Via Acquire Media NewsEdge) Oct. 28--Lattice Semiconductor, clustered with other old-line Oregon technology companies along the Sunset Highway, plans to move from its roomy Hillsboro headquarters into leased offices in downtown Portland's U.S. Bancorp building -- commonly known as "Big Pink." Washington County, a nexus for Oregon tech since the 1950s, has been ceding that role over the past several years as the state's tech economy shifted from big manufacturing companies to software startups that don't need much more than desks and laptops.