Electronic Glossary

Loss Tangent (Df), also called Dissipation Factor (Df).

A quantity of circuit boards that share a common design.

Some Customers require a manufacturer’s lot code to be placed on the board for future tracking purposes. Your order form is how you select it. A drawing can specify the location, what layer and if it is to be in …

Refers to contacts, which, due to their design and function, require very little force to plug together. Used mainly in miniature and high pin count connectors.

What’s a Low-pass Filter?   A Low-pass Filter is a filter that passes signals with a frequency lower than a selected cutoff frequency and attenuates signals with frequencies higher than the cut off frequency. The exact frequency response of the …

Liquid Photoimageable (LPI) refers to liquid photoimageable solder mask. printed onto rigid boards and rigid-flex PCB, while sometimes printed at narrow adjacent SMD pads when requiring “ganged” coverlay openings onto flexible circuit.

What’s LQFP?   Low Profile Quad Flat Pack (LQFP) is a surface-mount IC package with leads extending from all around four sides of the package body. QFP packages provide the same benefit of the metric TQFP packages with 1.4 mm …

What Is LVDA?   LVDS (Low-voltage Differential Signaling), also known as TIA/EIA-644, is a technical standard that specifies electrical characteristics of a differential, serial signaling standard, but it is not a protocol. LVDS operates at low power and can run …

A defect that is likely to result in failure of a PCB or PCBA by materially reducing its usability for its intended purpose. Also see Minor Defect.

Manufacturability in printed circuit board (PCB), refers to Design for Manufacturability (DFM), Design for Assembly (DFA), which defines the ability of a PCB design to meet PCB manufacturing capabilities and PCB assembly capabilities. With component packages getting smaller, PCB designs …