Heat-Spring HSx compressible metal thermal interface
Indium Corporation · Material properties and interface engineering
- Purpose
- Uneven gaps between curved or warped dies and heat sinks can impair contact and raise local thermal resistance, requiring a TIM that conforms to non-planarity.
- Technical approach
- Patterned soft-metal foil forms compressible contact columns that deform under pressure and conduct heat. HSx offers a higher-profile, more compliant pattern.
- Scope of use
- Indium lists HSx for large CTE mismatch, curved or warped interfaces, in thicknesses of 300–1,000 µm. Select alloy and geometry for the actual contact area and clamping pressure.
- Limitations and open questions
These evaluation considerations are compiled by BLNKK from public information. They are not supplier guarantees or a mandatory submission checklist.
Scope and limitationsInterface compliance does not remove package warpage, and product thickness is not an allowable-gap rating. Alloy temperature limits and excessive-pressure extrusion matter; confirm any electrical-isolation requirements.
What to prepareBring interface area, flatness/warpage, surface materials, available clamping force, operating temperatures and resistance targets, with representative assemblies for measurement and cycling discussions.
Confirm with the supplierConfirm HSx alloy, compressed bondline, contact area and pressure distribution, and request data for the intended conditions. For immersion or repeated assembly, confirm fluid compatibility and variant selection.
- Public evidence
- The official page and 2025 datasheet describe HSx compliance and lower-pressure use. Resistance depends on bondline, pressure, temperature and interfaces; tests on other variants are not HSx guarantees.
Supporting references
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BLNKK organizes information from public sources. A company profile does not imply a documented solution. Applicability still needs confirmation against your samples and engineering conditions.