1 EXHIBIT 4.1 REGISTRATION RIGHTS AGREEMENT This Registration Rights Agreement ("AGREEMENT") is made as of May 27, 1999 by and among American Xtal Technology, Inc., a Delaware corporation ("AXT"), Lyte Optronics, Inc., a Nevada corporation ("LYTE...Registration Rights Agreement • April 14th, 2000 • American Xtal Technology • Semiconductors & related devices • Nevada
