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The IPC preferred term for an assembled board is circuit card assembly (CCA), [19] and for an assembled backplane it is backplane assembly. "Card" is another widely used informal term for a "printed circuit assembly". For example, expansion card. A PCB may be printed with a legend identifying the components, test points, or identifying
Eurocard is an IEEE standard format for printed circuit board (PCB) cards that can be plugged together into a standard chassis which, in turn, can be mounted in a 19-inch rack. The chassis consists of a series of slotted card guides on the top and bottom, into which the cards are slid so they stand on end, like books on a shelf.
Altium Designer supports import & export of various PCB and CAD data exchange file formats. [11] [12] The tool's native file formats are the binary file formats *.SchDoc and *.PcbDoc. It can also import and export AutoCAD *.dwg/*.dxf and ISO 10303-21 STEP file formats. [11]
These are standard file formats accepted by PCB fabrication companies, but given EAGLE's typical user base of small design firms and hobbyists, many PCB fabricators and assembly shops also accept EAGLE board files (with extension .BRD) directly to export optimized production files and pick-and-place data themselves.
ODB++ Format Data: Used by PCB manufacturers for the blank PCB and the component assembly as well. Pick-and-Place File : A text file listing component positions for the pick-and-place machine. Parts List : A customizable list of components used in the design.
The Gerber format is an open, ASCII, vector format for printed circuit board (PCB) designs. [1] It is the de facto standard used by PCB industry software to describe the printed circuit board images: copper layers, solder mask, legend, drill data, etc. [2] [3] [4] The standard file extension is .GBR or .gbr [1] though other extensions like .GB, .geb or .gerber are also used.
Thermal stress on the electronic assembly is kept as low as possible to prevent unnecessary contractions of the board which might cause immediate or future damage. In the 21st century, almost all soldering is carried out with lead-free solder , both on manufactured assemblies and in rework, to avoid the health and environmental hazards of lead .
Another drawback is the time involved in creating the images used to generate circuit board design data. In one study, a Versa 510 X-ray machine was used to image a 6 layer board, measuring about 5 in × 8 in (130 mm × 200 mm) - the imaging and processing of the cloud data took over 18 hours to complete.
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