SMD Stencil
SMD stencils are used for the assembly of printed circuit boards (see PCB assembly). They usually consist of stainless steel in the typical thickness of 80µm to 250µm. Openings (pads)…
Location Hole
Description:Location holes are non-plated-through holes (Npth), which allow an accurate positioning of the printed circuit board for processing. The placement of the location holes is…
Via Filling
Via filling is the process of filling the vias with a non-conductive paste in order to close them. Usually this is required for PCBs with a large amount of drills when the fixation in…
Gerber data
The Gerber data type consists of graphics commands, which specify a circuit layout by x- and y- coordinates and vectors. Originally developed for the control of photoplotters, it is now…
HAL
HAL stands for Hot Air (Solder) Leveling (German: Heißluftverzinnung). Within printed circuit board manufacturing, HAL is the name of the procedure as well as the resulting surface.During the…
Impedance Control
For printed circuit boards with high frequency signals, the signal integrity has to be provided by good impedance characteristics of the conductors. To ensure the desired…
