Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Kinematic fixtures to enable multi-material printing and rapid non-destructive inspection during two-photon lithography

Journal Article · · Precision Engineering
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
+ Show Author Affiliations
Here, two-photon lithography (TPL) is a polymerization based technique that enables additive manufacturing of millimeter scale parts with submicron features. TPL equipment is often based on retrofitted optical microscopes that lack precise registration capabilities. Consequently, slow and error-prone visual alignment to fiducials is necessary if registration to pre-existing features is required. Herein, we have designed, built, and tested precise kinematic fixtures that are repeatable to within ±315 nm (3σ value) and passively register the build surface to TPL equipment with an accuracy of ±1.7 μm. This enables one to sequentially print with multiple materials by building the structures directly on top of the kinematic fixtures. In addition, the same fixtures passively register to an X-ray computed tomography (CT) system to enable non-destructive 3D inspection that is integrated with the fabrication process. These fixtures (i) provide a practical means to handle micro-scale parts during non-destructive imaging, (ii) reduce the set-up time for X-ray CT from more than an hour to less than a few minutes, and (iii) eliminate operator uncertainty from the multi-material printing and imaging process. As such, these fixtures enable new printing and imaging functionalities that are critical for high-quality additive manufacturing of multi-material polymer parts with microscale and submicron features.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1474271
Alternate ID(s):
OSTI ID: 1692030
Report Number(s):
LLNL-JRNL--736107; 888506
Journal Information:
Precision Engineering, Journal Name: Precision Engineering Journal Issue: C Vol. 54; ISSN 0141-6359
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

Figures / Tables (10)

Fig. 1(p. 6)figure Fig. 1
Fig. 2(p. 8)figure Fig. 2
Fig. 3(p. 9)figure Fig. 3
Table 1(p. 10)table Table 1
Fig. 4(p. 11)figure Fig. 4
Fig. 5(p. 12)figure Fig. 5
Fig. 6(p. 13)figure Fig. 6
Table 2(p. 16)table Table 2
Fig. 7(p. 17)figure Fig. 7
Fig. 8(p. 18)figure Fig. 8

Similar Records

X-ray Computed Tomography as a Metrology Technique for the Analysis of Additively Manufactured Material
Technical Report · Fri Sep 02 00:00:00 EDT 2022 · OSTI ID:1885728
Surface Roughness Calculations of Additively Manufactured Cylinders via X-Ray Computed Tomography
Technical Report · Fri Mar 18 00:00:00 EDT 2022 · OSTI ID:1856135

Related Subjects

42 ENGINEERING
47 OTHER INSTRUMENTATION
77 NANOSCIENCE AND NANOTECHNOLOGY
Additive manufacturing
Integrated metrology
Kinematic coupling
Radiograph
X-ray imaging