Browse Prior Art Database

Holographic Circuit Pattern Generator

IP.com Disclosure Number: IPCOM000091526D
Original Publication Date: 1968-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Tamulis, JC: AUTHOR [+2]

Abstract

Registration problems encountered in producing a multilayer circuit panel are overcome by rigidly coupling a hologram, containing images of each circuit layer, to the workpiece during processing. Workpiece 1 and hologram 2 are mounted in frame 3 with the spacing between them equal to the focal length of the hologram. Exposing station 4 consists of laser 5 and shutter 6 with devices for positioning assembly 10 at a plurality of angles with respect to laser 5. The assembly, with the hologram fastened to workpiece, is moved through a series of processing operations such as coating 7, developing 8 and etching 9. The assembly is immersed in each tank in a manner such that the respective solutions contact only the workpiece.

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Holographic Circuit Pattern Generator

Registration problems encountered in producing a multilayer circuit panel are overcome by rigidly coupling a hologram, containing images of each circuit layer, to the workpiece during processing. Workpiece 1 and hologram 2 are mounted in frame 3 with the spacing between them equal to the focal length of the hologram. Exposing station 4 consists of laser 5 and shutter 6 with devices for positioning assembly 10 at a plurality of angles with respect to laser 5. The assembly, with the hologram fastened to workpiece, is moved through a series of processing operations such as coating 7, developing 8 and etching 9. The assembly is immersed in each tank in a manner such that the respective solutions contact only the workpiece. Each time the assembly arrives at the exposing station, the angular position of the assembly is shifted with respect to the laser beam in order to readout a new circuit pattern.

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