Patent ID: 8278142

Claim:
A method forming an electronic assembly, comprising: providing (i) a plurality of IC die, said IC die each comprising a top surface including active circuitry and a bottom surface opposite said top surface, at least one of said top surface and said bottom surface comprising a plurality of IC bonding conductors which are coupled to said active circuitry and (ii) a workpiece comprising a workpiece surface having a plurality of workpiece bonding conductors thereon, said workpiece comprising a wafer comprising a plurality of non-singulated die; applying a curable dielectric film to at least partially cover said plurality of IC bonding conductors or onto said workpiece surface; placing said plurality of IC die on said workpiece surface so that said plurality of IC bonding conductors are aligned to and face said plurality of workpiece bonding conductors to provide a first bonding, wherein said placing is performed at a vacuum level corresponding to a pressure <1 kPa (<7.5 torr), and at a temperature high enough to provide tackiness to said curable dielectric film; pressing said plurality of IC die to provide a second bonding, wherein a temperature during said pressing is sufficient to cure said curable dielectric adhesive film and to form metallic joints between said plurality of IC bonding conductors and said plurality of workpiece bonding conductors, wherein said pressing comprises using a pressing system comprising an upper die tool and a lower die tool, said upper die tool comprising a single bonding head for simultaneously pressing said plurality of IC die, wherein said wafer is positioned on said bottom die tool, further wherein said single bonding head includes interior panel extension bars located between said plurality of IC die that extend beyond a height of said single bonding head over said plurality of said IC die and outer side bars beyond said plurality of IC die for approaching but not contacting said wafer during said pressing to form an enclosure around said plurality of IC die.