<SUBMISSION>
<ACCESSION-NUMBER>0001206774-03-000343
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>2
<PERIOD>20030416
<ITEMS>7
<ITEMS>9
<FILING-DATE>20030423
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>LAM RESEARCH CORP
<CIK>0000707549
<ASSIGNED-SIC>3559
<IRS-NUMBER>942634797
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>0630
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>000-12933
<FILM-NUMBER>03659803
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>4650 CUSHING BLVD
<CITY>FREMONT
<STATE>CA
<ZIP>94538
<PHONE>5106590200
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>4650 CUSHING PARKWAY
<CITY>FREMONT
<STATE>CA
<ZIP>94538
</MAIL-ADDRESS>
</FILER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>d12525.htm
<TEXT>
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<p align="center"><font size="4"><strong>UNITED STATES<br>
SECURITIES AND EXCHANGE COMMISSION<br>
Washington, D.C. 20549</strong></font></p>


<HR align=center SIZE=2 width="25%">
<br>
<p align="center"><font size="5"><strong>FORM 8-K</strong></center></font></p>
<HR align=center SIZE=2 width="25%">


<p align="center"><font size="4"><strong>
               Current Report Pursuant to Section 13 or 15(d) of the
                      Securities Exchange Act of 1934
</strong></font></p>

<p align="center"><font size="3"><strong>
    Date of report (Date of earliest event reported):
<font color="FF0000"> April 16, 2003
</strong></font></p>
 <br>

<p align="center"><font size="6" color="#0000FF"><strong>
                          <u>LAM RESEARCH CORPORATION</u>
</strong></font><br>
<font size="2">
            <i>(Exact name of registrant as specified in its charter)</i>
</font></p>


<font size="3"><strong>
                         <CENTER><u>Delaware</u></CENTER>
</font></strong>
<font size="2">
                 <i><CENTER>(State of Other Jurisdiction of Incorporation)</CENTER></i>
</font></p>


<P>&nbsp;
<TABLE COLS=2 WIDTH="100%" >
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<TD>
<font size="3"><strong>
<CENTER><u>000-12933</u></CENTER>
</font></strong>
</TD>
<TD>
<font size="3"><strong>
<CENTER><u>94-2634797</u></CENTER>
</font></strong>
</TD>
</TR>
<TR>
<TD>
<font size="2">
<CENTER>&nbsp;<i>(Commission File Number)</i></CENTER>
</font>
</TD>

<TD>
<font size="2">
<CENTER><i>(IRS Employer Identification Number)</i></CENTER>
</font>
</TD>
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<p align="center"><font size="3"><strong>
                                     4650 Cushing Parkway<br>
                       <u>Fremont, California &nbsp;&nbsp;  94538
</strong></font></u><br>

<font size="2">
       <i> (Address of principal executive offices including zip code)</i>
</font></p>

<p align="center"><font size="3"><strong><u>
                                 (510) 572-0200
</strong></font></u><br>

<font size="2">
               <i>  (Registrant&#146;s telephone number, including area code)</i>
</font></p>

<p align="center"><font size="3"><strong>
                                 Not Applicable
</strong></font></u><br>


<font size="2">
          <i>(Former name or former address, if changed since last report)</i>
</font></p>



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<strong><I><P>Item 7.  Financial Statements and Exhibits</P>
</strong></I><P>&#9;(c)  &#9;Exhibits</P>








<P ALIGN="CENTER"><CENTER><TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=638>
<TR><TD WIDTH="30%" VALIGN="TOP">
<U><P>Exhibit No.</U></TD>
<TD WIDTH="70%" VALIGN="TOP">
<U><P>Description</U></TD>
</TR>
<TR><TD WIDTH="30%" VALIGN="TOP">
<P>99.1</TD>
<TD WIDTH="70%" VALIGN="TOP">
<P>Information Disclosed at Lam Research Corporation Q3 2003 Financial Release
          Conference Call on April 16, 2003
      </TD>

</TR>
</TABLE>
</CENTER></P>




<strong><I><P>Item 9.  Regulation FD Disclosure</P>
</strong></I><P>&#9; &#9;See Item 12</P>

<strong><I><P>Item 12.  Results of Operations and Financial Condition</P>
</strong></I>

<P>On April 16, 2003, Lam Research Corporation (the &#147;Company&#148;), held a conference call complementary to its financial press release for its fiscal 2003 third quarter. Certain information disclosed at the conference call that was in addition to information disclosed in the press release regarding the results of the three- and nine-month periods ended March 30, 2003 is attached hereto as Exhibit 99.1. The furnishing of such additional information is not intended to, and does not, constitute a determination or admission by the Company that such additional information is material, or that investors should consider this information before making an investment decision with respect to any security of the Company. The Company intends to file a single Item 12 Form 8-K for its future earnings announcements.</P>

<P>The information in this Current Report on Form 8-K, including the exhibit, is
furnished pursuant to Item 12 and shall not be deemed &#147;filed&#148; for the
purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or
otherwise subject to the liabilities under that Section. Furthermore, the
information in the Current Report on Form 8-K, including the exhibit, shall not
be deemed to be incorporated by reference into the filings of the Company under
the Securities Act of 1933, as amended. </p>

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<p align="center"><strong>
                                   SIGNATURES
</strong></p>
<p>     Pursuant to the requirement of the Security Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

<p>Date: April 23, 2003

<P>
<TABLE border=0 cellPadding=0 cellSpacing=0 width="100%">
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    <TD>&nbsp;</TD>
    <TD align=left>
                            LAM RESEARCH CORPORATION
</TD></TR></TABLE>


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    <TD width="2%"></TD>
    <TD width="60%"></TD></TR>
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    <TD>&nbsp;</TD>
    <TD>By:&nbsp;</TD>
    <TD align=left>
/s/ Mercedes Johnson
</TD></TR></TABLE>


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    <TD>&nbsp;</TD>
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    <TD>&nbsp;</TD>
    <TD align=left>
 Mercedes Johnson
</TD></TR>
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    <TD>&nbsp;</TD>
    <TD align=left><I>
Senior Vice President, Finance,Chief Financial Officer
and Chief Accounting Officer
  </I></TD></TR></TABLE></P>


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<U><P ALIGN="CENTER">EXHIBIT INDEX</P></U>

<P ALIGN="CENTER"><CENTER><TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=638>
<TR><TD WIDTH="30%" VALIGN="TOP">
<U><P>Exhibit No.</U></TD>
<TD WIDTH="70%" VALIGN="TOP">
<U><P>Description</U></TD>
</TR>
<TR><TD WIDTH="30%" VALIGN="TOP">
<P>99.1</TD>
<TD WIDTH="70%" VALIGN="TOP">
<P>Information Disclosed at Lam Research Corporation Q3 2003 Financial Release
          Conference Call on April 16, 2003
      </TD>
</TR>





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<TYPE>EX-99.1
<SEQUENCE>3
<FILENAME>ex99.htm
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<P ALIGN=LEFT><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Exhibit 99.1</B></FONT></P>
<P ALIGN=LEFT><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Information Disclosed at Lam Research Corporation Q3 2003 Financial<br> Release Conference Call on April 16, 2003</B></FONT><BR>
&nbsp;</P>
     </TD>
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     <TD WIDTH="5%" ALIGN="LEFT"><P ALIGN=LEFT><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&#149;&nbsp;&nbsp;</FONT></P></TD>
     <TD WIDTH="1%" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><P ALIGN=LEFT><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The Company&#146;s backlog was approximately $233 million at the March 2003 quarter-end.</FONT></P></TD>
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     <TD WIDTH="5%" ALIGN="LEFT"><P ALIGN=LEFT><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&#149;&nbsp;&nbsp;</FONT></P></TD>
     <TD WIDTH="1%" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><P ALIGN=LEFT><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Deferred revenues and deferred profits at March 30, 2003 were approximately $87 million and $47 million, respectively.</FONT></P></TD>
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