Transcript - IPC Training Home Page

DVD-97CC TranscriptAs mentioned before, some companies allow the factory flange of a replacement eyelet to be usedas a replacement land. If the original land was connected to a surface conductor, that conductoror its replacement must be re-connected to the eyelet flange that is now being used as a land.Before you insert the eyelet, lap solder a replacement piece of foil jumper onto the originalconductor, at a point where the original conductor is still firmly bonded to the board. Then, runthe new conductor material to the hole and let it extend down into the hole slightly. Then cleanthe conductor. Now, insert the eyelet into the hole allowing the factory flange to pin the foiljumper in place. Next, we’ll solder the replacement conductor to the eyelet flange and clean thearea thoroughly.Then, overbond the replacement conductor and cure the overbond epoxy according to the epoxymanufacturers instructions. Be sure to keep the overbond epoxy off the land and out of thethrough hole.The last step is to evaluate your work. First, lets check that the land and its conductor have securephysical bonds to the board. Make sure that the land or flange diameter does not violate minimumconductor spacing requirements.6