EXHIBIT 1.2 $70,000,000 AGGREGATE PRINCIPAL AMOUNT KOMAG, INCORPORATED __% CONVERTIBLE SUBORDINATED NOTES DUE 2024 UNDERWRITING AGREEMENT January __, 2004 BEAR, STEARNS & CO. INC. Piper Jaffray & Co. Needham & Company, Inc. Thomas Weisel Partners LLC...Underwriting Agreement • January 20th, 2004 • Komag Inc /De/ • Magnetic & optical recording media • New York
