2026-09-19T00:53:45Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/285602022-01-13T07:54:29Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
David J. Perreault and Charles R. Sullivan.
Jensen, Robert A. (Robert Allen), 1980-
Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2005-09-27T17:01:03Z
2005-09-27T17:01:03Z
2004
2004
http://hdl.handle.net/1721.1/28560
57418421
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.
Includes bibliographical references (p. 79-81).
Polymer Multi-Layer (PML) capacitors have demonstrated excellent performance for numerous power electronics applications, particularly where high temperature stability is required. These capacitors are sensitive to high humidity, and if they are not protected from moisture exposure their performance degrades rapidly due to electrochemical corrosion. Conventional protective coatings, such as epoxies and polyurethanes, are extremely thick--usually over 1 mm. Previous work has shown that a thick coating leads to a large equivalent series inductance (ESL) of the capacitor, and negatively affects the capacitor performance. An ultra-thin moisture barrier coating is desirable to improve both electrical performance and capacitance density. This thesis focuses on developing coatings which are thinner than 200 tm and which adequately protect PML capacitors from humidity. Novel moisture barrier designs have been fabricated and tested.
by Robert A. Jensen.
S.M.
81 p.
3535423 bytes
3544080 bytes
application/pdf
application/pdf
en_US
Massachusetts Institute of Technology
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http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
Ultra-thin moisture barrier coatings for passive components
Thesis
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<Abstract>Polymer Multi-Layer (PML) capacitors have demonstrated excellent performance for numerous power electronics applications, particularly where high temperature stability is required. These capacitors are sensitive to high humidity, and if they are not protected from moisture exposure their performance degrades rapidly due to electrochemical corrosion. Conventional protective coatings, such as epoxies and polyurethanes, are extremely thick--usually over 1 mm. Previous work has shown that a thick coating leads to a large equivalent series inductance (ESL) of the capacitor, and negatively affects the capacitor performance. An ultra-thin moisture barrier coating is desirable to improve both electrical performance and capacitance density. This thesis focuses on developing coatings which are thinner than 200 tm and which adequately protect PML capacitors from humidity. Novel moisture barrier designs have been fabricated and tested.</Abstract>
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