PHOTOMASK DEFINED LASER MACHINING
Original Publication Date: 1984-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
The use of high power lasers in precision machining operations is now widespread. The technology is limited, however, in one important respect; viz., the precision with which features can be located is limited to the precision of the mechanical transport of the laser or alternatively of the workpiece. This limit would not be important were it not desirable to effect the transport rapidly. Using a single spindle printed circuit board NC drilling head, for example, the hole location tolerances are at best +/- O.OO1'l. (Refer to IPS Printed Wiring Design Guide, Number 4.2.1, "Plated Through Hole Interconnections", Table 1, p. 8). For many applications, these tolerances are unacceptable.