Temporary Bonding Using Paper Inserted PPC Layer

Temporary bonding using paper inserted polypropylene carbonate (PPC) layer is demonstrated. The inserted paper layer can absorb photo acid generator (PAG)-induced acid and protect the substrate. Large improvements of bonding strength are achieved using paper inserted PPC layer. Especially, the bonding strength is much higher than that of PPC/PAG-PPC bonding for tissue paper. The results show that the paper fibers can absorb decomposed PPC and PAG-induced acid, thus protecting the substrate

Temporary Bonding/Debonding of Silicon Substrates Based on Propylene Carbonate

This paper researches temporary bonding/debonding based on propylene carbonate (PPC). The highest shear strength of 4.1 MPa was achieved when pure PPC was used as bonding adhesive. Room temperature debonding methods were investigated and compared with thermal debonding. Chemical debonding at room temperature was realized for bonding with the pure PPC. Several different chemicals can be used for chemical debonding. A photo acid generator (PAG)-assisted debonding method was demonstrated at room temperature when PAG-loaded PPC (PAG-PPC) was used as bonding adhesive. The ultraviolet (UV) radiation was used to enhance the PAG-assisted debonding.