Colder, Colder…

The process of sintering, or bonding the metals that make up the flexible circuits, usually happens at 572 degrees Fahrenheit.

“The skin surface cannot withstand such a high temperature, obviously,” Penn State engineer and lead author Hanyu “Larry” Cheng said in a press release. “To get around this limitation, we proposed a sintering aid layer — something that would not hurt the skin and could help the material sinter together at a lower temperature.”