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3/9/2011 10:25:08 AM
SEMATECH Reports Advances in Bond Process for 3D Integration Development

With a focus on providing cost-effective and reliable solutions to accelerate manufacturing readiness of 3D technology options, SEMATECH experts reported new breakthroughs in wafer bonding at the 7th Annual Device Packaging Conference (DPC) on March 7-10 in Scottsdale, AZ.

Technologists from SEMATECH’s 3D Interconnect program have demonstrated a novel die-to-wafer interconnect process using a die-tacking and collective-bonding approach on a 300mm wafer platform for 3D-IC applications. Composite wafers containing a 50µm thin through-silicon-via (TSV) wafer attached to a supporting handle wafer were populated with dice using a short, low-temperature tacking process. This process enables a faster method of die-to-wafer integration needed for the advancement of heterogeneous 3D-IC.

Wafer-to-wafer (WtW) bonding is a key enabling process step for 3D interconnection of wafers through stacking. The International Technology Roadmap for Semiconductors (ITRS) roadmap for high density, intermediate level, TSVs specifies via diameters of 0.8 to 4.0µm in 2012 and beyond.

“Through collaborative research efforts, SEMATECH has developed new approaches to implementing 3D,” said Sitaram Arkalgud, director of SEMATECH’s 3D Interconnect Program. “This practical implementation approach is critical to the integration and process development that will make 3D TSVs commercially viable.”

3D ICs will play an important role in the semiconductor industry, given their potential to alleviate scaling limitations, increase performance and functionality, and reduce cost. In this emerging field, new and improved technologies and integration schemes will be necessary to realize 3D’s potential as a manufacturable and affordable path to sustaining semiconductor productivity growth.

Additionally, Sitaram Arkalgud presented a summary of SEMATECH’s programs in 3D IC technology development and emerging standards at the Global Business Council Spring Conference, held in conjunction with DPC. Arkalgud delivered an invited talk highlighting SEMATECH’s 3D Enablement program and a summary on how it will enable industry-wide ecosystem readiness for cost-effective TSV-based stacked IC solutions.

SEMATECH’s 3D program was established at CNSE’s Albany NanoTech Complex to deliver robust 300 mm equipment and process technology solutions for high-volume TSV manufacturing. In order to accelerate technology adoption and build critical industry infrastructure, SEMATECH established the 3D Enablement program to drive cohesive industry standardization efforts and technical specifications for heterogeneous 3D integration. Administered by SEMATECH’s 3D Interconnect program, in partnership with SIA and SRC, the program is developing technologies and specifications necessary for establishing standards in critical areas such as inspection, metrology, microbumping, bonding and thin wafer and die handling.

SEMATECH:

For over 20 years, SEMATECH (http://www.sematech.org), the international consortium of leading semiconductor manufacturers, has set global direction, enabled flexible collaboration, and bridged strategic R&D to manufacturing. Today, we continue accelerating the next technology revolution with our nanoelectronics and emerging technology partners.

Other Headlines from SEMATECH ...
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 - U.S. Department of Energy Awards Funding to CNSE CIGS Solar Project
 - In major victory, Schumer announces CNSE-SEMATECH big winner of high-tech grant that will make Albany a national center in solar cell research and create thousands of jobs
 - SEMATECH Reports Advances in Bond Process for 3D Integration Development

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