Document:

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                                                                     EXHIBIT 4.6

                     Nissan Auto Receivables Corporation II
                              990 West 190th Street
                           Torrance, California 90502

                                                     Dated as of August 19, 2002

                           YIELD SUPPLEMENT AGREEMENT

Wells Fargo Bank Minnesota, National Association
Wells Fargo Center
Sixth and Marquette Avenue
MAC N9311-161
Minneapolis, MN 55479
Attn:  Asset Backed Securities Department

Nissan Auto Receivables 2002-C Owner Trust
In care of:  Wilmington Trust Company
Rodney Square North
1100 North Market Street
Wilmington, DE 19890
Attn:  Nissan Auto Receivables 2002-C Owner Trust

Ladies and Gentlemen:

               Nissan Auto Receivables Corporation II (the "Company") hereby
confirms arrangements made as of the date hereof with you, Wells Fargo Bank
Minnesota, National Association, as Indenture Trustee, and Wilmington Trust
Company, as Owner Trustee for the Nissan Auto Receivables 2002-C Owner Trust
(the "Trust"), for the benefit of the Noteholders, to be effective upon (i)
receipt by the Company of the enclosed copy of this letter agreement (the "Yield
Supplement Agreement"), executed by Nissan Motor Acceptance Corporation
("NMAC"), the Indenture Trustee and the Owner Trustee, (ii) execution of the
Purchase Agreement, dated as of the date hereof (the "Purchase Agreement"),
between the Company and NMAC, (iii) receipt by NMAC of the payment by the
Company of the purchase price under the Purchase Agreement, and (iv) the receipt
by the Company of the capital contribution of NMAC in connection with the
payment of the purchase price under the Purchase Agreement. Capitalized terms
used herein and not otherwise defined herein shall have the respective meanings
given to them in the Sale and Servicing Agreement, dated as of the date hereof,
among NMAC, as Servicer, the Company, and Nissan Auto Receivables 2002-C Owner
Trust, as Issuer (the "Sale and Servicing Agreement").

        1. On or prior to each Determination Date, the Servicer shall notify the
Company and the Owner Trustee of the "Yield Supplement Deposit" (as defined
below) for the related Distribution Date, the amount on deposit in the Yield
Supplement Account (as defined below), the Servicing Payment Deposit with
respect to the related Distribution Date and the amount of reinvestment income
during the related Collection Period on the Yield Supplement Account.

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The "Yield Supplement Deposit" means, with respect to any Distribution Date, the
amount by which (i) the aggregate amount of interest that would have been due
during the related Collection Period on all Yield Supplemented Receivables (as
defined below) if such Yield Supplemented Receivables bore interest at the
Required Rate (as defined below) exceeds (ii) the amount of interest accrued on
such Yield Supplemented Receivables at their respective APRs and due during such
Collection Period. "Required Rate" means, with respect to each Collection
Period, the sum of (i) the Servicing Rate plus (ii) the Class A-4 Interest Rate.
"Yield Supplemented Receivable" means any Receivable that has an APR less than
the Required Rate.

        2. On or before the date hereof, the Owner Trustee shall establish and
maintain with the Securities Intermediary and pledge to the Indenture Trustee a
segregated trust account in the name of the Indenture Trustee for the benefit of
the Noteholders (the "Yield Supplement Account") in accordance with the
Securities Account Control Agreement to secure the payment of interest on the
Notes, or such other account as may be acceptable to the Rating Agencies, and
the Trust hereby grants to the Indenture Trustee for the benefit of the
Noteholders a first priority security interest in the Yield Supplement Account
and the monies on deposit and the other property that from time to time comprise
the Yield Supplement Account (including the Initial Yield Supplement Amount),
and any and all proceeds thereof (collectively, the "Yield Supplement Account
Property"). The Indenture Trustee shall possess all of the rights of a secured
party under the UCC with respect thereto. The Yield Supplement Account Property
and the Yield Supplement Account shall be under the sole dominion and control of
the Indenture Trustee. Neither the Company, the Trust nor any Person claiming
by, through or under the Company or the Trust shall have any right, title or
interest in, any control over the use of, or any right to withdraw from amounts
from, the Yield Supplement Account Property or the Yield Supplement Account. All
Yield Supplement Account Property in the Yield Supplement Account shall be
applied by the Relevant Trustee as specified in this Yield Supplement Agreement
and the Sale and Servicing Agreement. The Relevant Trustee shall, not later than
5:00 P.M., New York City time on the Business Day preceding each Distribution
Date, withdraw from the Yield Supplement Account and deposit in the Collection
Account an amount equal to the Yield Supplement Deposit plus the amount of
reinvestment income on the Yield Supplement Account for such Distribution Date.

        3. On or prior to the date hereof, the Company shall make a capital
contribution to the Trust of $9,716,309.70 (the "Initial Yield Supplement
Amount"), by depositing such amount into the Yield Supplement Account. The
amount required to be on deposit in the Yield Supplement Account on the date of
issuance of the Notes and for each Distribution Date until the Notes of all
Classes have been paid in full or the Indenture is otherwise terminated (the
"Required Yield Supplement Amount"), as determined by the Servicer and notified
to the Relevant Trustee, means an amount equal to the lesser of (i) the
aggregate amount of each Yield Supplement Deposit that will become due on each
future Distribution Date, assuming that payments on the Receivables are made on
their scheduled due dates, no Receivable becomes a prepaid Receivable and a
discount rate of 1.25%, and (ii) the Initial Yield Supplement Amount. The
Required Yield Supplement Amount may decline as a result of prepayments or
repayments in full of the Receivables. The Relevant Trustee shall have no duty
or liability to determine the Required Yield Supplement Amount and may fully
rely on the determination thereof by the Servicer. If, on any Distribution Date,
the funds in the Yield Supplement Account are in excess of the Required Yield
Supplement Amount for such Distribution Date after giving effect to all

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distributions to be made on such Distribution Date, the Relevant Trustee shall
deposit the amount of such excess into the Collection Account for distribution
by the Relevant Trustee in accordance with the terms of Sections 5.06(c), (d),
(e) and (h) of the Sale and Servicing Agreement. The Yield Supplement Account
shall be part of the Trust. It is the intent of the parties that the Yield
Supplement Account Property be treated as property of the Trust for all federal,
state and local income and franchise tax purposes. The provisions of this Yield
Supplement Agreement should be interpreted accordingly. Further, the Trust shall
include in its gross income all income earned on the Yield Supplement Account
Property and the Yield Supplement Account.

        4. All or a portion of the Yield Supplement Account may be invested and
reinvested in the manner specified in Section 5.08 of the Sale and Servicing
Agreement in accordance with written instructions from the Servicer or the
Secured Party (as defined in the Securities Account Control Agreement) under the
Securities Account Control Agreement, as the case may be. All such investments
shall be made in the name of the Relevant Trustee. Earnings on investment of
funds in the Yield Supplement Account shall be deposited in the Collection
Account on each Distribution Date, and losses and any investment expenses shall
be charged against the funds on deposit therein. Upon payment in full of the
Notes under the Indenture, as directed in writing by the Servicer, the Indenture
Trustee will release any amounts remaining on deposit in the Yield Supplement
Account to the Owner Trustee for the benefit of the Certificateholders, which
amounts the Owner Trustee shall deposit into the Trust Collection Account, and
the Company shall have no further obligation to pay to the Servicer the
Servicing Payment Deposit. If for any reason the Yield Supplement Account is no
longer an Eligible Deposit Account, the Relevant Trustee shall promptly cause
the Yield Supplement Account to be moved to another institution or otherwise
changed so that the Yield Supplement Account becomes an Eligible Deposit
Account.

        5. Our agreements set forth in this Yield Supplement Agreement are our
primary obligations and such obligations are irrevocable, absolute and
unconditional, shall not be subject to any counterclaim, setoff or defense
(other than full and strict compliance by us with our obligations hereunder) and
shall remain in full force and effect without regard to, and shall not be
released, discharged or in any way affected by, any circumstances or condition
whatsoever.

        6. This Yield Supplement Agreement shall not be amended, modified or
terminated except in accordance with the provisions for amendments,
modifications and terminations of the Sale and Servicing Agreement as set forth
in Section 10.01 of the Sale and Servicing Agreement.

        7. THIS YIELD SUPPLEMENT AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED
IN ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF NEW YORK, WITHOUT
REFERENCE TO ITS CONFLICT OF LAW PROVISIONS (OTHER THAN SECTION 5-1401 OF THE
GENERAL OBLIGATIONS LAW OF THE STATE OF NEW YORK), AND THE OBLIGATIONS, RIGHTS
AND REMEDIES OF THE PARTIES UNDER THIS AGREEMENT SHALL BE DETERMINED IN
ACCORDANCE WITH SUCH LAWS.

        8. Except as otherwise provided herein, all notices pursuant to this
Yield Supplement Agreement shall be in writing, personally delivered, sent by
telecopier, sent by courier or mailed by certified mail, return receipt
requested, and shall be effective upon receipt thereof. All notices shall be
directed as set forth below, or to such other address or telecopy

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number or to the attention of such other person as the relevant party shall have
designated for such purpose in a written notice.

               The Company:

               Nissan Auto Receivables Corporation II
               990 West 190th Street
               Torrance, California  90502
               Attention:  Treasurer
               Facsimile No.: 310-324-2542

               Indenture Trustee:

               Wells Fargo Bank Minnesota, National Association
               Wells Fargo Center
               Sixth and Marquette Avenue
               MAC N9311 -- 161
               Minneapolis, MN 55479
               Attn:  Asset Backed Securities Department
               Facsimile No.: 612-667-3464

               Trust:

               Nissan Auto Receivables 2002-C Owner Trust
               In care of:  Wilmington Trust Company
               Rodney Square North
               1100 North Market Street
               Wilmington, DE 19890
               Attn:  Nissan Auto Receivables 2002-C Owner Trust

        10. This Yield Supplement Agreement may be executed in one or more
counterparts and by the different parties hereto on separate counterparts, all
of which shall be deemed to be one and the same document.

        11. Each of the parties hereto agrees and acknowledges that all of the
rights and interests of the Indenture Trustee hereunder shall be automatically
transferred to the Owner Trustee, and the Owner Trustee shall succeed to all
such rights and interests, upon the payment in full of the Notes in accordance
with the terms of the Indenture and the Sale and Servicing Agreement.

        If the foregoing satisfactorily sets forth the terms and conditions of
our agreement, please indicate your acceptance thereof by signing in the space
provided below and returning to us the enclosed duplicate original of this
letter.

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                                 Very truly yours,

                                 NISSAN AUTO RECEIVABLES CORPORATION II

                                 By:
                                    -----------------------------------
                                    Name:  Joji Tagawa
                                    Title: Treasurer

Agreed and accepted as of August 19, 2002

NISSAN MOTOR ACCEPTANCE CORPORATION

By:
   ---------------------------------------
   Name:  Katsumi Ishii
   Title: President

WELLS FARGO BANK MINNESOTA, NATIONAL ASSOCIATION,
  AS INDENTURE TRUSTEE

By:
   ---------------------------------------
   Name:
   Title:

NISSAN AUTO RECEIVABLES 2002-C OWNER TRUST

By:  WILMINGTON TRUST COMPANY,
not in its individual capacity but solely as
Owner Trustee on behalf of the Trust

By:
   ---------------------------------------
   Name:
   Title:

                                      S-1<PAGE>
                                                                    Exhibit 10.5
                                 March ___, 2002

Peter J. Simone
61 Lehigh Road
Wellesley, MA 02482

            Re:   Employment Agreement

Dear Pete:

      Upon execution by you, this letter will constitute your employment
agreement ("Agreement") with Speedfam-IPEC, Inc., (the "Company").

1.    Term. This Agreement will become effective __________________, 2002 and
      will terminate on _____________, 2003, [unless mutually extended by the
      parties in writing].

2.    Positions with the Company. During the term of this Agreement, you will
      serve as Chairman of the Board of the Company. You will faithfully and
      diligently perform all duties commensurate with these positions, including
      those duties directed by the Board of Directors of the Company (the
      "Board"), as well as those set forth in the Bylaws of the Company that
      relate to such position. Upon any termination of your employment, you will
      be deemed to resign as a director and Chairman of the Board, unless the
      Board determines otherwise at such time.

3.    Compensation. You will receive the following compensation for your
      services during your term of employment:

      (a)   You will receive $125,000 per year (pro rated as appropriate). Your
            salary will be paid in equal installments in accordance with the
            Company's salary payment policies as in effect from time to time;
            and

      (b)   You will receive such other compensation as may from time to time be
            granted to you by the Board at its sole discretion, including
            options or bonuses as may be approved by the Board or the
            Compensation Committee thereof.

4.    Expenses. The Company will pay or reimburse you for all ordinary and
      necessary business expenses incurred or paid by you in furtherance of the
      Company's business, including travel to and from your home on Company
      business, all in accordance with the Company's policies and procedures of
      general application.

5.    Termination by Voluntary Resignation, Death, Disability or Cause.

      (a)   In the event that you voluntarily resign from the Company, you die
            or you become disabled (as reasonably determined by the Board), or
            in the event you are terminated for Cause, you will be entitled to
            receive that compensation due you through the date of your
            resignation, together with any COBRA (at your cost) or other
            benefits required by law.
<PAGE>
      (b)   "Cause" shall mean, in the reasonable judgment of the Board:

            a.    you materially breach this Agreement or any other agreement
                  with the Company;

            b.    you fail to follow any reasonable and lawful direction of the
                  Board of Directions of the Company or materially violate any
                  reasonable rule or regulation established by the Company from
                  time to time regarding conduct of its business;

            c.    you engage in any act of dishonesty with respect to the
                  Company;

            d.    you engage in criminal conduct (whether related to or not
                  related to your employment); or

            e.    you fail to perform your duties satisfactorily.

6.    Termination by the Company Without Cause. Subject to Paragraph 7 below, in
      the event that you are terminated by the Company without Cause, you will
      receive your then current salary for the unexpired term.

7.    Termination in Connection with a Change in Control. In the event of a
      Change of Control (as defined in the Company's 2001 Nonstatutory Stock
      Option Plan), you will be entitled to receive the following:

      (a)   Immediately prior to the effective date of a Change of Control, all
            stock options granted to you and not otherwise vested shall vest and
            become exercisable by you for a minimum of 90 days (or, if longer,
            the term thereof) so that you may participate in the Change of
            Control transaction to the fullest extent feasible, provided,
            however, that if the acceleration of your options would cause a
            charge to the Company's earnings, then at the Company's option it
            may offer you a consulting position during which your options would
            continue to vest;

      (b)   You will be entitled to a lump sum payment equal to your last year's
            salary; and

      (c)   [Upon any termination of your employment after a Change of Control,
            for a period of eighteen months from the date of your termination,
            the Company will pay for the COBRA benefits due you.]

8.    Covenant Not to Compete.

      (a)   For a period of one year from any termination of your employment
      hereunder, (or, if later, upon conclusion of your service as a
      consultant), you shall not, directly or indirectly, for your own benefit
      or for, with or through any other individual, firm, corporation,
      partnership or other entity, whether acting in an individual, fiduciary or
      other capacity, own, manage, operate, control, advise, invest in (except
      as a 1% or less shareholder of a public company), loan money to, or
      participate or assist in the ownership, management, operation or control
      of or be associated as a director, officer, employee, partner, consultant,
      advisor, creditor, agent, independent contractor or otherwise with, or
      acquiesce in the use of your name by, any business enterprise that is in

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<PAGE>
      direct competition with the Company or any subsidiary within the United
      States of America or any other country that the Company conducts business
      at the time of your termination.

      (b)   In addition to the foregoing, at all times during the period of your
      employment and for one year after any termination thereof (or, if later,
      upon conclusion of your services as a consultant), you will not, directly
      or indirectly (as described above), for your benefit or for, with or
      through any business, hire, employ, solicit, or otherwise encourage or
      entice any of the Company's (or subsidiary's) employees or consultants to
      leave or terminate their employment with the Company.

      (c)   You and the Company consider the restrictions contained in
      Paragraphs 8(a) and 8(b) above to be reasonable for the purpose of
      preserving the Company's proprietary rights and interests. If a court
      makes a final judicial determination that any such restrictions are
      unreasonable or otherwise unenforceable against you, you and the Company
      hereby authorize such court to amend this Agreement so as to produce the
      broadest, legally enforceable agreement, and for this purpose the
      restrictions on time period, geographical area and scope of activities set
      forth in Paragraphs 8(a) and 8(b) above are divisible; if the court
      refuses to do so, you and the Company hereto agree to modify the
      provisions held to be unenforceable to preserve each party's anticipated
      benefits thereunder to the maximum extent legal.

      (d)   You acknowledge and agree that the Company's remedies at law for
      breach or threatened breach of any of the provisions of this Paragraph 8
      would be inadequate. Therefore, you agree that in the event of a breach or
      threatened breach by you of the provisions in this Paragraph 8, the
      Company shall be entitled to, in addition to its remedies at law and
      without posting any bond, equitable relief in the form of specific
      performance, a temporary restraining order, a temporary or permanent
      injunction, or any other equitable remedy that may then be available.

9.    Personal Rights and Obligations. This Agreement and all rights and
      obligations hereunder are personal and shall not be assignable by either
      you or the Company except as provided in this subparagraph, and any
      purported assignment in violation thereof shall be null and void. Any
      person, firm or corporation succeeding to the business of the Company by
      merger, consolidation, purchase of assets or otherwise, shall assume by
      contract or operation of law the obligations of the Company hereunder and
      in such a case you shall continue to honor this Agreement with such
      business substituted for the Company as the employer.

10.   Notices. Any notice, election or communication to be given under this
      Agreement shall be in writing and delivered in person or deposited,
      certified or registered, in the United States mail, postage prepaid,
      addressed as follows:

      If to the Company:      Speedfam-IPEC, Inc.
                              305 North 54th Street
                              Chandler, AZ 85226-2416
                              Attn:  Chief Executive Officer

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<PAGE>
      If to you:     Peter J. Simone
                     61 Lehigh Road
                     Wellesley, MA 02482

      or to such other addresses as the Company or you may from time to time
      designate by notice hereunder. Notices will be effective upon delivery in
      person or upon receipt of any facsimile or e-mail, or at midnight on the
      fourth business day after the date of mailing, if mailed.

11.   Entire Agreement. Except for any [confidentiality agreement] or option
      grants to which you are subject, this Agreement constitutes and embodies
      the full and complete understanding and agreement of the Company and you
      with respect to your employment by the Company and supersedes all prior
      understandings or agreements whether oral or in writing. This Agreement
      may be amended only by a writing signed by you and the Company. This
      Agreement may be executed in any number of counterparts, each of which
      will be considered a duplicate original.

12.   Binding Nature of Agreement. This Agreement shall be binding upon and
      inure to the benefit of the Company and its successors and assigns and
      shall be binding upon you, your heirs and legal representatives.

13.   Arbitration. Any controversy relating to this Agreement or relating to the
      breach hereof shall be settled by arbitration conducted in Phoenix,
      Arizona in accordance with the Commercial Arbitration Rules of the
      American Arbitration Association then in effect. The award rendered by the
      arbitrator(s) shall be final and judgment upon the award rendered by the
      arbitrator(s) may be entered upon it in any court having jurisdiction
      thereof. The arbitrator(s) shall possess the powers to issue mandatory
      orders and restraining orders in connection with such arbitration. The
      expenses of the arbitration shall be borne by the losing party unless
      otherwise allocated by the arbitrator(s). This agreement to arbitrate
      shall be specifically enforceable under the prevailing arbitration law.
      During the continuance of any arbitration proceedings, the parties shall
      continue to perform their respective obligations under this Agreement.
      Nothing in this Agreement shall preclude the Company or any affiliate or
      successor from seeking equitable relief, including injunction or specific
      performance, in any court having jurisdiction, in connection with the
      non-compete provisions herein and any obligations of confidentiality.

14.   Governing Law. This Agreement shall be governed by and interpreted in
      accordance with the laws of the State of Arizona.

15.   Withholding and Release. You acknowledge and agree that payments made to
      you hereunder may be subject to withholding. You further acknowledge and
      agree that payment of any of the benefits to be provided to you under this
      Agreement following any termination of your employment is subject to your
      compliance with any reasonable and lawful policies or procedures of the
      Company relating to employee severances, including the execution and
      delivery by you of a release reasonably satisfactory to the Company of any
      and all claims that you may have against the Company or related persons,
      except for

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      (i) the continuing obligations provided herein, and (ii) for any
      continuing obligations of indemnification due you as an officer or
      director (or a former officer or director).

                                    Very truly yours,

                                    --------------------------
                                    Richard J. Faubert
                                    Chief Executive Officer

ACCEPTED:

------------------------
Peter J. Simone

Date:

------------------------

                                      -5-

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