["Process of the research and development received Nobel Prize in Chemistry 2002"].
Mr. K. Tanaka engaged in Shimadzu Corporation received the Nobel Prize in Chemistry 2002 for the development of soft laser desorption ionization method for mass spectrometric analyses of biological macromolecules. In this paper, the process of the research and development of desorption ionization method and the produced laser desorption ionization time of flight mass spectrometer (LDI-TOFMS) are described.