摘要:
A semiconductor device having copper interconnecting metallization (111) protected by a first (102) and a second (120) overcoat layer (homogeneous silicon dioxide), portions of the metallization exposed in a window (103) opened through the thicknesses of the first and second overcoat layers. A patterned conductive barrier layer (130) is positioned on the exposed portion of the copper metallization and on portions of the second overcoat layer surrounding the window. A bondable metal layer (150) is positioned on the barrier layer; the thickness of this bondable layer is suitable for wire bonding. A third overcoat layer (160) consist of a homogeneous silicon nitride compound is positioned on the second overcoat layer so that the ledge (162, more than 500 nm high) of the third overcoat layer overlays the edge (150b) of the bondable metal layer. The resulting contoured chip surface improves the adhesion to plastic device encapsulation.
摘要:
A method for forming solder connections using dummy vias and the device. The dummy vias are formed prior to the application of ball limiting metals or solder material. After placing the under ball materials and the solder materials, the material covering the dummy vias has an increased surface contact and thus provide improved robustness and lifetime of the solder connection. Structures of implementation of the method are provided with either completely or partially filled dummy vias.
摘要:
A system and method is disclosed for increasing the strength of a bond made by a small diameter wire in ball bonding. In one embodiment of the invention a structure for receiving a ball bond comprises substrate material that has portions that form a substrate cavity and a wire bond pad that covers and fills the substrate cavity. The wire bond pad also has portions that form a wire bond cavity for receiving the ball bond. The ball is wirebonded to the sides and bottom of the wire bond cavity. The sides of the wire bond cavity provide additional strength to the bond to resist shear and tensile forces that may act on the wire.
摘要:
The present invention relates to a structure of bumps forming on an under bump metallurgy layer (UBM layer) and a method for making the same. The structure comprises a wafer, a UBM layer, a second photo resist and a bump. The wafer has a plurality of solder pads and a protection layer, and the protection layer covers the surface of the wafer and exposes parts of the solder pads. The UBM layer is disposed on the solder pads and the protection layer and has an undercut structure. The second photo resist is disposed in the undercut structure. The bump is disposed on the UMB layer. Whereby, the UMB layer will not be reacted with bump in a reflow process and the problem of stress concentration will be avoided so as to make the bump more stable.
摘要:
A chip structure including a chip, a passivation layer, an elastic layer and a metal layer is provided, with a bump disposed on the metal layer for electrically connecting a bonding pad of the chip. The passivation layer and the elastic layer are covering an active surface of the chip, and have an opening respectively for exposing top surface of the bonding pad, wherein the elastic layer is utilized to make the bump being heat-pressed onto a contact of a substrate with an enhanced electrical performance, and the elastic layer is made of for example polyimide or other macromolecule polymer. Moreover, the chip structure further includes a plurality of elastic granular structures at the bottom of the bump to enhance the bonding reliability of the bump.
摘要:
A metal structure for a contact pad of an integrated circuit (IC), which has copper interconnecting metallization (311). A portion (301) of this metallization is exposed to provide a contact pad to the IC. A conductive barrier layer (330) is positioned on the exposed portion of the copper metallization. A plug (350) of bondable metal, preferably aluminum between about 0.4 and 1.4 μm thick, is positioned on the barrier layer. A protective overcoat layer (320) surrounds the plug and has a thickness (320b) so that the exposed surface (322) of the plug lies at or below the exposed surface (320a) of the overcoat layer. Optionally, a portion (321) of the overcoat layer between about 0.1 and 0.3 μm wide may overlap the perimeter of the plug.
摘要:
A semiconductor device comprising: a semiconductor element (10) having a plurality of electrodes (12); an interconnect pattern (20) electrically connected to the electrodes (12); a plurality of laminated insulating layers (41, 42 and 43); and a plurality of external terminals (30) electrically connected to the interconnect pattern (20). A plurality of holes (44, 46, and 48) are respectively formed in the insulating layers (41, 42, and 43) to form an opening portion (40) communicating from the hole (48) in the highest insulating layer (43) to the hole (44) in the lowest insulating layer (41). An external terminal (30) is provided within the opening portion (40), and the second hole (46) formed in the higher positioned second insulating layer (42) is larger than the first hole (44) formed in the lower positioned first insulating layer (41).
摘要:
A semiconductor device is provided comprising: a semiconductor element including a plurality of electrodes; first wirings coupled to the electrodes and directed toward a center of the semiconductor element from a portion coupled to the electrodes; second wirings coupled between the first wirings and external terminals, the second wirings being directed to an outer area of the semiconductor element relative to the center; and at least one resin layer formed between the first wirings and the second wirings.
摘要:
A method of forming a device, comprising the following steps. A wafer holder and inner walls of a chamber are coated with a seasoning layer The wafer is placed upon the wafer holder and is cleaned wherein a portion of the seasoning layer is re-deposited upon the wafer over and between adjacent wafer conductive structures. The wafer is removed from the chamber and at least two adjacent upper metal structures are formed over at least one portion of a metal barrier layer. The exposed portions of the metal barrier layer are etched and removed, exposing portions of the re-deposited seasoning layer portions using the metal barrier layer etch process which also removes any exposed portions of the re-deposited seasoning layer portions that are comprised of a material etchable in the metal barrier layer etch process.
摘要:
There is provided a structure in which a phosphorus-nickel layer, a rich phosphorus nickel layer that contains phosphorus or boron higher than this phosphorus-nickel layer, a nickel-tin ally layer, a tin-rich tin alloy layer, and a tin alloy solder layer are formed in sequence on an electrode. Accordingly, adhesiveness between a metal pattern used as the electrode, the wiring, or the pad and the solder can be improved.