Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) SEM images of solder paste deposited on the vias filled with dielectric polymer and covered by printed UBM. Scale bars are 50 μm. (b) Schematic of the UBM and solder ball layout on the interposer for demonstrating the increase in I/O density. I/O, input/output; SEM, scanning electron microscope; UBM, under bump metallization.
