Lucent Technologies acquired VTC Inc.’s semiconductor operation in 2000, then sold the remaining manufacturing business as PolarFab, an independent U.S.-owned pure-play BiCMOS foundry. PolarFab focused on making mixed-signal chips for multiple customers rather than competing in the price-sensitive disk-drive IC market. In 2005, Sanken Electric acquired the company, which adopted the Polar Semiconductor name.
What happened to VTC’s semiconductor operation?
Lucent acquired VTC’s intellectual property and 232 design and product engineers. The manufacturing operation that remained became PolarFab in 2000. Polar Semiconductor’s official company history records that transition and says the new foundry served more than 50 customers worldwide.
PolarFab began with more than 10,000 wafers of monthly capacity, according to the company’s 2000 launch figures reported at the time. Its president and COO, Gregory Peterson, described the facility as 170,000 square feet. The company reported output of 30,000 six-inch wafers per quarter, with plans to expand to 35,000 and then 40,000 per quarter. Its 2000 plans also called for capacity of at least 17,000 wafers per month by early 2001 and 22,000 by the second quarter of that year. These are historical launch and expansion figures, not present-day capacity measurements.
Why did PolarFab adopt a pure-play foundry model?
VTC had served disk-drive manufacturers, but pricing pressure made it difficult to sustain its head preamp business. Peterson said VTC could compete when prices and customer expectations were “reasonable.” PolarFab’s alternative was to manufacture for multiple chip companies as a dedicated foundry, rather than depend on one product market or compete directly with its customers.
The strategy paired specialized manufacturing with substantial engineering and production support. The launch offering included prototype assembly, wafer probing, final package testing, yield enhancement, and help resolving electrostatic-discharge and latch-up problems. Peterson characterized the remaining 420 employees’ work as “hand-holding” for designers. That service model was intended to help customers take mixed-signal designs from development into production, not merely buy wafer capacity.
What did PolarFab manufacture?
BiCMOS and mixed-signal chips
BiCMOS combines bipolar transistors and CMOS circuitry on a single substrate. In the applications PolarFab targeted, bipolar devices could provide speed and noise immunity for analog front ends, while CMOS handled digital functions. That combination suited communications interfaces, RF circuits, power management, Bluetooth devices, disk-drive read channels, and other mixed-signal designs.
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Polar35 process
In 2001 PolarFab introduced Polar35, a 0.35-micron process on an 8-inch fab supporting analog, BiCMOS, CMOS, and mixed-signal integrated circuits. Trade coverage reported an RF bipolar NPN capability of up to 28 GHz fT. The process also had Cadence process-design-kit support and a PolarShuttle multi-project-wafer program, which let multiple designs share a wafer run.
PolarFab sales director Jerry Thimsen described its focus as “RF (radio-frequency), power-management, Bluetooth, and related applications.” This specialization distinguished it from foundries organized around high-volume commodity CMOS. Polar35’s 0.35-micron process was suited to analog and mixed-signal work; it should not be compared as a direct substitute for present-day leading-edge logic processes, which serve different applications and have different manufacturing economics.
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Who were PolarFab’s customers?
The 2000 launch coverage named Seagate, Western Digital, Maxtor, and Samsung among VTC’s disk-drive customers, and Cirrus Logic and Lucent among chip-supplier customers. It also reported PolarFab contracts with Lucent’s Microelectronics Group and Maxim Integrated Products. The 2001 Polar35 coverage placed the company in competition with Taiwan Semiconductor Manufacturing and X-Fab for analog and mixed-signal foundry work.
These names describe customers and competitors reported around the launch period. They are not a current customer list. The company’s history says PolarFab served more than 50 worldwide customers, but that figure is likewise historical rather than a current count.
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How did PolarFab become Polar Semiconductor?
- 2000: VTC’s remaining semiconductor manufacturing operation became PolarFab, an independent pure-play foundry.
- 2001: The company completed a 200mm fab and entered a foundry agreement with Allegro Microsystems, according to Polar Semiconductor’s company history.
- 2005: Sanken Electric acquired the business, after which it adopted the Polar Semiconductor name. The acquisition announcement reported a purchase price of $83 million and 45 customers at the time.
Polar Semiconductor describes its current business as an independent technology-development and wafer-manufacturing center. Its present capability overview includes GaN, MOSFET, IGBT, and BCD technologies. Those capabilities reflect the company’s later development and should not be attributed to PolarFab’s 2000 launch, which centered on BiCMOS and mixed-signal foundry services.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the PolarFab story shows about foundry economics
PolarFab’s transformation was a move from owning and selling end products in a volatile market toward selling specialized manufacturing and engineering services to multiple chip designers. Its appeal rested on process specialization, customer support, and a customer base broad enough to use the fab across applications. The model also depended on attracting enough wafer demand to support the facility; the historical capacity plans alone do not establish actual utilization or profitability.
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Available historical coverage describes PolarFab’s technology, launch customers, and planned capacity, but it does not establish the company’s present revenue, utilization, or customer roster. Its later ownership and broader technology portfolio belong to Polar Semiconductor’s subsequent history, not to the original rationale for creating PolarFab.
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