1
                                 AMENDMENT NO. 1
                                       TO
                      AMENDED AND RESTATED CREDIT AGREEMENT


            AMENDMENT dated as of May 7, 1997 to the Amended and Restated Credit
Agreement dated as of April 4, 1997 (the "AMENDMENT AND RESTATEMENT") among
Applied Materials, Inc. (the "COMPANY"), the BANKS party thereto (the "BANKS")
and MORGAN GUARANTY TRUST COMPANY OF NEW YORK, as Agent (the "AGENT").

                              W I T N E S S E T H :

            WHEREAS, the parties hereto desire to amend the Amendment and
Restatement to change the date of the Master Lease (as defined therein) from
April 11, 1997 to April 30, 1997.

            NOW, THEREFORE, the parties hereto agree as follows:

            SECTION 1. Definitions; References. Unless otherwise specifically
defined herein, each term used herein which is defined in the Amendment and
Restatement has the meaning assigned to such term in the Amendment and
Restatement. Each reference to "hereof", "hereunder", "herein" and "hereby" and
each other similar reference and each reference to "this Agreement" and each
other similar reference contained in the Amendment and Restatement shall, after
this Amendment becomes effective, refer to the Amendment and Restatement as
amended hereby.

            SECTION 2. Definition of Lease Agreements. The definition of "Lease
Agreements" in Section 3(d) of the Amendment and Restatement is amended by
changing the date "April 11, 1997" to "April 30, 1997".

            SECTION 3.  Governing Law.  This Amendment shall be governed by and
construed in accordance with the laws of the State of New York.

            SECTION 4. Counterparts. This Amendment may be signed in any number
of counterparts, each of which shall be an original, with the same effect as if
the signatures thereto and hereto were upon the same instrument.

            SECTION 5. Effectiveness. This Amendment shall become effective on
the date when the Agent shall have received from each of the Borrower and the
Required Banks a counterpart hereof signed by such party or facsimile or other
written confirmation (in form satisfactory to the Agent) that such party has
signed a counterpart hereof.



   2
            IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be duly executed by their respective authorized officers as of the day and year
first above written.
                             


                                  APPLIED MATERIALS, INC.

                                  By /s/ Gerald F. Taylor
                                     --------------------------------------
                                  Name: Gerald F. Taylor
                                  Title: Senior Vice President and Chief
                                         Financial Officer

                                  By /s/ Nancy H. Handel
                                     --------------------------------------
                                  Name: Nancy H. Handel
                                  Title: Vice President, Corporate Finance and
                                         Treasurer

                                  MORGAN GUARANTY TRUST
                                    COMPANY OF NEW YORK

                                  By /s/ Kathryn Sayko-Yanes
                                     --------------------------------------
                                  Title: Vice President


                                  BANK OF AMERICA NATIONAL TRUST
                                     AND SAVINGS ASSOCIATION

                                  By /s/ Kevin McMahon
                                     --------------------------------------
                                  Title: Managing Director

                                  UNION BANK OF CALIFORNIA, N.A.

                                  By /s/ Wanda Headrick
                                     --------------------------------------
                                  Title: Vice President

                                  ABN AMRO BANK N.V. SAN
                                    FRANCISCO INTERNATIONAL
                                    BRANCH

                                  By /s/ Robin S. Yim
                                     --------------------------------------
                                  Title: Group Vice President

                                  By /s/ Candace J. Hsu
                                     --------------------------------------
                                  Title: Corporate Banking Officer



                                       2
   3
                                  BANQUE NATIONALE DE PARIS
                     
 
                                  By /s/ Rafael C. Lumanlan
                                     --------------------------------------
                                  Title: Vice President
                     
                                  By /s/ Charles Day
                                     --------------------------------------
                                  Title:  Assistant Vice President
                     
                     
                                  CITICORP USA, INC.
                     
                                  By /s/ David L. Harris
                                     --------------------------------------
                                  Title: Vice President
                     
                     
                                  CREDIT SUISSE FIRST BOSTON
                     
                                  By /s/ David J. Worthington
                                     --------------------------------------
                                  Title: Managing Director
                     
                                  By /s/ Marilou Palenzuela
                                     --------------------------------------
                                  Title: Vice President
                     
                     
                                  DEUTSCHE BANK AG, NEW YORK
                                    AND/OR CAYMAN ISLANDS
                                    BRANCHES
                     
                                  By /s/ Ralf Hoffmann
                                     --------------------------------------
                                  Title: Vice President
                     
                                  By /s/ Andreas Neumeier
                                     --------------------------------------
                                  Title: Vice President
                     
                     
                                  MELLON BANK, N.A.
                     
                                  By /s/ Edwin H. Wiest
                                     --------------------------------------
                                  Title: First Vice President
                     


                                       3