Patent ID: 7199438

Claim:
An optical semiconductor package, comprising: a substrate having opposite upper and lower surfaces; a chip disposed on the upper surface of said substrate and having an optical element on an upper surface of said chip; a plurality of bonding pads disposed on the upper surface of said substrate; a plurality of bonding wires electrically connecting the chip to the bonding pads; a transparent adhesive layer; a window made of a transparent material mounted on the optical sensor of the chip by said transparent adhesive layer which is disposed between said window and said optical sensor for allowing light to transmit through the window and interact with the optical sensor; and an encapsulant formed on the substrate for fixing the window and encapsulating the chip and the bonding wires; wherein said window has opposite upper and lower surfaces and a side surface connecting the upper and lower surfaces of said window; said transparent adhesive layer directly, physically contacts both the lower surface of said window and an upper surface of said optical sensor of said chip and attaches the lower surface of said window and the upper surface of said optical sensor together; and said encapsulant surrounds said window and directly, physically contacts the side surface of said window, while leaving the upper surface of said window exposed from an upper surface of said encapsulant wherein said encapsulant and said adhesive layer are made of different materials.