read more

Blind Vias connect the outermost layer of a multilayer PCB to a layer in the middle of the board. Blind vias can only be seen on one side of the board (that's where they get the name from). These vias enable designers to optimize their circuit layout by providing more space for routing. However, in comparison to Through-Hole Vias they are more difficult to construct and can cause the cost of c...read more

A Buried Via hole connects layers inside a multi-layer PCB. These vias cannot be seen on the surface of a Printed Circuit Board. Buried vias are difficult to construct, as they need to be created in layers within the PCB. Designers like to use these vias, as they do not take up board space on every layer, thereby enabling smaller PCBs.High-density PCBs use buried vias.

A via is used to make an electrical connection between the layers of a Multi-Layer PCB. Connecting multiple layers of the board make it possible to reduce the size of the PCB. A via is constructed by placing copper pads on each layer of the PCB and drilling a hole through them. The hole is made conductive through electroplating or by placing copper cylinders directly in the drilled holes.The inner...read more

Tg is the glass transition temperature of a Printed Circuit Board. It is that temperature at which the base material of a PCB starts to transform from a brittle condition to a soft, elastic one. A PCB whose glass transition temperature (Tg) is greater than 170 ? is known as a High Tg PCB. General, Tg values for PCBs lie between 120 and 170 ?.Every PCB has a different Tg value based on its substrat...read more

HDI stands for ‘High Density Interconnects’. An HDI PCB is a dense version of a printed circuit board where the components are placed closer to each other allowing the overall board size to be smaller. HDI printed circuit boards use optimized routing, smaller components, BGA component footprints and optimized vias to make connections between the components on the board.In regular PCBs ...read more

AFlexible Printed Circuit Board (PCB) is a board that can be bent to conform to a desired shape during its application. The board can be bent or twisted without damaging the circuit. The substrate material used to build the PCB is responsible for its flexibility. Polyamide, PEEK (Polyether ether ketone) or a transparent conductive polyester film are common substrates used to make flexible PCBs.The...read more

A Rigid-Flex PCB is a hybrid board that consists of a combination of rigid and flexible printed circuit boards. These boards are designed by combining flexible circuit boards with one or more rigid boards.The flexible part of the board is usually used for providing interconnections between rigid boards, which allows narrow conductor lines which take up less space making the boards smaller. Using f...read more

A Rigid PCB as the name suggests is a circuit board that can not be bent or folded. The base material of the board is made of a rigid substrate which gives the board rigidity and strength. Components are soldered on to the board and copper traces/paths are etched on to the rigid pcb to make connections between them.Rigid Printed Circuit Boards are the most common type of PCB. Most electronic syste...read more

A Printed Circuit Board or PCB is a board that is used to connect electrical components. The board is made out of Fiberglass, Epoxy and other laminated material with copper tracks in place of wires to make connections between components. Components like Microchips, Diodes, Resistors and Switches are soldered on to the board and the copper traces provide the electrical connections between them thro...read more