热传技术术语和定义

(Acrylonitrile-Butadiene-Styrene) An amorphous thermoplastic polymer with high impact resistance, heat performance, and surface qualities.
（丙烯腈-丁二烯-苯乙烯）一种无定形热塑性聚合物，具有高抗冲击性、热性能和表面质量。

Acrylic PSA
Acrylic based pressure sensitive adhesive.  This type of adhesive has great chemical resistance and functions well in high temperature applications. It works best in long term adhesion applications.

丙烯酸酯压敏胶

丙烯酸基压敏粘合剂。这种类型的粘合剂具有很好的耐化学性，并且在高温应用中功能良好。它在长期粘合应用中效果最好。

Adhesive Tapes
Pressure Sensitive Adhesives (PSA), double and single–sided, acrylate, rubber or silicone based, carrier-free transfer adhesive or with carrier material, such as foam, non-wovens, foil or fabric.

胶带

压敏粘合剂（PSA），双面和单面，丙烯酸酯、橡胶或硅树脂基，无载体转移粘合剂或带有载体材料，如泡沫、非织造布、箔或织物。

AEM
(Eethylene Acrylic Elastomer ) synthetic or natural polymers with elastic qualities composed of ethylene and acrylic monomers.
（乙烯丙烯酸弹性体）由乙烯和丙烯酸单体组成的具有弹性的合成或天然聚合物。

Alkali Metal Heat Pipe
Heat pipe that uses alkali metal as working fluid. Alkali Metal Heat Pipes are typically used for high temperature (300°C to 2,000°C) applications.

碱金属热管

使用碱金属作为工作流体的热管。碱金属热管通常用于高温（300°C至2000°C）应用。

AlSiC
Aluminum silicon carbide.

AlSiC

铝碳化硅。

APG
Advanced pyrolytic graphite.

先进的热解石墨。

Axially-Grooved Heat Pipe
Heat pipe that uses extruded axial grooves in the internal wall as the wick material.

轴向开槽热管

热管，在内壁上使用挤压轴向凹槽作为芯材。

BEF
Brightness Enhancement Film
亮度增强膜

BLT
Bondline Thickness, typically used too describe the thermal interface material thickness between applied surfaces
粘结线厚度，通常也用于描述应用表面之间的热界面材料厚度

BLU
Backlight Unit
背光板模组

Breathable PU film
Moisture-regulating germ barrier for wound care products.
用于伤口护理产品的水分调节细菌屏障。

Butt Cut
A type of rotary die cutting which works only with square corner parts. Parts are cut to the liner, leaving no gap between each part, and cut through liner for slug removal.

对接切割

一种仅适用于直角零件的旋转模切。零件被切割到衬管上，每个零件之间不留间隙，并切割穿过衬管以去除段塞。

C4
Command, Control, Communications, Computers.

C4

指挥、控制、通信、计算机。

CAD
Computer-Aided-Design software programs.

计算机辅助设计

计算机辅助设计软件程序。

Capillary Pumped Loop
Capillary action generated by fine porous wick material located only in the evaporator provides pressure head needed to circulate fluid through entire system. Vapor and liquid move in the same direction in a loop, rather than in counterflow, as in conventional heat pipes.

毛细管泵送回路

仅位于蒸发器中的细孔芯材料产生的毛细管作用提供了使流体循环通过整个系统所需的压头。蒸汽和液体在回路中以相同的方向移动，而不是像传统的热管那样以逆流的方式移动。

Carrier
The backing material that carries adhesives & separates adhesives coatings.

载体

承载粘合剂和分离粘合剂涂层的背衬材料。

CCFL
Cold Cathode Fluorescent Lamp
冷阴极荧光灯

Cd/m2
Candelas per square meter
坎德拉/平方米

Cellular materials
Cellular rubber and foam rubber, Polyethylene (XLPE), Polyimide (PI), Ethylene Propylene Diene Monomer (EPDM), Polyvinyl Chloride (PVC) and Polyurethane (PU) foams, silicone foam, blended cellular sponge/rubber formulations.

蜂窝材料

泡沫橡胶和泡沫橡胶、聚乙烯（XLPE）、聚酰亚胺（PI）、三元乙丙橡胶（EPDM）、聚氯乙烯（PVC）和聚氨酯（PU）泡沫、硅酮泡沫、混合泡沫海绵/橡胶配方。

CFM
Cubic Feet per Minute - flow rate
立方英尺/分钟-流速

Cleanroom
An isolated area with provisions to restrict contamination in the manufacturing process to preserve the quality of the manufactured product. Cleanrooms are classified by the number of particles per cubic meter at a predetermined molecule measure. They can be anywhere from Class 1 to Room Air. Typical applications range from Medical wearables, devices, and disposables, to optical films, and precise electronics like smartphones.

洁净室

一个隔离区域，其规定限制制造过程中的污染，以保持制造产品的质量。洁净室是根据预定分子尺度下每立方米的颗粒数量进行分类的。它们可以在从一班到室内空气的任何地方。典型的应用范围从医疗可穿戴设备、设备和一次性用品，到光学薄膜和智能手机等精密电子产品。

Cleavage Strength
The force required to break the adhesive bond between adhesive and substrate when the pull is being applied to one end of the joint and the other end of the joint has no stress.

劈裂强度

当拉力施加到接头的一端而接头的另一端没有应力时，打破粘合剂和基底之间的粘合剂结合所需的力。

Closed-Cell Foam
A type of foam whose cell structure is made of uniform cells that retain their shape and prevent air from passing through. Closed-Cell Foam is great for insulating and tends to be more rigid and dense than open-cell foams.

闭孔泡沫

一种泡沫，其泡孔结构由均匀的泡孔组成，保持其形状并防止空气通过。闭孔泡沫非常适合隔热，而且往往比开孔泡沫更坚硬、更致密。

CMM
Coordinate Measuring Machine

CMM

坐标测量机

Cold Plate
A plate used to transfer heat and cool electronics. See Liquid Cold Plate.

冷板

一种用于传递热量和冷却电子设备的板。参见液体冷板。

Composite materials
Multi-layer insulation material, polyester film, non-woven polyester or chipboard combinations, chipboard-PET-chipboard.

复合材料

多层绝缘材料，聚酯薄膜，无纺布聚酯或刨花板组合，刨花板PET刨花板。

COTS
Commercial Off The Shelf.

CP
Cold Plate

CR
(Chloroprene Rubber) A synthetic rubber with excellent flame resistance, good chemical stability, and usefulness over a wide temperature range.
（氯丁橡胶）一种合成橡胶，具有优异的阻燃性、良好的化学稳定性和在宽温度范围内的用途。

CTE
Coefficient of Thermal Expansion.

热膨胀系数。

CTE Matching
Coefficient of Thermal Expansion (CTE) matching involves harmonizing the materials of a heat source and heat sink to ensure that as temperature changes the devices expand and contract such that mechanical stresses are not induced to cause failure.

CTE匹配

热膨胀系数（CTE）匹配涉及协调热源和散热器的材料，以确保随着温度的变化，设备膨胀和收缩，从而不会引发机械应力而导致故障。

CVD
chemical vapor deposition.

化学气相沉积

化学气相沉积。

DBEF
Dual Brightness Enhancement Film

双亮度增强膜

DI Water
Deionized Water
去离子水

Die
A tool usually made of metal with a design utilized to cut or shape materials.
一种通常由金属制成的工具，其设计用于切割或成型材料。

Die Casting Mold
A closed vessel into which molten metal is injected under high speed and pressure.

压铸模具

一种封闭的容器，在高速高压下将熔融金属注入其中。

Die Cutting
A manufacturing process of converting low-strength materials with a die (tool like a cookie cutter). Die cutting can be done with flatbed & rotary presses.

模切

一种用模具（类似饼干刀的工具）转换低强度材料的制造过程。模切可以用平板和旋转压力机进行。

dP, ΔP, or delta P
Pressure Drop between two points in a flow path, typically before and after a flow resistance like a heat sink or liquid cold plate.
流动路径中两点之间的压降，通常在散热器或液体冷却板等流动阻力之前和之后。

dT, ΔT, or delta T
Temperature difference between two points, typically between a hot spot and heat sink.
两点之间的温差，通常是热点和散热器之间的温差。

Dual Tabs
The use of two peel tabs, also known as pull tabs, placed on the top and bottom layer of the part. Dual tabs are a great way to improve assembly efficiencies and lower costs for the end user. Tabs can be designed into the part within the converting process or added on to the part manually.

双标签

使用两个剥离片，也称为拉片，放置在零件的顶层和底层。双接线片是提高组装效率和降低最终用户成本的好方法。选项卡可以在转换过程中设计到零件中，也可以添加到零件上

EMC
ElectroMagnetic Control

电磁控制

EMI
ElectroMagnetic Interference
电磁干扰

EGW
Ethylene Glycol based Water Solution
乙二醇水溶液

Elastomer
A material that is both viscous and elastic, making them compliant and maleable which is ideal for sealing and damping solutions.

弹性体

一种既有粘性又有弹性的材料，使其具有柔顺性和可破坏性，是密封和阻尼解决方案的理想选择。

Elastomers & rubber
Ethylene Propylene Diene Monomer (EPDM), Nitrile Butadiene Rubber (NBR, Buna-N), Natural Rubber (NR), Styrene-Butadiene Rubber (SBR), Neoprene Rubber (CR), Fluoroelastomers (FKM), Silicone (Viton), Masticated Rubber.

弹性体和橡胶

三元乙丙橡胶（EPDM），丁腈橡胶（NBR，Buna-N），天然橡胶（NR），苯乙烯-丁二烯橡胶（SBR），氯丁橡胶（CR），氟弹性体（FKM），硅橡胶（Viton），胶合橡胶。

Elongation
The point at which a material stretches before it breaks. It is usually expressed as a percentage of the initial strength.

伸长率

材质在断裂之前拉伸的点。它通常表示为初始强度的百分比。

Embedded Heat Pipe
Heat pipe that is integrated into a solid material such as copper or aluminum to enhance the effective thermal conductivity of the solid material.

嵌入式热管

集成到固体材料（如铜或铝）中以提高固体材料的有效导热性的热管。

EMI/RFI shielding material
Fabric-Over-Foam (FOF), gasket material, electrically conductive adhesive tape and coated polyester fabric.

BOYD LECTROSHIELD - Conductive Foams

BOYD LECTROSHIELD - EMI Absorbers

EMI/RFI屏蔽材料

BOYD LECTROSHIELD-泡沫织物（FOF）、垫圈材料、导电胶带和涂层聚酯织物。

Extruding
A high-volume manufacturing process to make long products by pushing a material, raw plastic or metal, through a die with a specific cross-section.

Fabric/fibre materials
Filter materials, reticulated foam, non-wovens, felts.

Non-woven: Inexpensive, disposable product with absorbent properties.

Silver fabrics: Germicidal, anti-microbial effect in wound care and cosmetic products.

FDA
Food and Drug Administration

FEM
Finite Element Method.

Fin Density
Fins per unit length

FKM
(Fluorocarbons/Fluoroelastomers)  A fluorinated rubber with excellent flame and heat resistance.

Flatbed Die Cutting
A  precision converting process that cuts a design by pressing a die into a sheet of material in a jaw like motion. This technique is commonly used in low-volume order because of low tooling costs. Production is slower in a flatbed that in a rotary press.

FLB
Fluid Lubricant Bearing

Flexible Heat Pipe
Heat pipe that includes a flexible section between the evaporator and condenser. The flexible section can be made of a bellows or other flexible structure.

Flux Density
Heat load per unit area (W/cm2).

Foam
A soft cellular material created by gas pockets in the base material. Typically made with compliant elastomers like rubber to create conformable seals or dampers.

FOD
Foreign Object Debris

FPI
Fins Per Inch - fin density

Fuel Cell
A system that combines hydrogen and oxygen to produce electricity.

Galvanic Corrosion
Metal corrosion when ions from one metal pass through an electrolytic fluid and corrodes a secondary metal. A common concern with Liquid Cooling Systems, especially those that contain both copper and aluminum.

Glass Transition Temperature
The temperature when an amorphous material, like rubber or plastic, transitions from a hard and semi-brittle to a more viscous, "glass-like" state.

Glycol/Water
A mixture of water and propylene glycol, an antifreeze that lowers the freezing point of water.

GN2
Gaseous nitrogen

Graded Wick Structure
A wick structure that has spatially varying wick properties.

Graphene
A single layer of graphite, pure carbon sheets.Graphite
One of the 3 versions of pure carbon. Molecules are arranged in sheets which allow for high planar conductivity compared to its through plane conductivity. Often used for heat spreading.

Head-Capacity
Pressure versus Flow

Heat-conducting material
TransTherm silicone and silicone free insulating foil, gap fillers, phase change material and adhesive tapes; flexible graphite solutions.

Heat Exchanger
A device built for efficient heat transfer from one medium such as air or liquid to another, whether the media are separated by a solid wall so that they never mix, or the media are in direct contact. Heat exchangers are typically used for enclosure cooling and can be of the following type: air-to-air, liquid-to-air, or liquid-to-liquid.

Heat Pipe
A device that transports heat through the evaporation and condensation of a working fluid (i.e., two-phase cooling). Heat pipes are devices that have an extremely high effective thermal conductivity, typically 10 to 10,000 times more conductive than solid materials.

Heat Pipe Heat Spreader
A plate that utilizes heat pipes to improve thermal conductivity and to move heat and cool electronics. Heat pipe spreaders are passive and increase the conductivity of the base material significantly.

 Heat Sink
A heat sink (or heatsink) is an environment or object that absorbs and dissipates heat from another object using thermal contact (either direct or radiant). Heat sinks are used in a wide range of applications wherever efficient heat dissipation is required; major examples include refrigeration, heat engines, cooling electronic devices, and lasers.

Heat Spreader
A heat spreader is a device having high thermal conductivity to move heat from a concentrated or high heat flux source (high heat flow per unit area), to a heat exchanger with a larger cross sectional area, surface area and volume. Heat spreaders can be solid conductors like copper or pyrolytic graphite, or they can be a two-phase device like heat pipes and vapor chamber heat pipes.

Heat-Conducting Material
TransTherm silicone and silicone free insulating foil, gap fillers, phase change material and adhesive tapes; flexible graphite solutions.

Heavy Rail
High passenger volume multi-car subway system.

High-pressure gasket material
Non-asbestos fibre, Graphite, Aramid fibers with a nitrile binder

HX or HEX
Heat Exchanger

Hybrid Electric
Engine drives a generator for electric propulsion.

Hydrogels & Hydrocolloids
Skin-friendly adhesive for stoma products or electrodes.

Hydrophilic Polyurethane (PU) Foam
Wound care products for the optimizing of the wound environment.

I/O
Input/Output

ID
Inner Diameter, typically for O-Rings, Hoses, and Tubes.

IGBT
Insulated Gate Bipolar Transistor.

ISO
International Standards Organization

Isothermal Furnace Liner (IFL)
An annular heat pipe that is typically operating at high temperature (>300°C) to keep the hot zone of a furnace at uniform temperature or isothermal. IFLs typically utilize alkali metals such as cesium, potassium, sodium or NaK as the working fluid. Typical applications include crystal growth, temperature calibration, etc.

ITD
Initial Temperature Difference

ITO
Indium Tin Oxide

k-Core^®.CFC
k-Core^® with carbon fiber composite encapsulant.

Kiss Cut
A type of rotary die cuttings for all shapes. Parts are cut to a liner, leaving a small gap between each part, and cut through liner for slug removal.  Finished parts are provided on a roll, since the liner is left untouched.

Laminating
The process of joining two or more materials utilizing pressure sensitive adhesives. Typically done by rolling materials together with an adhesive layer to bond them.

LAMPS
Light Airborne Multipurpose System.

LCD
Liquid Crystal Display

LCP
Liquid Crystal Panel

LCP
Liquid Cold Plate

LCS
Liquid Cooling System

Light Rail
Street level two-car transit rail systems.

Liner
A flexible material, usually plastic based, which carries a release agent. This is used to help protect the functional material or adhesive during transport and assembly and is ultimately removed prior to completing the final product.

Liquid Cold Plate
A plate that utilizes pumped liquid to move heat and cool electronics. Liquid cold plates are often machined and/or vacuum brazed with connectors for the liquid inlet/outlet ports.

Liquid Cooling System
A system used to remove heat by circulating a single-phase liquid using a pump and liquid-to-air heat exchanger. As opposed to air cooling, a single-phase liquid is used as the medium for transferring the heat. A water-based coolant is commonly used for cooling electronics, internal combustion engines in automobiles and large electrical generators.

LN2
Liquid Nitrogen

Loop Heat Pipe
A two-phase heat transfer device that uses capillary action to remove heat from a source and passively move it to a condenser or radiator. LHPs are similar to CPLs but have improved startup characteristics.

Medical Grade Adhesives
Adhesive tested for appropriate use in medical applications. These types of adhesives can range from skin contact tapes to one-time disposables, and repeat-use disposables.

Nanoscale Wick
A wick that is constructed of nano-sized structures for improved capillary pressure generation.

NPSH
Net Positive Suction Head. In reference to pump performance.

NPT
National Pipe Thread. Standard set of geometries used for pipe threads.

OCAs
Optically Clear Adhesives

OD
Outer Diameter, typically for O-Rings, Hoses, and Tubes

OEF
Optical Enhancement Film

OIT
Operator Interface Terminals

Open-Cell Foam
A type of foam whose cell structure is made of irregularly shaped cells linked together that allow air to fill the space. Open-cell foam is great for acoustic dampening and tends to be more light-weight and pliable than closed-cell foams.

Optically Clear Adhesive
(OCA) A specialized high transparent adhesive used to bond applications that require superior clarity.

O-Ring
An elastomeric seal with a circular "O" shaped cross section.

O-Ring materials
For more information on the various O-Ring compounds visit our O-Rings website here.

PA
(Nylon) A thermoplastic polyamide with excellent elasticity, tenacity, and abrasion resistance.

PAO
Polyalphaolefin

PC
(Polycarbonate) An amorphous thermoplastic polymer with excellent dimensional stability and high translucency.

PDP
Positive Displacement Pump

PE
(Polyethylene) A thermoplastic with good low-temperature characteristics.

Peel Strength
The strength of an adhesive adhering two substrates together.

Peel Tab
Also known as a pull tab. A small piece of liner designed to facilitate the easy removal of a part from its backing liner. Peel tabs are a great way to improve assembly efficiencies and lower costs for the end user. Tabs can be designed into the part within the converting process or added on to the part manually.

PET
Polyethylene Terephthalate. See Plastic.

PET
(Polyethylene Terephthalate)  A thermoplastic polymer with excellent electrical insulating properties.

PG
Pyrolytic Graphite (PG)

PGS
Pyrolytic Graphite Sheets (PGS)

PGW
Propylene Glycol based Water Solution, typically used in liquid cooling and chiller applications.

PIA
Preferred Input Angle

PID
Proportional–Integral–Derivative - For Controllers

Plastic Deformation
Geometric deformation that is not reversed by the removal of the force that initially deflected the part. Plastics first undergo elastic deformation, which can be reversed, then plastic deformation which permenately changes the shape.

Plastics
A type of malleable large polymer molecules typically molded or extruded in a wide array of shapes.

PLC
Programmable Logic Controllers. Electronics that help control components like fans and pumps within complex systems like Liquid Cooling Systems.

PMMA
Polymethyl Methacrylate

Polyalphaolefin (PAO)
A highly purified ethylene derivative used as a cooling medium in liquid cooling systems.

Polyesters
A category of polymers with good strength and tenacity. Polyesters can be synthetic and organic.

Polymer
A large molecule or macromolecule with repeating sequences that can determine a broad range of chemical and phsysical characteristics, making them ideal for manufactured goods. See Plastics

Power Modules
Integrated modules of power switching devices.

PP
(Polypropylene) A thermoplastic polymer with high chemical resistance.

ppm/K
Thermal expansion in parts per million per K (e.g. micron/meter/Kelvin).

Pressure Sensitive Adhesive
An adhesive that bonds to a substrate upon contact. This type of adhesive cannot be repositioned once pressure is applied. A common type of adhesive that comes in a variety of peel and sheer strengths and formulated for specific substrates based on their surface energy.

PS
(Polystyrene) A thermoplastic polymer with excellent transparency and high tensile strength.

PSA
Pressure Sensitive Adhesive

PTFE
Polytetrafluoroethylene

PU
(Polyurethane) Great material for acoustical and shock absorption.

PVC
(Polyvinyl Chloride) A lightweight thermoplastic polymer with high chemical resistance and good insulation properties.

Pyro-shock
Shock caused by explosive devices for space deployment.

QDC
Quick Disconnect Couplings

Rafted
Mounting a device on shock absorbers to limit loading.

Rails
Thermal mass or masses at the edge of thermal cores or spreaders.

Ram Air
Increasing ambient pressure by using airflow of a moving object or vehicle to ultimately improve the performance of a component or system. Used in turbine engines.

REDI
Ruggedized Enhanced Design Implementation

Release Liner
A coated sheet that prevents a sticky substrate from adhering until the adhesive needs to be applied.

Remote Dissipation
Moving heat from a concentrated heat source to a location where that heat can be dissipated and managed more effectively.

RoHS
Restriction of Hazardous Substances

Rotary Die Cutting
A  precision converting process that cuts a design using a cylindrical die on a rotary press. This technique is commonly used in high-volume orders because of high speed, and high accuracy. Great for multilayered products.

RTD
Resistance Temperature Detectors, Thermocouples

SAE
Society of Automotive Engineers

Score Slitting
The process of partially cutting a substrate by using force to push a blade.

Shear Strength
The force required to break the adhesive bond between adhesive and substrate when the pull is parallel to the surface to which the adhesive was attached to.

SiC
Silicon Carbide device.

Silicone PSA
A silicone-based, pressure sensitive adhesive. This type of PSA has excellent high temperature use and chemical resistance.

Slitting
The process of cutting a roll of material into a specific width or into smaller rolls.

Socket
CPU/GPU Socket

SOLIMIDE®
A high-performance polyimide foam developed by NASA for the space shuttle program. SOLIMIDE® foam has an open-cell structure, and features lightweight, thermal, and acoustic properties.

Steel-Rule Die Cutting
A precision converting process that uses a flatbed die made from hard and sharp steel. Dies are made specifically for each part and used for shorter production runs compared to rotary die cutting.

STP
Standard Temperature and Pressure

Substrates
The base layer material on which other materials are applied to.

Surface Energy
The degree of pull or push force of a substrate’s surface exerts on another. The higher the surface energy, the greater the molecular attraction, which allows the adhesive to flow and create a stronger bond. The lower the surface energy, the weaker the attractive forces, which limits the adhesive from flowing and creates a weaker bond.

T/R Module
Transmitted/Receiver module for phased arrays.

Tack
A measurement of how quickly a bond is formed between a pressure sensitive adhesive and substrate under light pressure.

Tape Backing
A type of carrier that holds tape and protects adhesive from environment.

Tensile Strength
The force required to break the adhesive bond between adhesive and substrate when the pull is equal through out the entire joint and perpendicular to the surface which the adhesive was attached to.

Thermal Circuit
Thermal resistance path between heat load and sink.

Thermal Plane
A plate to cool electronics.

Thermoplastics
Plastics and foils, such as: Acrylonitrile Butadiene Styrene (ABS), Hard Polyvinyl Chloride (HPVC), Polyethylene (PE), Polycarbonate (PC), Polyamide (PA), Polyethylene Terephthalate (PET), Polymethyl Methacrylate (PMMA), Polyoxymethylene (POM), Polypropylene (PP), Polystyrene (PS), Polytetrafluoroethylene (PTFE), Polyurethane (PU), Polyimide (PI), Polyether Ether Ketone (PEEK), Polyethylene Naphthalate (PEN).

Thermosetting plastics
Phenolic resin paper laminate, fabric-base laminate, polyester glass mat, vulcanized fibre.

Thermosyphon/Thermosiphon
A heat pipe that relies on gravitational forces to return the liquid back to the evaporator. Thermosiphons typically have no wick.

Thin Vapor Chamber
A vapor chamber with a thickness less than 3mm or 0.118 inches, basically the thickness of a credit card. See vapor chamber.

TIR
Total Internal Reflection

TMA
Tower Mounted Amplifier

Touch Temperature
Maximum allowable surface temperature that may come in contact with a user. See Aavid Genie Blog Post

TPE
(Thermoplastic elastomers) A mixed rubber composed of copolymers and polymers with both thermoplastic and elastomeric properties.

TPG
Thermally Annealed Pyrolytic Graphite (TPG)

Transfer Tapes
Tapes without backing material. Just adhesive on a liner.

TransTherm^™
TransTherm^™ Catalog [PDF]

TransTherm^™ Silicone & Silicone-Free Thermal Pads Material [PDF]

TTT k
Through-the-thickness conductivity.

Vapor Chamber
A flat or planar heat pipe that allows three-dimensional spreading of heat with an extremely high thermal conductivity. Vapor chambers are typically used as the base of a heat sink. Vapor chambers deliver higher thermal performance than a traditional heat sink by alleviating spreading resistance found in solid heat sink construction. Vapor chambers are typically constructed of stamped or machined plates with a hollow center for vapor flow.

TXV
Thermostatic Expansion Valve

Vapor Chamber
A flat or planar heat pipe that allows three-dimensional spreading of heat with an extremely high thermal conductivity. Vapor chambers are typically used as the base of a heat sink. Vapor chambers deliver higher thermal performance than a traditional heat sink by alleviating spreading resistance found in solid heat sink construction. Vapor chambers are typically constructed of stamped or machined plates with a hollow center for vapor flow.

Vapor Tower
A vapor tower heat pipe is a combination of a vapor chamber and vertical heat pipe. A vapor tower not only can spread heat like a vapor chamber in the x-y plane, but also transfers heat in the z-plane to heights much greater than 12mm or 0.5 inches.

Variable Conductance Heat Pipe (VCHP)
A variable conductance heat pipe is a heat pipe with a fixed charge of inert gas such as Argon or Helium used in applications requiring tight temperature control. Variable conductance heat pipes employ a large reservoir of inert non-condensable gas attached to the condensing section. The gas partially occupies the condenser as well, so changes in the pressure or temperature of the gas cause a change in its volume, allowing more or less condenser area to be active; this has a regulating effect on the operating temperature of the VCHP.

VME
Standard commercial card format - IEEE 1101.2.

W/m·K
SI units for conductivity Watts/(meter·Kelvin).

Water Jet
A converting tool, in which the cutter is commonly connected to a high-pressure water pump - water is ejected from a nozzle at high pressure, cutting through the material. Waterjets are ideal for prototyping and can cut many types of materials.

Web/Webbing
Continuous rolls of thin, flat materials used in rotary converting

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