Mahwah, N.J. MH&W International has introduced its Keratherm 86/77 flexible thermal circuit, or FTC, that consists of a thin layer of etchable copper bonded to a highly thermally conductive silicone film. It's used to mount LEDs and other components on curved surfaces where FR4, metal clad printed-circuit-boards (MCPCBs) and other rigid materials cannot be used. It also replaces thicker, heavier PCBs where size and weight are restricted such as in portable electronics.
The Keratherm 86/77 copper and silicone material is produced with proven flex circuit manufacturing processes. Sheets, strips, and custom shapes are lighter and more flexible than both FR4 and MCPCBs, and the copper layer can be etched into a variety of circuit pathways, said the company. The conformable material ranges from 0.16 to 0.326-mm thick and can be secured with thermally conductive adhesive. Thermal transfer performance is said to be superior to that of flexible circuits made from PI, PET and PEN films.
A single 86/77 flexible circuit can replace multiple boards, and eliminate jumpers and connectors to improve reliability, said the company. Different copper thicknesses are available for specific power requirements. With the copper layer intact, the material can also be formed into a Faraday-cage design for EMI protection. Kertherm 86/77 contains no hazardous materials, such as flame retardants. Parts can be readily handled, fabricated and recycled.
Pricing: Keratherm 86/77 is supplied in rolls 400-mm wide for volume processing. Pricing for the material starts at $0.09 per square inch.
Product Information: Keratherm products
MH&W International, 1-201-891-8800, www.mhw-thermal.com