Thermal Resistance of Thermal Resistance of Heat Sink Interface Heat Sink Interface Material Testing Material Testing Device (TIM Tester) Device (TIM Tester) Progress Report Progress Report 3/8/2004 3/8/2004
Dec 20, 2015
Thermal Resistance of Heat Thermal Resistance of Heat Sink Interface Material Testing Sink Interface Material Testing
Device (TIM Tester)Device (TIM Tester)
Progress ReportProgress Report
3/8/20043/8/2004
Re-IntroductionRe-Introduction
Thermal interface materials (TIMs) fill gaps Thermal interface materials (TIMs) fill gaps between electronic devices and heat between electronic devices and heat sinks.sinks.
TIMs are now being designed with very TIMs are now being designed with very small thermal resistances.small thermal resistances.
Current standard does not test modern Current standard does not test modern TIMs with high certainty [1],[2].TIMs with high certainty [1],[2].
Re-IntroductionRe-Introduction
Team will design and build the structure, Team will design and build the structure, plumbing, and force application systems.plumbing, and force application systems.
Dr. Recktenwald and John Farley will Dr. Recktenwald and John Farley will design thermal data acquisition and data design thermal data acquisition and data reduction systems.reduction systems.
Product Design SpecificationsProduct Design Specifications
Supports the Transient MethodSupports the Transient Method
Test Several Types of TIMs Test Several Types of TIMs
Variable PressureVariable Pressure
Removable PucksRemovable Pucks
High Repeatability High Repeatability
Final Design ProgressFinal Design Progress
Overall concept has been establishedOverall concept has been established
Analysis of components and Assemblies Analysis of components and Assemblies has begunhas begun
Plumbing SystemPlumbing SystemHeater and Chiller with circulating loopsHeater and Chiller with circulating loops
Plumbing System ProgressPlumbing System Progress
Heater and Chiller are being researchedHeater and Chiller are being researched
Several possible valves have been Several possible valves have been identifiedidentified
Cross-Linked Polyethylene hose for the Cross-Linked Polyethylene hose for the pipespipes
Closed loop system including puck with Closed loop system including puck with cavitycavity
Force Actuator
Teflon Guide Rails
Load Cell
Aluminum Pucks
Alignment Alignment
RotationalRotational
Center on CenterCenter on Center
ParallelismParallelism
Aluminum PucksAluminum Pucks
Wet Puck
Dry Puck
Force ActuatorForce Actuator
RequirementsRequirements Up to 250 lbsUp to 250 lbs 12-24 Volts DC12-24 Volts DC 4-8 inches of stroke4-8 inches of stroke Low backlashLow backlash Not self-lockingNot self-locking Ball Screw DrivenBall Screw Driven
Force ActuatorForce Actuator
[3] http://www.duffnorton.com/emact.htm
Load CellLoad Cell
RequirementsRequirements
250 lbs250 lbs
Fits within puck guide railsFits within puck guide rails
As short as possible (column stability)As short as possible (column stability)
Compression OnlyCompression Only
Candidate Load CellCandidate Load Cell
Button type (load button)Button type (load button)
Compressive onlyCompressive only
250 lb capacity250 lb capacity
DimensionsDimensions Diameter = 1.25 inchesDiameter = 1.25 inches Height = 0.4 inchesHeight = 0.4 inches
Easily mountedEasily mounted
[4] www.TransducerTechniques.com
Force Actuator
Teflon Guide Rails
Load Cell
Aluminum Pucks
References
• [1] Kearns, Don, “Improving Accuracy and Flexibility of ASTM D 5470 for High Performance Thermal Interface Materials,” 19th IEEE SEMI-THERM Symposium, pg 129-33, 2003.
• [2] Lasance, Clemens J.M., Electronics Cooling, vol. 9, no. 4, 2003.
• [3] http://www.duffnorton.com/emact.htm, 3/8/2004.
• [4]http://www.transducertechniques.com/LBC-Load-Cell.cfm, 3/8/2004.