Browse Prior Art Database

Fabrication and Alignment of Apertures

IP.com Disclosure Number: IPCOM000120492D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 37K

Publishing Venue

IBM

Related People

Beese, L: AUTHOR [+2]

Abstract

This article describes a method to fabricate individual filters or apertures for any size pinhole with perfect alignment.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Fabrication and Alignment of Apertures

      This article describes a method to fabricate individual filters
or apertures for any size pinhole with perfect alignment.

      The method disclosed herein enables the fabrication of an
aperture or a beam stop specific to any size or shape incident beam.
The incident light source can be an ordinary incandescent light bulb,
ultraviolet light, or an x-ray source.  The type of source depends
upon the size of the desired aperture or stop.  Stops or apertures
can be made as small as several hundred Angstroms.  Since the
operation is done in situ, the alignment is built into the device.
The series of stops needed to fabricate this item is shown in
schematic form in the drawing.  The example described deals with a
diffraction experiment where soft x-rays are used. The incident beam
is defined by a small aperture which can also be fabricated by this
technique and covers the specimen only.  The beam passing through the
crystal is stopped by the fabricated stop.  The diffracted beam is
then recorded on the other side of the beam stop.

      Disclosed anonymously.