th of the reflector are decreased. [0026] In one embodiment of the present invention, the resin is an epoxy resin whose glass-transition temperature is 40??? C. or more and 100??? C. or less. [0027] According to the above embodiment, good temperature cycling resistance and reflow resistance is obtained since the resin is an epoxy resin whose glass-transition temperature is 40??? C. or more and 100