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KLA-Tencor Corporation
NASDAQ-100 Component
S&P 500 Component
Industry Semiconductor Equipment & Materials
Founded 1997 (merger of KLA and Tencor)
Headquarters Milpitas, California, United States
Key people
Edward W. Barnholt, Chairman
Richard P. Wallace, CEO
Products Chips, wafers, semiconductors, and other related industries.
  • Decrease US$ 3,842.781 million (2013) [1]
  • Decrease US$ 3,171.944 million (2012) [1]
  • Decrease US$ 729.685 million (2013) [1]
  • Decrease US$ 1,016.325 million (2012) [1]
  • Decrease US$ 543.149 million (2013) [1]
  • Decrease US$ 756.015 million (2012) [1]
Total assets
  • Increase US$ 5,287.357 million (2013) [2]
  • Increase US$ 5,100.308 million (2012) [1]
Total equity
  • Increase US$ 3,482.152 million (2013) [2]
  • Increase US$ 3,315.595 million (2012) [1]
Number of employees
6,060 (2014)
Website www.kla-tencor.com

KLA-Tencor Corporation is an American manufacturing company based in Milpitas, California. It supplies process control and yield management products for the semiconductor, data storage, LED, and related nanoelectronics industries. The company's products, software and services are intended for all phases of integrated circuit production. [3]


KLA-Tencor was formed in April 1997 through the merger of KLA Instruments (KLA) and Tencor Instruments (Tencor), two long-time leaders in the semiconductor equipment industry. Prior to the merger, both businesses served a segment of the inspection and metrology area; with KLA focused on defect inspection solutions and Tencor placing its emphasis on metrology solutions. [3]

KLA was named after its founders, Ken Levy and Bob Anderson. The word “Tencor” came about because the founder of Tencor, Karel Urbanek, wanted a two syllable name that would be easy to remember.[3]

Since the merger in 1997, KLA-Tencor has acquired the following companies:[3]

• Amray Inc., 1998
• Nanopro GmbH, 1998
• The Quantox product line from Keithley Instruments, Inc, 1998
• VARS, 1998
• The Ultrapointe subsidiary of Uniphase Corporation, 1998
• ACME Systems Inc., 1999
• Fab Solutions, from ObjectSpace Inc., 2000
• FINLE Technologies, Inc., 2000
• Phase Metrics, 2001
• Candela Instruments, 2004
• Wafer Inspection Systems business of Inspex, Inc., 2004
• ADE Corporation, 2006
• OnWafer Technologies, 2007
• SensArray Corporation, 2007
• Therma-Wave Corporation, 2007
• ICOS Vision Systems Corporation NV, 2008
• Microelectronic Inspection Equipment (MIE) business unit of Vistec Semiconductor Systems, 2008
• Ambios Technology, 2010
• Luminescent Technologies, 2014

KLA-Tencor serves the semiconductor equipment industry and also a number of other industries, including the light emitting diode (LED), data storage and photovoltaic industries, as well as general materials research.


KLA-Tencor’s comprehensive portfolio of defect inspection and metrology equipment helps integrated circuit manufacturers manage yield throughout the entire fabrication process—from research and development to final volume production. These defect inspection and metrology equipment solutions are designed to help fabs accelerate their development and production ramp cycles, to achieve higher and more stable semiconductor die yields and to improve overall profitability. KLA-Tencor’s defect inspection and metrology equipment solutions are also used in a number of related industries, including wafer manufacturing, mask manufacturing, solar process development and control, medical device manufacturing and data storage manufacturing, and general materials research.[3]

Following is the list of current equipment and products that are organized by industry and application:[3]

• Front-End Defect Inspection
• Advanced Packaging
• Defect Review
• Metrology Inspection
• 5D Patterning Control Solution
• Lithography Software
• Wafer Manufacturing
• Reticle Manufacturing
• Data Storage Media/Head Manufacturing
• LED Manufacturing
• Compound Semiconductor Manufacturing
• Candela CS920
• MEMS Manufacturing
• Surface Profilometry and Metrology


  1. ^ a b c d e f g h "KLA TENCOR CORP 2013 Annual Report Form (10-K)" (XBRL). United States Securities and Exchange Commission. August 8, 2013. 
  2. ^ a b "KLA TENCOR CORP 2014 Q3 Quarterly Report Form (10-Q)" (XBRL). United States Securities and Exchange Commission. April 25, 2014. 
  3. ^ a b c d e f KLA Tencor Website, www.kla-tencor.com

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