| 词条 | Non functional pad |
| 释义 |
A non-functional pad is a pad in a printed circuit board that is not connected to a track on the layer it is on. RemovalNon-functional pads can be removed at any phase of the design process. Some software allows precise control during the design process, and also removes the non-functional pads during output file creation. Furthermore, some board manufacturers remove non-functional pads during data preparations. Occasionally, this process of non-functional pad removal is also called unused pad suppression. The benefits of removing the non-functional pads are limited. Electrically, it creates needless extra capacitance in certain designs, which needs to be removed. Removing non-functional pads can improve the drilling process, as it lessens drill wear. Non-functional pad removal can influence the reliability. (e.g. barrel cracking failure mode). Removal can increase or decrease reliability. Depending on design parameters, removing the non-functional pads can free up routing space. Non-functional pads naturally also affect thermal characteristics. Sometimes, non-functional pads (or their removal) are used for chopper balancing, which affects etching, bow and twist and other effects. Bibliography
1 : Printed circuit board manufacturing |
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