Browse Prior Art Database

Laser Multiple Hole Drilling

IP.com Disclosure Number: IPCOM000073452D
Original Publication Date: 1970-Dec-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Dakss, ML: AUTHOR [+4]

Abstract

This is a maskless technique for simultaneously drilling a plurality of holes in a work piece. A multilens hologram 10 consisting of a superposition of Fresnel lenses simultaneously focuses an incident laser beam 12 to a series of spots 14 in positions determined previously in the formation of the hologram. The work-piece 16 is moved into position and the laser beam is flashed on as many times as necessary. The multi-lens hologram 10, which is stationary, focuses the beam 12 to the series of spots 14 at the required hole positions and the holes are drilled, precisely registered with respect to each other.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Laser Multiple Hole Drilling

This is a maskless technique for simultaneously drilling a plurality of holes in a work piece. A multilens hologram 10 consisting of a superposition of Fresnel lenses simultaneously focuses an incident laser beam 12 to a series of spots 14 in positions determined previously in the formation of the hologram. The work- piece 16 is moved into position and the laser beam is flashed on as many times as necessary. The multi-lens hologram 10, which is stationary, focuses the beam 12 to the series of spots 14 at the required hole positions and the holes are drilled, precisely registered with respect to each other.

A series of holograms could be made and sequentially changed to provide different patterns. Also, the technique could be extended to line scribing, resistor trimming, laser beam welding, and the direct formation of integrated circuit interconnections. A kinoform may also be used instead of a hologram.

1

Page 2 of 2

2

[This page contains 1 picture or other non-text object]