<PAGE>   1


                                                                    EXHIBIT 4.14



NEITHER THIS WARRANT NOR THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT
HAS BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE
SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN
AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION
REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE
SECURITIES LAWS.


                                     WARRANT

                               FOR COMMON STOCK OF

                                 SHELDAHL, INC.


WARRANT NO.   5


                  THIS CERTIFIES that, for value received, U.S. Bancorp Piper
Jaffray, or its permitted assigns (collectively, the "Holder"), is entitled to
purchase from Sheldahl, Inc., a Minnesota corporation (the "Company"), at any
time, and from time to time, during the exercise period referred to in Section 1
hereof 175,000 fully paid, validly issued and nonassessable shares (the "Warrant
Shares") of common stock of the Company, par value $0.25 (the "Common Stock"),
at the exercise price of $2.770559 per share (the "Warrant Price"). Securities
issuable upon exercise of this Warrant and the exercise price payable therefor
are subject to adjustment from time to time as hereinafter set forth. As used
herein, the term "Warrant" shall include any warrant or warrants hereafter
issued in consequence of the exercise of this Warrant in part or transfer of
this Warrant in whole or in part. This Warrant is being issued pursuant to that
certain Engagement Letter, dated as of November 22, 1999, as amended on October
20, 2000, between the Company, and U.S. Bancorp Piper Jaffray (the "Engagement
Letter").

1.   Exercise; Payment for Ownership Interest.

     (a) Upon the terms and subject to the conditions set forth herein, this
Warrant may be exercised in whole or in part by the Holder hereof at any time,
or from time to time, on or after the Closing (as defined in the Purchase
Agreement) and prior to 5 p.m. Minneapolis time on the seventh anniversary of
the date of the Closing, by presentation and surrender of this Warrant to the
principal offices of the Company, or at the office of its Transfer Agent (as
hereinafter defined), if any, together with the Purchase Form annexed hereto,
duly executed, and accompanied by payment to the Company of an



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amount equal to the Warrant Price multiplied by the number of Warrant Shares as
to which this Warrant is then being exercised. The Holder of this Warrant shall
be deemed to be a shareholder of the Warrant Shares as to which this Warrant is
exercised in accordance herewith effective immediately after the close of
business on the date on which the Holder shall have delivered to the Company
this Warrant in proper form for exercise and payment of the Warrant Price for
the number of Warrant Shares as to which the exercise is being made,
notwithstanding that the stock transfer books of the Company shall be then
closed or that certificates representing such Warrant Shares shall not then be
physically delivered to the Holder.

     (b) All or any portion of the Warrant Price may be paid by surrendering
Warrants effected by presentation and surrender of this Warrant to the Company,
or at the office of its Transfer Agent, if any, with a Cashless Exercise Form
annexed hereto duly executed (a "Cashless Exercise"). Such presentation and
surrender shall be deemed a waiver by the Company of the Holder's obligation to
pay all or any portion of the aggregate Warrant Price. Except as provided in
Section 3(b) below, in the event of a Cashless Exercise, the Holder shall
exchange its Warrant for that number of shares of Common Stock determined by
multiplying the number of Warrant Shares for which the Holder desires to
exercise this Warrant by a fraction, the numerator of which shall be the
difference between the then current market price per share of the Common Stock
and the Warrant Price, and the denominator of which shall be the then current
market price per share of Common Stock. For purposes of any computation under
this Section 1(b), the then current market price per share of Common Stock at
any date shall be deemed to be the average for the ten consecutive business days
immediately prior to the Cashless Exercise of the daily closing prices of the
Common Stock on the principal national securities exchange on which the Common
Stock is admitted to trading or listed, or if not listed or admitted to trading
on any such exchange, the closing prices as reported by the Nasdaq National
Market or, if applicable, the Nasdaq SmallCap Market, or if not then included
for quotation on the Nasdaq National Market or the Nasdaq SmallCap Market, the
average of the highest reported bid and lowest reported asked prices as reported
by the OTC Bulletin Board or the National Quotations Bureau, as the case may be,
or if not then publicly traded, the fair market price, not less than book value
thereof, of the Common Stock as determined in good faith by the independent
members of the Board of Directors of the Company.

     (c) If this Warrant shall be exercised in part only, the Company shall,
upon surrender of this Warrant for cancellation, execute and deliver a new
Warrant evidencing the rights of the Holder thereof to purchase the balance of
the Warrant Shares purchasable hereunder as to which the Warrant has not been
exercised. If this Warrant is exercised in part, such exercise shall be for a
whole number of Warrant Shares. Upon any exercise and surrender of this Warrant,
the Company (i) will issue and deliver to the Holder a certificate or
certificates in the name of the Holder for the largest whole number of Warrant
Shares to which the Holder shall be entitled and, if this Warrant is exercised
in whole, in lieu of any fractional Warrant Share to which the Holder otherwise
might be entitled, cash in an amount equal to the fair value of such



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<PAGE>   3

fractional Warrant Share (determined in such reasonable and equitable manner as
the Board of Directors of the Company shall in good faith determine), and (ii)
will deliver to the Holder such other securities, properties and cash which the
Holder may be entitled to receive upon such exercise, or the proportionate part
thereof if this Warrant is exercised in part, pursuant to the provisions of this
Warrant.

2.   Anti-Dilution Provisions. The Warrant Price in effect at any time and the
number and kind of securities issuable upon exercise of this Warrant shall be
subject to adjustment from time to time upon happening of certain events as
follows:

     2.1 Reorganization, Reclassification, Consolidation, Merger or Sale. If any
capital reorganization, reclassification or any other change of capital stock of
the Company, or any consolidation or merger of the Company with another person,
or the sale or transfer of all or substantially all of its assets to another
person shall be effected in such a way that holders of shares of Common Stock
shall be entitled to receive stock, securities or assets with respect to or in
exchange for their shares of Common Stock, then provision shall be made by the
Company, in accordance with this Section 2.1, whereby the Holder hereof shall
thereafter have the right to purchase and receive, upon the basis and upon the
terms and conditions specified in this Warrant and in addition to or in exchange
for, as applicable, the Warrant Shares subject to this Warrant immediately
theretofore purchasable and receivable upon the exercise of the rights
represented hereby, such securities or assets as would have been issued or
payable with respect to or in exchange for the aggregate Warrant Shares
immediately theretofore purchasable and receivable upon the exercise of the
rights represented hereby if exercise of the Warrant had occurred immediately
prior to such reorganization, reclassification, consolidation, merger or sale.
The Company will not effect any such consolidation, merger, sale, transfer or
lease unless prior to the consummation thereof the successor entity (if other
than the Company) resulting from such consolidation or merger or the entity
purchasing such assets shall assume by written instrument (i) the obligation to
deliver to the Holder such securities or assets as, in accordance with the
foregoing provisions, the Holder may be entitled to purchase, and (ii) all other
obligations of the Company under this Warrant; provided, however, that the
failure to comply with the foregoing shall not affect the validity or legality
of such consolidation, merger, sale, transfer or lease. The provisions of this
Section 2.1 shall similarly apply to successive consolidations, mergers,
exchanges, sales, transfers or leases. In the event that in connection with any
such capital reorganization or reclassification, consolidation, merger, sale or
transfer, additional shares of Common Stock shall be issued in exchange,
conversion, substitution or payment, in whole or in part, for a security of the
Company other than Common Stock, any such issue shall be treated as an issue of
Common Stock covered by the provisions of Section 2.2 hereof.

     2.2 Stock Dividends and Securities Distributions. If, at any time or from
time to time after the date of this Warrant, the Company shall distribute to the
holders of shares of Common Stock (i) securities (including rights, warrants,
options or another form of convertible securities), (ii) property, other than
cash, or (iii) cash, without fair payment



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therefor, then, and in each such case, the Holder, upon the exercise of this
Warrant, shall be entitled to receive such securities, property and cash which
the Holder would hold on the date of such exercise if, on the date of the
distribution, the Holder had been the holder of record of the shares of Common
Stock issued upon such exercise and, during the period from the date of this
Warrant to and including the date of such exercise, had retained such shares of
Common Stock and the securities, property and cash receivable by the Holder
during such period, subject, however, to the Holder agreeing to any conditions
to such distribution as were required of all other holders of shares of Common
Stock in connection with such distribution.

     2.3 Other Adjustments. In addition to those adjustments set forth in
Sections 2.1 and 2.2, but without duplication of the adjustments to be made
under such Sections, if the Company:

          (i) declares or pays a dividend or makes a distribution on its Common
     Stock in shares of its Common Stock;

          (ii) subdivides or reclassifies its outstanding shares of Common Stock
     into a greater number of shares;

          (iii) combines or reclassifies its outstanding shares of Common Stock
     into a smaller number of shares;

          (iv) makes a distribution on its Common Stock in shares of its capital
     stock other than Common Stock; and/or

          (v) issues, by reclassification of its Common Stock, any shares of its
     capital stock;

then the number and kind of Warrant Shares purchasable upon exercise of this
Warrant shall be adjusted so that the Holder upon exercise hereof shall be
entitled to receive the kind and number of Warrant Shares or other securities of
the Company that the Holder would have owned or have been entitled to receive
after the happening of any of the events described above had this Warrant been
exercised immediately prior to the happening of such event or any record date
with respect thereto. An adjustment made pursuant to this Section 2.3 shall
become effective immediately after the record date in the case of a dividend or
distribution and shall become effective immediately after the effective date in
the case of a subdivision, combination or issuance. If, as a result of an
adjustment made pursuant to this Section 2.3, the Holder of this Warrant
thereafter surrendered for exercise shall become entitled to receive shares of
two or more classes of capital stock or shares of Common Stock and any other
class of capital stock of the Company, the Board of Directors (whose
determination shall be conclusive and shall be described in a written notice to
all holders of Warrants promptly after such adjustment) shall determine the
allocation of the adjusted Warrant Price between or among shares of such classes
of capital stock or shares of Common Stock and such other class of capital
stock.



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<PAGE>   5



     The adjustment to the number of Warrant Shares purchasable upon the
exercise of this Warrant described in this Section 2.3 shall be made each time
any event listed in paragraphs (i) through (v) of this Section 2.3 occurs.

     Simultaneously with all adjustments to the number and/or kind of
securities, property and cash under this Section 2.3 to be issued in connection
with the exercise of this Warrant, the Warrant Price will also be appropriately
and proportionately adjusted.

     In the event that at any time, as a result of an adjustment made pursuant
to this Section 2.3, the Holder of this Warrant thereafter shall become entitled
to receive any shares of the Company, other than Common Stock, thereafter the
number of such other shares so receivable upon exercise of this Warrant shall be
subject to adjustment from time to time in a manner and on terms as nearly
equivalent as practicable to the provisions with respect to the Common Stock
contained in Sections 2.1 and 2.2 above.

     2.4 Notice of Adjustments. Upon the occurrence of each adjustment or
readjustment of the Warrant Price pursuant to this Section 2, the Company at its
expense will promptly compute such adjustment or readjustment in accordance with
the terms of this Warrant and prepare a certificate setting forth such
adjustment or readjustment, including a statement of the adjusted Warrant Price
or adjusted number of Warrant Shares, if any, issuable upon exercise of each
Warrant, describing the transaction giving rise to such adjustments and showing
in detail the facts upon which such adjustment or readjustment is based. The
Company will forthwith mail, by first class mail, postage prepaid, a copy of
each such certificate to the Holder of this Warrant at the address of such
Holder as shown on the books of the Company, and to its Transfer Agent.

     2.5 Other Notices. If at any time:

     (a) the Company shall (i) offer for subscription pro rata to the holders of
shares of the Common Stock any additional equity in the Company or other rights;
(ii) pay a dividend in additional shares of the Common Stock or distribute
securities or other property to the holders of shares of the Common Stock
(including, without limitation, evidences of indebtedness and equity and debt
securities) (other than dividends payable in the form of the Company's Common
Stock to holders of the Company's Series D, E, F and G Convertible Preferred
Stock or other series of preferred stock); or (iii) issue securities convertible
into, or rights or warrants to purchase, securities of the Company;

     (b) there shall be any capital reorganization or reclassification or
consolidation or merger of the Company with, or sale, transfer or lease of all
or substantially all of its assets to, another entity; or

     (c) there shall be a voluntary or involuntary dissolution, liquidation or
winding up of the Company;



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<PAGE>   6


then, in any one or more of said cases, the Company shall give, by first class
mail, postage prepaid, to the Holder of this Warrant at the address of such
Holder as shown on the books of the Company, (a) at least 15 days' prior written
notice of the date on which the books of the Company shall close or a record
shall be taken for such subscription rights, dividend, distribution or issuance,
and (b) in the case of any such reorganization, reclassification, consolidation,
merger, sale, dissolution, liquidation or winding up, at least 15 days' prior
written notice of the date when the same shall take place if no stockholder vote
is required and at least 15 days' prior written notice of the record date for
stockholders entitled to vote upon such matter if a stockholder vote is
required. Such notice in accordance with the foregoing clause (a) shall also
specify, in the case of any such subscription rights, the date on which the
holders of shares of Common Stock shall be entitled to exercise their rights
with respect thereto, and such notice in accordance with the foregoing clause
(b) shall also specify the date on which the holders of shares of Common Stock
shall be entitled to exchange their shares of Common Stock for securities or
other property deliverable upon such reorganization, reclassification,
consolidation, merger, sale, dissolution, liquidation or winding up, as the case
may be. Failure to give the notice referred to herein shall not affect the
validity or legality of the action which should have been the subject of the
notice.

     2.6 No adjustment in the Warrant Price shall be required unless such
adjustment would require an increase or decrease of at least one cent ($0.01) in
such price; provided, however, that any adjustments which by reason of this
Section 2.6 are not required to be made shall be carried forward and taken into
account in any subsequent adjustment required to be made hereunder. All
calculations under this Section 2 shall be made to the nearest cent or to the
nearest one-hundredth of a share, as the case may be.

3.   No Voting Rights. This Warrant shall not be deemed to confer upon the
Holder any right to vote or to consent to or receive notice as a stockholder of
the Company, as such, in respect of any matters whatsoever, or any other rights
or liabilities as a stockholder, prior to the exercise hereof.

4.   Warrants Transferable. This Warrant and all rights hereunder are
transferable, in whole or in part, at the principal offices of the Company by
the Holder hereof, upon surrender of this Warrant properly endorsed; provided,
that this Warrant and all rights hereunder may be transferred only (i) to
affiliates, officers or empoyees of the Holder, (ii) in a transaction exempt
from registration under the 1933 Act, provided that the Company receives an
opinion of counsel that such transfer may be effected without registration under
the 1933 Act; or (iii) pursuant to the registration of this Warrant or the
Warrant Shares under the 1933 Act or subsequent to one year from the date hereof
pursuant to an available exemption from such registration. It shall be a
condition to transfer of this Warrant that the transferee agrees to be bound by
the restrictions on transfer contained in this Section 4.

5.   Warrants Exchangeable; Assignment; Loss, Theft, Destruction, Etc. This
Warrant is



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exchangeable, without expense, upon surrender hereof by the Holder hereof at the
principal offices of the Company, or at the office of its Transfer Agent, if
any, for new Warrants of like tenor representing in the aggregate the right to
subscribe for and purchase the Warrant Shares which may be subscribed for and
purchased hereunder, each such new Warrant to represent the right to subscribe
for and purchase such Warrant Shares as shall be designated by such Holder
hereof at the time of such surrender. Upon surrender of this Warrant to the
Company at its principal office, or at the office of its Transfer Agent, if any,
with an instrument of assignment duly executed and funds sufficient to pay any
transfer tax, the Company shall, without charge, execute and deliver a new
Warrant in the name of the assignee named in such instrument of assignment and
this Warrant shall promptly be cancelled. This Warrant may be divided or
combined with other warrants which carry the same rights upon presentation
hereof at the principal office of the Company, or at the office of its Transfer
Agent, if any, together with a written notice specifying the names and
denominations in which new Warrants are to be issued and signed by the Holder
hereof. The term "Warrant" as used herein includes any Warrants into which this
Warrant may be divided or exchanged. Upon receipt of evidence satisfactory to
the Company of the loss, theft, destruction or mutilation of this Warrant and,
in the case of any such loss, theft or destruction, upon delivery of a bond or
indemnity satisfactory to the Company, or, in the case of any such mutilation,
upon surrender or cancellation of this Warrant, the Company will issue to the
Holder hereof a new Warrant of like tenor, in lieu of this Warrant, representing
the right to subscribe for and purchase the Warrant Shares which may be
subscribed for and purchased hereunder. Any such new Warrant executed and
delivered shall constitute an additional contractual obligation of the Company,
whether or not this Warrant so lost, stolen, destroyed, or mutilated shall be at
any time enforceable by anyone.

6.   Legend. Any certificate evidencing the securities issued upon exercise of
this Warrant shall bear a legend in substantially the following form:

                  THESE SECURITIES HAVE NOT BEEN REGISTERED WITH THE SECURITIES
         AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN
         RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT
         OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT
         BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION
         STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE
         EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION
         REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE
         STATE SECURITIES LAWS.

                  THE CORPORATION WILL FURNISH TO ANY SHAREHOLDER UPON REQUEST
         AND WITHOUT CHARGE, A FULL STATEMENT OF THE DESIGNATIONS, PREFERENCES,
         LIMITATIONS AND RELATIVE RIGHTS OF THE SHARES OF EACH CLASS OR SERIES
         OF CAPITAL STOCK



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         AUTHORIZED TO BE ISSUED, SO FAR AS THEY HAVE BEEN DETERMINED, AND
         THE AUTHORITY OF THE BOARD TO DETERMINE THE RELATIVE RIGHTS AND
         PREFERENCES OF THE SUBSEQUENT CLASSES OR SERIES.

                  THE SHARES OF COMMON STOCK OF SHELDAHL, INC. INTO WHICH THE
         SECURITIES REPRESENTED BY THIS CERTIFICATE ARE CONVERTIBLE ENTITLE THE
         HOLDER THEREOF TO CERTAIN RIGHTS AS SET FORTH IN THE RIGHTS AGREEMENT
         BETWEEN SHELDAHL, INC. AND WELLS FARGO BANK, N.A., DATED AS OF JUNE 16,
         1996 AND AMENDED ON JULY 25, 1998 AND NOVEMBER 10, 2000 (THE "RIGHTS
         AGREEMENT"), A COPY OF WHICH IS ON FILE AT THE PRINCIPAL OFFICES OF
         SHELDAHL, INC. UNDER CERTAIN CIRCUMSTANCES, SUCH RIGHTS ISSUED TO OR
         HELD BY AN ACQUIRING PERSON, OR AFFILIATE OR ASSOCIATE THEREOF (AS
         DEFINED IN THE RIGHTS AGREEMENT), AND ANY SUBSEQUENT HOLDER OF SUCH
         RIGHTS, MAY BECOME NULL AND VOID.


7.   Modifications and Waivers. The terms of the Warrants may be amended,
modified or waived only by the written agreement of the Company and the Holder.

8.   Miscellaneous. The Company shall pay all expenses and other charges payable
in connection with the preparation, issuance and delivery of this Warrant and
all substitute Warrants. The Holder shall pay all taxes (other than any issuance
taxes, including, without limitation, documentary stamp taxes, transfer taxes
and other governmental charges, which shall be paid by the Company) in
connection with such issuance and delivery of this Warrant and the Warrant
Shares.

     The Company shall maintain, at the office or agency of the Company
maintained by the Company, books for the registration and transfer of the
Warrant.

9.   Reservation of Warrant Shares. Subject to an affirmative vote of the
holders of a majority of the outstanding shares of Common Stock of the Company
to amend the Company's Amended and Restated Articles of Incorporation to
increase the authorized shares of Common Stock in sufficient amount to cover
such reservation, the Company will at all times reserve and keep available, free
from preemptive rights, out of the aggregate of its authorized but unissued
Common Stock or its authorized and issued Common Stock held in its treasury,
solely for the purpose of enabling it to satisfy any obligation to issue Warrant
Shares upon exercise of this Warrant, the maximum number of shares of Common
Stock which may then be deliverable upon the exercise of this Warrant.

     The Company or, if appointed, the Transfer Agent for the Common Stock (the
"Transfer Agent") and every subsequent transfer agent for any shares of the



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Company's capital stock issuable upon the exercise of any of the rights of
purchase aforesaid will be irrevocably authorized and directed at all times to
reserve such number of authorized shares as shall be required for such purpose.
The Company will keep a copy of this Warrant on file with the Transfer Agent and
with every subsequent transfer agent for any shares of the Company's capital
stock issuable upon the exercise of the rights of purchase represented by this
Warrant. The Company will furnish such Transfer Agent a copy of all notices of
adjustments and certificates related thereto transmitted to the Holder pursuant
to Section 2.5 hereof.

     The Company covenants that all Warrant Shares which may be issued upon
exercise of this Warrant will, upon issue, assuming the availability of
sufficient authorized shares of Common Stock of the Company at the time of such
issuance, be fully paid, nonassessable, free of preemptive rights and free from
all taxes, liens, charges and security interests with respect to the issue
thereof.

10.   Descriptive Headings and Governing Law. The descriptive headings of the
several paragraphs of this Warrant are inserted for convenience only and do not
constitute a part of this Warrant. This Warrant shall be construed and enforced
in accordance with the laws of the State of Minnesota, and the rights of the
parties shall be governed by, the law of such State.

     IN WITNESS WHEREOF, this Warrant has been executed as of the 28 day of
December, 2000.


                                            SHELDAHL, INC.


                                             By: /s/ Jill D. Burchill
                                                --------------------------------
                                                 Name: Jill D. Burchill
                                                 Title: Vice President and Chief
                                                        Financial Officer



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<PAGE>   10


                                  PURCHASE FORM



                                                          Dated:__________, ____



                  The undersigned hereby irrevocably elects to exercise the
within Warrant to the extent of purchasing _____ Warrant Shares and hereby makes
payment of $_____________ in payment of the exercise price thereof.



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


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                                CASHLESS EXERCISE



                                                          Dated:__________, ____



                  The undersigned irrevocably elects to exercise the within
Warrant for Warrant Shares and hereby makes payment pursuant to the Cashless
Exercise provision of the within Warrant, and directs that the payment of the
Warrant Price be made by cancellation as of the date of exercise of a portion of
the within Warrant in accordance with the terms and provisions of Section 1(b)
of the within Warrant.



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