![]() The layer ID shows what side the part is placed on, and the rotation displays the orientation of the component.Ĭonsistency in rotation of the original component is critical to report. Components are applied and held to the board by the solder paste and the glue dots securing the components as they are soldered to the board.įor component placement a part placement/centroid file is required to know where the center of the part is. Solder paste is applied to the exposed pads and the stencil is removed. The solder paste file is used to mask the entire board except those areas that will be soldered. It is good to learn how and why the assembly house makes its stencils and duplicate it to ensure consistency from each assembly house (the common name for any company that assembles boards). The designer may create the solder paste file to his/her own preference with experience. Some board houses choose to make their own solder paste file/stencil. The database can also be used to determine the location of pin 1. The Gerber files are used to define the pad locations and help the assembly house determine where pin 1 is located and provides a heads-up of how the board looks. If possible, the design database, specifying the database format (program name) ![]() Solder paste file (one of the Gerber files) for all sides mounted Part centroid text file with Reference Designators, external placement layer, and X & Y location and rotation in ASCII format. ![]() Gerbers in 274-X (embedded apertures) including fabrication drawing. The following are the required elements for auto assembly: Thus the need for auto assembly was developed. ![]() As technology progresses, components get smaller and more difficult to assemble by hand and the amount of components that may fit on a single board increases. Originally, all PCBs were assembled by hand using only a solder iron. ![]()
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