NDLI: Electronic packaging for extended Mars surface missions

Content Provider	IEEE Xplore Digital Library
Author	Shapiro, A.A. Ling, S.X. Ganesan, S. Cozy, R.S. Hunter, D.J. Schatzel, D.V. Mojarradi, M.M. Kolawa, E.A.
Copyright Year	2004
Description	Author affiliation: Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA (Shapiro, A.A.)
Abstract	Extended Mars missions require vehicles to survive a large number of extended temperature cycles. To address this issue for electronics, previous strategies have placed electronics in a "warm electronics box" where thermal management is more easily maintained. However, that strategy limits number and location of electronics. An alternative strategy allows electronics to be remotely located on actuator and wheel arms with no heating, which has the advantage of distributed control. This strategy requires the electronics to survive the Martian extremes of -120 to +20/spl deg/C for the duration of the mission. In addition, wheel motor controllers were mounted directly on the motor casing extending the temperature range on the warm side to +85/spl deg/C (including some margin). Since missions may last 18 months or more and with day-night cycles on Mars at about 26 hours this means exposure to approximately 500 cycles. Typical testing is performed to 3/spl times/ the number of cycles giving the electronics a testing requirement of -120 to +85/spl deg/C for 1,500 cycles. A chip on board strategy was selected and a parallel approach of materials characterization and physics of failure with engineering experimentation is being used to address the issues of a large temperature swing with many cycles. A full factorial experiment, designed to highlight expected failure modes from the physics of failure analysis, is being conducted. The experiment is designed to evaluate different substrate materials, different die attach materials and different encapsulants or coatings. Combinations of these materials are being evaluated on a test vehicle with a range of die sizes in an effort to determine lifetime and to verify failure modes. Initial results were presented.
Sponsorship	Aerosp. and Electron. Syst. Soc
Starting Page	2515
Ending Page	2527
File Size	771332
Page Count	13
File Format	PDF
ISBN	0780381556
ISSN	1095323X
DOI	10.1109/AERO.2004.1368046
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-03-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electronics packaging Mars Electronic equipment testing Conducting materials Vehicles Temperature Thermal management of electronics Wheels Physics Electronic packaging thermal management
Content Type	Text
Resource Type	Article
Subject	Aerospace Engineering Space and Planetary Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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