15 June 2016
Manufacturing / Production Technology, Hardware & Services
The rapid growth of LEDs has fuelled innovations in lighting design and has seen applications escalating. Global electro-chemicals manufacturer, Electrolube, is consistently developing new materials to protect LED-based systems and their associated driver electronics from a host of environmental factors, and recently launched an innovative new surface-cure thermal paste (SCTP), which is extremely stable during even the harshest thermal shock testing.
The thermal interface material is designed to fill gaps that naturally exist between two metal surfaces placed one upon the other, improving the effective range of surface area for heat transfer. Unlike other RTV materials, one of the key properties of SCTP is that it does not set. The material remains malleable when rework of components is required, reducing any delays in production waiting for through-cure to occur.
The product is specifically designed to resist pump-out of the thermal interface layer from the bond line, ensuring minimal degradation of effective heat dissipation. It is especially suited to applications that are exposed to rapid and frequent changes in temperature, as such conditions are known to exaggerate the pump-out effect of standard thermal pastes, which SCTP completely eliminates. SCTP also has excellent thermal stability up to 200°C.
The physical application of SCTP is simple and enables easy application of thin layers. The material can be applied using conventional industrial dispensing equipment and can also be applied via screen/stencil printing directly onto the contact surfaces. In addition, it does not contain any solvents, and due to its ease of application, it is possible to apply very thin films, therefore minimising the effects of thermal resistance at the interface and offering much greater stability over the lifetime of the device when compared to conventional heat transfer systems.
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Fuji has achieved the world’s first placement of 016008 mm (0,16 x 0,08 mm or 006 x 003 inches) size components on printed circuit boards with its SMT pick and place machine, NXTR.
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