A thin film thermoelectric cooler for chip-on-board direct assembly

A thin film solid state cooler for COB direct assembly using supperlattice based thermoelectric material is reported. The embedded cooler attached between the die chip and metal plate can provide site-specific cooling as well as active on-demand cooling. This demonstration offers the possibility of thin film active cooling for the COB direct assembly. The high power density of chip-on-board would be no longer be limited by cooling capability. This technology can be extended to the case of hot spot cooling for COB assembly that can be selectively switched on and off depending on which part of the chip is in critical need of cooling at any point of time.