The polyurethane core has a first major surface and a second major surface opposite the first major surface.

The first major surface opposes the second major surface.

A module has an inner major surface and an outer major surface.

A gasket material may comprise a polymer sheet comprising a first major surface and a second major surface, the second major surface opposing the first major surface.

The first substrate has a first major surface and a second major surface.

The face ply includes a first major surface and a second major surface.

Each flexible layer has a first major surface and a second major surface.

The pressure-sensitive adhesive sheet has a first principal surface and a second principal surface opposite the first principal surface.

The die (20) has a lower major surface over the upper plane, an upper major surface, and a plurality of side edge surfaces (26) from the upper major surface to the lower major surface.

The substrate has a first major surface opposite a second major surface, and the film covers a portion of the first major surface.

The carrier has a second main surface (210) and a third main surface (220).

A device layer has a first main surface and a second main surface.

Both the second main surface and the fourth main surface are mirror finished.

  The film (20) comprises a first main surface (20a) and a second main surface (20b) which is the opposite side from the first main surface.

The second light guide has a third main surface, fourth main surface, and second end surface.