Input protection circuit preventing electrostatic discharge damage of semiconductor integrated circuit
AssigneeKabushiki Kaisha Toshiba
InventorShuuji Matsumoto
Life of this patent
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Abstract
An input protection circuit comprises a semiconductor chip, an internal circuit disposed on the semiconductor chip, a first input/output terminal which is disposed on the semiconductor chip and connected to the internal circuit, a second input/output terminal which is disposed on the semiconductor chip, connected to the internal circuit and disposed at a position adjacent to the first input/output terminal, and a fusing part which is disposed on the semiconductor chip and connected between the first and second input/output terminals.
Claims7
An intermediate product for a semiconductor integrated circuit having an input protection circuit, before being mounted on a circuit board, the input protection circuit comprising:
- a semiconductor chip;
- an internal circuit disposed on the semiconductor chip:
- a plurality of input/output terminals linearly arranged on the semiconductor chip and connected respectively to the internal circuit;
- and
- a plurality of fusing parts disposed on the semiconductor chip and disposed alternately between input/output terminals adjacent to each other among the plurality of input/output terminals so as to connect serially the plurality of input/output terminals, forming a current path by an arrangement of the plurality of input/output terminals and the plurality of fusing parts,
- wherein the plurality of fusing parts are respectively configured to be blown out so that the plurality of input/output terminals are electrically separated respectively from each other after the intermediate product is mounted on the circuit board.
An input protection circuit comprising:
- a semiconductor chip;
- an internal circuit disposed on the semiconductor chip:
- a plurality of input/output terminals which are disposed on the semiconductor chip and connected to the internal circuit;
- and
- a plurality of fusing parts which are disposed on the semiconductor chip and disposed between input/output terminals adjacent to each other among the plurality of input/output terminals,
- wherein each of the fusing parts includes a first fuse, an antifuse and a second fuse, which are serially connected between input/output terminals adjacent to each other among the plurality of input/output terminals.
Dependencies are inferred from the claim text.