NDLI: An Experimental Study of Spray Cooling of a Flip Chip

Content Provider	IEEE Xplore Digital Library
Author	Tay, A.A.O. Lin, C.C.T. Gao Xiang Yang Somasundaram, S.
Copyright Year	2007
Description	Author affiliation: Nat. Univ. of Singapore, Singapore (Tay, A.A.O.; Lin, C.C.T.; Gao Xiang Yang; Somasundaram, S.)
Abstract	With the relentless trend of increasing power and decreasing dimensions, thermal management of electronic packages is becoming a critical issue. Existing cooling techniques are fast becoming inadequate for the powerful electronic components expected in the near future. Researchers all over the world have been experimenting with advanced cooling techniques such as spray and impingement cooling using different liquids such as water and fluroinert fluids. This paper describes an experimental study of spray cooling of a flip chip. The chip used is an 11 mm times 11 mm test chip containing resistors and diodes for heating of the chip and sensing the chip temperature, respectively. The test chip is mounted onto a printed circuit board (PCB) and water is sprayed onto the chip. Other components in the experimental set-up include a nozzle-pump assembly with essential valves and pressure gauges to regulate the flow as required. A state of the art thermal transient tester (T3ster) is used to measure the transient temperature of the test chip. The transient temperature data collected by T3ster is processed by software to give the thermal capacitance/resistance differential structure function. From this plot the thermal resistance at the surface of the chip due to spray cooling can be obtained and hence the heat transfer coefficient. A parametric investigation has also been conducted and the parameters that are considered include chip to nozzle height (H), spraying pressure (P) and heat flux (q) in the chip. A high heat transfer coefficient of 28,500 $W/m^{2}K$ was obtained for H=60 mm, P=1 bar and q=53 $W/cm^{2}.$ It was found that the heat transfer coefficient increases dramatically with heat flux, probably due to increased evaporation rate.
Starting Page	167
Ending Page	171
File Size	526551
Page Count	5
File Format	PDF
ISBN	9781424413249
DOI	10.1109/EPTC.2007.4469844
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-12-10
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Flip chip Electronics cooling Circuit testing Thermal resistance Heat transfer Electronic packaging thermal management Thermal management Temperature measurement Thermal spraying Surface resistance
Content Type	Text
Resource Type	Article

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