
<PAGE>   1
                                                                     EXHIBIT 2.4



THIS AGREEMENT IS MADE the 29th day of April, 1998


BETWEEN: (1)  TURQUOISE INVESTMENTS LTD of P.O. Box 694,George Town,
              Grand Cayman, Cayman Islands (the "Vendor")

AND      (2)  AMKOR TECHNOLOGY, INC. a Delaware Corporation of 1345
              Enterprise Drive, West Chester, Pennsylvania 19380 (the 
              "Purchaser")


WHEREAS:-

The parties wish to record the arrangements made between them in relation to the
sale by the Vendor to the Purchaser of 4,085,000 Shares of US$0.01 nominal value
each (the "Shares") of Amkor International Holdings (the "Company"),
beneficially and legally owned by the Vendor.

NOW IT IS HEREBY AGREED as follows:

1.      The Vendor shall sell and the Purchaser shall purchase the legal and
        beneficial interest in the Shares effective on the date hereof (the
        "Closing Date"). On the Closing Date, the Purchaser shall issue to the
        Vendor 4,085,000 shares of stock of US$0.01 par value each of the
        Purchaser (the "Purchaser Shares"), issued as fully paid and non
        assessable, and the receipt by the Vendor of the Purchaser Shares issued
        by the Purchaser shall be good and sufficient discharge of the
        obligation of the Purchaser to pay the purchase price for the Shares and
        the receipt by the Purchaser of the Shares issued by Vendor shall be
        good and sufficient discharge of the obligation of the Purchaser to pay
        the purchase price for the Purchaser Shares.

2.      The Vendor hereby represents, warrants and acknowledges that:-

        (a)     The Vendor is the legal and beneficial owner of the Shares
                (having the nominal value described in the recital set out above
                and being fully paid) and has absolute right to sell, assign,
                convey, transfer and deliver the beneficial and legal title in
                such Shares which are free and clear of any liens, claims or
                encumbrances;

        (b)     The Vendor has duly executed and delivered this Agreement and
                this Agreement constitutes valid, legal and binding obligations
                of the Vendor enforceable against the Vendor in accordance with
                its terms;

        (c)     The Vendor has, so far as it is aware, complied with all
                applicable laws and regulations in any relevant jurisdiction
                with regard to the acquisition and transfer of


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                                      -2-


                the Shares.

3.      The Purchaser hereby represents, warrants and acknowledges that:

        (a)     The Purchaser has all requisite legal and corporate power and
                authority to execute and deliver this Agreement, to sell and
                issue the Purchaser Shares hereunder, and to carry out and
                perform its obligations under the terms of this Agreement.

        (b)     All corporate action on the part of the Purchaser, its directors
                and stockholders necessary for the authorization, execution,
                delivery and performance of this Agreement by the Purchaser, the
                authorization, sale, issuance and delivery of the Purchaser
                Shares and the performance of all of the Purchaser's obligations
                hereunder have been or will be taken prior to the Closing Date.

        (c)     This Agreement, when executed and delivered by the Purchaser,
                constitutes a valid and binding obligation of the Purchaser,
                enforceable in accordance with its terms, subject to laws of
                general application relating to bankruptcy, insolvency and the
                relief of debtors and rules of law governing specific
                performance, injunctive relief or other equitable remedies.

        (d)     The Purchaser Shares, when issued in compliance with the
                provisions of this Agreement, will be validly issued, fully paid
                and nonassessable.

        (e)     The Purchaser Shares will be free of any liens or encumbrances
                other than any liens or encumbrances created by or imposed upon
                the holders; provided, however, that the Purchaser Shares are
                subject to restrictions on transfer under state and/or federal
                securities laws and this Agreement.

4.      The parties hereto shall be responsible for their own costs in
        connection with the preparation and negotiation of this Agreement and
        the transactions contemplated hereby.

5.      The obligations of the Vendor under this Agreement will continue after
        payment of the purchase price of the Shares.

6.      The Purchaser acknowledges that in entering into this Agreement, it has
        not relied upon any representation and warranty given by the Vendor
        except as set out in Clause 2 above and in Exhibit A hereto, and the
        Vendor acknowledges that in entering into this Agreement, it has not
        relied upon any representation and warranty given by the Purchaser
        except as set out in Clause 3 above.

7.      Neither the Purchaser Shares nor any beneficial interest therein shall
        be transferred, encumbered or otherwise disposed of in any way except in
        accordance with the provisions 


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                                      -3-

        of this Agreement. Any transferee of the Purchaser Shares shall agree to
        be bound by the terms of this Agreement. The Vendor agrees to execute
        and deliver to Purchaser, concurrently with execution and delivery of
        this Agreement, the Investment Representation Statement attached hereto
        as EXHIBIT A.

8.      (a)     Vendor understands and agrees that Purchaser shall cause the
                legends set forth below or legends substantially equivalent
                thereto, to be placed upon any certificate(s) evidencing
                ownership of the Purchaser Shares together with any other
                legends that may be required by Purchaser or by applicable state
                or federal securities laws:

                THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER
                THE SECURITIES ACT OF 1933 (THE "SECURITIES ACT") AND MAY NOT BE
                OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED
                UNLESS AND UNTIL REGISTERED UNDER THE SECURITIES ACT OR, IN THE
                OPINION OF COUNSEL SATISFACTORY TO THE ISSUER OF THESE
                SECURITIES, SUCH OFFER, SALE OR TRANSFER, PLEDGE OR
                HYPOTHECATION IS IN COMPLIANCE THEREWITH.

        (b)     Stop-Transfer Notices. Vendor agrees that, in order to ensure
                compliance with the restrictions referred to herein, Purchaser
                may issue appropriate "stop transfer" instructions to its
                transfer agent, if any, and that, if Purchaser transfers its own
                securities, it may make appropriate notations to the same effect
                in its own records.

        (c)     Refusal to Transfer. The Company shall not be required (i) to
                transfer on its books any Purchaser Shares that have been sold
                or otherwise transferred in violation of any of the provisions
                of this Agreement or (ii) to treat as owner of such Purchaser
                Shares or to accord the right to vote or pay dividends to any
                purchaser or other transferee to whom such Purchaser Shares
                shall have been so transferred.

9.      This Agreement may be executed in one or more counterparts, each of
        which shall be deemed originals, all of which together shall constitute
        one and the same instrument.

10.     This Agreement shall be binding on and inure for the benefit of the
        parties hereto and their respective successors and the parties each
        agree that they may not assign or transfer any of their rights and
        obligations under this Agreement.

11.     Every notice and communication under this Agreement shall:-

        (a)     be in writing, delivered personally or by prepaid letter, telex
                or telecopier;

        (b)     be deemed to have been received in the case of a telex or
                telecopier at the time of dispatch (provided that if the date of
                dispatch is not a business day in the country of 


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                                      -4-

                the addressee, it shall be deemed to have been received at the
                opening of business on the next such business day and in the
                case of a letter, when delivered personally or seven days after
                being put into the post, prepaid airmail), and

        (c)     be sent to the address of the relevant party given above or to
                such other address notified for that purpose and in the case of
                a telecopy or telex, such number as may have been notified from
                time to time for such purpose.

12.     This Agreement shall be governed by and construed in accordance with the
        laws of the Cayman Islands.

13.     In relation to any legal action or proceedings arising out of or in
        connection with this Agreement ("Proceedings"), the Vendor and the
        Purchaser irrevocably submit to the jurisdiction of the courts of the
        Cayman Islands and waive any objection to Proceedings in such courts,
        whether on the grounds that the Proceedings have been brought in an
        inconvenient forum or otherwise. This submission shall not affect the
        right of the Vendor or the Purchaser to take Proceedings in any other
        court of competent jurisdiction, nor shall the taking of Proceedings in
        any other court of competent jurisdiction preclude any party from taking
        Proceedings in any other court of competent jurisdiction (whether
        concurrently or not).

IN WITNESS WHEREOF this Agreement has been executed on the date first above
mentioned.



Signed for and on behalf of                     )
TURQUOISE INVESTMENTS LTD                       )
                                                )

by: per pro Commerce Corporate Services Limited )
    /s/ Richard McMillan                        )
    ----------------------                      )



Signed for and on behalf of                     )
AMKOR TECHNOLOGY, INC.                          )
by: /s/ James J. Kim                            )
    ----------------------     
                               
 
                                    EXHIBIT A

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                                      -5-



                       INVESTMENT REPRESENTATION STATEMENT

Vendor                  :           Turquoise Investments Ltd.

Purchaser               :           Amkor Technology, Inc.

Securities              :           Common Stock

Amount                  :           4,085,000 Shares of Common Stock

In connection with the purchase of the above-listed Securities, the undersigned
Vendor represents to Purchaser the following:

        (a) Vendor is aware of Purchaser's business affairs and financial
condition and has acquired sufficient information about Purchaser to reach an
informed and knowledgeable decision to acquire the Securities. Vendor is
acquiring these Securities for investment for Vendor's own account only and not
with a view to, or for resale in connection with, any "distribution" thereof
within the meaning of the Securities Act of 1933, as amended (the "SECURITIES
ACT").

        (b) Vendor acknowledges and understands that the Securities constitute
"restricted securities" under the Securities Act and have not been registered
under the Securities Act in reliance upon a specific exemption therefrom, which
exemption depends upon, among other things, the bona fide nature of Vendor's
investment intent as expressed herein. In this connection, Vendor understands
that, in the view of the Securities and Exchange Commission, the statutory basis
for such exemption may be unavailable if Vendor's representation was predicated
solely upon a present intention to hold these Securities for the minimum capital
gains period specified under tax statutes, for a deferred sale, for or until an
increase or decrease in the market price of the Securities, or for a period of
one year or any other fixed period in the future. Vendor further understands
that the Securities must be held indefinitely unless they are subsequently
registered under the Securities Act or an exemption from such registration is
available. Vendor further acknowledges and understands that Purchaser is under
no obligation to register the Securities. Vendor understands that the
certificate evidencing the Securities will be imprinted with a legend which
prohibits the transfer of the Securities unless they are registered or such
registration is not required in the opinion of counsel satisfactory to Purchaser
and any other legend required under applicable state securities laws.

        (c) Vendor is familiar with the provisions of Rule 144, promulgated
under the Securities Act, which, in substance, permits limited public resale of
"restricted securities" acquired, directly or indirectly from the issuer
thereof, in a non-public offering subject to the satisfaction of certain
conditions. The provisions of Rule 144 require the resale to occur not less than
one year after the later of the date the Securities were sold by Purchaser or
the date the Securities were sold by an affiliate of Purchaser, within the
meaning of Rule 144; and, in the case of acquisition of the 


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Securities by an affiliate, or by a non-affiliate who subsequently holds the
Securities less than two years, the satisfaction of certain of the conditions
specified by Rule 144, including: (1) the resale being made through a broker in
an unsolicited "broker's transaction" or in transactions directly with a market
maker (as said term is defined under the Securities Exchange Act of 1934); and,
in the case of an affiliate, (2) the availability of certain public information
about Purchaser, (3) the amount of Securities being sold during any three month
period not exceeding the limitations specified in Rule 144(e), and (4) the
timely filing of a Form 144, if applicable.

        (d) Vendor further understands that in the event all of the applicable
requirements of 144 are not satisfied, registration under the Securities Act,
compliance with Regulation A, or some other registration exemption will be
required; and that, notwithstanding the fact that Rule 144 is not exclusive, the
Staff of the Securities and Exchange Commission has expressed its opinion that
persons proposing to sell private placement securities other than in a
registered offering and otherwise than pursuant to Rules 144 or 701 will have a
substantial burden of proof in establishing that an exemption from registration
is available for such offers or sales, and that such persons and their
respective brokers who participate in such transactions do so at their own risk.
Vendor understands that no assurances can be given that any such other
registration exemption will be available in such event.


                                    Signature of Vendor:
                                    per pro Commerce Corporate Services Limited
                                    /s/ Richard McMillan
                                    -----------------------------------------
                                    Signature of Authorized Signatory

                                    Richard McMillan
                                    -----------------------------------------
                                    Print Name and Title


