Patent ID: 6080598
Filing Date: 2000-06-27
Classification: H01S

Abstract:
A method of producing a semiconductor laser element comprising a laser resonator with opposite end faces as mirror facets, said laser resonator having an layered structure of semiconductor materials including an active layer and upper and lower layers of said active layer, said resonator having first and second contact electrodes formed on top and bottom thereof, said method comprising steps of:preparing a wafer having said layered structure;forming the first and second contact electrodes onto the top and the bottom of the wafer to supply an electrode added wafer;introducing said electrode added wafer into a ultra high vacuum chamber;cleaving said electrode added wafer along a predetermined lines in said ultra high vacuum chamber to produce a laser bar with opposite end faces as cleaved;covering said end faces with protective layers during maintaining said laser bar in said ultra high vacuum chamber before said end face is oxidized, to supply a protected laser bar, each of said protective layers being an amorphous layer of a compound semiconductor material between a third group element and a fifth group element in the element periodic table.