Exhibit 99.1

      CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
                                   PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002



      I, James J. Kim, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly
Report of Amkor Technology, Inc. on Form 10-Q for the quarterly period ended
September 30, 2002 fully complies with the requirements of Section 13(a) or
15(d) of the Securities Exchange Act of 1934 and that information contained in
such Form 10-Q fairly presents in all material respects the financial condition
and results of operations of Amkor Technology, Inc.

                                          By: /s/ JAMES J. KIM
                                              _________________________
                                          Name:   James J. Kim
                                          Title:  Chief Executive Officer

      I, Kenneth T. Joyce, certify, pursuant to 18 U.S.C. Section 1350, as
adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the
Quarterly Report of Amkor Technology, Inc. on Form 10-Q for the quarterly period
ended September 30, 2002 fully complies with the requirements of Section 13(a)
or 15(d) of the Securities Exchange Act of 1934 and that information contained
in such Form 10-Q fairly presents in all material respects the financial
condition and results of operations of Amkor Technology, Inc.

                                          By: /s/ KENNETH T. JOYCE
                                              _________________________
                                          Name:   Kenneth T. Joyce
                                          Title:  Chief Financial Officer