2026-09-23T15:46:28Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/85392022-01-13T07:54:36Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Joseph M. Jacobson.
Wilhelm, Eric Jamesson, 1977-
Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
Massachusetts Institute of Technology. Department of Mechanical Engineering
2005-08-23T21:05:17Z
2005-08-23T21:05:17Z
2001
2001
http://hdl.handle.net/1721.1/8539
49013668
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.
Includes bibliographical references (leaves 97-98).
A machine was designed to pattern thin films of liquid by liquid embossing. 10 designs were prototyped and evaluated according to pattern transfer, alignment, and ability to emboss large area. The final design utilizes a PDMS stamp cast such that it seals an air cavity, which is then pressurized to slightly bow the stamp. The cavity is clear so alignment can be accomplished by optical feedback using a camera and microscope objective. The theory of liquid embossing is discussed. PDMS has a very high contact angle with most fluids and so it is able to clear liquid from channels approximately 5 [mu]m wide. The wettability of the substrate is modified after being in contact with PDMS so the liquid does not reflow into the channels. Sub-micron alignment between layers was achieved. Vector plots of runout between layers are given. Electrical yield was found to be 89% and was not negatively correlated by stamp age up to 1000 dry stamps. The stamps were found to wear, but due to their conformal nature this did not affect pattern transfer. Structures created by the liquid embossing machine include electrostatic actuators, test patterns with 100 nm features, vias, under-etched metal layers, and released cantilevers.
by Eric J. Wilhelm.
S.M.
98 leaves
11919272 bytes
11919030 bytes
application/pdf
application/pdf
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Mechanical Engineering.
Design of a liquid embossing machine
Liquid embossing machine
Thesis
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