Method and apparatus for micromachining using hard X-rays
Abstract
An X-ray source such as a synchrotron which provides a significant spectral content of hard X-rays is used to expose relatively thick photoresist such that the portions of the photoresist at an exit surface receive at least a threshold dose sufficient to render the photoresist susceptible to a developer, while the entrance surface of the photoresist receives an exposure which does not exceed a power limit at which destructive disruption of the photoresist would occur. The X-ray beam is spectrally shaped to substantially eliminate lower energy photons while allowing a substantial flux of higher energy photons to pass through to the photoresist target. Filters and the substrate of the X-ray mask may be used to spectrally shape the X-ray beam. Machining of photoresists such as polymethylmethacrylate to micron tolerances may be obtained to depths of several centimeters, and multiple targets may be exposed simultaneously. The photoresist target may be rotated and/or translated in the beam to form solids of rotation and other complex three-dimensional structures. 21 figs.
- Inventors:
- Issue Date:
- Research Org.:
- Associated Universities Inc
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 541752
- Patent Number(s):
- 5679502
- Application Number:
- PAN: 8-405,662; TRN: 97:019544
- Assignee:
- Wisconsin Alumni Research Foundation, Madison, WI (United States)
- DOE Contract Number:
- AC02-76CH00016
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 21 Oct 1997
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 07 ISOTOPE AND RADIATION SOURCE TECHNOLOGY; 43 PARTICLE ACCELERATORS; X-RAY SOURCES; PMMA; MACHINING; HARD X RADIATION; BEAM OPTICS; MASKING; BEAM SHAPING; SYNCHROTRONS
Citation Formats
Siddons, D P, Johnson, E D, Guckel, H, and Klein, J L. Method and apparatus for micromachining using hard X-rays. United States: N. p., 1997.
Web.
Siddons, D P, Johnson, E D, Guckel, H, & Klein, J L. Method and apparatus for micromachining using hard X-rays. United States.
Siddons, D P, Johnson, E D, Guckel, H, and Klein, J L. Tue .
"Method and apparatus for micromachining using hard X-rays". United States.
@article{osti_541752,
title = {Method and apparatus for micromachining using hard X-rays},
author = {Siddons, D P and Johnson, E D and Guckel, H and Klein, J L},
abstractNote = {An X-ray source such as a synchrotron which provides a significant spectral content of hard X-rays is used to expose relatively thick photoresist such that the portions of the photoresist at an exit surface receive at least a threshold dose sufficient to render the photoresist susceptible to a developer, while the entrance surface of the photoresist receives an exposure which does not exceed a power limit at which destructive disruption of the photoresist would occur. The X-ray beam is spectrally shaped to substantially eliminate lower energy photons while allowing a substantial flux of higher energy photons to pass through to the photoresist target. Filters and the substrate of the X-ray mask may be used to spectrally shape the X-ray beam. Machining of photoresists such as polymethylmethacrylate to micron tolerances may be obtained to depths of several centimeters, and multiple targets may be exposed simultaneously. The photoresist target may be rotated and/or translated in the beam to form solids of rotation and other complex three-dimensional structures. 21 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {10}
}