電子機器用熱管理材料
電子機器と確実な熱伝達のためのサーマルインターフェース材料
電子機器と冷却面の間に連続した熱経路を構築します。サーマルパッド、グリース、液状ギャップフィラー、パテ、相変化TIM、熱伝導接着剤を、熱伝導率だけでなく、実際のギャップ、組立荷重、生産工程に基づいて比較してください。.
Start With the Physical Joint
サーマルインターフェースマテリアルとは何ですか？
Thermal interface materials (TIMs) are materials placed between a heat-generating component and a heat sink, cold plate or housing to displace air in surface irregularities and gaps. They improve thermal contact and must be selected to suit the assembly’s mechanical and electrical requirements.
A surface that appears flat can still touch its mating surface only at scattered high points. The spaces between them restrict heat flow. A suitable TIM conforms to those spaces and creates a more continuous path. Its finished thickness and contact condition matter as much as the material itself.
A clamped processor cooler and a board with uneven component heights need different interfaces. Select by gap, contact and mounting conditions—not W/m·K alone.
Explore Haktak thermal material solutions for your electronics project. For the broader portfolio, including electronic adhesives, visit our products overview.
The TIM bridges the joint. It does not replace adequate cooling capacity, appropriate mounting hardware or electrical clearances.
Compare Material Families
Explore Thermal Interface Material Types
Start with the material family that fits your gap and assembly process. Then compare specific grades under your operating conditions.
サーマルパッドおよびギャップパッド
Cut parts simplify placement and define the contact footprint. Thickness and compression must accommodate the assembled minimum and maximum gaps without overloading the board or leaving an open interface.
Best fit: repeatable placement and a defined gap with a controlled compression window.
Explore thermal pads →
サーマルグリスとペースト
A controlled compound deposit can wet surface texture and spread into a thin layer under mounting load. It generally needs mechanical attachment and lifetime checks for movement, carrier separation and loss of contact.
Best fit: thin contact between nearly mating surfaces with stable mounting pressure.
Explore thermal grease →
液状ギャップフィラーおよびゲル
Dispensed material can follow uneven component heights and complex gaps. Confirm the supplied state, then control bead shape, quantity, assembly timing and any required cure.
Best fit: variable interfaces and local placement with limited assembly force.
Explore liquid gap fillers →
サーマルパテ
Soft, formable material can conform across uneven component heights without choosing a separate die-cut thickness for each location. The exact formulation determines whether it stays soft, sets or cures and how it can be removed.
Best fit: irregular local gaps where volume, retention and serviceability can be controlled.
Explore thermal putty →
相変化型熱界面材料（TIM）
Films or pre-applied layers offer convenient handling before activation. Their temperature-dependent softening can improve surface wetting, but activation conditions, maintained pressure and the final bond line need verification.
Best fit: thin clamped joints that can reach the required activation conditions.
Explore phase change TIMs →
熱伝導性接着剤
Where the thermal layer must also attach parts, a suitable adhesive can combine the functions. Surface preparation, cure, bond strength, thermal expansion mismatch and repair requirements become part of the selection.
Best fit: a bonded interface with defined strength and cure requirements.
Explore thermal adhesives →Narrow the Family Before the Grade
Choose a TIM by Gap, Load and Assembly Process
Record the real minimum, nominal and maximum assembled gap. Then check mounting load, electrical requirements and the process available on your production line.
A thin, clamped heat path
Consider grease or phase change TIM when the surfaces are reasonably flat and remain mechanically mounted. Check deposit mass, surface finish, activation where applicable and lifetime contact. A large stand-off cannot be solved simply by applying more paste.
Conform without excess load
Compare gap pads, dispensable fillers and putty for unequal component heights. Cut pads suit defined footprints; dispensing can reach complex component layouts. Evaluate force at the smallest gap and coverage at the largest—not just the nominal assembly.
Thermal contact plus bonding
If the interface must retain a component, define the bond function first. Adhesive selection adds cure, surface preparation and stress requirements. Do not assume a soft thermal compound can replace a structural bond or mounting fastener.
Compare Like Conditions
Compare Thermal Interface Materials
Compare the assembly requirements and key checks for each family. Confirm performance limits using the selected grade’s technical data.
| マテリアルファミリー | Suitable starting point | Assembly method | What to validate |
|---|---|---|---|
| Gap pad | Defined gaps and tolerance variation | Place a cut part; compress within its design window | Force, contact, final thickness and electrical margins |
| グリース／ペースト | Thin, flat, mechanically mounted contact | Print, stencil or dispense a controlled quantity | Coverage, squeeze-out, pump-out, bleed and aging |
| 液体ギャップフィラー | Mixed heights or complex local gaps | Dispense; mix or cure when required | Dosage, rheology, closure delay, voids and final state |
| Putty | Irregular gaps with controlled volume | Form or dispense according to the supplied formulation | Retention, migration, contact and removal procedure |
| 相変化TIM | Thin clamped contact with activation available | Place or pre-apply; activate under specified conditions | Activation, final layer, pressure and cycling stability |
| サーマルアドヘシブ | Heat-transfer joint that also needs attachment | Prepare, deposit, fixture and cure | Bond strength, stress, thermal performance and repair |
Build a Comparable Material Brief
重要な熱伝導材料（TIM）の仕様
Compare candidates against these six requirements—not a single headline value.
Gap and active contact area
Record minimum, nominal and maximum assembled gaps, contact area and final thickness. Confirm coverage at the largest gap and safe load at the smallest.
Resistance with test conditions
Compare thermal data at matched thickness, pressure and temperature. Record units, test method and whether contact resistance is included.
Force, compliance and retention
Define safe mounting load and check force across the actual gap range. Verify component stress and material retention—not hardness alone.
Isolation in the finished joint
Request grade-specific electrical evidence at the intended thickness. Check cut edges, puncture risk and clearances in the finished assembly.
Delivered state and working window
Confirm storage, packaging and placement or dispensing conditions. Specify mixing, cure or activation requirements where applicable, including line stops.
Compatibility and serviceability
Define service exposure and acceptable thermal drift, movement and residue. Validate nearby-surface compatibility and the removal or replacement procedure.
Look Beyond Thermal Conductivity
Thermal Interface Material Performance Beyond W/m·K
Installed thermal resistance depends on the material layer and the contact at both surfaces—not conductivity alone.
One heat path. Three resistance terms.
tFinal layer thickness
kThrough-plane conductivity
AEffective heat-transfer area
Simplified one-dimensional model; R is in K/W with SI units. Package and cooler spreading resistance are excluded. Area-normalized impedance uses different units.
Final bond line
Keep the layer thin enough to limit resistance, but thick enough to fill the actual gap without dry regions.
Surface contact
Wetting, flatness and mounting pressure affect both boundaries. Compare data at loads the hardware can safely maintain.
電気的挙動
Verify the selected grade at its finished thickness, including cut edges, puncture risk and required clearances.
Service stability
Retest after representative cycling and dwell to confirm thermal contact, retention and any required rework performance.
Application-Led Screening
Thermal Interface Materials for Electronic Applications
Different applications place different demands on the thermal joint. Evaluate each material against the hardware, operating environment and service requirements.
Processors, GPUs and AI servers
Consider heat flux, mounting load, final layer and service access. Verify contact through repeated power cycles and cooler removal. Explore data center and AI applications.
Inverters and power modules
Evaluate heat transfer alongside isolation, package flatness and safe compression. Pay attention to fastener distribution and expansion mismatch at the complete module-to-cooler joint.
Controllers and sensor assemblies
Orientation, vibration, thermal cycling and cleanliness can dominate selection. Check nearby optics, contacts and bonding operations, plus the removal procedure if service is planned.
Boards and cooled enclosures
Mixed component heights and housing tolerances call for a realistic gap map. Verify coverage at every critical component and contact after long temperature dwell, not just first assembly.
Connect Selection to Manufacturing
Custom TIM Formats and Production Planning
Reliable placement turns material selection into a repeatable process. Define the supplied format, handling conditions and inspection method before moving to production.
Shape, liners and placement
Record the contact footprint, keep-outs, holes, thickness tolerance and required carrier. Check liner removal, part distortion and contamination during placement. The cut part must still provide safe edges and a complete thermal contact area.
Discuss your requirements for die-cutting and converting. Confirm the available format for your selected material.
Package, bead and line timing
Specify shot size, nozzle, pattern, material temperature, idle periods and container changeover. For curing grades, include mix requirements, open time and actual part temperature. Qualification should cover both the cold start and sustained operation.
See dispensing process support for planning the material and equipment together.
Test the Finished Interface
Validate the Complete Thermal Interface
Screen candidates with material data, then test them in representative hardware. Use the intended assembly settings and include worst-case tolerances.
基準を設定する
Record grade, deposit or cut-part dimensions, assembled gap, load and component temperature. Inspect coverage and define thermal, electrical and mechanical acceptance limits before exposure.
Test service conditions
Apply representative thermal or power cycling, dwell, orientation and vibration. Watch movement, carrier separation, voids and stress. Add humidity or vacuum screening only when required by the application.
Retest and inspect
Compare performance with the same method and limits. Inspect teardown condition and residue; verify cleaning, replacement quantity and remounting if rework is part of the service plan.
Start With Your Assembly Requirements
Request a Thermal Interface Material Recommendation
Share your drawing, gap range, heat load, cooling conditions, mounting pressure and electrical requirements. Include the production process and service environment so Haktak can review a suitable TIM family and the next validation steps.
Practical Engineering Answers
Thermal Interface Materials FAQ
サーマルインターフェースマテリアルは何をしますか？
It displaces air and improves contact between a heat source and a cooling surface. The benefit depends on coverage, finished layer thickness and the two contact boundaries, not just bulk conductivity.
What are the main types of thermal interface materials?
Common families include thermal pads, grease or paste, liquid gap fillers and gels, thermal putty, phase change TIMs and conductive adhesives. Graphite and insulating composites address additional spreading or electrical requirements.
Which TIM should I choose for my electronics?
Start with the assembled gap range and mounting load, then check electrical isolation, temperature, manufacturing and service requirements. Shortlist a family and validate specific grades in representative hardware.
熱伝導率は高ければ高いほど常に良いのでしょうか？
No. A higher-conductivity material may create more installed resistance if it forms a much thicker layer or contacts the surfaces poorly. Compare resistance or impedance at relevant thickness, pressure and temperature.
Can thermal grease replace a gap pad?
Only if the actual interface is suitable for a thin compound layer. Grease is not a default solution for a stand-off designed around a thicker pad. Recheck gap, containment, mounting and electrical requirements before substituting.
Are thermal interface materials electrically insulating?
No. Graphite and some metal-containing TIMs can conduct electricity. Even an insulating grade needs assembly-level checks for thickness, puncture, edges and required voltage margins.
Do all thermal gels cure after dispensing?
No. Supplied state and final behavior vary. Confirm whether the material is one- or two-component, its mixing or activation requirements, any cure conditions and its removal procedure. Product names alone do not define the process.
When should I consider a silicone-free TIM?
Consider one when customer specifications or sensitive optics, contacts, coatings or bonding processes restrict silicone-containing materials. Define the prohibited substances and evidence needed. Silicone-free does not automatically mean zero bleed, residue or outgassing.
What data should I request from a TIM supplier?
Request grade-specific thermal data with method and conditions, thickness or rheology information, mechanical behavior, electrical evidence where needed, storage and processing requirements, and reliability results relevant to your assembly.
Can TIMs be customized or reworked?
Some materials can be converted to custom shapes or supplied in application-specific formats, subject to feasibility. Rework depends on chemistry and the joint. Test removal, cleaning, replacement and remounting in your assembly.