Patent ID: 6847104

Claim:
A window-type ball grid array (WBGA) semiconductor package with a lead frame as a chip carrier, comprising: a lead frame having a plurality of leads that encompass an opening penetrating through the lead frame, wherein each of the leads has a terminal toward the opening, an upper surface, and a lower surface opposed to the upper surface and defined with a wire-bonding portion and a ball-implanting portion thereon; a first resin material pre-molded on the lower surfaces and terminals of the leads, allowing the wire-bonding portions and ball-implanting portions to be exposed to outside of the first resin material; at least a chip having an active surface and a non-active surface opposed to the active surface, wherein the active surface is mounted on the upper surfaces of the leads and covers the opening of the lead frame, allowing a plurality of bond pads formed on the active surface to be exposed to the opening; a plurality of bonding wires for electrically connecting the bond pads of the chip to the wire-bonding portions of the leads via the opening of the lead frame; an encapsulant formed on the lead frame, the encapsulant having a first portion and a second portion, wherein the first portion is formed on the upper surfaces of the leads for encapsulating the chip, and the second portion of the encapsulant fills into the opening for encapsulating the bonding wires, wherein an exposed bottom surface of the second portion is flush with an exposed surface of the first resin material; and a plurality of solder balls implanted at the ball-implanting portions of the leads.