Abstract：
:Three-dimensional integrated circuits (3D ICs) are an attractive replacement for conventional 2D ICs as high-performance, low-power-consumption, and small-footprint microelectronic devices. However, one of the major remaining challenges is the manufacture of high-aspect-ratio through-silicon vias (TSVs), which is a crucial technology for the assembly of 3D Si ICs. Here, we present the fabrication of high-quality TSVs using a femtosecond (fs) 1.5-μm Bessel beam. To eliminate the severe ablation caused by the sidelobes of a conventional Bessel beam, a fs Bessel beam is tailored using a specially designed binary phase plate. We demonstrate that the tailored fs Bessel beam can be used to fabricate a 2D array of approximately ∅10-μm TSVs on a 100-μm-thick Si substrate without any sidelobe damage, suggesting potential application in the 3D assembly of 3D Si ICs.
journal_name
Sci Repjournal_title
Scientific reportsauthors
He F,Yu J,Tan Y,Chu W,Zhou C,Cheng Y,Sugioka Kdoi
10.1038/srep40785subject
Has Abstractpub_date
2017-01-18 00:00:00pages
40785issn
2045-2322pii
srep40785journal_volume
7pub_type
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