EXHIBIT 10.4 SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated as of January 5, 2005, among Amkor International Holdings, LLC, a Delaware limited liability company ("AIH"), P-Four, LLC, a Delaware limited liability company ("P-Four"),...Supplemental Indenture • January 10th, 2005 • Amkor Technology Inc • Semiconductors & related devices • New York
