Patent ID: 6545332
Filing Date: 2003-04-08
Classification: H01L

Abstract:
An image sensor of a quad flat non-leaded package (QFN), comprising:a lead frame having a plurality of leads and a die pad, wherein the leads are located around a periphery of the die pad, and the lead frame has a first surface and a corresponding second surface, each lead having a bonding portion; a molding structure formed around an outer boundary of the leads and located on the first surface of the lead frame, wherein gaps between the die pad and the leads are covered by the molding structure, a first surface of the die pad and the bonding portions of the leads are exposed, wherein the molding structure and the lead frame are arranged in such a way that a space is formed; a chip having an active surface and a corresponding back surface, wherein a plurality of bonding pads is formed on the active surface, and the chip is located in the space and the back surface of the chip is adhered onto the first surface of the die pad; a plurality of wires utilized to electrically connect the bonding pads respectively to the bonding portions of the leads on the first surface of the lead frame; a liquid compound filled in between the chip and the molding structure and covering portions of the wires, wherein a surface of the liquid compound is approximately coplanar to the active surface of the chip; and a transmittance lid allocated over the active surface and sealing the space between the molding structure and the lead frame.