Document:

EXHIBIT 10.25

                           COLLATERAL AGENT AGREEMENT
                           --------------------------

     This Collateral Agent Agreement (the "Collateral Agreement") is made and
entered into and effective as of the 30th day of September, 2001 (the "Effective
Date") by and among FGFC Holdings, Inc., a California corporation ("FGFC
Holdings"), EMB Corporation, a Hawaii corporation ("EMB"), and that individual
set forth below as the Collateral Agent. FGFC Holdings and EMB are sometimes
collectively referred to herein as "Parties" and individually as "Party".
Capitalized terms not otherwise defined in this Agreement shall have the
meanings ascribed to them in the Note (as hereinafter defined).

                                    RECITALS

     A.   As provided for in the Purchase Agreement by and between EMB and FGFC
          Holdings dated September 30, 2001 (the "Purchase Agreement") whereby
          EMB acquired from FGFC Holdings all of the common stock of First
          Guaranty Financial Corporation, a California corporation ("FGFC "),
          EMB has executed a Secured Note dated as of the Effective Date in
          favor of FGFC Holdings (the "Note"), pursuant to which EMB has agreed
          to pay FGFC Holdings the principal amount of $500,000.00.

     B.   The Note provides, among other things, that, the Obligations of EMB
          thereunder shall be secured by an aggregate of 10,000 shares of the
          common stock of FGFC and 100,000 shares of Series A convertible
          preferred stock of FGFC all acquired by EMB in connection with the
          Purchase Agreement (collectively, the "Collateral Shares"), to be
          released to FGFC Holdings under the terms of the Note and the Security
          Agreement of even date herewith that is being executed in connection
          with the execution of this Collateral Agreement (the "Security
          Agreement").

     NOW, THEREFORE, in consideration of the premises and mutual covenants set
forth herein, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, FGFC Holdings and EMB, intending
to be legally bound hereby, agree as follows:

     1.   Appointment of Collateral Agent; Commencement and Termination.

          (a)  EMB and FGFC Holdings hereby nominate, constitute and appoint
               Randolf W. Katz, Esq. of Bryan Cave LLP as Collateral Agent (the
               "Collateral Agent") upon the terms and conditions set forth in
               this Agreement, the Note and the Security Agreement. It is
               intended by the Parties and the Collateral Agent that, to the
               extent required in order to perfect FGFC Holdings's first lien
               position in the Collateral Shares, the Collateral Agent shall be
               deemed an agent of FGFC Holdings.

          (b)  EMB shall deliver to the Collateral Agent contemporaneously with
               the execution of this Agreement a certificate or certificates
               representing the Collateral Shares as provided for under the

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               terms of the Security Agreement. The Collateral Shares shall not
               be registered under the Securities Act of 1933 or any state blue
               sky law and shall bear a restrictive legend so indicating.

          (c)  The Collateral Agent agrees to act in accordance with the
               provisions of the Security Agreement, the Note, and this
               Collateral Agreement. The Collateral Agent shall be reimbursed by
               EMB promptly upon submission of an invoice or invoices on a
               monthly basis for all of the Collateral Agent's fees at his
               standard hourly rates and out-of-pocket expenses, if any,
               incurred in connection with this Collateral Agreement.

     2.   General Instructions. Unless and until any of the events or
contingencies specified in this Collateral Agreement shall occur, the Collateral
Agent shall hold and retain in his possession at all times all of the Collateral
Shares.

     3.   Disposition of the Collateral Shares. The disposition of the
Collateral Shares shall be governed by the Security Agreement.

     4.   Receipts. Any of the Parties or the Collateral Agent may, at its
option, demand a receipt as a condition of the delivery of any payments, stock
certificates, securities or documents under this Collateral Agreement

     5.   Liability of the Collateral Agent. The Collateral Agent (which term
for purposes of this Section 5 shall refer to any and all affiliates of the
Collateral Agent) shall not be liable for any error of judgment or for any act
done or omitted by him in good faith, or for anything he may in good faith do or
refrain from doing in connection with this Agreement; nor for any negligence
other than his gross negligence; nor shall the Collateral Agent be answerable
for the default or misconduct of his agents, attorneys or employees, if they be
selected with reasonable care; nor will any liability be incurred by the
Collateral Agent, if, in the event of any dispute or question as to his duties
or obligations under this Agreement, he acts in accordance with advice of his
legal counsel. The Collateral Agent is authorized to act upon any document
believed by him to be genuine and to be signed by one or more of the Parties,
and will incur no liability in so acting.

     6.   Resignation or Removal of Collateral Agent. The Collateral Agent may
resign at any time, upon thirty (30) days' prior written notice to FGFC Holdings
and EMB, and may be removed by the mutual consent of FGFC Holdings and EMB, upon
at least thirty (30) days' prior notice to the Collateral Agent. Prior to the
effective date of the resignation or removal of the Collateral Agent, or any
successor Collateral Agent, FGFC Holdings and EMB shall appoint a successor
collateral agent to hold the Collateral Shares then held by the Collateral
Agent, and any such successor collateral agent shall execute and deliver to the
predecessor collateral agent and to FGFC Holdings and EMB an instrument
accepting such appointment, and thereupon such successor collateral agent shall,
without further act, become vested with all the rights and powers of the
predecessor collateral agent as if originally named in this Collateral
Agreement, and shall thereafter become subject to the duties of the predecessor
collateral agent. If FGFC Holdings and EMB are unable to agree on a successor
collateral agent by the effective date of the resignation or removal of the
Collateral Agent, or any successor collateral agent, the Collateral Shares then
held by the Collateral Agent or such successor collateral agent shall be

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deposited with a party that shall be selected by EMB provided that EMB shall
provide a written opinion of its legal counsel (who shall be reasonably
acceptable to FGFC Holdings) that the holding of the Collateral Shares by such
party shall permit FGFC Holdings to obtain and maintain a valid perfected first
lien position in the Collateral Shares.

     7.   Governing Document. In the event that any terms, provisions, rights,
duties, or obligations set forth in this Collateral Agreement should be in
conflict with any terms, provisions, rights, duties, or obligations set forth in
the Note, the Security Agreement or any agreements collateral thereto, the
terms, provisions, rights, duties, or obligations set forth in the Security
Agreement shall control and the conduct of the Collateral Agent shall be
governed accordingly.

     8.   Notices. Any notice required to be given under this Collateral
Agreement or which may be given under this Collateral Agreement to any party or
the Collateral Agent shall be in writing and shall be deemed given: (a) upon
receipt if delivered or sent by identified telecopier; or (b) one (1) business
day after being sent via reputable overnight courier, prepaid; (c) or three (3)
business days after being sent by registered or certified mail, postage
prepaid, return receipt requested; or (d) personally delivered to the Parties or
the Collateral Agent at their respective addresses or telecopy numbers set forth
below:

          If to FGFC Holdings:               FGFC Holdings, Inc.
                                             Attn:  Rodney K. Thompson
                                             3 Hutton Center Drive
                                             Suite 150
                                             Santa Ana, California 92707
                                             (Fax Number: 714-850-9920)

          If to EMB:                         EMB Corporation
                                             Attention: Chief Executive Officer
                                             5075 Warner Avenue
                                             Suite B
                                             Huntington Beach, California 92649
                                             (Fax Number:  714-377-2123)

          With a copy to:                    Bryan Cave LLP
          (which shall not                   Attention:  Randolf W. Katz, Esq.
          constitute notice)                 2020 Main Street, Suite 600
                                             Irvine, California 92614
                                             (Fax Number:  949-223-7100)

          If to Collateral Agent:            Bryan Cave LLP
                                             Attention:  Randolf W. Katz, Esq.
                                             2020 Main Street, Suite 600
                                             Irvine, California 92614
                                             (Fax Number:  949-223-7100)

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or such other address as shall be furnished in writing by the appropriate
person, and any such notice or communication shall be deemed to have been given
as of the date so mailed.

     9.   Miscellaneous.

          (a)  Entire Agreement and Modification. Except as expressly reserved
               or otherwise provided herein, this Collateral Agreement
               constitutes the entire agreement between the Parties with regard
               to its subject matter. The Collateral Agent shall not be bound by
               any modification of this Collateral Agreement unless there is
               delivered to the Collateral Agent a written modification signed
               by the Parties. No such modification shall, without the prior
               written consent of the Collateral Agent, modify the provisions of
               this Collateral Agreement relating to the duties, obligations or
               rights of the Collateral Agent.

          (b)  Words and Phrases. Words and phrases such as "to this Agreement,"
               "herein," "hereinafter," "hereto," "hereof," "hereby,"
               "hereinbelow," and "hereunder" when used with reference to this
               Collateral Agreement, refer to this Collateral Agreement as a
               whole, unless the context otherwise requires.

          (c)  Severability. If any provision of this Collateral Agreement is
               determined by a court of competent jurisdiction to be invalid,
               void or unenforceable, the provisions that have not been held
               invalid or unenforceable shall remain in full force and effect
               and shall in no way be affected, impaired or invalidated.

          (d)  No Waiver. No failure or delay on the part of either the Parties
               of the Collateral Agent, or any of them, in exercising any right,
               power or privilege under this Agreement shall constitute a waiver
               thereof or of any other right, power or privilege under this
               Collateral Agreement.

          (e)  Gender and Number. Wherever from the context of this Collateral
               Agreement it appears appropriate, each term stated in either the
               singular or the plural, and pronouns stated in either the
               masculine, feminine or neuter gender, shall include the
               masculine, feminine and neuter.

          (f)  Consent to Jurisdiction; Choice of Law. Any and all claims by or
               against any of the Parties and/or the Collateral Agent shall be
               decided under the laws of the State of California, with venue in
               Orange County, California and each of the Parties and the
               Collateral Agent hereby consent to the exclusive jurisdiction of,
               and agrees not to commence any action in a court other than, the
               state and/or federal courts of the State of California for the
               purpose of making claims under this Collateral Agreement. Each
               Party and the Collateral Agent irrevocably and unconditionally
               waives any objection to the laying of venue in Orange County,
               California, in connection with any action that may be brought

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               hereunder in the state and/or federal courts of the State of
               California, and hereby further irrevocably and unconditionally
               waives and agrees not to plead or claim in any such court that
               any such action brought in any such court has been brought in an
               inconvenient form.

          (g)  Benefit. This Collateral Agreement shall be binding upon and
               inure to the benefit of the Parties, the Collateral Agent, their
               respective, successors and assigns.

          (h)  Counterparts. This Collateral Agreement may be executed by the
               Parties and the Collateral Agent in separate counterparts, each
               of which when so executed and delivered shall be an original, but
               all such counterparts shall together constitute one and the same
               instrument. Each counterpart may consist of a number of copies
               hereof each signed by less than all, but altogether signed by the
               Collateral Agent and all of the Parties hereto.

IN WITNESS WHEREOF, the Parties and Collateral Agent have hereunto set their
hands and seals as of the date first above written.

EMB CORPORATION

By:  /s/  James E. Shipley
     -----------------------------
          James E. Shipley
          Chairman and CEO

                  "EMB"

FGFC HOLDINGS, INC.

By:  /s/  Rodney K. Thompson
     -----------------------------
          Rodney K. Thompson
          President

                  "FGFC Holdings"

/s/  Randolf W. Katz
-----------------------------
     Randolf W. Katz, Esq.

                  "Collateral Agent"

                                       5EXHIBIT 4.3

THE SECURITIES EVIDENCED BY THIS PROMISSORY NOTE HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED, OR STATE SECURITIES LAWS. THE SECURITIES
MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED, HYPOTHECATED OR OTHERWISE
TRANSFERRED OR DISPOSED OF EXCEPT IN COMPLIANCE WITH THE SECURITIES ACT OF 1933,
APPLICABLE STATE SECURITIES LAWS AND THE APPLICABLE RULES AND REGULATIONS
THEREUNDER.

                                                             Englewood, Colorado

$__________________                                          ___________________
      (Amount)                                                     (Date)

                       ADVANCE DISPLAY TECHNOLOGIES, INC.
              Series E 10% Convertible, Redeemable Promissory Note

     Advance Display Technologies, Inc., a Colorado corporation (the "Company"),
for value received hereby promises to pay to _________________ ("Holder"), or
registered assigns, the principal sum of ___________________ Dollars
($___________ ), together with accrued interest, at the office of the Company in
Englewood, Colorado on _______________.

     Interest shall accrue from the date hereof on the amount of principal from
time to time owed on this Note at the rate of __________ (____ %) per annum,
payable at maturity.

     This note is one of a series of similar Notes issued by the Company in the
total principal amount of $___________ . The Company also has outstanding Series
A, Series B, Series C and Series D Notes for an aggregate total of
$_____________ . The Notes differ from each other only with regard to the date,
principal amount, conversion rate, due date and the Holder.

Conversion

     At the option of the Holder hereof, the principal on this Note or any
portion thereof may be converted into Common Stock of the Company at any time
prior to maturity, unless the Note is sooner called as set forth below, at a
conversion rate of $____________ per share of Common Stock. No fractional shares
will be issued in connection with any conversion; shares will be rounded to the
next highest number for purposes of determining the conversion rights. All
Common Stock to be issued by the Company in conversion of the Notes shall be
issued pursuant to an exemption from registration requirements of the 1933 Act,
and accordingly, bear the restrictive legend required by Rule 144. If the
principal amount of this Note is so converted, accrued interest on this Note to
the date of conversion shall be paid in cash on __________ ; provided, however,
the Company may elect to pay the interest through issuance of Common Stock at a
conversion rate of $____________ per share of Common Stock, either at the date
of conversion, or at maturity. In such event, notice of the Company's decision
to issue Common Stock in payment of the interest shall be given to the Holders
in writing, and the Common Stock shall be issued within a reasonable time
thereafter. No interest on interest shall accrue except in the event of default.

<PAGE>

Conversion of this Note shall require surrender of this Note, either for
cancellation (if the entire Note is converted) or reissuance in a new principal
amount (if a portion is converted).

     The conversion rate may be amended upon the occurrence of certain events.
In the event the Company's Common Stock shall be split, combined or reclassified
prior to conversion or maturity, the number of shares into which this Note is
convertible shall be adjusted accordingly such that the Holder, upon conversion,
may obtain the same number of shares to which he would have been entitled prior
to such split, combination or reclassification.

     The Holder of the Note may exercise the conversion right by surrendering to
the Company or any transfer agent of the Company, the original of this Note,
accompanied by written notice specifying the principal amount to be converted.
Conversion shall be deemed effective on the date when delivery of notice of an
election to convert and the original Note is made and shall be referred to as
the "Conversion Date". As promptly as practical thereafter, the Company shall
issue and deliver to or upon the written order of such Holder, one or more
certificates for the number of full shares of Common Stock to which such Holder
is entitled. The Holder shall be deemed a holder of record of the Common Stock
on the applicable Conversion Date. Upon conversion of only a portion of the
Note, the Company shall issue and deliver to or upon the written order of the
Holder, at the expense of the Company, a new Note covering the remaining
principal amount unconverted by the Holder.

Redemption

     This Note and others of a similar series may be called for redemption at
the option of the Company at any time after ____________ and up to ___________.
There is no mandatory redemption or sinking fund obligation with respect to the
Notes. If fewer than all of the Notes are called by the Company, the Company
will select those Notes to be redeemed pro rata or by lot in such manner as the
Board of Directors may determine.

     Upon notice of redemption by the Company, and following expiration of the
notice period set forth therein, the Company shall pay the principal amount of
the Note, together with interest at the specified rate up to and including the
date of payment (the "Redemption Amount"). Following payment of the redemption
price, all rights of the Holder under this Note shall be extinguished. Interest
on the Notes shall cease to accrue on the date on which payment is actually
made. The right of the Holder to receive payment of the principal and accrued
interest on the Note shall terminate twelve (12) months from the date of notice
set forth herein. Following the expiration of that twelve (12) month period, the
Note shall be void and of no further effect.

     Notice of the Company's option to call the Notes shall be sent by or on
behalf of the Company by certified mail, postage prepaid, to the Holders of
record of all Notes at the respective addresses as they appear on the records of
the Company, no less than thirty (30) days prior to the date scheduled for
payment. Such notice shall set forth (i) the election of the Company to call the
Notes; (ii) the date of payment; (iii) the place or places at which the Notes
may be surrendered for payment of the principal thereof; and (iv) stating the
name and address of any agent selected by the Company to assist in such payment.
Notwithstanding the foregoing provisions, the Company may act as payment agent.

<PAGE>

     If notice of the Company's decision to call the Notes shall have been given
as set forth above, the Holder's right to convert the Note into Common Stock
shall terminate following expiration of thirty (30) days from the date of
notice. For purposes of this paragraph, the date of notice shall be deemed the
date such notice was placed in the United States Mail, posted and addressed as
set forth above. Notwithstanding the provisions of this paragraph, if the
Company shall fail to make payment of the Redemption Amount on the date
established for such payment, then each Holder, including the Holder of this
Note, shall be entitled to convert into Common Stock up to and including the
date of actual payment.

Miscellaneous

     Subject to compliance with applicable Federal and state securities laws, if
any, this Note will be transferrable upon its surrender at the office of the
Company in Englewood, Colorado, duly endorsed or accompanied by written
instrument of transfer in a form which is satisfactory to the Company and duly
executed by the Holder thereof or by his attorney, duly authorized in writing.
Any Notes issued upon exchange or transfer shall be issuable in like principal
amount. No service charge will be made for any such transfer or exchange, but
the Company may require payment of a sum sufficient to cover any tax or other
governmental charges in connection with the transfer.

     The Company acknowledges that this Note evidences a business loan, and not
a consumer loan nor a consumer-related loan as defined in the Colorado Uniform
Consumer Credit Code.

     The Company, all endorsers hereof, and each of them, hereby expressly waive
presentment, demand, notice of dishonor, protest, notice of protest and
nonpayment, and expressly waive any right or defense of setoff for claims which
the Company may have against the Holder.

     No failure on the part of the Holder to exercise, and no delay in
exercising any right hereunder shall operate as a waiver of such right; nor
shall any single or partial exercise by Holder of any right hereunder preclude
the exercise of any other right. The remedies herein provided for are cumulative
and not exclusive of any remedies provided by law.

     It is agreed that if this Note is not paid when due or declared due
hereunder, and following five (5) days advance written notice by Holder and an
opportunity to cure a default, the entire principal and accrued interest thereon
shall draw interest at the rate of twelve percent (12%) per annum, and that
failure to make any payment or principal or interest when due shall cause the
whole Note to become due at once, or the interest to be counted as principal, at
the option of the Holder of the Note. The Company agrees to any extension of
time of payment and partial payments before, at or after maturity and, in the
event that suit is brought to collect this Note or enforce any provision
thereof, agrees to pay all reasonable costs of collection, including reasonable
attorney's fees.

<PAGE>

     This Note is made in and shall be governed by and interpreted in accordance
with the laws of the State of Colorado.

                                          ADVANCE DISPLAY TECHNOLOGIES, INC.
                                          a Colorado corporation

                                          By:
                                          --------------------------------------
                                          Matthew W. Shankle
                                          President

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