Tech Notes
Practical notes on selecting thermal interface and EMI shielding materials, written for engineers. All values are subject to the test report.
Topics covered on an ongoing basis
- Composition and test methods of thermal interface resistance: separating bulk resistance from contact resistance, and reading test reports under their stated conditions.
- Boundaries for hardness and compression ratio of thermal pads: balancing structural strength, interface wetting and long-term resilience.
- How downstream processes such as adhesive backing, lamination and die-cutting affect assembly efficiency: choosing a delivery form that fits the line.
- Reliability validation of conductive foam after vibration and thermal cycling: how to measure and judge compression set and resilience decay.
- Selecting core and covering combinations: where conductive fabric, metallized layers and conductive adhesives fit in different structures.
- Application boundaries of other interface forms such as thermal gel and phase-change materials (extension products and exploratory directions; specific specifications and availability are subject to commercial confirmation).
Published
2026-10-16 | Conductive Foam | 8 min read
Shielding effectiveness is not a fixed property of the material; it comes from the material, the joint structure and the compression state working together. This note explains what insufficient and excessive compression do, and gives a usable formula for free thickness: measured maximum gap ÷ (1 − target compression rate).
2026-10-16 | Thermal Pads | 6 min read
The starting point is not thermal conductivity, but "how many watts must be moved within how much temperature rise budget". This note sets out the four steps — power, gap, structural strength and downstream requirements — with the boundary conditions for each.
All parameter ranges are subject to the actual test report; specific grades and availability are subject to commercial confirmation. Comments on operating conditions and selection experience are welcome on each article page.
