We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Implementation of Flip-Chip Microbump Bonding between InP and SiC Substrates for Millimeter-Wave Applications.
- Authors
Lee, Jongwon; Lee, Jae Yong; Song, Jonghyun; Sim, Gapseop; Ko, Hyoungho; Kong, Seong Ho
- Abstract
Flip-chip microbump (μ-bump) bonding technology between indium phosphide (InP) and silicon carbide (SiC) substrates for a millimeter-wave (mmW) wireless communication application is demonstrated. The proposed process of flip-chip μ-bump bonding to achieve high-yield performance utilizes a SiO2-based dielectric passivation process, a sputtering-based pad metallization process, an electroplating (EP) bump process enabling a flat-top μ-bump shape, a dicing process without the peeling of the dielectric layer, and a SnAg-to-Au solder bonding process. By using the bonding process, 10 mm long InP-to-SiC coplanar waveguide (CPW) lines with 10 daisy chains interconnected with a hundred μ-bumps are fabricated. All twelve InP-to-SiC CPW lines placed on two samples, one of which has an area of approximately 11 × 10 mm2, show uniform performance with insertion loss deviation within ±10% along with an average insertion loss of 0.25 dB/mm, while achieving return losses of more than 15 dB at a frequency of 30 GHz, which are comparable to insertion loss values of previously reported conventional CPW lines. In addition, an InP-to-SiC resonant tunneling diode device is fabricated for the first time and its DC and RF characteristics are investigated.
- Subjects
SEALING (Technology); INSERTION loss (Telecommunication); RESONANT tunneling; TUNNEL diodes; SILICON carbide; JUNK bonds
- Publication
Micromachines, 2022, Vol 13, Issue 7, pN.PAG
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi13071072