Ensuring long-term reliability at 150°C by using a new
adhesive material
Sumitomo Electric Industries, Ltd. has developed flexible
printed circuits (FPCs) with significantly improved long-term reliability in
the environment of 150°C or higher (up to 175°C) and started shipment of sample
products. This achievement is attributed to the enhancement in insulator film
adhesion and inter-circuit insulation performance by improving the adhesive
material contained in the FPCs.
FPCs are primarily used in electronic devices including
mobile devices. In recent years, FPCs have been widely used even in LED lamps
and in-vehicle products due to its thinness, flexibility and
component-mountable fine-pitch circuits. While the service temperature of FPCs
for electronic device applications is generally 100°C or less, those used in
lighting and in-vehicle applications are required to have high heat resistance
of 100°C or more in many cases.