skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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 andmore » submicron features.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1474271
Alternate Identifier(s):
OSTI ID: 1692030
Report Number(s):
LLNL-JRNL-736107
Journal ID: ISSN 0141-6359; 888506
Grant/Contract Number:  
AC52-07NA27344; 16-ERD-006
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Precision Engineering
Additional Journal Information:
Journal Volume: 54; Journal Issue: C; Journal ID: ISSN 0141-6359
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 77 NANOSCIENCE AND NANOTECHNOLOGY; 47 OTHER INSTRUMENTATION; Additive manufacturing; X-ray imaging; Radiograph; Kinematic coupling; Integrated metrology

Citation Formats

Saha, Sourabh K., Uphaus, Timothy M., Cuadra, Jefferson A., Divin, Chuck, Ladner, Ian S., Enstrom, Kenneth G., and Panas, Robert M. Kinematic fixtures to enable multi-material printing and rapid non-destructive inspection during two-photon lithography. United States: N. p., 2018. Web. doi:10.1016/j.precisioneng.2018.05.009.
Saha, Sourabh K., Uphaus, Timothy M., Cuadra, Jefferson A., Divin, Chuck, Ladner, Ian S., Enstrom, Kenneth G., & Panas, Robert M. Kinematic fixtures to enable multi-material printing and rapid non-destructive inspection during two-photon lithography. United States. https://doi.org/10.1016/j.precisioneng.2018.05.009
Saha, Sourabh K., Uphaus, Timothy M., Cuadra, Jefferson A., Divin, Chuck, Ladner, Ian S., Enstrom, Kenneth G., and Panas, Robert M. Wed . "Kinematic fixtures to enable multi-material printing and rapid non-destructive inspection during two-photon lithography". United States. https://doi.org/10.1016/j.precisioneng.2018.05.009. https://www.osti.gov/servlets/purl/1474271.
@article{osti_1474271,
title = {Kinematic fixtures to enable multi-material printing and rapid non-destructive inspection during two-photon lithography},
author = {Saha, Sourabh K. and Uphaus, Timothy M. and Cuadra, Jefferson A. and Divin, Chuck and Ladner, Ian S. and Enstrom, Kenneth G. and Panas, Robert M.},
abstractNote = {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.},
doi = {10.1016/j.precisioneng.2018.05.009},
url = {https://www.osti.gov/biblio/1474271}, journal = {Precision Engineering},
issn = {0141-6359},
number = C,
volume = 54,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Figures / Tables:

Fig. 1 Fig. 1: Schematic of the two-photon lithography process.

Save / Share: