Semiconductor light-emitting device and method for producing the same

A semiconductor light-emitting device, comprising:

• a semiconductor light-emitting element;
• a first metal member including a first metal plate and a first metal layer between the semiconductor light-emitting element and a first surface of the first metal plate;
• an insulating layer comprising silicon oxide contacting a second surface of the first metal plate;
• and
• a second metal member including a second metal plate and a second metal layer on at least a portion of a surface of the second metal plate,
• wherein the first metal plate comprises copper, the first metal layer comprises silver, the second surface is in a second plane that crosses a first plane of the first surface, and the surface of the second metal plate is substantially parallel to the first plane,
• wherein
• the first metal layer has a first metal layer side face intersecting the first plane,
• the insulating layer is in contact with the first metal layer side face,
• the second metal plate comprises copper,
• the second metal layer comprises silver,
• the second metal member is adjacent to the first metal member in a direction intersecting the second plane,
• the second metal plate has a second metal plate side face in a plane intersecting the first plane, and
• the insulating layer is in contact with the second metal plate side face.