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Topic: Heat sink


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In the News (Tue 16 Jul 19)

  
  Method of making a heat sink - Patent 5215140
Heat sinks commonly are attached to electronic devices (e.g., integrated circuits) to dissipate the heat which the devices generate during operation.
In order to do this, the heat sinks are designed to have a maximum surface area, the size of which determines their heat dissipating capacity, while still occupying the smallest possible volume so that the heat sink takes up as little usable space as possible in the electronic assembly.
Some heat sinks, including the pin fin types, are fabricated using conventional die casting techniques in which a reusable steel mold containing cavities that correspond to the fins or pins of the heat sink is filled with molten metal such as zinc or aluminum.
www.freepatentsonline.com /5215140.html   (1366 words)

  
 Circuit package with membrane, containing thermoconductive material, ruptured against a heat sink - Patent 4546410
Upon mounting of the circuit package to the heat sink, the membrane means ruptures, and the thermoconductive material, such as silicon grease, is automatically spread along the interface of the circuit package and the heat sink to enhance heat transfer.
A circuit package mounted against a heat sink and having membrane means, containing thermoconductive material, and rupturing against said heat sink to spread said thermoconductive material along the interface of said circuit package and said heat sink to enhance heat transfer from said circuit package to said heat sink.
The package is mounted to a heat sink such that the heat generated by the circuitry is transferred through the substrate to the heat sink, for example as shown in Kaufman U.S. Pat.
www.freepatentsonline.com /4546410.html   (1384 words)

  
  Benchtest.Com - Heat Sink Overkill
The height of the sink and fan cause the air flow to the heat sink to be somewhat reduced.
Visible on the left of the heat sink is one of the springs that hold the heat sink to the processor socket.
I'm sure that by using a more massive heat sink or one with more fins, I could have brought the temperature down even more, but all I was looking for was a system that ran cool enough not to be dangerous to the CPU and allow me to start testing case cooling configurations.
www.benchtest.com /way2cool2.html   (1066 words)

  
 Processor Cooling
Heat sinks that attach using clips should normally be used with heat sink compound to ensure proper heat transfer.
When clips are used, heat sink compound should be placed between the processor and the heat sink to ensure good thermal conductivity and hence proper cooling of the processor.
Heat sinks operate by conducting heat from the processor to the heat sink and then radiating it to the air.
kmh.yeungnam-c.ac.kr /PcNcMicro/cpu/char/cool-c.html   (2214 words)

  
 Temperature heat sink for damping cartridge (US6142497)
The heat dissipating arrangement includes a heat sink, which, in a preferred embodiment, has a substantially cylindrical body and radially extending heat sink fins.
The heat sink is either positioned over or around a damping cartridge or other damping system containing damping fluid or is formed as the damping cartridge itself.
Preferably, the heat sink is positioned within the inner fork tube of a suspension fork with the heat sink fins in close proximity, and preferably contacting, the inner wall of the inner fork tube.
www.delphion.com /details?&pn=US06142497__   (298 words)

  
 Heat Sink
There are different types of heat sinks available and that too in many shapes and sizes.
The heat sink is usually made of the material that can absorb heat like that of aluminum.
The heat sink absorbs the heat and the fan blows away the heat.
www.ligaturesoft.com /cheap-computers/heat-sink.html   (188 words)

  
 What is heatsink? - a definition from Whatis.com - see also: heat sink
- A heatsink is a device that is attached to a microprocessor chip to keep it from overheating by absorbing its heat and dissipating it into the air.
The heatsink may be held in place on the microprocessor by a clip.
To ensure that the heatsink can absorb as much heat as possible, thermal grease is used to create a seal between the two devices.
searchsmb.techtarget.com /sDefinition/0,,sid44_gci815999,00.html   (322 words)

  
  Icepak - News - Icepak Articles - Understanding Advanced Heat Sink Design: Augmented-Fins Improve Cooling with Reduced ...
Newer types of heat sink, known as augmented-fin designs, address this problem by staggering the fins and placing the downstream leading edge of each fin section in the exact center of the air channel, maintaining a constant cross-sectional area for the air to move through the heat sink.
In this case, all the heat sink dimensions are identical except for the shape of the fins in the airflow channels.
Heat sinks cooled by forced air are limited by a heat transfer coefficient at each fin, which controls convective heat removal to the air stream.
www.icepak.com /prod/icepak/solutions/articles/iceart2.htm   (2108 words)

  
 HEAT SINK - Definition
/heet sink/ (from "sink", electronics jargon for something which takes in current) A piece of thermally conductive metal attached to a semiconductor or other electronic device and designed to prevent it from overheating by conducting heat away from it and radiating it to the environment.
Heat sinks often have fins to increase their surface area.
Heat sink compound can be smeared between the device and the heat sink to improve thermal conduction.
www.hyperdictionary.com /dictionary/heat+sink   (83 words)

  
 Heat Sink Operation
Heat sinks aren't just for stopping the expansion of metals, they are instrumental in whisking heat away from devices that are very sensitive to heat problems.
The heat flows from the chip to the large heat sink (which might be cooled by air from a fan.) Powerful super computers might have liquid-cooled heat sinks that the chips are bonded to.
The heat capacity of a piece of metal depends not only on how large it is (large objects tend to be harder to change the temperature of), but also what kind of metal it is. Aluminum for example, takes a lot more energy to heat up than copper or iron.
www.newton.dep.anl.gov /askasci/eng99/eng99370.htm   (1261 words)

  
 HEAT SINK
Heat sinks are used to carry away heat from central processors (CPUs) or in any electrical/electronic circuit for that matter.
CPUs generate a lot of heat and this needs to be quickly removed since excessive heat has a detrimental effect on the CPU performance and its life and in extreme cases may even cause a meltdown.
Air-cooled heat sinks can be of bonded fin type, extruded or copper and liquid-cooled heat sinks can be of liquid-cooled plates or cold plates.
www.partminer.com /glossaryhtml/heat_sink.html   (325 words)

  
 The Arctic as a Heat Sink
Most of the heat gain occurs in low latitudes, and this gain is balanced (on average) by heat loss that takes place at latitudes north and south of about 40 degrees.
Therefore the Arctic is said to act as a "heat sink" for energy that is transported from lower latitudes by ocean currents and by atmospheric circulation systems.
Sensible heat is transported poleward during the exchange of air masses from the tropics to the middle and high latitudes.
www-nsidc.colorado.edu /arcticmet/patterns/heat_sink.html   (169 words)

  
 Therma-Base Vapor Chamber Heat Sink Thermal Solution
Heat sinks are most efficient when there is a uniform heat flux applied over the entire base.
The brute force approach to overcoming spreading resistance is to increase the size of the heat sink, increase the thickness of the base, increase the airflow, or decrease the incoming air temperature.
As in a heat pipe, the thermal resistance associated with the vapor spreading is negligible, providing an effective means of spreading the heat from a concentrated source to a large surface.
www1.thermacore.com /thermabase.htm   (528 words)

  
 Extrusion Heat Sink
Heat flows between regions that are not in thermal equilibrium; in particular, it flows from areas of high temperature to areas of low temperature.
Total heat, heat transfer rate, and heat flux are all notated with different permutations of the letter Q. They areoften confusingly switched in different contexts.
In plumbing, a sink is a bowl-shaped fixture, usually made of porcelain (or, especiallyin the kitchen, stainless steel), that is used for washing hands orsmall objects such as dishes, nylons, socks or underwear.
www.altvetmed.com /face/7919-extrusion-heat-sink.html   (908 words)

  
 Heat sink designs for solid state relays
Adequate heat sinks, including consideration of air temperature and air flow, are essential to the proper operation of a solid state relay (SSR or SCR or IGBT package).
The heat sink that we have installed as part of that assembly will properly dissipate that heat rise, when the D family is installed in a 40 degree C environment, where the air flow is unblocked.
Heat transfer is affected by the thickness of the thermal compound, uniformity of application and how firmly the relay is attached to the heatsink.
www.power-io.com /library/appnotes/heatsink-info.htm   (2283 words)

  
 Thermal Management Forum: How to Design a Heat Sink
Stamped heat sinks are made from a single sheet of metal, which is cut and bent to give the desired thermal properties.
Bonded-fin heat sinks are made by bonding fins, fabricated from sheet metal or through extrusion, to an extruded base.
Transfer from heat sinks to the environment may be due to convection or radiation.
www.embeddedtechnology.com /read/nl20000104/58654   (1889 words)

  
 Heat sink patent invention
Where liquid coolant is used, for example, the liquid is pumped through a block on the heat source where it becomes heated and the heated liquid is then pumped or otherwise moves, as by movement through a heat pipe, to a heat sink located at some distance from the block.
Once the heated liquid arrives at the heat sink, heat is conducted into the thermal plate and out into the fins where the heat is passed into a fluid such as an airflow passing through the fins.
The heat sink may include a first end, a second end, a duct extending along an axis into the heat sink, the duct opening at the first end of the heat sink and a plurality of fins arranged substantially annularly to define the duct with fin spaces between the fins opening into the duct.
www.freshpatents.com /Heat-sink-dt20060907ptan20060196637.php   (1081 words)

  
 Thermoelectric Heat Management - Heat Sinks KeyWords:(Cooler TEC Peltier)
A typical design parameter might be to limit the heat sink temperature rise above ambient to 10°C to 20°C. The heat sink temperature directly affects the cooler hot side temperature, which in turn affects the cold side temperature that can be achieved with a TEC.
Heat sink resistance is the measure of the ability of the sink to dissipate the applied heat and is given by:
Ambient temperature is 27°C, the desired rise across the heat sink is 10°C, or heat sink temperature at 37°C. The load that must be dissipated is 10W.
www.marlow.com /TechnicalInfo/thermoelectric_heat_management_.htm   (302 words)

  
 Heat sink: key information: Materials Co.,ltd.
Heat sinks are devices that enhance heat dissipation from a hot surface, usually the case of a heat generating component, to a cooler ambient, usually air.
In most situations, heat transfer across the interface between the solid surface and the coolant air is the least efficient within the system, and the solid-air interface represents the greatest barrier for heat dissipation.
A heat sink lowers this barrier mainly by increasing the surface area that is in direct contact with the coolant.
www.refractorymetal.net /eng/Heat-sink   (165 words)

  
 CPU coolers compared, page 6
The sink by itself weighs 430 grams, thanks to the hefty chunk of copper in the middle.
Boxed-in conventional aluminium heat sink, reasonably powerful fan, somewhat treacherous clip that has to be applied with a screwdriver, but doesn't make it easy.
They both have aluminium heat sinks of conventional design, capped by a 60mm full height fan with a plastic air-channelling lid over the small fin area that the fan itself doesn't cover.
www.dansdata.com /coolercomp_p6.htm   (3805 words)

  
 Aluminum Heatsinks Die Cast or Heat Sink Castings
Heat sinks die cast in aluminum remove heat from parts and components in electronic applications.
Aluminum die cast heat sinks are produced at the rate of 250 heat sink parts per day to 2,500 heat sink parts per day.
Aluminum heat sinks are die cast to save the cost of machining and they look better.
www.kineticdiecasting.com /heatsink.html   (502 words)

  
 Therma-Sink Heat Pipe Heat Sink Thermal Solution
Therma-Sink™ uses heat pipe technology to move the heat from an attachment plate at the heat source to a location within the package where enough air volume exists for adequate heat removal.
Fins are stacked on the heat pipes to provide adequate surface area for heat dissipation to the air.
The Therma-Sink™ example presented here is a forced convection heat sink designed to cool a processing module to 0.35°C per watt at 90 watts with 2m/s of air flow.
www1.thermacore.com /therma_sink.htm   (207 words)

  
 Peavey.com :: Heat Sink Technology
While spreading out the heat is desirable in passive cooling, once you move up to forced air, you often need to bring the heat sources closer together to better control the cooling.
By angling two heat sink extrusions toward each other, forming a truncated "V", the heat transfer is significantly increased at the narrow end.
The net result of tuning the heat sink for air temperature, the devices all operate at close to the same temperature and the amplifier will be able to do more work before the hottest power device gets too hot.
www.peavey.com /support/technotes/poweramps/heatsink.cfm   (723 words)

  
 Determining Heat Sink Efficiency Using Thermal Diode Temperatures
It is possible to use Intel's Thermal Diode found on its chips to estimate heat sink efficiency.
Heat sink efficiency, measured as Degrees in Centigrade / Watts (C/W), in this case is the temperature drop measured from the thermal diode in the CPU to ambient air temp.
The thermal resistance between the CPU core and the ambient temp is comprised of the resistance of the CPU core to its case top, the thermal grease between the case top and the heat sink base, and the heat sink itself.
www.overclockers.com /tips32   (595 words)

  
 How To Change Your Computer's Heat Sink -- iSnare.com Articles
Heat will destroy any computer component if not removed in time.And the CPU Chip is one of the main components of your system that produces heat.
The heat sink has the all important task of keeping the CPU Chip cool so it does not overheat.And there may be times when the heat sink will fail to perform its job and must be changed.
Changing the heat sink on your central processing unit or CPU chip is a simple job.And the best part is that you only need a small screwdriver,cotton swabs,and some rubbing alcohol.
www.isnare.com /?aid=75378&ca=Computers+and+Technology   (1385 words)

  
 EXTREME Overclocking - Tweaking PC Hardware To The Max
Copper is a great material for conducting heat, which means it can pull the heat off of your CPU faster than aluminum, however aluminum is a better material for dissipating heat.
Alpha has been applying this methodology for quite some time with their heat sinks having a thick copper base, but the rest of the heat sink is aluminum.
Another disadvantage is that these copper heat sinks generally cost more than their aluminum counterparts.
www.extremeoverclocking.com /reviews/cooling/Copper_HS_1.html   (733 words)

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