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Słowniczek PCB
25.05.2017
Accepted file format for printed circuit board designs

Accepted file format for printed circuit board designs

The commonly accepted file format for printed circuit board designs is the Extended Gerber RS-274X with drilling files in Excellon format. Most of PCB manufacturers also accept the following file formats: Gerber RS-274X2 ODB++ Eagle BRD (up to 4 layers) Mania-Barco DPF GraphiCode GWK Gerber RS-274D + separate file(s) with apertures.   ...
06.04.2017
Construction of multi-layer PCB

Construction of multi-layer PCB's

Core, prepreg & copper foil.   Multi-layer printed circuits, when compared to single or double-layer circuits, exhibit a more complex layer structure. An example stackup is shown in Fig. 1 which presents the layer stack of a typical 4-layer circuit. It is made up of three basic elements: core (1), prepregs (2) and copper foils (3).     Fig. 1. Typical structure of a 4-layer circuit.   Definitions of specific elements are presented below:   Core– double-sided laminate on whose copper layers internal layers of multi-layer circuits are represented. Thickne...