The application of carbon black and printing ink technology in molded interconnect devices

In this article, the processing of molded interconnect devices (MIDs) was studied via in-mold decoration (IMD) molding technology. A screen printing process using carbon black and printing ink was proposed in the study. For comparison, various conductivity materials such as copper powder, iron powder, carbon black and silver composite were studied with the screen printing method. The results show that there is no electrical conductivity for the ink containing copper or iron powder up to 90% concentration. The low cost carbon black with printing ink was shown to be successful for the IMD process.