Patent ID: 8378379
Filing Date: 2013-02-19
Classification: H01L,Y10T

Abstract:
1. A substrate for mounting a light-emitting element, which comprises a substrate main body having a mounting surface on which a light-emitting element can be mounted, a reflection layer formed on a part of the mounting surface of the substrate main body and comprising silver to reflect light emitted from the light-emitting element when mounted, and a vitreous insulating layer formed on the reflection layer, wherein the vitreous insulating layer comprises a glass comprising SiO 2 , at least one of Al 2 O 3 and B 2 O 3 , and at least one member selected from Li 2 O, Na 2 O and K 2 O, wherein (Li 2 O+Na 2 O+K 2 O)—Al 2 O 3 is from −20 to 1.5% and SiO 2 +(3×Al 2 O 3 ) is at most 90% calculated using the mol % of each of said SiO 2 , Al 2 O 3 B 2 O 3 , Li 2 O, Na 2 O and K 2 O in said glass.