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Wire bonding is a method of making interconnections between an integrated circuit (IC) or other semiconductor device and its packaging during semiconductor device fabrication. Wire bonding can also be used to connect an IC to other electronics or to connect from one printed circuit board (PCB) to another, although these are less common. Wire ...
These techniques are usually used when the die will be wire bonded; dies with flip chip technology do not use these attachment techniques. [15] [16] IC bonding is also known as die bonding, die attach, and die mount. [17] The following operations are performed at the packaging stage, as broken down into bonding, encapsulation, and wafer bonding ...
The die is glued or soldered to the die pad inside the lead frame, and then bond wires are attached between the die and the bond pads to connect the die to the leads in a process called wire bonding. In a process called encapsulation, a plastic case is moulded around the lead frame and die, exposing only the leads.
Drawing of a tape-automated bonding carrier and definitions of various parts of the TAB assembly. Tape-automated bonding (TAB) is a process that places bare semiconductor chips (dies) like integrated circuits onto a flexible circuit board (FPC) by attaching them to fine conductors in a polyamide or polyimide (like trade names Kapton or UPILEX) film carrier.
To attach the flip chip into a circuit, the chip is inverted to bring the solder dots down onto connectors or pads on the underlying electronics or circuit board or substrate. The solder is then re-melted to produce an electrical connection, typically using a thermosonic bonding or alternatively reflow solder process.
A die, in the context of integrated circuits, is a small block of semiconducting material on which a given functional circuit is fabricated. Typically, integrated circuits are produced in large batches on a single wafer of electronic-grade silicon (EGS) or other semiconductor (such as GaAs ) through processes such as photolithography .
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In "wire bonding", the chip is attached to the board with an adhesive. Each pad on the device is connected with a fine wire lead that is welded to the pad and to the circuit board. This is similar to the way that an integrated circuit is connected to its lead frame, but instead the chip is wire-bonded directly to the circuit board. [3]
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