The invention provides a high-density photoelectric common connection pinboard based on a low-loss
silicon nitride grating coupler. The invention aims to overcome the difficulty that the existing photoelectric heterogeneous
chip is difficult to integrate, stack and
package, and realizes high-density
interconnection between the
chip and the
interposer by using a
grating coupling structure and a
silicon through hole technology, thereby realizing high-integration low-loss packaging of the heterogeneous
chip on the
interposer. According to the invention, high-efficiency optical
interconnection between the heterogeneous chip and the photoelectric co-connection intermediate layer is realized through the high-efficiency
grating coupler, and high-density electrical
interconnection between the chip and the photoelectric co-connection intermediate layer is realized through the TSV technology and the RDL technology. Meanwhile, the optical interconnection efficiency between the
interposer and the chip is improved by utilizing the
electrode patterning
advantage of the RDL technology, and the self-alignment between the chip and the interposer is realized. The method has extremely high compatibility to the packaging scene of the existing photoelectric heterogeneous chip, so that the method has great significance in improving the integration density and reducing the interconnection loss of a photoelectric heterogeneous integrated
system and promoting the practicability of the photoelectric heterogeneous integrated
system.