| 摘要 |
A method of locating a socket on a printed circuit board which includes the steps of fabricating a plurality of pads and one or more fiducials on the upper surface of the printed circuit board, optically aligning a drill with the fiducial, and then drilling a socket hole through the printed circuit board at the location defined by the fiducial. A peg of the socket is inserted into the socket hole to align the socket with the printed circuit board. Alternatively, a method for locating holes on a printed circuit board includes the steps of forming a master tooling hole through the printed circuit board, locating a fiducial on the printed circuit board using the master tooling hole as a guide, focusing on the fiducial with an optically alignable drill, thereby aligning the drill, and then drilling a hole through the printed circuit board using the aligned drill. The fiducial is selected to be a material which provides a sharp optical contrast with the area surrounding the fiducial, thereby allowing the drill to be easily and accurately focused on the fiducial.
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