
<PAGE>   1
                                                                   EXHIBIT 10.15


                               ASSEMBLY AGREEMENT

This agreement (the "Agreement") is entered into this 17th day of July, 1991, by
and between INTEL CORPORATION (3065 Bowers Avenue, Santa Clara, CA 95051) and
AMKOR ELECTRONICS INCORPORATED (1345 Enterprise Dr., West Chester, PA 19380).

DEFINITIONS OF THE PARTIES:

A.    "Intel" will mean Intel Corporation, a Delaware corporation, who is in the
      business of manufacturing and marketing large scale integrated circuits.

B.    "Amkor" will mean Amkor Electronics Incorporated, a Pennsylvania
      corporation who has entered into an independent business arrangement with
      Anam Industrial Company Ltd., (Anam), whereby Amkor will act on Anam's
      behalf in soliciting and entering into contract assembly arrangements with
      Amkor customers to be performed at Anam.

RECITALS:

A.    Intel is desirous of entering into a contract assembly arrangement with
      Amkor hereto as more specifically identified herein.

B.    Amkor is in the business of doing contract assembly work for integrated
      circuit manufacturers.

C.    The parties hereto desire to set forth below the conditions and covenants
      under which such work will be performed.

NOW THEREFORE, in consideration of the mutual covenants herein contained, the
parties agree as follows:

1.    TERM

      This Agreement will become effective on the date first indicated above and
      will continue for a period of one year, and thereafter will be extended
      automatically for additional one-year periods until terminated as provided
      below.


<PAGE>   2

2.    STATEMENT OF WORK

      a.    Amkor will assemble and/or process all materials received from Intel
            into completed integrated circuits, hereinafter referred to at
            "Units," in accordance with Intel's specifications.

      b.    Intel will supply silicon dice in probed wafer form and certain
            assembly materials (as outlined below). hereinafter referred to as
            "Kits,"

<TABLE>
                <S>             <C>
                CERAMIC         [*]              
                                                                                
                CERDIP          [*]              
                                                                                
                CERQUAD         [*]              
                                                                                
                CPGA            [*]              
                                                                                
                PDIP            [*]
                                                                                
                PLCC            [*]                 
                                                                                
                SOIC            [*]                       
                                                                                
                QFP             [*]
                                                                                
                TSOP            [*]
                                                                                
                DIE INSPECTION  [*]
                                                                                
                RED INKED DIE   [*]
</TABLE>


      c.    In order to enable Amkor to provide the services required by this
            Agreement, Intel may loan equipment to Amkor. Amkor agrees to use
            such equipment, and any software provided therewith, solely for the
            purpose of providing the services required hereunder. Amkor agrees
            not to disclose any software to any third party and to use
            reasonable efforts to insure all its subcontractors, including Anam,
            will comply with the confidentiality provisions of this Agreement.



                                       2

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            Intel retains ownership of and title to such equipment. Amkor will
            not modify, lease, sublease, assign, or otherwise transfer or
            dispose of the equipment. Amkor will not remove, move, or relocate
            the equipment without Intel's prior consent. Amkor will make every
            effort to ensure that Intel owned equipment is provided safe storage
            and proper care at least equal to that afforded other factory-owned
            equipment.

      d.    Amkor will provide all other parts and supplies necessary for
            assembly and processing required by this Agreement.

      e.    Amkor will assemble kits and return completed Units within the
            through-put- time outlined in Exhibit A, attached hereto.

      f.    All materials furnished by Intel will be held by Amkor for the
            benefit of Intel. Ownership of such materials will remain with
            Intel. Amkor will furnish a [*] report of all Inventories of
            such materials. Intel may at any time, upon [*] notice to
            Amkor, inventory all such materials in the possession of Amkor.

      g.    Amkor will provide Intel with a [*] report of its production
            schedule, work-in-process inventory, shipments, and any and all
            engineering and quality data required for yield loss analysis.

3.    PRICE

      a.    [*]

      b.    [*]

      c.    [*]


                                       3


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                  [*]

4.    QUALITY ASSURANCE

      a.    Amkor Obligations

            Amkor will assemble all Units in accordance with Intel
            specifications. Any Units not meeting said quality specifications
            will be returned to Intel as scrap. Amkor will adhere to Intel's
            specifications with respect to piece part control, security,
            traceability, and accountability. Amkor hereby acknowledges and
            agrees it is responsible to Intel for the return of all Kits
            delivered to Amkor by Intel. Kits will be reconciled each month with
            any variances finalized within [*] following month end. Intel die
            count variances at die prep will not be considered to be a negative
            variance. The Kits returned may be either completed Units or
            rejects. Because it is difficult or impossible to assess actual
            damages, the parties agree that a liquidated damage will be
            assessed. Any Kits which Amkor cannot return to Intel as Units or
            rejects in any form for any reason whatsoever will subject Amkor to
            a liquidated damage of [*] per nonreturned Kits in excess of [*].
            The parties further agree that this sum is reasonable and is not
            assessed as a penalty. Amkor agrees that any liquidated damages may
            be offset against any monies owed to Amkor by Intel.



                                       4

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      b.    Coordination and Administration

            As partial consideration for Intel to enter into this Agreement, and
            in order to provide Intel with assurances as to Amkor's compliance
            with the quality assurance standards set forth herein, Intel will
            have the right to station [*] or more quality assurance personnel at
            Amkor's subcontractor's facilities at any time. Amkor and its
            subcontractor will provide adequate office space and reasonable
            support for the use of such personnel and will permit such personnel
            access to the Intel work areas at all times for purposes of
            administering the provisions of this Agreement in the areas of
            planning, material flow, contract administration, auditing records
            and procedures, and auditing process functions relating to the
            Units. Amkor will maintain records of the qualifications of each
            operator certified to work on Intel's Units and will make such
            records available to Intel at Intel's request. Amkor will submit an
            annual list of its subcontractor's scheduled material supplier
            audits, and will allow, at Intel's prior [*] written request, [*] or
            more Intel employees to observe the material supplier audits.


5.    WARRANTY

      Amkor warrants that the Units delivered hereunder will meet all agreed
      upon specifications and will be free from defects in workmanship for a
      period of [*] after receipt by Intel. Intel will perform an incoming Units
      inspection within [*] of receipt per Exhibit C, attached hereto. If the
      Units are rejected, the rejects will be returned to Amkor for
      verification.

      a.    Rejection Rate

            i) If, for any given shipment, the Units delivered fail to comply
               with this Warranty, then at Intel's option, Intel may reject such
               defective Units and return them to Amkor for rework. In the event
               rework is not possible, Intel may within [*] from date of
               rejection furnish to Amkor sufficient additional parts and
               materials to permit Amkor to assemble replacement Units at no
               cost to Intel, or reject the work on any or all Units and not pay
               for such work.





                                       5


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            ii)   All rework or replacement labor will be provided by Amkor at
                  no additional charge as long as the assembly specifications
                  for the products being reworked or replaced have not
                  substantially changed since the original labor was provided.

            iii)  All rework and replacement Units will be completed and
                  returned to Intel within [*] from the date of receipt by
                  Amkor.

      b.    Yields, Quality DPM and Schedule Performance

            Amkor agrees to participate in quality enhancement programs as
            directed by Intel and to make good faith efforts to meet the goals
            set forth in Exhibit D, attached hereto. Intel will establish yield,
            quality DPM, and schedule performance goals annually. If such goals
            are not met, Amkor agrees to submit a corrective action plan at
            Intel's request within [*] of request.

      c.    Warranty Limitation and Disclaimer

            This Warranty will not extend to any defect in the Kits delivered to
            Amkor, nor to any damage caused by Intel's abuse, negligence, loss
            or to any damage caused by Intel's abuse, negligence, loss or by any
            damage in transit.

      d.    AMKOR'S SPECIFIC EXPRESS WARRANTIES SET FORTH IN THIS AGREEMENT ARE
            IN LIEU OF ALL OTHER WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED 
            INCLUDING WITHOUT LIMITATION, WARRANTIES AS TO CONDITION,
            DESCRIPTION, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY OR AS
            TO ANY OTHER MATTER. AMKOR'S SOLE MONETARY OBLIGATION WILL BE
            LIMITED TO VALUE ADDED BY AMKOR AS IT RELATES TO THE ASSEMBLY OF
            UNITS. AMKOR WILL NOT BE LIABLE OR RESPONSIBLE FOR ANY CONSEQUENTIAL
            INDIRECT, INCIDENTAL, PUNITIVE, OR SPECIAL DAMAGES ARISING, DIRECTLY
            OR INDIRECTLY FROM THE ASSEMBLY, DELIVERY, SALE, INSTALLATION, OR
            USE OF UNITS DELIVERED TO INTEL UNDER THIS AGREEMENT EXCEPT THAT
            NOTHING CONTAINED HEREIN EXCLUDES AMKOR'S LIABILITY TO INTEL FOR
            GROSS NEGLIGENCE OR WILLFUL MISCONDUCT.

6.    TERMINATION

      a.    Termination for Convenience

            After the first full year of this Agreement, either party may
            terminate any extension of this Agreement 



                                       6

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<PAGE>   7
            without reason at any time by giving to the other party [*] written
            notice. [*] both parties agree to negotiate in good faith for a
            gradual elimination of services provided under this Agreement.

      b.    Termination for Cause

            In the event that Amkor fails to meet Intel's incoming rejection
            rates or yield rates as set forth in Section 5, "Warrant," or
            commits any other material breach of this Agreement, then Intel may
            give Amkor [*] written notice of intention to terminate the
            Agreement. In the event Amkor has not corrected, to Intel's
            satisfaction, such deficiencies as specified by Intel within said
            [*] period, then this Agreement will terminate automatically without
            further notice at the end of said [*] period. If Intel's notice
            specifies quality deficiencies, Amkor will discontinue Unit assembly
            at Intel's request until such quality problems are corrected.

      c.    Return of Equipment and Materials

            In the event of termination under either subsection 6.a. or 6.b.
            above, Amkor will, within [*] from date of termination, account for
            and return to Intel all equipment materials, software, and
            specifications provided to Amkor by Intel in the same working order
            as when provided to Amkor, reasonable wear and tear accepted. In the
            event Amkor does not return said equipment, materials, or software
            within [*] at Intel's option, Intel will invoice Amkor and Amkor
            will pay Intel an amount equal to Intel's net book value.

7.    PAYMENT

      Amkor will render invoices with each shipment to Intel. All such invoices
      will be paid by Intel in U.S. dollars, [*] from date of invoice.
      The invoice will be calculated based on the dollar prices set forth in
      Exhibit B. [*]


                                       7

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<PAGE>   8

8.    TRANSPORTATION AND RISK OF LOSS

      Transportation charges and insurance for all equipment. Kits and Units
      shipped from Intel to Amkor are to be paid by Intel, except for Units
      being returned under Warranty as specified in section 6 above, in which
      case Amkor will pay all transportation arrangements and prepay all
      transportation charges to return Units from Amkor to Intel. Risk of loss
      for all equipment, Kits and Units in transit will remain with Intel.

9.    CUSTOMS AND GOVERNMENT REGULATIONS

      In the event the Units are exported from the United States or reexported
      from a foreign destination by Amkor, Amkor will insure that the
      distribution and export/reexport of the Units is in compliance with all
      laws, regulations, orders, or other restrictions of the U.S. Export
      Administration Regulations. Amkor agrees that neither it nor any of its
      subsidiaries or subcontractors will export/reexport any technical data,
      process, Units or service, directly or indirectly, to any country for
      which the United States government or any agency thereof requires an
      export license or other government approval without first obtaining such
      license or approval.

10.   INDEMNITY

      a.    Amkor agrees to defend, indemnify, and hold Intel harmless from and
            against any and all liability, claims, and the associated costs and
            expenses (including attorney's fees), which it may hereafter incur
            or become responsible for as a result of death or bodily injuries to
            any person, destruction or damage to any property, caused in whole
            or in part, by any acts, errors, or omissions by Amkor, its
            subcontractor, including but limited to Anam, its employees or
            agents.


      b.    Amkor assumes no obligation or liability of any kind with respect to
            claims of infringement of United States or foreign patents,
            copyrights, trademarks or other proprietary rights arising out of or
            relating to Intel's purchase, importation, use, possession, sale or
            delivery of any product or services sold to Intel by Amkor, and
            Intel shall indemnify, defend and hold Amkor harmless from any and
            all such claims and liabilities, damages and expenses, including
            attorneys fees.



                                       8
<PAGE>   9

11.   GENERAL

      a.    Confidentiality

            All specifications, written documentation, and other proprietary
            information transferred by the providing party to the receiving
            party shall be considered the confidential Information of the
            providing party. The receiving party shall not use said Information
            for any purpose other than the performance of this Agreement and
            shall not disclose such information to any third party without the
            prior written consent of the providing party.

      b.    Assignment

            Intel may assign this Agreement or any interest herein to any Intel
            affiliated company without Amkor's consent and Amkor may only assign
            this Agreement to Anam Industrial Co., Ltd. with Intel's prior
            written consent. Otherwise, the parties hereto will not assign this
            Agreement nor any interest herein, nor any right hereunder without
            the prior written consent of the other party.

      c.    Entire Agreement

            This Agreement and the referenced exhibits set forth the entire
            Agreement of the parties with respect to the subject matter hereof,
            and supersedes all prior negotiations, correspondence and Agreements
            pertaining thereto. No modification or waiver of any provision of
            this Agreement or consent to any departure therefrom will be
            effective unless made in writing by officers of the parties hereto.

      d.    Force Majeure

            The parties hereto will not be liable for any failure to perform due
            to unforeseen circumstances or causes beyond that party's reasonable
            control. Examples of such causes are acts of God, war, riot,
            embargoes, acts of civil or military authority, fire, flood,
            accidents, or shortages of transportation facilities, fuel, labor,
            or materials which cannot be reasonably replaced from other sources.

      e.    Controlling Law

            This Agreement will be governed by, subject to, and construed
            according to the laws of the State of California, United States of
            America, excluding its Conflicts of Laws provisions.


                                       9
<PAGE>   10

      f.    Severability

            If any provision of this Agreement will be held to be invalid,
            illegal, or unenforceable, the validity, legality, and
            enforceability of the remaining provisions will not in any way be
            affected or impaired thereby.

      g.    Amkor agrees to abide by the attached Record Retention Policy of
            Intel.

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the dates indicated by their respective signatures.

AMKOR ELECTRONICS, INCORPORATED                INTEL CORPORATION


BY: /s/ illegible                              By: /s/ illegible 
  ----------------------------                    ------------------------------
TITLE: Vice President of Sales                 TITLE: General Manager
      ------------------------                        Contracting and Random 
                                                      Memory Access Division
                                                     ---------------------------
DATE: August 14, 1991                          DATE: August 6, 1991
     -------------------------                      ----------------------------


                                       10
<PAGE>   11

                                    Exhibit A


1991 Throughout Time Goal

        [*]




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                             EXHIBIT B (Page 1 of 3)

                               Pricing Settlement

                         ***Pricing Effective 4/1/91***

<TABLE>
<CAPTION>
        PACKAGE
-------------------------
<S>                                     <C>
PDIP                                    [*]  

HS

PLCC

OFP

PQPP

SOOP

DRAM


</TABLE>


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                             EXHIBIT B (Page 2 of 3)

                               Pricing Settlement

                         ***Pricing Effective 4/1/91***

<TABLE>
<CAPTION>
                                    
              PACKAGE               
     ------------------------------ 
     <S>               <C>   <C>       
     PLATE  

     PGA                [*]

     CC

     CR 

     CRQ

     CQ
     CL

     CER-
     QUAD

     CER-
     DIP 

     DIE    
     INSPEC-
     TION   

     RED       
    INKED  
     DIE   
                                  
     DOUBLE
     SAW                                                                                 

     SHIP-                                                 
     PING  
     TRAYS 

    SHIP-                                                                       
    PING           
    TUBES          

</TABLE>


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<PAGE>   14

                             EXHIBIT B (PAGE 3 OF 3)

                         ***Pricing Effective 4/1/91***

LOT CHARGES

1.       Qualification lots are provided at a cost of [*] per lot, plus the Unit
         price multiplied by the total number of Units. Qualification lots
         include full documentation with summary report.

2.       Engineering/small lots are provided at a cost of [*] per lot, plus the
         Unit price multiplied by the total number of Units.

3.       Mechanical samples are provided at a cost of [*] the Unit price.
         Minimum lot charge is [*].

4.       Fast Track lots are provided at a cost of [*] the Unit price plus a
         processing lot charge of [*]. Fast Track assembly requests must be made
         of and acknowledged by the factory.



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<PAGE>   15



                                    EXHIBIT C

                          INCOMING TESTING BY CUSTOMER

<TABLE>
<CAPTION>
                                         SAMPLE
   TEST                SPEC              SIZE      CERDIP  PLASTIC
   ----                ----              ----      ------  -------
<S>                    <C>               <C>       <C>     <C>     
Package Visual         20-500            100         X        X
Fine/Gross Leak        20-044            100         X
Centrifuge             15-504            112         X
PIND Test             25-310A            100         X
Open/Short             15-528            100         X        X
X-ray                  15-577             20                  X

</TABLE>


<TABLE>
<CAPTION>
                                         SAMPLE
   TEST                SPEC              SIZE      CERDIP  PLASTIC
   ----                ----              ----      ------  -------
<S>                    <C>               <C>       <C>     <C>     
85/85                 25-308              55                  X
Stream Test           25-355              55                  X
Temp Cycle            15-518              55                  X
Solderability         15-335              30         X
Thermal Shock         25-334             100         X
Torque Test           25-350              50         X
Centrifuge            15-504             130         X

</TABLE>

Specifications and requirements for incoming package quality and reliability
monitors are more fully described in Intel's Specification Reference Number
HK-S010-0.



<PAGE>   16

                                    EXHIBIT D

                                  QUALITY GOALS

1991 YIELD (- OPT) GOALS
---------------------------
IWS 20-500 Revision 9

<TABLE>
<CAPTION>

                                           (%)


PACKAGE TYPE         QI `91    Q2 `91     Q3 `91   Q4 `91
------------         ------    ------     ------   ------
<S>                   <C>       <C>        <C>      <C> 

[*]

</TABLE>


1991 INCOMING QUALITY GOALS
---------------------------
Intel Source Q.A.

<TABLE>
<CAPTION>
                                     (DPM)

PACKAGE TYPE         QI `91    Q2 `91     Q3 `91   Q4 `91
------------         ------    ------     ------   ------
<S>                   <C>       <C>        <C>      <C> 

[*]

</TABLE>


1991 Schedule Performance Goal

     LIPAS (Line Item Performance Against Schedule): [*]

     VOLPAS (Total Volume Performance Against Schedule): [*]

* = GREATER THAN SYMBOL


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