Semiconductor integrated circuit device and methods for producti

Details Semiconductor integrated circuit device and methods for producti Semiconductor integrated circuit device and methods for producti

1994-11-01

1996-05-21

Nelms, David C.

Static information storage and retrieval

Read/write circuit

Bad bit

3652257, 365177, G11C 700

Patent

active

055196586

ABSTRACT:
Disclosed are a semiconductor integrated circuit device and methods for production thereof. An embodiment of the invention is a semiconductor chip that comprises fuses constituting part of redundancy circuits formed therein, the fuses being made of the same ingredients CCB bump substrate metal. The fuses are patterned simultaneously during the patterning of the CCB bump substrate metal. This involves forming the fuses using at least part of the ingredients of an electrode conductor pattern in the chip. The cutting regions of the fuses are made of only one of the metal layers constituting the substrate. The principal plane of the semiconductor chip has a fuse protective film formed over at least the cutting regions of the fuses for protection of the latter. In operation, a switch MOSFET under switching control of a redundancy signal is used to select one of two transmission paths, one carrying an address signal or a decode signal, the other carrying a reference voltage. This allows a faulty circuit to be replaced with the corresponding redundancy circuit.

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