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Intel Buys Infineon Wireless Unit for $1.4 Billion

Intel Corp., the largest chipmaker, agreed to buy the wireless operations of Infineon Technologies AG for about $1.4 billion, gaining a foothold in the mobile-phone business it has struggled to crack for more than a decade.

Infineon, Europe’s second-biggest semiconductor maker, expects the all-cash transaction to close in the first quarter of 2011, according to a statement today. The business makes third-generation, or 3G, chips for devices like Apple Inc.’s iPhone and Samsung Electronics Co.’s Galaxy S.