PART I CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS With the exception of historical facts, the statements contained in this discussion are forward-looking statements, which are subject to the Safe Harbor provisions created by the Private Securities Litigation Reform Act of 1995. Such forward-looking statements include, but are not limited to, statements that relate to our future revenue, changing customer requirements, product development, demand, acceptance and market share, new orders, competitiveness, gross margins, levels of research and development (R&D), outsourcing plans and operating expenses, our management’s plans and objectives for our current and future operations, the effects of our restructurings and consolidation of operations and facilities, our ability to complete contemplated restructurings or consolidations on time or within anticipated costs, the levels of customer spending or R&D activities, general economic conditions, and the sufficiency of financial resources to support future operations and capital expenditures including our ability to generate cash and use that cash efficiently. Such statements are based on current expectations and are subject to risks, uncertainties and changes in condition, significance, value and effect, including those discussed below and under the heading “Risk Factors” within the section of this report entitled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and other documents we file from time to time with the Securities and Exchange Commission such as our quarterly reports on Form 10-Q and our current reports on Form 8-K. Such risks, uncertainties and changes in condition, significance, value and effect could cause actual results to differ materially from those expressed herein and in ways not readily foreseeable. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof and of information currently and reasonably known. We undertake no obligation to release the results of any revisions to these forward-looking statements which may be made to reflect events or circumstances which occur after the date hereof or to reflect the occurrence or effect of anticipated or unanticipated events. All references to fiscal years apply to our fiscal years, which ended June 26, 2005, June 27, 2004, and June 29, 2003. Item 1. Business Lam Research Corporation (Lam or the Company), a Delaware corporation, was founded in 1980 and is headquartered in Fremont, California. The mailing address for our principal executive offices is 4650 Cushing Parkway, Fremont, California 94538, and our telephone number is (510) 572-0200. Additional information about Lam is available on our web site at http://www.lamrc.com. Our Forms 10-K, Forms 10-Q, and Forms 8-K are available online at the Securities and Exchange Commission (SEC) web site on the Internet. The address of that site is http://www.sec.gov. We also make available free of charge the Forms 10-K, Forms 10-Q, and Forms 8-K and any amendments to those reports on our corporate web site at http://www.lamrc.com as soon as reasonably possible after we file them with or furnish them to the SEC. We design, manufacture, market, and service semiconductor processing equipment used in the fabrication of integrated circuits and are recognized as a major supplier of such equipment to the worldwide semiconductor industry. Semiconductor wafers are subjected to a complex series of process steps that result in the simultaneous creation of many individual integrated circuits. Our products selectively remove portions of various films from the wafer to create semiconductors. We leverage our expertise in these areas to develop intellectual property (IP) for integrated processing solutions. Etch Process Etch processes, which are repeated numerous times during the wafer fabrication cycle, are required to manufacture every type of semiconductor device produced today. To etch devices designed at current and future technology nodes, our etch systems employ Lam’s TCP’ high density and Dual Frequency Confined’ (DFC’) medium density plasma sources. The etch process defines linewidths and other microscopic and sub-microscopic features on integrated circuits. Plasma etching was developed to meet the demand for device geometries smaller than 3 microns. Plasma consists of charged and neutral species that react with exposed portions of the wafer surface to remove dielectric, metal, or polysilicon material and produce the finely delineated features and patterns of an integrated circuit. 2

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