Title Modular teaching and learning offers for contemporary and needed further education
Project Number D/04/B/F/PP-146 157
Product CAD of Electronic Elements and Systems - Basic Rules of Topology Design
Title CAD of Electronic Elements and Systems - Basic Rules of Topology Design
Product Type modules
The module introduces basic requirements and recommendations for designing printed circuit boards (PCB) developed mainly for the application of surface mounting technology. PCBs must be designed in order to be able to meet various standards resulting from the whole complex of used technology operations (mounting, soldering, checking, etc.)
The printed circuit board design must follow three basic recommendations:
1. Recommendations resulting from the soldering technology to be used.
2. Technological capabilities of the printed circuit board production.
3. Electrical functionality and testing of mounted printed circuit boards.
Target group Workers in SME, trainers from various area of industry, high school teachers
It is necessary to define the soldering technique of components right at the beginning of the process of designing PCB (using tin waves or melting tin paste), soldering side and direction for the tin wave. The following types of components and soldering technique are widely used in practice:
• Through Hole components – axial or radial that are usually soldered by tin wave.
• Surface mounting technology (SMT) components – they can be soldered by using tin wave or soldering tin paste (within reflow oven).
• Non through whole components for surface mounting technology – soldered by melting.
Printed circuit boards must be designed in order to be easily manufactured. In other words PCB designs must accord with producers’ technological capabilities. Before creating a particular PCB design, one must specify the number of conductive films of a surface bonding which in turn depends on the density of conductive connections among electronic components and the PCB size. The PCB topology proposal must take into account the limits of accuracy classes of PCB producers which reflect technological capabilities of the PCB production.
Another determining factor affecting the PCB design proposal is the electric current loading and voltage capacity of conductors on surface bonding. On their basis it is necessary to design correctly the width of conductive bonding and isolation gaps between conductive bonding. Furthermore, a topology design must contain testing points that would be mechanically accessible for testing needles. Component’s localization on the PCB should also comply with visual control needs.
Area of application
secondary school, bachelor and master degree
CD, WEB site, word, Power point
on line, of line, E learning