KLA Corporation Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Note 1. Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Note 8. Stock-Based Compensation Fair Value Assumptions and ESPP (Details)

v2.3.0.11

Note 8. Stock-Based Compensation Fair Value Assumptions and ESPP (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended			12 Months Ended
	Jun. 30, 2010	Dec. 31, 2009	Dec. 31, 2008	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
ESPP, Maximum Employee Subscription Rate				10.00%
ESPP, Offering Period In Months			24	6		6
ESPP, Discounted Purchase Price Percentage	85.00%	95.00%				85.00%
ESPP, Discount from Market Price, Offering Date	15.00%	5.00%				15.00%
ESPP Activities [Abstract]
Total Cash Received from Employees for the Issuance of Shares Under the ESPP				$ 30,085	$ 20,714	$ 30,306
Number of Shares Purchased by Employees through the ESPP				1,123,000	758,000	1,615,000
Tax Benefits Realized in Connection with the disqualifying Dispositions of Shares Purchased under the ESPP				$ 2,194	$ 994	$ 1,612
Weighted Average Fair Value Per Share Based on Black-Scholes Model				$ 7.41	$ 8.51	$ 11.06
Number of ESPP Shares Available for Future Issuance				3,500,000
ESPP Share Replenishment in Period	2,000,000			2,000,000	2,000,000	2,000,000
ESPP Maximum Annual Share Replenishment				2,000,000
Employee Stock Purchase Plan Member [Member]
ESPP, Fair Value Assumptions and Methodology [Abstract]
Expected stock price volatility				38.00%	35.00%	41.00%
Risk free interest rate				0.20%	0.20%	1.80%
Dividend yield				3.10%	1.60%	1.40%
Expected life of options (in years)				0.5	0.5	1.3

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The discounted percentage of the fair market value of the Company's common stock

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Espp Maximum Annual Share Replenishment

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Tax Benefits Realized From Espp

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Weighted Average Fair Value Per Share

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The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The discount rate from market value on offering date that participants pay for shares.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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The number of shares purchased on the open market during the period for issuance to employees under the plan.

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