| 摘要 |
The present invention provides a method and apparatus for drilling a plurality of holes in a stretched substrate in at least two directions not in the same plane, including providing a substrate in a substrate holder, stretching the substrate in at least one direction to a stretched configuration, and drilling at least one hole in the substrate while in a stretched configuration. The present invention further provides methods and apparatus for drilling impinging jet nozzles in stretched or pre-stretched substrates. |
