Key Application • Medical Devices
Thermal Management Materials for Medical Devices
Medical devices demand stable thermal performance, electrical safety and clean material selection. Sheen provides silicone and silicone-free thermal pads, thermal gel, thermal grease, thermal adhesives and potting compounds to reduce interface thermal resistance, manage tolerance stack-up, and support repeatable manufacturing (die-cut parts, dispensing processes, production-scale supply).
Silicone-free options
Electrical insulation focus
Low-stress gap filling
Sampling → scale production
Typical devices: patient monitoring, imaging auxiliaries, portable diagnostics, sealed power & control electronics.
Silicone-free for sensitive assemblies
Shortlist silicone-free pads first where contamination control is required (optics / medical-sensitive zones).
Insulation + thermal in one decision
Select materials with insulation targets in mind; dielectric strength is often a key design constraint.
Low-stress processability
Dispensable gel and compliant pads cover height variation and reduce assembly stress on fragile parts.
Why Medical Devices Overheat
Interface losses dominate
Compact layouts concentrate SoC, power stages and control circuits. Interface thermal resistance often dominates the final temperature.
Hotspot control
Interface Rth
Cleanliness & silicone sensitivity
For optics-adjacent or contamination-controlled zones, silicone migration/outgassing risk can be unacceptable; silicone-free options should be evaluated early.
Silicone-free
Contamination control
Key Platforms & Hotspot Locations
Structured for engineer & sourcing searches: platform → hotspots → interface → recommended material families.
Portable / Monitoring Devices
Hotspots: SoC/PMIC, power stages, shielded chips. Interfaces: chip→shield, PCB→housing.
Thermal gel
Pads
Low stress
Optics-Adjacent Electronics
Focus: silicone restriction and cleanliness. Interfaces: PCB/components → chassis/heatsink.
Silicone-free pads
Controlled BLT
Power & Control Modules
Hotspots: MOSFET/diode, transformer, resistors. Focus: insulation targets + thermal coupling.
Insulating pads
Potting
Safety margin
Product Parameter Matrix (Quick Comparison)
Material family → key parameters → best-fit medical interfaces → manufacturing notes.
| Material Family | Key Parameters | Best Fit in Medical Devices | Manufacturing Notes |
|---|---|---|---|
| Silicone Thermal Pads | Multi-grade thermal conductivity; silicone pad series can reach high k (e.g., up to 15 W/m·K in Sheen overview). | General thermal coupling: PCB/components → heatsink/housing | Sheet/die-cut parts for repeatable placement |
| Silicone-Free Pads | Designed for silicone-sensitive electronics; applicable to optics/medical-sensitive zones. | Optics-adjacent and contamination-controlled assemblies | Shortlist early; then finalize k/thickness/hardness by gap window |
| Thermal Gel | k about 2.0–10.0 W/m·K; dispensable; low assembly force; covers height variation. | Height variation, fragile parts, automated dispensing | Define target thickness and dispensing pattern for stable performance |
| Thermal Grease | Min interface thickness 0.05 mm; manual or screen printing; k about 1.0–5.0 W/m·K. | Ultra-thin BLT interfaces with clamp force; serviceable assemblies | Control coverage and migration/cleanliness plan |
| Thermal Potting | k 0.8–3.5 W/m·K; self-leveling; cured elastomer provides protection + insulation + thermal path. | Sealed compartments: protection + insulation + thermal management | Confirm cure schedule and rework strategy before design freeze |
| Carbon Fiber Thermal Pad | Thermal conductivity 15–45 W/m·K; thinnest 0.3 mm; single/double-side adhesive options. | High heat-flux hotspots (structure-dependent) | Use as a heat-spreading / heat-path element based on stack-up |
Fast RFQ: silicone restriction, insulation/dielectric target, interface, gap min/max, pressure window, and manufacturing format.
Reference U Cases
Match interface geometry and process constraints to a stable material family.
Use Case 1 — Silicone-Sensitive Imaging / Optics-Adjacent Electronics
- contamination control/silicone restriction
- PCB/components → chassis/heatsink
- silicone-free thermal pads as the first shortlist, then finalize by gap window
Use Case 2 — Portable Monitoring Device with Height Variation
- fragile parts + limited assembly force
- chips → shield / board → housing
- thermal gel (disposable, low stress) + pads for defined gaps
Use Case 3 — Medical Power & Control Module (Insulation Required)
- dielectric/insulation targets drive material choice
- MOSFET/diode/transformer → chassis
- insulating pad stack + potting if sealing/protection is required
Use Case 4 — Sealed Electronics Compartment
- protection + insulation + thermal
- thermal potting (self-leveling; cured elastomer for protection/insulation/thermal path)
Qualification & Reliability
Designed for regulated environments and stable manufacturing execution.
Recommended engineering flow
- Confirm constraints: silicone restriction + insulation target
- Gap mapping (min/max) + pressure window definition
- Shortlist: pad vs gel vs grease vs potting; define target BLT
- Thermal validation: steady-state + hotspot mapping
Reliability backing & documentation
- 1000h thermal shock; 1000h 85°C/85%RH; 1000h high-temp aging (per Sheen reliability statement)
- Deliverable pack: TDS, process window, die-cut drawings, incoming QC points
- Company: Founded 2008; 110 employees; 5,000㎡ facility; ISO9001/14001/IATF16949
Selection Table (RFQ Fields)
Copy-paste checklist to accelerate matching and sampling.
| Category | Fields to Provide | Examples |
|---|---|---|
| Device Context | Device type, silicone restriction, cleanliness constraints | Optics-adjacent module; silicone-free required |
| Safety / Electrical | Insulation required; dielectric target (kV/mm or VAC) | Dielectric margin for power module interface |
| Interface | Heat source; interface location; contact area; substrates | SoC→shield; 30×30 mm; Al/FR4 |
| Gap & Mechanical | Gap min/max; target BLT; clamp pressure/torque; rework | Gap 0.6–1.4 mm; low torque; rework yes |
| Thermal Targets | Hotspot limit; steady-state rise; preference (thin BLT vs compliance) | Prefer low Rth thin BLT if clamp force allows |
| Manufacturing | Format (die-cut/dispense/potting); method; annual volume | Die-cut pads + automated dispensing gel; 20k/yr |
FAQ (Medical Devices Thermal Management)
Optics-adjacent & contamination-controlled zones.
–
Use silicone-free pads when silicone restriction or contamination control is required (commonly for optics-adjacent electronics and silicone-sensitive medical assemblies). Confirm the restriction first, then finalize k/thickness/hardness by gap window.
Low-stress gap filling for tolerance stack-up.
+
Thermal gel is often preferred when height variation is significant or assembly force must be low, because it is dispensable and reduces stress on fragile components. Pads are best for defined gaps and fast, repeatable placement (sheet/die-cut).
Dielectric target often drives the decision.
+
Provide whether electrical insulation is required and your dielectric target (VAC or kV/mm), plus the interface substrates. This helps select insulating pad families or potting solutions aligned to safety margins.
Protection + insulation + thermal path.
+
Yes. Thermal potting can provide device protection, electrical insulation and thermal dissipation in sealed compartments, provided the curing process and rework strategy are defined early.
Constraints → interface → gap → process.
+
Send: device type, silicone restriction, insulation/dielectric target, interface location, contact area, gap min/max, clamp pressure/torque limits, target hotspot temperature, and preferred manufacturing format (die-cut/dispense/potting).