Packaging components is a printed circuit design is a very important concept. Packaging element is the actual shape of the welding position and welding soldering components to a printed circuit board , including the dimensions of the actual device , the spatial position occupied by the spacing between the pin and the like .
Element package is a concept of space, the different elements may have the same package , a package may also be used for different components. Therefore, in the production of circuit board components must know the name , but also know the component package .
1 . Classification component package
There is a common component package pin surface mount package and the package into two categories.
Encapsulated components must stitch the corresponding pin is inserted through the hole in the pad , and then welded . Therefore, the transmission must be selected via pad , the design properties of the pad plate layer to be disposed Multi - Layer, as shown in FIG .
SMT ( surface mount package ) . This pin joints not only for the surface plate element layer or the bottom surface can also be used , solder without perforations . Property must be designed as a single pad as shown.
2 . Package several common elements
Common diode package classes of discrete components , transistor type, the variable resistor and the like. Common integrated circuit package has DIP - XX and so on.
Protel DXP integrated package will be used in Miscellaneous Devices PCB. PcbLib integrated library.
