Semiconductor chip package having an adhesive tape attached on bonding wires
The invention provides a semiconductor chip package, and a means of forming such a semiconductor chip package, in which one or more semiconductor chips are electrically connected to a mounting substrate by wire bonding in which an adhesive tape is provided on the active surface of the semiconductor chips for encapsulating at least an upper portion of the bonding wires adjacent the active surfaces to improve the stability of the bonding wires during subsequent processing.
1. A semiconductor chip package comprising:
a first semiconductor chip having a first surface and an active surface opposite the first surface;
chip pads arrayed within a perimeter of the active surface;
a mounting substrate having a mounting region to which the first surface of the semiconductor chip is affixed and a plurality of mount pads arrayed on the mounting substrate;
first plurality of bonding wires providing electrical connection between chip pads and mount pads, upper portions of the first plurality of bonding wires extending from the chip pads and above and across a peripheral region of the active surface; and
a first adhesive tape attached directly to the active surface of the first semiconductor chip and substantially encapsulating the upper portions of the first plurality of bonding wires; wherein
the first adhesive tape extends beyond a portion of the perimeter of the active surface of the first semiconductor chip.
2. The semiconductor chip package according to claim 1 , further comprising:
a polymeric composition substantially encapsulating the first semiconductor chip, the first plurality of bonding wires and the first adhesive tape.
3. The semiconductor chip package according to claim 1 , wherein
the mounting substrate is selected from a group consisting of printed circuit boards, lead frames and tape type circuit boards.
4. The semiconductor chip package according to claim 1 , wherein
the first adhesive tape extends beyond the entire perimeter of the active surface of the first semiconductor chip.
5. The semiconductor chip package according to claim 1 , wherein
the first adhesive tape has a thickness of between about 5 μm to 200 μm.
6. The semiconductor chip package according to claim 1 , wherein
the first adhesive tape includes a major portion of a thermosetting or thermoplastic synthetic resin material.
7. The semiconductor chip package according to claim 6 , wherein
the synthetic resin material includes a major portion of at least one material selected from a group of resins consisting of polyimide, epoxy and acryl resins.
8. A semiconductor chip package comprising:
a first semiconductor chip having a first surface and an active surface opposite the first surface;
chip pads arrayed within a perimeter of the active surface;
a substrate having a mounting region to which the first surface of the semiconductor chip is affixed and a plurality of mount pads arrayed on the mounting substrate;
first plurality of bonding wires extending from the chip pads and above and across a peripheral region of the active surface; and
a first adhesive tape; wherein the semiconductor chip package is produced by
attaching the first semiconductor chip having a first surface and an active surface opposite the first surface on a mounting substrate;
attaching the first plurality of bonding wires between chip pads arrayed within a perimeter of the active surface of the first semiconductor chip and mount pads arrayed on the mounting substrate, the first plurality of bonding wires establishing electrical connections between the first semiconductor chip and the mounting substrate;
attaching the first adhesive tape directly to the active surface of the first semiconductor chip and to upper portions of the first plurality of bonding wires; and
encapsulating the upper portions of the bonding wires within portions of the first adhesive tape wherein
the first adhesive tape extends beyond a portion of the perimeter of the active surface of the first semiconductor chip.
9. The semiconductor package according to claim 8 , further comprising,
heating the first adhesive tape to a temperature sufficient to cause the portions of the first adhesive tape to encapsulate the upper portions of the bonding wires.