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                                                                 EXHIBIT 10.14.3
                               REDWOOD TRUST, INC.

                              AMENDED AND RESTATED

                    1994 EXECUTIVE AND NON-EMPLOYEE DIRECTOR

                                STOCK OPTION PLAN

                          (Last Amended March 4, 1999)

Section 1. General Purpose of Plan; Definitions.

        The name of this plan is the Redwood Trust, Inc. Amended and Restated
1994 Executive and Non-Employee Director Stock Option Plan (the "Plan"). The
Plan was adopted by the Board on June 23, 1994, subject to the approval of the
Company stockholders, which approval was obtained on June 23, 1994. The Board
approved amendments to the Plan on March 8, 1996 which became effective upon
approval by the Company's stockholders on June 14, 1996. The Board approved
additional non-material amendments on December 13, 1996, June 12, 1997 and June
4, 1998, all of which became effective on such respective dates. The purpose of
the Plan is to enable the Company and its Subsidiaries to obtain and retain
competent personnel who will contribute to the Company's success by their
ability, ingenuity and industry, to give the Company's non-employee directors a
proprietary interest in the Company and to provide incentives to the
participating directors, officers and other key employees, and agents and
consultants that are linked directly to increases in stockholder value and will
therefore inure to the benefit of all stockholders of the Company.

        For purposes of the Plan, the following terms shall be defined as set
forth below:

        (1) "Accrued DERs" means DERs with the accrual rights described in
Section 5(11).

        (2) "Administrator" means the Board, or if the Board does not administer
the Plan, the Committee in accordance with Section 2.

        (3) "Board" means the Board of Directors of the Company.

        (4) "Code" means the Internal Revenue Code of 1986, as amended from time
to time, or any successor thereto.

        (5) "Committee" means the Compensation Committee of the Board, which
shall be composed entirely of individuals who meet the qualifications to be a
"Non-Employee Director" as defined in Rule 16b-3 ("Rule 16b-3) as promulgated by
the Securities and Exchange Commission (the "Commission") under the Securities
Exchange Act of 1934 (the "Act"), and as such Rule may be amended from time to
time, or any successor definition adopted by the Commission, or any other
Committee the Board may subsequently appoint to administer the Plan. If at any
time the Board shall not administer the Plan, then the functions of the Board
specified in the Plan shall be exercised by the Committee.

        (6) "Company" means Redwood Trust, Inc., a corporation organized under
the laws of the State of Maryland (or any successor corporation).

        (7) "Current-pay DERs" means DERs with the current-pay rights described
in Section 5(11).

        (8) "DERs" shall mean Accrued DERs and Current-pay DERs.

        (9) "Deferred Stock" means an award granted pursuant to Section 7 of the
right to receive Stock at the end of a specified deferral period.

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        (10) "Disability" means permanent and total disability as determined
under the Company's disability program or policy.

        (11) "Effective Date" shall mean the date provided pursuant to Section
12.

        (12) "Eligible Employee" means an employee of the Company or any
Subsidiary eligible to participate in the Plan pursuant to Section 4.

        (13) "Eligible Non-Employee Director" means a member of the Board or the
board of directors of any Subsidiary who is not a bona fide employee of the
Company or any Subsidiary and who is eligible to participate in the Plan
pursuant to Section 5A.

        (14) "Fair Market Value" means, as of any given date, with respect to
any awards granted hereunder, at the discretion of the Administrator and subject
to such limitations as the Administrator may impose, (A) the closing sale price
of the Stock on the next preceding business day as reported in the Western
Edition of the Wall Street Journal Composite Tape, or (B) the average of the
closing price of the Stock on each day on which the Stock was traded over a
period of up to twenty trading days immediately prior to such date, or (C) if
the Stock is not publicly traded, the fair market value of the Stock as
otherwise determined by the Administrator in the good faith exercise of its
discretion.

        (15) "Incentive Stock Option" means any Stock Option intended to be
designated as an "incentive stock option" within the meaning of Section 422 of
the Code.

        (16) "Limited Stock Appreciation Right" means a Stock Appreciation Right
that can be exercised only in the event of a "Change of Control" (as defined in
Section 10 below).

        (17) "Non-Employee Director" shall have the meaning set forth in Rule
16b-3.

        (18) "Non-Qualified Stock Option" means any Stock Option that is not an
Incentive Stock Option, including any Stock Option that provides (as of the time
such option is granted) that it will not be treated as an Incentive Stock
Option.

        (19) "Parent Corporation" means any corporation (other than the Company)
in an unbroken chain of corporations ending with the Company, if each of the
corporations in the chain (other than the Company) owns stock possessing 50% or
more of the combined voting power of all classes of stock in one of the other
corporations in the chain.

        (20) "Participant" means any Eligible Employee or any consultant or
agent of the Company or any Subsidiary selected by the Committee, pursuant to
the Administrator's authority in Section 2, to receive grants of Stock Options,
DERs, Stock Appreciation Rights, Limited Stock Appreciation Rights, Restricted
Stock awards, Deferred Stock awards, Performance Shares or any combination of
the foregoing, or any Eligible Non-Employee Director eligible to receive grants
of Non-Qualified Stock Options and DERs pursuant to Section 5A below.

        (21) "Performance Share" means an award of shares of Stock granted
pursuant to Section 7 that is subject to restrictions based upon the attainment
of specified performance objectives.

        (22) "Restricted Stock" means an award granted pursuant to Section 7 of
shares of Stock subject to restrictions that will lapse with the passage of
time.

        (23) "Stock" means the common stock, $0.01 par value, of the Company.

        (24) "Stock Appreciation Right" means the right pursuant to an award
granted under Section 6 to receive an amount equal to the difference between (A)
the Fair Market Value, as of the date such Stock Appreciation

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Right or portion thereof is surrendered, of the shares of Stock covered by such
right or such portion thereof, and (B) the aggregate exercise price of such
right or such portion thereof.

        (25) "Stock Option" means an option to purchase shares of Stock granted
pursuant to Section 5 or Section 5A.

        (26) "Subsidiary" means (A) any corporation (other than the Company) in
an unbroken chain of corporations beginning with the Company, if each of the
corporations (other than the last corporation) in the unbroken chain owns stock
possessing 50% or more of the total combined voting power of all classes of
stock in one of the other corporations in the chain or (B) except for purposes
of determining eligibility for receipt of Incentive Stock Options, any
corporation or other type of entity (a "company") (other than the Company) in an
unbroken chain of companies beginning with the Company, if each of the companies
(other than the last company) in the unbroken chain owns stock or other forms of
equity investment (i) possessing 50% or more of the total combined voting power
of all classes of stock or other forms of equity in one of the other companies
in the chain or (ii) representing 50% or more of the total value of all classes
of stock or other forms of equity in one of the other companies in the chain.

Section 2. Administration.

        The Plan shall be administered by the Board or by a Committee appointed
by the Board, which shall serve at the pleasure of the Board; provided, however,
that at all times when the Company is subject to the reporting requirements of
the Securities Exchange Act of 1934, as amended, the Plan shall be administered
by the Committee appointed by the Board.

        The Administrator shall have the power and authority to grant to
Eligible Employees and consultants or agents of the Company or any Subsidiary,
pursuant to the terms of the Plan: (a) Stock Options (with or without DERs), (b)
Stock Appreciation Rights or Limited Stock Appreciation Rights, (c) Restricted
Stock, (d) Deferred Stock, (e) Performance Shares or (f) any combination of the
foregoing.

        In particular, the Administrator shall have the authority:

        (a) to select those employees of the Company or any Subsidiary who shall
be Eligible Employees;

        (b) to determine whether and to what extent Stock Options (with or
without DERs), Stock Appreciation Rights, Limited Stock Appreciation Rights,
Restricted Stock, Deferred Stock, Performance Shares or a combination of the
foregoing, are to be granted to Eligible Employees or any consultant or agent of
the Company or any Subsidiary hereunder;

        (c) to determine the number of shares to be covered by each such award
granted hereunder;

        (d) to determine the terms and conditions, not inconsistent with the
terms of the Plan, of any award granted hereunder (including, but not limited
to, (x) the restricted period applicable to Restricted or Deferred Stock awards
and the date or dates on which restrictions applicable to such Restricted or
Deferred Stock shall lapse during such period, and (y) the performance goals and
periods applicable to the award of Performance Shares); and

        (e) to determine the terms and conditions, not inconsistent with the
terms of the Plan, which shall govern all written instruments evidencing the
Stock Options, DERs, Stock Appreciation Rights, Limited Stock Appreciation
Rights, Restricted Stock, Deferred Stock, Performance Shares or any combination
of the foregoing.

        The Administrator shall have the authority, in its discretion, to adopt,
alter and repeal such administrative rules, guidelines and practices governing
the Plan as it shall from time to time deem advisable; to interpret the terms
and provisions of the Plan and any award issued under the Plan (and any
agreements relating thereto); and to otherwise supervise the administration of
the Plan.

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        All decisions made by the Administrator pursuant to the provisions of
the Plan shall be final and binding on all persons, including the Company, any
Subsidiaries and the Participants.

        Notwithstanding anything to the contrary herein, no award hereunder may
be made to any Participant to the extent that, following such award, the shares
subject or potentially subject to such Participant's control (including, but not
limited to, (i) shares of the Company's equity stock owned by the Participant,
(ii) Stock Options, whether or not then exercisable, held by the Participant to
purchase additional such shares, (iii) Restricted Stock, Deferred Stock and
Performance Share awards to the Participant, whether or not then vested, and
(iv) Accrued DERs credited to the Participant) would constitute more than 9.8%
of the outstanding capital stock of the Company.

Section 3. Stock Subject to Plan.

        The total number of shares of Stock reserved and available for issuance
under the Plan shall be 500,000; provided, however, that from and after such
time as the number of outstanding shares of Stock as reflected on the Company's
quarterly or year-end balance sheet exceeds 6,000,000 (including treasury shares
but not including adjustments in the event of changes in the corporate structure
of the Company as provided below in this Section 3), the total number of shares
of Stock reserved and available for issuance under the Plan shall automatically
be increased so as to equal fifteen (15) percent of the number of then
outstanding shares of Stock, and provided further, that no more than 500,000
shares of Stock shall be cumulatively available for Incentive Stock Options. At
all times, the number of shares reserved and available for issuance hereunder as
so determined from time to time shall be decreased by virtue of awards granted
and outstanding or exercised hereunder.

        To the extent that (i) a Stock Option or DER expires or is otherwise
terminated without being exercised, or (ii) any shares of Stock subject to any
Restricted Stock, Deferred Stock or Performance Share award granted hereunder
are forfeited, such shares shall again be available for issuance in connection
with future awards under the Plan. If any shares of Stock have been pledged as
collateral for indebtedness incurred by a Participant in connection with the
exercise of a Stock Option and such shares are returned to the Company in
satisfaction of such indebtedness, such shares shall again be available for
issuance in connection with future awards under the Plan.

        In the event of any merger, reorganization, consolidation,
recapitalization, Stock dividend, or other change in corporate structure
affecting the Stock, a substitution or adjustment may be made in (i) the
aggregate number of shares reserved for issuance under the Plan, and (ii) the
kind, number and option price of shares subject to outstanding Stock Options and
DERs granted under the Plan as may be determined by the Administrator, in its
sole discretion, provided that the number of shares subject to any award shall
always be a whole number. Such other substitutions or adjustments shall be made
as may be determined by the Administrator, in its sole discretion; provided,
however, that with respect to Incentive Stock Options, such adjustment shall be
made in accordance with Section 424 of the Code. An adjusted option price shall
also be used to determine the amount payable by the Company upon the exercise of
any Stock Appreciation Right or Limited Stock Appreciation Right associated with
any Stock Option.

        The aggregate number of shares of Stock for which Stock Options or Stock
Appreciation Rights may be granted to any individual during any calendar year
may not, subject to adjustment as provided in this Section 3, exceed 75% of the
shares of Stock reserved for the purposes of the Plan in accordance with the
provisions of this Section 3.

Section 4. Eligibility.

        Officers and other key employees of the Company or Subsidiaries who are
responsible for or contribute to the management, growth and/or profitability of
the business of the Company or its Subsidiaries and consultants and agents of
the Company or its Subsidiaries, shall be eligible to be granted Stock Options,
DERs, Stock Appreciation Rights, Limited Stock Appreciation Rights, Restricted
Stock awards, Deferred Stock awards or Performance Shares hereunder. The
Participants under the Plan shall be selected from time to time by the
Administrator, in its sole discretion, from among the Eligible Employees and
consultants and agents recommended by the senior management of the Company, and
the Administrator shall determine, in its sole discretion, the number of shares
covered by each

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award; provided, however, that Eligible Non-Employee Directors shall only be
eligible to receive Stock Options as provided in Section 5A.

Section 5. Stock Options.

        Stock Options may be granted alone or in addition to other awards
granted under the Plan, including DERs as described in Section 5(11). Any Stock
Option granted under the Plan shall be in such form as the Administrator may
from time to time approve, and the provisions of Stock Option awards need not be
the same with respect to each optionee. Recipients of Stock Options shall enter
into a stock option agreement with the Company, in such form as the
Administrator shall determine, which agreement shall set forth, among other
things, the exercise price of the option, the term of the option and provisions
regarding exercisability of the option granted thereunder.

        The Stock Options granted under the Plan may be of two types: (i)
Incentive Stock Options and (ii) Non-Qualified Stock Options.

        The Administrator shall have the authority under this Section 5 to grant
any optionee (except Eligible Non-Employee Directors) Incentive Stock Options,
Non-Qualified Stock Options, or both types of Stock Options (in each case with
or without DERs, Stock Appreciation Rights or Limited Stock Appreciation
Rights), provided, however, that Incentive Stock Options may not be granted to
any individual who is not an employee of the Company or its Subsidiaries. To the
extent that any Stock Option does not qualify as an Incentive Stock Option, it
shall constitute a separate Non-Qualified Stock Option. More than one option may
be granted to the same optionee and be outstanding concurrently hereunder.

        Stock Options granted under the Plan shall be subject to the following
terms and conditions and shall contain such additional terms and conditions, not
inconsistent with the terms of the Plan, as the Administrator shall deem
desirable:

        (1) Option Price. The option price per share of Stock purchasable under
a Stock Option shall be determined by the Administrator in its sole discretion
at the time of grant but shall not, in the case of Incentive Stock Options, be
less than 100% of the Fair Market Value of the Stock on such date, and shall
not, in any event, be less than the par value of the Stock. The option price per
share of Stock purchasable under a Non-Qualified Stock Option may be less than
100% of such Fair Market Value. If an employee owns or is deemed to own (by
reason of the attribution rules applicable under Section 425(d) of the Code)
more than 10% of the combined voting power of all classes of stock of the
Company or any Parent Corporation or Subsidiary and an Incentive Stock Option is
granted to such employee, the option price of such Incentive Stock Option (to
the extent required by the Code at the time of grant) shall be no less than 110%
of the Fair Market Value of the Stock on the date such Incentive Stock Option is
granted.

        (2) Option Term. The term of each Stock Option shall be fixed by the
Administrator, but no Stock Option shall be exercisable more than ten years
after the date such Stock Option is granted; provided, however, that if an
employee owns or is deemed to own (by reason of the attribution rules of Section
425(d) of the Code) more than 10% of the combined voting power of all classes of
stock of the Company or any Parent Corporation or Subsidiary and an Incentive
Stock Option is granted to such employee, the term of such Incentive Stock
Option (to the extent required by the Code at the time of grant) shall be no
more than five years from the date of grant.

        (3) Exercisability. Stock Options shall be exercisable at such time or
times and subject to such terms and conditions as shall be determined by the
Administrator at or after grant; provided, however, that, except as provided
herein or unless otherwise determined by the Administrator at or after grant,
Stock Options shall become exercisable as to 25% of the shares subject to such
Stock Option on the first anniversary of the date of grant of the Stock Option,
and as to an additional 25% on each of the next three anniversaries of the date
of grant. To the extent not exercised, installments shall accumulate and be
exercisable in whole or in part at any time after becoming exercisable but not
later than the date the Stock Option expires. The Administrator may provide, in
its discretion, that any Stock Option shall be exercisable only in installments,
and the Administrator may waive such installment exercise provisions at any time
in whole or in part based on such factors as the Administrator may determine, in
its sole discretion.

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        (4) Method of Exercise. Subject to Section 5(3), Stock Options may be
exercised in whole or in part at any time during the option period, by giving
written notice of exercise to the Company specifying the number of shares to be
purchased, accompanied by payment in full of the purchase price in cash or its
equivalent as determined by the Administrator. As determined by the
Administrator, in its sole discretion, payment in whole or in part may also be
made in the form of unrestricted Stock already owned by the optionee, or, in the
case of the exercise of a Non-Qualified Stock Option, Restricted Stock or
Performance Shares subject to an award hereunder (based, in each case, on the
Fair Market Value of the Stock on the date the option is exercised); provided,
however, that in the case of an Incentive Stock Option, the right to make
payment in the form of already owned shares may be authorized only at the time
of grant. Any payment in the form of stock already owned by the optionee may be
effected by use of an attestation form approved by the Administrator. If payment
of the option exercise price of a Non-Qualified Stock Option is made in whole or
in part in the form of Restricted Stock or Performance Shares, the shares
received upon the exercise of such Stock Option (to the extent of the number of
shares of Restricted Stock or Performance Shares surrendered upon exercise of
such Stock Option) shall be restricted in accordance with the original terms of
the Restricted Stock or Performance Share award in question, except that the
Administrator may direct that such restrictions shall apply only to that number
of shares equal to the number of shares surrendered upon the exercise of such
option. An optionee shall generally have the rights to dividends and other
rights of a stockholder with respect to shares subject to the option only after
the optionee has given written notice of exercise, has paid in full for such
shares, and, if requested, has given the representation described in paragraph
(1) of Section 11.

        The Administrator may require the voluntary surrender of all or a
portion of any Stock Option granted under the Plan as a condition precedent to a
grant of a new Stock Option. Subject to the provisions of the Plan, such new
Stock Option shall be exercisable at the price, during such period and on such
other terms and conditions as are specified by the Administrator at the time the
new Stock Option is granted; provided, however, that should the Administrator so
require, the number of shares subject to such new Stock Option shall not be
greater than the number of shares subject to the surrendered Stock Option. Upon
their surrender, Stock Options shall be canceled and the shares previously
subject to such canceled Stock Options shall again be available for grants of
Stock Options and other awards hereunder.

        (5) Loans. The Company may make loans available to Stock Option holders
in connection with the exercise of outstanding options granted under the Plan,
as the Administrator, in its discretion, may determine. Such loans shall (i) be
evidenced by promissory notes entered into by the Stock Option holders in favor
of the Company, (ii) be subject to the terms and conditions set forth in this
Section 5(5) and such other terms and conditions, not inconsistent with the
Plan, as the Administrator shall determine, and (iii) bear interest, if any, at
such rate as the Administrator shall determine. In no event may the principal
amount of any such loan exceed the sum of (x) the exercise price less the par
value of the shares of Stock covered by the option, or portion thereof,
exercised by the holder, and (y) any federal, state, and local income tax
attributable to such exercise. The initial term of the loan, the schedule of
payments of principal and interest under the loan, the extent to which the loan
is to be with or without recourse against the holder with respect to principal
or interest and the conditions upon which the loan will become payable in the
event of the holder's termination of employment shall be determined by the
Administrator; provided, however, that the term of the loan, including
extensions, shall not exceed seven years. Unless the Administrator determines
otherwise, when a loan is made, shares of Stock having a Fair Market Value at
least equal to the principal amount of the loan shall be pledged by the holder
to the Company as security for payment of the unpaid balance of the loan, and
such pledge shall be evidenced by a pledge agreement, the terms of which shall
be determined by the Administrator, in its discretion; provided, however, that
each loan shall comply with all applicable laws, regulations and rules of the
Board of Governors of the Federal Reserve System and any other governmental
agency having jurisdiction.

        (6) Limits on Transferability of Options.

             (a) Subject to Section 5(6)(b), no Stock Option shall be
transferable by the optionee otherwise than by will or by the laws of descent
and distribution or pursuant to a "qualified domestic relations order," as such
term is defined in the Employee Retirement Income Security Act of 1974, as
amended ("ERISA"), and all Stock Options shall be exercisable, during the
optionee's lifetime, only by the optionee or in accordance with the terms of a

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qualified domestic relations order.

             (b) The Administrator may, in its discretion, authorize all or a
portion of the options to be granted to an optionee to be on terms which permit
transfer by such optionee to (i) the spouse, qualified domestic partner,
children or grandchildren of the optionee and any other persons related to the
optionee as may be approved by the Administrator ("Immediate Family Members"),
(ii) a trust or trusts for the exclusive benefit of such Immediate Family
Members, (iii) a partnership or partnerships in which such Immediate Family
Members are the only partners, or (iv) any other persons or entities as may be
approved by the Administrator, provided that (x) there may be no consideration
for any transfer unless approved by the Administrator, (y) the stock option
agreement pursuant to which such options are granted must be approved by the
Administrator, and must expressly provide for transferability in a manner
consistent with this Section 5(6)(b), and (z) subsequent transfers of
transferred options shall be prohibited except those in accordance with Section
5(6)(a) or expressly approved by the Administrator. Following transfer, any such
options shall continue to be subject to the same terms and conditions as were
applicable immediately prior to transfer, provided that, except for purposes of
Sections 5(7), (8), (9), (10) and 11(3) hereof, the terms "optionee," "Stock
Option holder" and "Participant" shall be deemed to refer to the transferee. The
events of termination of employment under Sections 5(7), (8) and (9) hereof
shall continue to be applied with respect to the original optionee, following
which the options shall be exercisable by the transferee only to the extent, and
for the periods specified under such sections unless the option agreement
governing such options otherwise provides. Notwithstanding the transfer, the
original optionee will continue to be subject to the provisions of Section 11(3)
regarding payment of taxes, including the provisions entitling the Company to
deduct such taxes from amounts otherwise due to such optionee. Any transfer of a
Stock Option that was originally granted with DERs related thereto shall
automatically include the transfer of such DERs, any attempt to transfer such
Stock Option separately from such DERs shall be void, and such DERs shall
continue in effect according to their terms. "Qualified domestic partner" for
the purpose of this Section 5(6)(b) shall mean a domestic partner living in the
same household as the optionee and registered with, certified by or otherwise
acknowledged by the county or other applicable governmental body as a domestic
partner or otherwise establishing such status in any manner satisfactory to the
Administrator. Stock options granted prior to December 1, 1996 may be amended to
provide for their transferability, subject to the foregoing conditions.

        (7) Termination by Death. If an optionee's employment with the Company
or any Subsidiary terminates by reason of death, the Stock Option may thereafter
be immediately exercised, to the extent then exercisable (or on such accelerated
basis as the Administrator shall determine at or after grant), by the legal
representative of the estate or by the legatee of the optionee under the will of
the optionee, for a period of twelve months (or such shorter period as the
Administrator shall specify at grant) from the date of such death or until the
expiration of the stated term of such Stock Option, whichever period is shorter.

        (8) Termination by Reason of Disability. If an optionee's employment
with the Company or any Subsidiary terminates by reason of Disability, any Stock
Option held by such optionee may thereafter be exercised, to the extent it was
exercisable at the time of such termination (or on such accelerated basis as the
Administrator shall determine at the time of grant), for a period of twelve
months (or such shorter period as the Administrator shall specify at grant) from
the date of such termination of employment or until the expiration of the stated
term of such Stock Option, whichever period is shorter; provided, however, that,
if the optionee dies within such twelve-month period (or such shorter period as
the Administrator shall specify at grant) and prior to the expiration of the
stated term of such Stock Option, any unexercised Stock Option held by such
optionee shall thereafter be exercisable to the extent to which it was
exercisable at the time of termination for a period of twelve months (or such
shorter period as the Administrator shall specify at grant) from the time of
death or until the expiration of the stated term of such Stock Option, whichever
period is shorter. In the event of a termination of employment by reason of
Disability, if an Incentive Stock Option is exercised after the expiration of
the applicable exercise periods under Section 422 of the Code, such Stock Option
shall thereafter be treated as a Non-Qualified Stock Option.

        (9) Other Termination. Except as otherwise determined by the
Administrator, if an optionee's employment with the Company or any Subsidiary
terminates for any reason other than death or Disability, the Stock Option may
be exercised for a period of three months from the date of such termination, or
until the expiration of the stated term of such Stock Option, whichever period
is shorter.

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        (10) Annual Limit on Incentive Stock Options. To the extent that the
aggregate Fair Market Value (determined as of the date the Incentive Stock
Option is granted) of shares of Stock with respect to which Incentive Stock
Options granted to an Optionee under this Plan and all other option plans of the
Company, its Parent Corporation or any Subsidiary become exercisable for the
first time by the Optionee during any calendar year exceeds $100,000, such Stock
Options shall be treated as Non-Qualified Stock Options.

        (11) DERs. The Administrator shall have the discretion to grant DERs in
conjunction with grants of Stock Options pursuant to this Section 5. DERs may be
granted in either of two forms, "Current-pay DERs" and "Accrued DERs" and the
Administrator may condition the payment or accrual of amounts in respect thereof
subject to satisfaction of such performance objectives as the Administrator may
specify at the time of grant. Assuming satisfaction of any applicable
conditions, Current-pay DERs shall be paid concurrently with any dividends or
distributions paid on the Stock during the time the related Stock Options are
outstanding in an amount equal to the cash dividend (or Stock or other property
hereby distributed) per share being paid on the Stock times the number of shares
subject to the related Stock Options. Current-pay DERs are payable in cash,
Stock or such other property as may be distributed to stockholders. Accrued DERs
may be accrued in respect of cash dividends only or cash dividends and the value
of any Stock or other property distributed to stockholders, as the Administrator
shall determine at the time of grant. Assuming satisfaction of any applicable
conditions, Accrued DERs shall be accrued with respect to the related Stock
Options outstanding as of the date dividends are declared on the Company's Stock
in accordance with the following formula:

                                   (A x B) / C

under which "A" equals the number of shares subject to such Stock Options, "B"
equals the cash dividend per share or the value per share of the Stock or other
property being distributed, as the case may be, and "C" equals the Fair Market
Value per share of Stock on the dividend payment date. The Accrued DERs shall
represent shares of Stock which shall be issuable to the holder of the related
Stock Option proportionately as the holder exercises the Stock Option to which
the Accrued DERs relate, rounded down to the nearest whole number of shares.
DERs shall expire upon the expiration of the Stock Options to which they relate.
The Administrator shall specify at the time of grant whether dividends shall be
payable or credited on Accrued DERs. Notwithstanding anything to the contrary
herein, Accrued DERs granted with respect to Stock Options shall be accrued only
to the extent of the number of shares of stock then reserved and available for
issuance under the Plan in excess of the number of shares subject to issuance
pursuant to outstanding Stock Option, Accrued DER, Stock Appreciation Right,
Limited Stock Appreciation Right, Deferred Stock or Performance Share awards.

Section 5A. Stock Options For Eligible Non-Employee Directors.

        This Section 5A shall apply only to automatic grants of Stock Options to
Eligible Non-Employee Directors.

        (1) Each Eligible Non-Employee Director shall automatically be granted,
upon becoming a director of the Company or any Subsidiary, a Non-Qualified Stock
Option to purchase 5,000 shares of Stock. In addition, on the day after the
annual meeting of stockholders of the Company to be held in the calendar year
1998, and on the day after each annual stockholders' meeting of the Company
thereafter during the term of the Plan, each Eligible Non-Employee Director of
the Company shall be granted a Non-Qualified Stock Option to purchase such
number of shares of Stock that the aggregate of the option prices thereof equals
$20,000.00, rounded up to the nearest 100 shares, together with Current-pay DERs
with respect to such Non-Qualified Stock Option. The option price per share of
Stock purchasable under such Stock Option shall be 100% of the Fair Market Value
on the date of grant. Such Stock Option shall become exercisable as to 25% of
the shares subject to such Stock Option on the first anniversary of the date of
grant of the Stock Option or such other date as the Board may approve, and as to
an additional 25% of the shares subject to such Stock Option on each of the next
three anniversaries of the first vesting date. To the extent not exercised,
installments shall accumulate and be exercisable in whole or in part at any time
after becoming exercisable but not later than the date the Stock Option expires.
Exercise shall be by payment in full of the purchase price in cash and no stock
option shall be exercisable more than ten years after the date of grant. The
aggregate number of shares of Stock that may be granted to Eligible Non-Employee
Directors pursuant to the Plan may not exceed 180,000 shares.

                                       8
<PAGE>   9

        (2) Eligible Non-Employee Directors who receive grants of Stock Options
shall enter into a stock option agreement with the Company, which agreement
shall set forth, among other things, the exercise price of the option, the term
of the option and provisions regarding exercisability of the option granted
thereunder. The Stock Options granted under this section shall be Non-Qualified
Stock Options.

        (3) Non-Qualified Stock Options granted to Eligible Non-Employee
Directors hereunder shall be transferable only to the extent provided in
Sections 5(6)(a) and (b).

        (4) Current-pay DERs shall be credited with respect to such
Non-Qualified Stock Options in accordance with the provisions of Section 5(11)
above.

        (5) The Board may not amend, alter or discontinue the provisions of this
Section 5A more than once every six months other than to comport with changes in
the Code, ERISA or the rules thereunder.

Section 6. Stock Appreciation Rights and Limited Stock Appreciation Rights.

        (1) Grant and Exercise. Stock Appreciation Rights and Limited Stock
Appreciation Rights may be granted either alone ("Free Standing Rights") or in
conjunction with all or part of any Stock Option granted under the Plan
("Related Rights"). In the case of a Non-Qualified Stock Option, Related Rights
may be granted either at or after the time of the grant of such Stock Option. In
the case of an Incentive Stock Option, Related Rights may be granted only at the
time of the grant of the Incentive Stock Option.

        A Related Right or applicable portion thereof granted in conjunction
with a given Stock Option shall terminate and no longer be exercisable upon the
termination or exercise of the related Stock Option, except that, unless
otherwise provided by the Administrator at the time of grant, a Related Right
granted with respect to less than the full number of shares covered by a related
Stock Option shall only be reduced if and to the extent that the number of
shares covered by the exercise or termination of the related Stock Option
exceeds the number of shares not covered by the Stock Appreciation Right.

        A Related Right may be exercised by an optionee, in accordance with
paragraph (2) of this Section 6, by surrendering the applicable portion of the
related Stock Option. Upon such exercise and surrender, the optionee shall be
entitled to receive an amount determined in the manner prescribed in paragraph
(2) of this Section 6. Stock Options which have been so surrendered, in whole or
in part, shall no longer be exercisable to the extent the Related Rights have
been so exercised.

        (2) Terms and Conditions. Stock Appreciation Rights shall be subject to
such terms and conditions, not inconsistent with the provisions of the Plan, as
shall be determined from time to time by the Administrator, including the
following:

             (a) Stock Appreciation Rights that are Related Rights ("Related
Stock Appreciation Rights") shall be exercisable only at such time or times and
to the extent that the Stock Options to which they relate shall be exercisable
in accordance with the provisions of Section 5 and this Section 6; provided,
however, that no Related Stock Appreciation Right shall be exercisable during
the first six months of its term, except that this additional limitation shall
not apply in the event of death or Disability of the optionee prior to the
expiration of such six-month period.

             (b) Upon the exercise of a Related Stock Appreciation Right, an
optionee shall be entitled to receive up to, but not more than, an amount in
cash or that number of shares of Stock (or in some combination of cash and
shares of Stock) equal in value to the excess of the Fair Market Value of one
share of Stock as of the date of exercise over the option price per share
specified in the related Stock Option multiplied by the number of shares of
Stock in respect of which the Related Stock Appreciation Right is being
exercised, with the Administrator having the right to determine the form of
payment.

                                       9
<PAGE>   10

             (c) Related Stock Appreciation Rights shall be transferable or
exercisable only when and to the extent that the underlying Stock Option would
be transferable or exercisable under paragraph (6) of Section 5.

             (d) Upon the exercise of a Related Stock Appreciation Right, the
Stock Option or part thereof to which such Related Stock Appreciation Right is
related shall be deemed to have been exercised for the purpose of the limitation
set forth in Section 3 on the number of shares of Stock to be issued under the
Plan.

             (e) A Related Stock Appreciation Right granted in connection with
an Incentive Stock Option may be exercised only if and when the Fair Market
Value of the Stock subject to the Incentive Stock Option exceeds the exercise
price of such Stock Option.

             (f) Stock Appreciation Rights that are Free Standing Rights ("Free
Standing Stock Appreciation Rights") shall be exercisable at such time or times
and subject to such terms and conditions as shall be determined by the
Administrator at or after grant; provided, however, that no Free Standing Stock
Appreciation Right shall be exercisable during the first six months of its term,
except that this limitation shall not apply in the event of death or Disability
of the recipient of the Free Standing Stock Appreciation Right prior to the
expiration of such six-month period.

             (g) The term of each Free Standing Stock Appreciation Right shall
be fixed by the Administrator, but no Free Standing Stock Appreciation Right
shall be exercisable more than ten years after the date such right is granted.

             (h) Upon the exercise of a Free Standing Stock Appreciation Right,
a recipient shall be entitled to receive up to, but not more than, an amount in
cash or that number of shares of Stock (or any combination of cash or shares of
Stock) equal in value to the excess of the Fair Market Value of one share of
Stock as of the date of exercise over the price per share specified in the Free
Standing Stock Appreciation Right (which price shall be no less than 100% of the
Fair Market Value of the Stock on the date of grant) multiplied by the number of
shares of Stock with respect to which the right is being exercised, with the
Administrator having the right to determine the form of payment.

             (i) Free Standing Stock Appreciation Rights shall be transferable
or exercisable subject to the provisions governing the transferability and
exercisability of Stock Options set forth in paragraphs (3) and (6) of Section
5.

             (j) In the event of the termination of an employee who has been
granted one or more Free Standing Stock Appreciation Rights, such rights shall
be exercisable to the same extent that a Stock Option would have been
exercisable in the event of the termination of the optionee.

             (k) Limited Stock Appreciation Rights may only be exercised within
the 30-day period following a "Change of Control" (as defined in Section 10
below), and, with respect to Limited Stock Appreciation Rights that are Related
Rights ("Related Limited Stock Appreciation Rights"), only to the extent that
the Stock Options to which they relate shall be exercisable in accordance with
the provisions of Section 5 and this Section 6; provided, however, that no
Related Limited Stock Appreciation Right shall be exercisable during the first
six months of its term, except that this additional limitation shall not apply
in the event of death or Disability of the optionee prior to the expiration of
such six-month period.

             (l) Upon the exercise of a Limited Stock Appreciation Right, the
recipient shall be entitled to receive an amount in cash equal in value to the
excess of the "Change of Control Price" (as defined in Section 10) of one share
of Stock as of the date of exercise over (A) the option price per share
specified in the related Stock Option, or (B) in the case of a Limited Stock
Appreciation Right which is a Free Standing Stock Appreciation Right, the price
per share specified in the Free Standing Stock Appreciation Right, such excess
to be multiplied by the number of shares in respect of which the Limited Stock
Appreciation Right shall have been exercised.

             (m) For the purpose of the limitation set forth in Section 3 on the
number of shares to be

                                       10
<PAGE>   11

issued under the Plan, the grant or exercise of Free Standing Stock Appreciation
Rights shall be deemed to constitute the grant or exercise, respectively, of
Stock Options with respect to the number of shares of Stock with respect to
which such Free Standing Stock Appreciation Rights were so granted or exercised.

Section 7. Restricted Stock, Deferred Stock and Performance Shares.

        (1) General. Restricted Stock, Deferred Stock or Performance Share
awards may be issued either alone or in addition to other awards granted under
the Plan. The Administrator shall determine the Eligible Employees to whom, and
the time or times at which, grants of Restricted Stock, Deferred Stock or
Performance Share awards shall be made; the number of shares to be awarded; the
price, if any, to be paid by the recipient of Restricted Stock, Deferred Stock
or Performance Share awards; the Restricted Period (as defined in Section 7(3))
applicable to Restricted Stock or Deferred Stock awards; the performance
objectives applicable to Performance Share or Deferred Stock awards; the date or
dates on which restrictions applicable to such Restricted Stock or Deferred
Stock awards shall lapse during such Restricted Period; and all other conditions
of the Restricted Stock, Deferred Stock and Performance Share awards. The
Administrator may also condition the grant of Restricted Stock, Deferred Stock
awards or Performance Shares upon the exercise of Stock Options, or upon such
other criteria as the Administrator may determine, in its sole discretion. The
provisions of Restricted Stock, Deferred Stock or Performance Share awards need
not be the same with respect to each recipient.

        (2) Awards and Certificates. The prospective recipient of a Restricted
Stock, Deferred Stock or Performance Share award shall not have any rights with
respect to such award, unless and until such recipient has executed an agreement
evidencing the award (a "Restricted Stock Award Agreement," "Deferred Stock
Award Agreement," or "Performance Share Award Agreement," as appropriate) and
delivered a fully executed copy thereof to the Company, within a period of sixty
days (or such other period as the Administrator may specify) after the award
date. Except as otherwise provided below in this Section 7(2), (i) each
Participant who is awarded Restricted Stock or Performance Shares shall be
issued a stock certificate in respect of such shares of Restricted Stock or
Performance Shares; and (ii) such certificate shall be registered in the name of
the Participant, and shall bear an appropriate legend referring to the terms,
conditions, and restrictions applicable to such award, substantially in the
following form:

"The transferability of this certificate and the shares of stock represented
hereby are subject to the terms and conditions (including forfeiture) of the
Redwood Trust, Inc. Amended and Restated 1994 Executive and Non-Employee
Director Stock Option Plan and a Restricted Stock Award Agreement or Performance
Share Award Agreement entered into between the registered owner and Redwood
Trust, Inc. Copies of such Plan and Agreement are on file in the offices of
Redwood Trust, Inc."

        The Company shall require that the stock certificates evidencing such
shares be held in the custody of the Company until the restrictions thereon
shall have lapsed, and that, as a condition of any Restricted Stock award or
Performance Share award, the Participant shall have delivered a stock power,
endorsed in blank, relating to the Stock covered by such award.

        (3) Restrictions and Conditions. The Restricted Stock, Deferred Stock
and Performance Share awards granted pursuant to this Section 7 shall be subject
to the following restrictions and conditions:

             (a) Subject to the provisions of the Plan and the Restricted Stock,
Deferred Stock or Performance Share award agreement, during such period as may
be set by the Administrator commencing on the grant date (the "Restricted
Period"), the Participant shall not be permitted to sell, transfer, pledge or
assign shares of Restricted Stock, Performance Shares or Deferred Stock awarded
under the Plan; provided, however, that the Administrator may, in its sole
discretion, provide for the lapse of such restrictions in installments and may
accelerate or waive such restrictions in whole or in part based on such factors
and such circumstances as the Administrator may determine, in its sole
discretion, including, but not limited to, the attainment of certain performance
related goals, the Participant's termination, death or Disability or the
occurrence of a "Change of Control" as defined in Section 10.

             (b) Except as provided in paragraph (3)(a) of this Section 7, the
Participant shall have, with

                                       11
<PAGE>   12

respect to the shares of Restricted Stock or Performance Shares, all of the
rights of a stockholder of the Company, including the right to vote the shares,
and the right to receive any dividends thereon during the Restricted Period.
With respect to Deferred Stock awards, the Participant shall generally not have
the rights of a stockholder of the Company, including the right to vote the
shares during the Restricted Period; provided, however, that dividends declared
during the Restricted Period with respect to the number of shares covered by a
Deferred Stock award shall be paid to the Participant. Certificates for shares
of unrestricted Stock shall be delivered to the Participant promptly after, and
only after, the Restricted Period shall expire without forfeiture in respect of
such shares covered by the award of Restricted Stock, Performance Shares or
Deferred Stock, except as the Administrator, in its sole discretion, shall
otherwise determine.

             (c) Subject to the provisions of the Restricted Stock, Deferred
Stock or Performance Share award agreement and this Section 7, upon termination
of employment for any reason during the Restricted Period, all shares subject to
any restriction as of the date of such termination shall be forfeited by the
Participant, and the Participant shall only receive the amount, if any, paid by
the Participant for such Restricted Stock or Performance Shares, plus simple
interest on such amount at the rate of 8% per year.

Section 8. Amendment and Termination.

        Subject to the provisions of Section 5A(5), the Board may amend, alter
or discontinue the Plan, but no amendment, alteration, or discontinuation shall
be made that would impair the rights of a Participant under any award
theretofore granted without such Participant's consent, or that without the
approval of the stockholders (as described below) would:

        (1) except as provided in Section 3, increase the total number of shares
of Stock reserved for the purpose of the Plan;

        (2) change the employees or class of employees eligible to participate
in the Plan; or

        (3) extend the maximum option period under paragraph (2) of Section 5 of
the Plan.

        Notwithstanding the foregoing, stockholder approval under this Section 8
shall only be required at such time and under such circumstances as stockholder
approval would be required under Rule 16b-3 of the Act with respect to any
material amendment to any employee benefit plan of the Company.

        The Administrator may amend the terms of any award theretofore granted,
prospectively or retroactively, but, subject to Section 3, no such amendment
shall impair the rights of any holder without his or her consent.

Section 9. Unfunded Status of Plan.

        The Plan is intended to constitute an "unfunded" plan for incentive
compensation. With respect to any payments not yet made to a Participant or
optionee by the Company, nothing contained herein shall give any such
Participant or optionee any rights that are greater than those of a general
creditor of the Company.

Section 10. Change of Control.

        The following acceleration and valuation provisions shall apply in the
event of a "Change of Control" as defined in paragraph (2) of this Section 10:

        (1) In the event of a "Change of Control," unless otherwise determined
by the Administrator or the Board in writing at or after grant (including under
any individual agreement), but prior to the occurrence of such Change of
Control:

             (a) any Stock Appreciation Rights outstanding for at least six
months and any Stock Options, including Stock Options granted under Section 5A,
awarded under the Plan not previously exercisable and vested

                                       12
<PAGE>   13

shall become fully exercisable and vested;

             (b) the restrictions applicable to any Restricted Stock, Deferred
Stock or Performance Share awards under the Plan shall lapse, and such shares
and awards shall be deemed fully vested;

             (c) any indebtedness incurred pursuant to Section 5(5) shall be
forgiven and the collateral pledged in connection with any such loan shall be
released; and

             (d) the value of all outstanding Stock Options (except Stock
Options granted under Section 5A), DERs (except DERs granted in conjunction with
Stock Options granted under Section 5A), Stock Appreciation Rights, Limited
Stock Appreciation Rights, and Restricted Stock, Deferred Stock and Performance
Share awards shall, to the extent determined by the Administrator at or after
grant, be cashed out by a payment in cash or other property, as the
Administrator may determine, on the basis of the "Change of Control Price" (as
defined in paragraph (3) of this Section 10) as of the date the Change of
Control occurs or such other date as the Administrator may determine prior to
the Change of Control.

        (2) For purposes of paragraph (1) of this Section 10, a "Change of
Control" shall be deemed to have occurred if:

             (a) any "person," as such term is used in Sections 13(d) and 14(d)
of the Act (other than the Company; any trustee or other fiduciary holding
securities under an employee benefit plan of the Company; or any company owned,
directly or indirectly, by the stockholders of the Company in substantially the
same proportions as their ownership of Stock of the Company) is or becomes after
the Effective Date the "beneficial owner" (as defined in Rule 13d-3 under the
Act), directly or indirectly, of securities of the Company (not including in the
securities beneficially owned by such person any securities acquired directly
from the Company or its affiliates) representing 25% or more of the combined
voting power of the Company's then outstanding securities; or

             (b) during any period of two consecutive years (not including any
period prior to the Effective Date), individuals who at the beginning of such
period constitute the Board, and any new director (other than a director
designated by a person who has entered into an agreement with the Company to
effect a transaction described in clause (a), (c) or (d) of this Section 10(2))
whose election by the Board or nomination for election by the Company's
stockholders was approved by a vote of at least two-thirds (2/3) of the
directors then still in office who either were directors at the beginning of the
period or whose election or nomination for election was previously so approved,
cease for any reason to constitute at least a majority thereof; or

             (c) the stockholders of the Company approve a merger or
consolidation of the Company with any other corporation, other than (A) a merger
or consolidation which would result in the voting securities of the Company
outstanding immediately prior thereto continuing to represent (either by
remaining outstanding or by being converted into voting securities of the
surviving entity), in combination with the ownership of any trustee or other
fiduciary holding securities under an employee benefit plan of the Company, at
least 75% of the combined voting power of the voting securities of the Company
or such surviving entity outstanding immediately after such merger or
consolidation or (B) a merger or consolidation effected to implement a
recapitalization of the Company (or similar transaction) in which no person
acquires more than 50% of the combined voting power of the Company's then
outstanding securities; or

             (d) the stockholders of the Company approve a plan of complete
liquidation of the Company or an agreement for the sale or disposition by the
Company of all or substantially all of the Company's assets.

        (3) For purposes of this Section 10, "Change of Control Price" means the
higher of (i) the highest price per share paid or offered in any transaction
related to a Change of Control of the Company or (ii) the highest price per
share paid in any transaction reported on the exchange or national market system
on which the Stock is listed, at any time during the preceding sixty day period
as determined by the Administrator, except that, in the case of Incentive Stock
Options and Stock Appreciation Rights or Limited Stock Appreciation Rights
relating to Incentive Stock Options, such price shall be based only on
transactions reported for the date on which the Administrator

                                       13
<PAGE>   14

decides to cash out such options.

Section 11. General Provisions.

        (1) The Administrator may require each person purchasing shares pursuant
to a Stock Option to represent to and agree with the Company in writing that
such person is acquiring the shares without a view to distribution thereof. The
certificates for such shares may include any legend which the Administrator
deems appropriate to reflect any restrictions on transfer.

        All certificates for shares of Stock delivered under the Plan shall be
subject to such stock-transfer orders and other restrictions as the
Administrator may deem advisable under the rules, regulations, and other
requirements of the Commission, any stock exchange upon which the Stock is then
listed, and any applicable federal or state securities law, and the
Administrator may cause a legend or legends to be placed on any such
certificates to make appropriate reference to such restrictions.

        (2) Nothing contained in the Plan shall prevent the Board from adopting
other or additional compensation arrangements, subject to stockholder approval
if such approval is required; and such arrangements may be either generally
applicable or applicable only in specific cases. The adoption of the Plan shall
not confer upon any employee of the Company or any Subsidiary any right to
continued employment with the Company or a Subsidiary, as the case may be, nor
shall it interfere in any way with the right of the Company or a Subsidiary to
terminate the employment of any of its employees at any time.

        (3) Each Participant shall, no later than the date as of which the value
of an award first becomes includable in the gross income of the Participant for
federal income tax purposes, pay to the Company, or make arrangements
satisfactory to the Administrator regarding payment of, any federal, state, or
local taxes of any kind required by law to be withheld with respect to the
award. The obligations of the Company under the Plan shall be conditional on the
making of such payments or arrangements, and the Company (and, where applicable,
its Subsidiaries) shall, to the extent permitted by law, have the right to
deduct any such taxes from any payment of any kind otherwise due to the
Participant.

        (4) No member of the Board or the Administrator, nor any officer or
employee of the Company acting on behalf of the Board or the Administrator,
shall be personally liable for any action, determination, or interpretation
taken or made in good faith with respect to the Plan, and all members of the
Board or the Administrator and each and any officer or employee of the Company
acting on their behalf shall, to the extent permitted by law, be fully
indemnified and protected by the Company in respect of any such action,
determination or interpretation.

Section 12. Effective Date of Plan.

        The Plan became effective (the "Effective Date") on June 23, 1994, the
date the Company's stockholders formally approved the Plan.

Section 13. Term of Plan.

        No Stock Option, Stock Appreciation Right, Limited Stock Appreciation
Right, Restricted Stock, Deferred Stock or Performance Share award shall be
granted pursuant to the Plan on or after the tenth anniversary of the Effective
Date, but awards theretofore granted may extend beyond that date.

                                       14<PAGE>   1

                                                                    EXHIBIT 10.1

                                                                  March 28, 2000

Acqua Wellington North American Equities Fund Limited
c/o MeesPierson Fund Services (Bahamas) Ltd.
Montague Sterling Centre
East Bay Street, P.O. Box SS-6238
Nassau, Bahamas

Dear Sirs:

        This letter sets forth the agreement of Acqua Wellington North American
Equities Fund Limited (the "Purchaser") and Tegal Corporation (the "Company")
regarding the purchase by the Purchaser from the Company of the Company's common
stock (the "Common Stock") on the date hereof. The parties agree as follows:

1.             This Agreement relates to the purchase by the Purchaser of
        442,822 shares of the Company's Common Stock (the "Shares") for an
        aggregate purchase price of $2,970,000, which purchase is being settled
        by the parties on the date hereof.

2.             The Company is a corporation duly incorporated, validly existing
        and in good standing under the laws of Delaware. The Company has the
        requisite corporate power and authority to enter into and perform this
        Agreement and to issue and sell the Shares in accordance with the terms
        hereof. The execution, delivery and performance of this Agreement by the
        Company and the consummation by it of the transactions contemplated
        hereby have been duly and validly authorized by all necessary corporate
        action. A copy of the duly executed resolutions of the Board of
        Directors of the Company is attached hereto as Exhibit "B". This
        Agreement has been duly executed and delivered on behalf of the Company
        by a duly authorized officer. A copy of a duly executed incumbency
        certificate of the Company's duly authorized officers is attached hereto
        as Exhibit "C". This Agreement (assuming its due execution and delivery
        by the other party hereto) constitutes, or shall constitute when
        executed and delivered, a valid and binding obligation of the Company
        enforceable against the Company in accordance with its terms, subject to
        the effects of bankruptcy, insolvency, fraudulent conveyance,
        reorganization, moratorium and other similar laws relating to or
        affecting creditors' rights generally and general equitable principles
        (whether considered in a proceeding in equity or at law).

3.             The Shares to be issued under this Agreement have been duly
        authorized by all necessary corporate action and, when paid for or
        issued in accordance with the terms hereof, the Shares shall be validly
        issued, fully paid and nonassessable.

4.             The Company represents and warrants that (a) the Company has
        filed with the Securities and Exchange Commission (the "Commission")
        pursuant to Rule 415 under

                                      -1-
<PAGE>   2

        the Securities Act of 1933, as amended (the "Securities Act"), a
        registration statement on Form S-3, Commission File Number 333-94093
        (such registration statement, as amended when it became effective on
        January 10, 2000 under the Securities Act, shall be referred to
        hereinafter as the "Registration Statement"); (b) the Company has filed
        a prospectus supplement to the Registration Statement in connection with
        this transaction; and (c) the Shares are registered under the
        Registration Statement. Copies of the Registration Statement and the
        Prospectus Supplement, each as filed (and declared effective, if
        applicable) by the Securities and Exchange Commission, are annexed
        hereto as Exhibits "D" and "E", respectively.

5.             [Deleted Intentionally.]

6.             The Company will continue to take all reasonable action
        necessary to continue the listing or trading of its Common Stock on the
        NASDAQ National Market or any relevant market or system, if applicable,
        and will comply in all material respects with the Company's reporting,
        listing (including, without limitation, the listing of the Shares
        purchased by the Purchaser) or other obligations under the rules of the
        NASDAQ National Market or any relevant market or system.

7.             The Company has filed with the Commission all reports, forms,
        registration statements, definitive proxy statements and documents
        required to be filed with the SEC since March 31, 1997 (the "Commission
        Filings"). The Company has delivered or made available to the Purchaser
        true and complete copies of the Commission Filings. As of their
        respective dates, each of the Commission Filings complied in all
        material respects with the requirements of the Securities Exchange Act
        of 1934 (the "Exchange Act") and the rules and regulations of the
        Commission promulgated thereunder, and, as of their respective dates,
        none of the Commission Filings referred to above contained any untrue
        statement of a material fact or omitted to state a material fact
        required to be stated therein or necessary in order to make the
        statements therein, in light of the circumstances under which they were
        made, not misleading. Each of the consolidated balance sheets of the
        Company included in or incorporated by reference into the Commission
        Filings (including the related notes and schedules) presents fairly the
        consolidated financial position of the Company and its consolidated
        subsidiaries as of its date, and each of the consolidated statements of
        income, retained earnings and cash flows of the Company included in or
        incorporated by reference into the Commission Filings (including any
        related notes and schedules) presents fairly the results of operations,
        retained earnings or cash flows, as the case may be, of the Company and
        its subsidiaries for the periods set forth therein (subject, in the case
        of unaudited statements, to normal year-end audit adjustments), in each
        case in accordance with GAAP consistently applied during the periods
        involved, except as may be noted therein.

8.             The Company will promptly notify the Purchaser of (a) any stop
        order or other suspension of the effectiveness of the Registration
        Statement and (b) the happening of any event as a result of which the
        prospectus included in the Registration Statement

                                      -2-
<PAGE>   3

        includes an untrue statement of a material fact or omits to state a
        material fact required to be stated therein, or necessary to make the
        statements therein, in light of the circumstances under which they were
        made, not misleading.

9.             Except as otherwise required by applicable law or requirements
        of any stock exchange or NASDAQ, as applicable, the Company may not
        issue a press release or otherwise make a public statement or
        announcement with respect to the completion of the transaction
        contemplated hereby without the prior consent of the Purchaser, which
        shall not be unreasonably withheld.

10.             The Company and the Purchaser will indemnify the other party as
        provided in Exhibit "A" attached hereto. For purposes of said Exhibit A,
        capitalized terms used therein without definition shall have the same
        meanings therein as are ascribed to said terms in this Agreement.

11.             This Agreement shall be governed and construed in accordance
        with the substantive laws of the State of New York without giving effect
        to the conflicts of law principles thereunder. This Agreement
        constitutes the entire agreement between the parties with respect to the
        subject matter hereof and supersedes all prior agreements and
        undertakings, both written and oral, among the parties, or any of them,
        with respect to the subject matter hereof. This Agreement may be
        executed in two or more counterparts, and by the different parties
        hereto in separate counterparts, each of which when executed shall be
        deemed to be an original but all of which taken together shall
        constitute one and the same agreement.

12.             The Purchaser has the requisite power and authority to enter
        into and perform this Agreement and to purchase the Shares. The
        execution, delivery and performance of this Agreement by Purchaser and
        the consummation by it of the transactions contemplated hereby have been
        duly authorized by all necessary action. This Agreement constitutes, or
        shall constitute when executed and delivered, a valid and binding
        obligation of the Purchaser enforceable against the Purchaser in
        accordance with its terms, subject to the effects of bankruptcy,
        insolvency, fraudulent conveyance, reorganization, moratorium and other
        similar laws relating to or affecting creditors' rights generally and
        general equitable principles (whether considered in a proceeding in
        equity or at law).

13.             If any provision of this Agreement shall be invalid or
        unenforceable in any jurisdiction, such invalidity or unenforceability
        shall not affect the validity or enforceability of the remainder of this
        Agreement in that jurisdiction or the validity or enforceability of any
        provision of this Agreement in any other jurisdiction.

14.             No provision of this Agreement may be amended other than by an
        instrument in writing signed by the Company and the Purchaser and no
        provision hereof may be waived other than by an instrument in writing
        signed by the party against whom enforcement is sought.

                                      -3-
<PAGE>   4

        Delivery of an executed copy of a signature page to this Agreement by
facsimile transmission shall be effective as delivery of a manually executed
copy of this Agreement and shall be effective and enforceable as the original.

        Please execute a copy of this letter which, when executed by the
Purchaser, will constitute an Agreement between the Company and the Purchaser.

                                       Very truly yours,

                                       TEGAL CORPORATION

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

AGREED TO:

PURCHASER:

ACQUA WELLINGTON NORTH AMERICAN
     EQUITIES FUND LIMITED

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

                                      -4-
<PAGE>   5

                                   EXHIBIT 'A'

                            TERMS OF INDEMNIFICATION

(a)     INDEMNIFICATION BY THE COMPANY. The Company will indemnify and hold
        harmless the Purchaser and each person, if any, who controls the
        Purchaser within the meaning of Section 15 of the Securities Act of
        1933, as amended (the "Securities Act"); or Section 20(a) of the
        Securities Exchange Act, as amended (the "Exchange Act"); from and
        against any losses, claims, damages, liabilities, costs and expenses
        (including, without limitation, reasonable costs of defense and
        investigation and all attorneys' fees and expenses) to which the
        Purchaser and each person, if any, who controls the Purchaser may become
        subject, under the Securities Act or otherwise, insofar as such losses,
        claims, damages, liabilities and expenses (or actions in respect
        thereof) arise out of or are based upon (i) any untrue statement or
        alleged untrue statement of a material fact contained, or incorporated
        by reference, in the Registration Statement relating to Shares being
        sold to the Purchaser (including the prospectus dated January 10, 2000,
        the prospectus supplement dated March 28, 2000 (the "Prospectus
        Supplement") which are a part of the Registration Statement), or any
        amendment or supplement to the Registration Statement, or (ii) the
        omission or alleged omission to state in that Registration Statement or
        any document incorporated by reference in the Registration Statement, a
        material fact required to be stated therein or necessary to make the
        statements therein not misleading, except insofar as such losses,
        claims, damages, liabilities, costs and expenses are caused by any such
        untrue statement or omission or alleged untrue statement or omission of
        material fact so made in reliance upon and in conformity with
        information furnished in writing to the Company by the Purchaser or on
        the Purchaser's behalf expressly for inclusion therein (an
        "Indemnifiable Matter").

        The indemnifying party will reimburse the indemnified party and each
        such controlling person promptly upon demand for any legal or other
        costs or expenses reasonably incurred by the indemnified party or the
        controlling person in investigating, defending against, or preparing to
        defend against any claim relating to the applicable Indemnifiable
        Matter.

(b)     INDEMNIFICATION BY PURCHASER Purchaser agrees to indemnify and hold
        harmless the Company, its officers, directors and agents and each
        person, if any, who controls the Company within the meaning of either
        Section 15 of the Securities Act or Section 20 of the Exchange Act to
        the same extent as the foregoing indemnity from the Company to the
        Purchaser, but only with respect to information relating to the
        Purchaser furnished in writing by the Purchaser or with the Purchaser's
        authorization on the Purchaser's behalf expressly for use in any
        registration statement or prospectus relating to the Shares, or any
        amendment or supplement thereto.

                                      -5-
<PAGE>   6

(c)     INDEMNIFICATION PROCEDURES. Promptly after a person receives notice of a
        claim or the commencement of an action, suit or proceeding for which the
        person intends to seek indemnification under Paragraph (a), the person
        will notify the indemnifying party in writing of the claim or
        commencement of the action, suit or proceeding, but failure to notify
        the indemnifying party will not relieve the indemnifying party from
        liability under Paragraph (a), except to the extent the indemnifying
        party has been materially prejudiced by the failure to give notice. The
        indemnifying party will be entitled to participate in the defense of any
        claim, action, suit or proceeding as to which indemnification is being
        sought, or the indemnifying party may (but will not be required to)
        assume the defense against the claim, action, suit or proceeding with
        legal counsel chosen by the indemnifying party. After an indemnifying
        party notifies an indemnified party that the indemnifying party wishes
        to assume the defense of a claim, action, suit or proceeding the
        indemnifying party will not be liable for any legal or other expenses
        incurred by the indemnified party in connection with the defense against
        the claim, action, suit or proceeding, except that if, in the opinion of
        legal counsel to the indemnifying party, one or more of the indemnified
        parties should be separately represented in connection with a claim,
        action, suit or proceeding the indemnifying party will pay the
        reasonable fees and expenses of one separate counsel for the indemnified
        parties. Each indemnified party, as a condition precedent to receiving
        indemnification as provided in Paragraph (a), will, at the cost and
        expense of the indemnifying party, cooperate in all reasonable respects
        with the indemnifying party in the defense of the claim, action, suit or
        proceeding as to which indemnification is sought. No indemnifying party
        will be liable for any settlement of any claim, action, suit or
        proceeding effected without its prior written consent. No indemnifying
        party will, without the prior written consent of the indemnified party,
        effect any settlement of a pending or threatened claim, action or
        proceeding with respect which an indemnified party is, or is informed
        that it may be, made a party and for which it would be entitled to
        indemnification, unless the settlement includes an unconditional release
        of the indemnified party from all liability and claims which are the
        subject matter of the pending or threatened action other than financial
        obligations for which the indemnified party will be indemnified
        hereunder.

(d)     CONTRIBUTION. If for any reason the indemnification provided for in this
        Agreement is not available to, or is not sufficient to hold harmless, an
        indemnified party in respect of any loss, claim, damage, liability, cost
        or expense referred to in Paragraph (a), each indemnifying party will,
        in lieu of indemnifying the indemnified party, contribute to the amount
        paid or payable by the indemnified party, as a result of the loss,
        claim, damage, liability, cost or expense (i) in the proportion which is
        appropriate to reflect the relative benefits received by the
        indemnifying party, on the one hand, and by the indemnified party, on
        the other hand, from the sale of stock which is the subject of the
        claim, action, suit or proceeding which resulted in the loss, claim,
        liability, cost or expense or (ii) if that allocation is not permitted
        by applicable law, in such proportion as is appropriate to reflect not
        only the relative benefits of the sale of stock, but also the relative
        fault of the indemnifying party and the indemnified party with respect
        to the statements or omissions which are the subject of the claim,
        action, suit or proceeding that resulted in the loss,

                                      -6-
<PAGE>   7

        claim, damage, liability, cost or expense as well as any other relevant
        equitable considerations.

                                      -7-

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