Silicon Forest is a nickname for the cluster of high-tech companies located in the Portland metropolitan area in the U.S. state of Oregon, and most frequently refers to the industrial corridor between Beaverton and Hillsboro in northwest Oregon.
The name is analogous to Silicon Valley. In the greater Portland area, these companies have traditionally specialized in hardware — specifically test-and-measurement equipment (Tektronix), computer chips (Intel and an array of smaller chip manufacturers), electronic displays (InFocus, Planar and Pixelworks) and printers (Hewlett-Packard Co., Xerox and Epson). There is a small clean technology emphasis in the area.
Silicon Forest can refer to all the technology companies in Oregon, but initially referred to Washington County on Portland’s west side. First used in a Japanese company’s press release dating to 1981, Lattice Semiconductor trademarked the term in 1984 but does not use the term in its marketing materials. Lattice’s founder is sometimes mentioned as the person who came up with the term.
The high-tech industry in the Portland area dates back to at least the 1940s, with Tektronix and Electro Scientific Industries as pioneers. Tektronix and ESI both started out in Portland proper, but moved to Washington County in 1951 and 1962, respectively, and developed sites designed to attract other high-tech companies. These two companies, and later Intel, led to the creation of a number of spin-offs and start-ups, some of which were remarkably successful. A 2003 dissertation on these spin-offs led to a poster depicting the genealogy of 894 Silicon Forest companies. High-tech employment in the state reached a peak of almost 73,000 in 2001, but has never recovered from the dot-com bust. Statewide, tech employment totaled 57,000 in the spring of 2012. 
Unlike other regions with a "silicon" appellation, semiconductors truly are the heart of Oregon's tech industry.
Intel's headquarters remain in Santa Clara, Calif., but in the 1990s the company began moving its most advanced technical operations to Oregon. Its Ronler Acres campus eventually became its most advanced anywhere, and Oregon is now Intel's largest operating hub. As of late 2012, Intel has close to 17,000 employees in Oregon -- more than anywhere else the company operates.
Companies and subsidiaries 
The following is a sample of past and present notable companies. They may have been founded in the Silicon Forest or have a major subsidiary:
- Alpha & Omega Semiconductor (Via their purchase of IDT's Hillsboro fab)
- Ambric (acquired by Nethra Imaging in April 2009)
- Apple Inc. (Software Engineering in Vancouver, WA. This was previously the Claris products group)
- Arris Group (via acquisition of C-COR)
- Autodesk Inc
- Cascade Microtech
- CD Baby
- ClearEdge Power
- Consumer Cellular
- Electro Scientific Industries
- FEI Company
- FLIR Systems
- GemStone Systems
- Grass Valley (company)
- IBM (by acquisition of Sequent)
- Integra Telecom
- IP Fabrics
- Jama Software
- Jive Software
- Kryptiq Corporation
- Lam Research (through merging with Novellus Systems)
- Lattice Semiconductor
- Maxim Integrated Products
- Mentor Graphics
- Nike, Inc. (Digital Sport Division)
- ON Semiconductor
- Oracle Corporation (by acquisition of Sun Microsystems)
- Panic Software
- Phoseon Technology
- Planar Systems
- RadiSys Corporation
- Rockwell Collins
- Sage Software (by the acquisition of Timberline)
- Sigma Design (Vancouver, WA)
- Shimadzu Corp.
- TriQuint Semiconductor
- Urban Airship 
- VeriWave 
- Vernier Software & Technology
- Viasystems (by the acquisition of Merix Corporation)
- WaferTech (TSMC subsidiary)
- Welch Allyn
- BiiN (defunct)
- Central Point Software (defunct)
- Etec Systems, Inc. (defunct)
- Floating Point Systems (defunct)
- Fujitsu (factory closed)
- MathStar (defunct)
- Merix Corporation (acquired by Viasystems)
- NEC (factory closed)
- Open Source Development Labs (defunct)
- Sequent Computer Systems (defunct)
See also 
- Alpern, Peter (Oct. 4, 2010). "Portland Cultivates Future as Hub for Manufacturing Alternative Energy". IndustryWeek (Penton Media, Inc.). Retrieved 30 November 2011.
- Rogoway, Mike (April 9, 2006). Bizz blog: Silicon Forest. The Oregonian.
- Manaton, Michael E. (August 4, 1994). "Tektronix began 'Silicon Forest' boom". The Oregonian (MetroWest edition).
- "Silicon Forest Universe". Portland State University: The Institute for Portland Metropolitan Studies. Retrieved 2010-06-28.
- Rogoway, Mike (August 10, 2011). "Cloud computing shines on Portland startups AppFog and Cedexis". The Oregonian.
- Siemers, Erik (December 18, 2009). "ClearEdge hums along". Portland Business Journal. Retrieved 18 February 2010.
- Rogoway, Mike (September 2010). "Silicon Forest 25 - 2010". The Oregonian. Retrieved 2010-09-20.
- About Epson Portland Inc. Epson Portland Inc. Retrieved on October 8, 2007.
- Rogoway, Mike (2010-04-05). "Genentech opens in Hillsboro, fueling Oregon's biotech aspirations". The Oregonian. Retrieved 2010-06-19.
- Tims, Dana (December 8, 2005). "Metro West Neighbors: Emerging suburb built on silicon". The Oregonian. p. 9.
- Suh, Elizabeth (October 28, 2007). "Intel's impact on community helps other businesses thrive". The Oregonian.
-  The Oregonian, Retrieved on January 9, 2012
- "Kryptiq sets move as it adds employees". The Oregonian. June 15, 2010.
- "Laika's place in the Silicon Forest <i>(updated)</i>". The Oregonian. May 17, 2006.
- Rogoway, Mike (2010-05-14). "Chip manufacturers plan to grow, Hillsboro rebounds: Silicon Forest week in review". The Oregonian. Retrieved 2010-06-20.
- The Oregonian (March 12, 2010). "2010 Oregon Technology Awards finalists named". The Oregonian. Retrieved 14 March 2010.
-  Wall St. Daily. Retrieved November 12, 2011
- Venture Capitalists loosen purse strings for startups Portland Business Journal. Retrieved on July 23, 2010
- Kosseff, Jeffrey (May 14, 2002). "Xerox's Wilsonville unit continues to make strides". The Oregonian. p. C1.
- Rogoway, Mike (2010-09-20). "The Silicon Forest 25 -- What next year's list might look like". The Oregonian. Retrieved 2010-09-20.
- Yahoo! to open customer service center in Hillsboro. KATU. Retrieved on October 8, 2007.
- Read, Richard (March 7, 2004). "Racing the world". The Oregonian.
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