Exhibit 99.1


      CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
    PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF
                         THE SARBANES-OXLEY ACT OF 2002

         I, Robert H. Swanson, Jr., certify, pursuant to 18 U.S.C. Section 1350,
         as adopted pursuant to Section 906 of the  Sarbanes-Oxley  Act of 2002,
         that the Quarterly Report of Linear Technology Corporation on Form 10-Q
         for the fiscal  quarter  ended March 30, 2003 fully  complies  with the
         requirements  of Section 13(a) or 15(d) of the Securities  Exchange Act
         of 1934 and that information contained in such Quarterly Report on Form
         10-Q fairly presents in all material  respects the financial  condition
         and results of operations of Linear Technology Corporation.


                                               By:    /s/ Robert H. Swanson, Jr.
                                               ---------------------------------
                                               Name:  Robert H. Swanson, Jr.
                                               Title: Chief Executive Officer


         I, Paul  Coghlan,  certify,  pursuant  to 18 U.S.C.  Section  1350,  as
         adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that
         the Quarterly  Report of Linear  Technology  Incorporation on Form 10-Q
         for the fiscal  quarter ended March 30, 2002,  2003 fully complies with
         the  requirements of Section 13(a) or 15(d) of the Securities  Exchange
         Act of 1934 and that information  contained in such Quarterly Report on
         Form 10-Q  fairly  presents  in all  material  respects  the  financial
         condition and results of operations of Linear Technology Corporation.


                                               By:    /s/ Paul Coghlan
                                               ---------------------------------
                                               Name:  Paul Coghlan
                                               Title: Chief Financial Officer


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