Patent ID: 7122874

Claim:
A photo-sensing device package comprising: (a) a substrate formed of a material substantially transparent to light within a predetermined range of wavelengths, said substrate having a patterned metal layer extending on a front surface thereof, and at least one passivation layer formed over said patterned metal layer, said at least one passivation layer being patterned to form a first and a second spaced apart flow trapping retention structures; (b) at least one photo-sensing die having at least one photo-sensing area defined on a front side thereof, said photo-sensing die being mounted to said substrate by a plurality of interconnection joints disposed about said photo-sensing area, whereby said front side of said photo-sensing die is spaced by a gap from said front surface of said substrate; and, (c) a sealing structure disposed about said interconnection joints to fill portions of the gap thereabout, said sealing structure including a sealing layer contiguously enclosing an internal cavity in substantially sealed manner between said photo-sensing die and substrate, said internal cavity communicating with said photo-sensing area of said photo-sensing die, said sealing layer passing between said first and second flow trapping retention structures bilaterally disposed thereabout and trapping said sealing layer therebetween.