regarding printed circuit board(
Conductive adhesives increase microchip packaging density Conductive Adhesives Increase Microchip Packaging Density Interconnecting microelectromechanical systems directly to printed circuit boards can improve reliability and reduce costs
GPD Global | https://www.gpd-global.com/pdf/doc/Dispense-System-Service-Guide-22290008G.pdf
. No hazardous electrical work - Type 4 tasks - are to be performed on the equipment. WARNING Heated surfaces are found within the system and are indicated by a warning icon