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New Technology of Self-healing Interconnects by IIS Bangalor

Self Reparable Electronics: Tiny gadgets made with flexible electronics are usable for a variety of applications such as the wearable devices and strip thermometers, but circuits inside them are prone to break if they are bent in different directions over a period of time.

Researchers at the Indian Institute of Science Bangalore who have developed a technique to overcome this problem. The researchers have demonstrated that it is possible to make flexible electronics self-healing.

Indian Institute of Science Bangalore 

The main goal of a metal wiring in an integrated circuit is to create electrical connections amongst the active devices in order to transmit and distribute signals and power. In electronic gadgets, like transistors televisions and laptops, There are many interconnections available as heart interconnect.

In small and portable devices like glucometer, chips to monitor health parameters have flexible interconnect. Interconnects on flexible surfaces regularly experience mechanical forces due to stretching bending and thermal stress.

The unexpected current flows due to electronic discharge environment-related degradation also cause damage to these interconnects.

New Technology of Self-healing Interconnects

As a result, open interconnect falls during system operations are very common. To overcome all possible limitations a team of Researchers led by Dr Sanjeev Sambandan associate professor Department of instrumentation and applied physics Indian Institute of Science Bangalore has developed a new technology of self-healing interconnects, which not only detects a fault automatically but also heals it without any external interference.

Dr Sanjeev Sambandan and his team extensively worked on finding possible solutions for self-heal. After four years of efforts, They used a mixture of copper microspheres and silicon oil between two electrodes. Copper microspheres are tiny spheres with a radius of 5 Micron.

A circuit breaks as soon as the external stresses induced on it. The electric current induces a dispersion of copper spheres towards the gap of damaged interconnects and forms a chain between the gap of damage. The heat generated due to electric conductivity forms a compact mass, which is also stretchable.

The work is done by Dr Sanjeev Sambandan and his team is commendable and has huge potential in the field of flexible Electronics. This technique will be useful in space crafts and satellite launchers. The work was financially supported by engineering and physical sciences research council and Department of Science and Technology Government of India.