| Laminar Flow: A constant and directional flow of filtered air across a workbench, usually parallel to the surface of the bench. |
| Laminate: A composite material created by bonding several layers of same or different materials together. |
| Lamination: The process creating laminate using pressure and heat. |
| Land: Conductive area on a printed circuit board to which components are attached. |
| Laser Direct Imaging: A method that increases board density with laser technology. |
| Lead Forming: A process of cutting and forming leads on devices prior to placement on a PCB. Manual and automatic lead forming machines are available. |
| Lead Pitch: The center-to-center distance between leads of a package. |
| Leakage Current: A small amount of current that flows across a dielectric area between two adjacent conductors. |
| Legend: Printed letters or symbols on the PCB indicating important information like part numbers or company identification. |
| Local Fiducial: A mark used to locate the position of land patterns for components on a printed circuit board. |
| LPI: Liquid Photo-Imageable solder mask. |
