| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a light emitting device, with which discoloration of a lead frame can be prevented, in the method of manufacturing the light emitting device using silicone resin as a sealant for a light emitting element. <P>SOLUTION: The method of manufacturing the light emitting device which includes the light emitting element fixed to the lead frame and a silicone sealing part for sealing the light emitting element with the silicone resin, and where at least the surface of the lead frame on the side of the light emitting element is principally made of Ag, Cu or Al, includes the steps of: preparing the silicone resin; measuring an average spin-spin relaxation time of<SP>1</SP>H nuclei of the silicone resin by a pulse NMR method; evaluating whether the average spin-spin relaxation time of<SP>1</SP>H nuclei of the silicone resin is 100 microseconds or shorter at 25°C and at a resonance frequency of 25 MHz; selecting the silicone resin on the basis of the evaluation result; and forming the silicone sealing part by sealing the light emitting device with the selected silicone resin. <P>COPYRIGHT: (C)2010,JPO&INPIT |
