Circuit Boards Fabrication Type of the Base Material: FR 4 is often used for PWB and Printed Circuit Boards

... with the layers, and explained to the fabricator in a README file. The idea here is that the fabricator should be able to quickly | CIRCUIT BOARDS FABRICATION | understand what each file is and where it goes in the stackup. If you wish to continue using | GERBER DATA |, switch to 274X. | CIRCUIT BOARDS FABRICATION | 274D is obsolete; the external aperture information is more cumbersome and difficult for fabricators to deal with because they have to worry about translators and | CIRCUIT BOARDS FABRICATION | parsers to read the aperture table information. As a result, aperture data might be misinterpreted. Worse, someone might have typed in the information manually - | CIRCUIT BOARDS FABRICATION | and erroneously. By contrast, in 274X, all the aperture information is contained within the Gerber file, which can be read by most CAM tools automatically. | CIRCUIT BOARDS FABRICATION | For netlists, | IPC-D-356 | is the preferred format for fabrication. It's widely used by many of the bare-board test-fixturing machines and is one of | CIRCUIT BOARDS FABRICATION | the only true ways to identify power- to-ground shorts. With the information in this format coming ...
[ Circuit Boards Fabrication ]


... (0.4 mm) 3. Blind vias 4. Thin, flexible materials If high aspect ratio and small holes are processed in the vertical mode, vibration is | CIRCUIT BOARDS FABRICATION | recommended for each processing stage. The DMS-E process includes no cleaning sequence, therefore copper surfaces should be clean and holes should be free of all | CIRCUIT BOARDS FABRICATION | drill debris. This may be achieved by chemical cleaning (e.g. ultrasonics) or by brushing with an ultrasonic section to remove the drill debris prior to | CIRCUIT BOARDS FABRICATION | the DMS-E process. When processing double-sided panels through a horizontal line using sulfuric acid (e.g. Stabilizer) it is important to ensure that the through-holes are | CIRCUIT BOARDS FABRICATION | clean. This may be accomplished by introducing a desmear pretreatment. Used by over 150 PWB fabricators worldwide, the DMS-E system consistently delivers highly reliable plated | CIRCUIT BOARDS FABRICATION | through-holes on all commonly used laminate materials, PWB complexities and in a variety of operating conditions. Production-proven in both vertical and horizontal process equipment, the ...
[ Circuit Boards Fabrication ]


... to 274X. 274D is obsolete; the external aperture information is more cumbersome and difficult for fabricators to deal with because they have to worry | CIRCUIT BOARDS FABRICATION | about translators and parsers to read the aperture table information. As a result, aperture data might be misinterpreted. Worse, someone might have typed in the | CIRCUIT BOARDS FABRICATION | information manually - and erroneously. By contrast, in 274X, all the aperture information is contained within the Gerber file, which can be read by most | CIRCUIT BOARDS FABRICATION | CAM tools automatically. For netlists, | IPC-D-356 | is the preferred format for fabrication. It's widely used by many of the bare-board test-fixturing machines and | CIRCUIT BOARDS FABRICATION | is one of the only true ways to identify power- to-ground shorts. With the information in this format coming directly from the engineering CAD system, | CIRCUIT BOARDS FABRICATION | there's no danger of the fabricator "reverse engineering" the netlist from the Gerber files. Next up are the internal | PLANE LAYERS |. For some | CIRCUIT BOARDS FABRICATION | reason, CAD engineers like them to be "positive," but those ...
[ Circuit Boards Fabrication ]