EX-15 3 a2125078zex-15.txt EXHIBIT 15 EXHIBIT 15 JOINT FILING AGREEMENT This will confirm the agreement by and among all of the undersigned that this Amendment No. 3 to Schedule 13D on or about this date with respect to the beneficial ownership by the undersigned of ChipPAC, Inc. is being, and any and all amendments to such Schedule may be, filed on behalf of each of the undersigned. This Agreement may be executed in two or more counterparts, each of which will be deemed an original, but all of which together shall constitute one and the same instrument. Dated: December 16, 2003 CITICORP MEZZANINE III, L.P. By: Citicorp Capital Investors Limited, its General Partner By: /s/ Byron L. Knief --------------------------------------- Name: Byron L. Knief Title: President CITICORP CAPITAL INVESTORS, LIMITED By: /s/ Byron L. Knief --------------------------------------- Name: Byron L. Knief Title: President CITICORP VENTURE CAPITAL LTD. By: /s/ Byron L. Knief --------------------------------------- Name: Byron L. Knief Title: Vice President CITIBANK, N.A. By: /s/ Serena D. Moe --------------------------------------- Name: Serena D. Moe Title: Assistant Secretary CITICORP By: /s/ Serena D. Moe --------------------------------------- Name: Serena D. Moe Its: Assistant Secretary CITIGROUP HOLDINGS COMPANY By: /s/ Serena D. Moe --------------------------------------- Name: Serena D. Moe Its: Assistant Secretary CITIGROUP INC. By: /s/ Serena D. Moe --------------------------------------- Name: Serena D. Moe Its: Assistant Secretary