Electronic Glossary

Disassembling solder parts to repair or replace by wicking, sucking, heat and pull, or solder extraction after PCB assembly or functional testing.

An imaging operation in which unpolymerized (unexposed) photo-resist is dissolved or washed away to produce a copper PCB board with a photo-resist pattern for etching or plating.

Any type of electrical component on a PC board. It will have functions and properties unique to its type. In a schematic (and the extracted BOM) , it will be labeled with a value or device number. There are two …

Dissipation Factor (Df), also known as Loss Tangent (Tan δ). In printed circuit boards, Dissipation Factor is the measure of the power of signal loss due to the inherent dissipation of electromagnetic energy in the substrate. The lower a PCB …

What’s DFN Package?   Dual Flat No Lead (DFN) is a very small square-shaped or rectangular surface-mount plastic package with no leads, near chip scale package (CSP) with a low profile, moderate thermal dissipation, and good electrical performance. Metal pads …

A diode that conducts electrical only after its breakover voltage has been reached.

A die is an unpackaged, bare chip. A die is the formal term for the square of silicon containing an integrated circuit. Die is singular, and dice is plural. The terms die and chip are often used synonymously. A die, …

Die Bonding is a manufacturing process used in the packaging of semiconductors. It is the act of attaching a die (or chip) to a substrate or package by epoxy or solder, also known as Die Placement or Die Attach. The …

Dielectric refers to the fiberglass, polyimide and other materials in a PCB. The material is non-conductive and acts as an insulator for the electrical circuit in the PCB. The properties of the dielectric material can have an effect on the …

Dielectric Constant is the relative permittivity of a dielectric material (like FR-4, Polyimide) shorten to Dk, Er or ε. Constant determines the speed at which an electrical signal will travel in a dielectric material. Signal propagation speed is expressed relative …