Thermal Interface Material Thermal Interface Material TesterTester

Team Members: Team Members: Joe HenryJoe Henry Andy HaleAndy Hale

Brian Francis Brian Francis Nick TenorioNick Tenorio

Industry Sponsor:Industry Sponsor: Tektronix TektronixIndustry Contact: Industry Contact: Chris ColemanChris Coleman

Academic Advisor: Academic Advisor: Gerry RecktenwaldGerry Recktenwald

IntroductionIntroduction

TIMs!TIMs!– Aid heat transfer for electronic devicesAid heat transfer for electronic devices

ProjectProject– Current standard test method inadequateCurrent standard test method inadequate– Transient testing method is betterTransient testing method is better– Test equipmentTest equipment– Controlled environmentControlled environment

Passive Puck

Active Puck

Surface Finish of 0.4 microns(Taken from ASTM Standard D5470-01)

Aluminum Pucks

Active Puck Chamber

O-Ring Gland

Ultem ManifoldUltem Manifold

• Thermally Isolates active puck

• Guides incoming/outgoing water

• Provides the other half of the seal

Active Puck and Manifold Assembly

Threaded InsertsPlumbing Fittings

PlumbingPlumbing

Hot & Cold TempsHot & Cold Temps

Circulating LoopsCirculating Loops

Solenoid ValvesSolenoid Valves

Introduce electricalIntroduce electrical

PlumbingPlumbing

Hot water @ 80 deg CHot water @ 80 deg C

Cold Water @ 10 deg CCold Water @ 10 deg C

Plumbing

CHILLERWITHPUMP

HEATERWITHPUMP

CLOSED

OPEN

OPEN

CLOSED

OPEN

CLOSED

SUPPLYTO

PUCKRETURN

FROMPUCK

RETURNFROMPUCK

CHILLERWITHPUMP

HEATERWITHPUMP

OPEN

CLOSED

CLOSED

OPEN

CLOSED

OPEN

SUPPLYTO

PUCK RETURNFROMPUCK

RETURNFROMPUCK

Temperature Switching Circulating Loops

StructureStructure

Force Application SystemForce Application System

Puck AlignmentPuck Alignment

Super StructureSuper Structure

Force Application SystemForce Application System

• Spherical End Factor- Satisfies Parallelism

Alignment SystemAlignment System

Guide RodsGuide Rods- Low friction- Low friction- Low heat conduction- Low heat conduction- Pucks are centered- Pucks are centered

Puck AccessPuck Access- Mid Plate Slots- Mid Plate Slots- Various Sizes- Various Sizes- Cam Lever- Cam Lever

Guide Rod

Teflon RailActuating Shaft

Alignment SystemAlignment System

Guide Slots

Cam Lever

Guide Rods

Safety Factor – 2.3Total Deformation – 0.03 in

PneumaticsPneumatics

Pneumatic system functionPneumatic system function– User defined pressureUser defined pressure– Pressure measurementPressure measurement– Pressure held constantPressure held constant

Pressure Regulator

Pneumatic System

User Interface

Pressure Gage

(Pressure Transducer

Behind Panel)

PneumaticsPneumatics

Constant PressureConstant Pressure– Low friction air cylinderLow friction air cylinder– AccumulatorAccumulator

PneumaticsPneumatics

Low Friction Air CylinderLow Friction Air Cylinder– Glass CylinderGlass Cylinder– Graphite PistonGraphite Piston– Grams of frictionGrams of friction

Picture from www.airpot.com

PneumaticsPneumatics

AccumulatorAccumulator– Pressure vesselPressure vessel– Adds volume to systemAdds volume to system– Helps keep pressure constantHelps keep pressure constant

Picture from www.bimba.com

PneumaticsPneumatics

Questions?