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On July 7, 2005, Vesta Technology announced two deposition systems for 200 mm and 300 mm semiconductor fabs: IRIS, for high-k dielectric films, and VULCAN, for metal films. The distinction mattered: IRIS paired dielectric ALD with a remote-plasma anneal module, while VULCAN combined ALD and vapor-phase deposition (VPD) so a process could use ALD for initial layers and faster vapor-phase modes for bulk deposition. The announcement was a historical attempt to balance film quality, throughput and process temperature—not evidence that either product is available today.
What did Vesta announce?
Vesta’s July 7, 2005 rollout covered separate dielectric and metal deposition systems for 200 mm and 300 mm wafer fabs. The company positioned them for high-k and metal films in semiconductor manufacturing. Its release framed the combined ALD/VPD approach as a response to two process trade-offs: CVD’s film-quality limitations and ALD’s relatively low deposition rate.
| System | Target film and use | Process approach | What the 2005 sources establish |
|---|---|---|---|
| IRIS Dielectric ALD System | High-k films for capacitor and gate-dielectric applications | ALD with an integrated module for sequential remote-plasma annealing | Vesta and EE Times described the application and anneal capability in 2005; a production throughput figure for IRIS is not stated. |
| VULCAN Metal ALD/VPD System | Metal films | In-situ or sequential dual-mode processing: ALD for initial layers, followed by higher-throughput vapor-phase processing for bulk layers | Vesta’s 2005 release described the architecture; a production throughput figure for VULCAN is not stated. |
What made IRIS different?
High-k dielectric deposition with a separate anneal capability
IRIS was aimed at high-k films in two device contexts: capacitor dielectrics and gate dielectrics. High-k materials were relevant because device makers needed dielectric layers that could serve those structures as transistor and memory designs evolved. Vesta’s stated product distinction was not simply that IRIS deposited a high-k film: the system included an integrated remote-plasma anneal module that enabled sequential plasma annealing.
The announcement presented plasma capability as a way to support lower-temperature processing. Vesta connected that capability to gate electrodes, back-end-of-line (BEOL) processing and polymeric substrates, where limiting thermal exposure can matter. The release does not establish a specific temperature for IRIS or demonstrate that every listed application was qualified on the system.
How did VULCAN combine ALD and vapor-phase deposition?
ALD for the beginning of a layer, VPD for bulk growth
VULCAN could run ALD and VPD in situ or sequentially. In the approach Vesta described, ALD formed the initial layer, and a vapor-phase mode deposited the thicker bulk portion at higher throughput. “In situ” means the stages can be carried out within the integrated process environment; “sequential” describes carrying out one mode and then the other. Vesta’s release did not specify a single mandatory recipe or claim that every VULCAN process used both modes.
The engineering logic was to use each method where its strengths were most useful: ALD for controlled initial coverage and VPD for faster bulk deposition. Vesta argued this combination could address the film-quality limitations it associated with CVD while reducing the rate penalty it associated with ALD. That was the company’s rationale for the architecture, not an independently reported comparative test result.
Why did throughput and film thickness matter?
In 2005, a practical question for gate-stack ALD was whether it could meet manufacturing throughput expectations as well as film requirements. Chuck Kim, then Vesta’s executive director, told EE Times that a production-worthy gate-stack ALD process needed to handle 15–40 Å films at 20–25 wafers per hour. That was a cited production target, not a published throughput result for either IRIS or VULCAN.
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What was the development and evaluation context?
ATDF and Vesta launched an R&D and customer-demonstration facility in 2005. ATDF provided cleanroom space and access to 200 mm and 300 mm tool sets, while Vesta supplied equipment. This gave customers and researchers a setting to evaluate equipment without building complete fab infrastructure.
ATDF’s 2006 Tool Access Program listed an IRIS dielectric ALD cluster tool comprising two Nano-ALD chambers for 200 mm/300 mm wafers and an IRIS remote-plasma annealing chamber. The program also listed VULCAN metal ALD tools. That listing is evidence of tool access in the program; it does not by itself establish broad commercial deployment or later product availability.
Vesta also had an exclusive technology agreement with Korean equipment maker IPS covering marketing, sales, service and future development of IPS tools. That relationship provides business context for the rollout, but the available account does not establish how it affected the products’ subsequent market reach.
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A 2007 Vesta/ATDF report made separate claims about low-temperature TiN processing and a material called Super-k. It reported processing at 350°C compared with conventional thermal TiN films at 550–600°C, and characterized the process temperature as up to 30 percent below conventional TiN deposition temperatures. These are historical vendor/ATDF claims; they are not 2005 IRIS or VULCAN specifications.
The same 2007 report said Super-k’s dielectric constant after post-deposition annealing was nearly twice that of competing HfO2– and ZrO2-based films. This, too, is a reported comparison from that period, not current comparative performance data.
Does the 2005 rollout mean Vesta’s systems are available now?
No current product availability or Vesta corporate status is established by the historical announcements and program listings described here. High-k dielectric and plasma-enhanced ALD remain equipment categories: ASM’s current portfolio, for example, lists Pulsar systems for high-k dielectrics in advanced CMOS high-k metal gates, EmerALD for conformal metal and dielectric layers, and Synergis systems for high-volume thermal ALD. That present-day category context does not show that Vesta’s 2005 systems remain on sale or that their designs continued into current products.
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