An electrically non-conducting film (109) comprising an oligomer comprising an arylene or heteroarylene repeating unit is disposed between a chip (105), e.g. a flip-chip, and a functional layer (101), e.g. a printed circuit board, electrically connected to the chip by electrically conducting interconnects (107). The oligomer may be crosslinked.

A method for manufacturing sinter bonding film, includes: preparing a resin formulation; preparing a metal filler mixture; mixing the resin formulation and the metal filler mixture, thereby preparing a paste for film manufacturing; and manufacturing a sinter bonding film by using the paste for film manufacturing. The metal filler mixture includes a metal powder and a reducing agent, copper metal (Cu) corresponds to respective particles in the metal powder, and the surface of the respective particles in the metal powder undergoes acid treatment or non-treatment.

Photonics integrated circuit (PIC) dies bonded to photonics substrates, related apparatuses, systems, and methods of fabrication are disclosed. A photonics substrate and a PIC die include corresponding optical bonding regions one or both of which are surrounded by hydrophobic structures. A liquid droplet is applied to the PIC die or photonics substrate optical bonding region and the PIC die is placed on the optical bonding region of the photonics substrate. Capillary forces cause the PIC die to self-align to the optical bonding region, and an optical bond is formed by evaporating the liquid and subsequent anneal.

Provided is a non-electroconductive flux capable of enhancing productivity and impact resistance of a connected structure to be obtained and suppressing occurrence of solder flash. The non-electroconductive flux according to the present invention contains an epoxy compound, an acid anhydride curing agent, and an organophosphorus compound.