| 摘要 |
<p>1278471 Working ceramics UNIVERSITY OF BIRMINGHAM and SPARCATRON Ltd 14 Jan 1970 [14 Jan 1969] 2191/69 Heading B5E A method of working materials, such as ceramic substrates for micro electronic components, comprises laying a workpiece 10 on support means 30, directing a laser-beam 20 upwardly through a hole 31 in the support means against the underside of the workpiece, and focusing the laser-beam substantially at the level of the upper end of the hole. The support means consists of a work-table 30 having walls 32 which act to shroud the laser-beam emitter and optical system 20. A probe 40 indicates the axis of the laser-beam and co-operates with a template 50 to locate the workpiece. In another arrangement, the workpiece is located between the template and a base-plate having holes for registering with the hole 31 in the work-table. The probe may have a bore to permit a drill or reamer to be passed through the probe to enlarge the hole formed by the laser-beam. The probe acts to prevent stray emission from the beam and may control actution of the beam. A shutter may be provided below the work-table.</p> |
