Patent ID: 7994524
Filing Date: 2011-08-09
Classification: H01L

Abstract:
1. A hermetically sealed LED semiconductor structure comprising: a) a first LED layer on a first substrate, said first LED layer having a front surface and a back surface, said first substrate having multiple through substrate first vias, said through substrate first vias connecting said first LED layer to said back surface of said first substrate; b) a second LED layer on a second substrate, said second LED layer having a front surface and a back surface, said second substrate having multiple through substrate second vias, said through substrate second vias connecting said second LED layer to said back surface of said second substrate, said second LED layer being of a different type of semiconductor material than said first LED layer; c) a plurality of metal posts attached to said front surfaces, said first LED layer attached to said second LED layer by said metal posts; d) a continuous metal wall attached to said front surfaces, said metal wall surrounding said first and second LED layers and said metal posts and forming a hermetic seal around said structure; e) a coating of metal on said back surfaces; and f) a phosphor coating on one of said back surfaces.