Semiconductor storage device including electrical fuse module

A semiconductor storage device comprising an electrical fuse module,

• the electrical fuse module comprising electrical fuse blocks of a plurality of stages each including a plurality of electrical fuse cores in each of which programming can be performed by passing current through a fuse element and melting the fuse element,
• the electrical fuse core including a switch which is driven by input of a program enable signal for enabling the programming and a data signal for the programming and passes current through the fuse element to perform programming,
• the electrical fuse block including:
• a program shift register block made up of shift registers which are disposed for the respective electrical fuse cores, sequentially transmit the program enable signal, and output the program enable signal to the switches of the electrical fuse cores,
• wherein when programming is performed in the shift registers of the program shift register block according to a programming decision signal for determining whether or not programming is necessary for the electrical fuse core, the program enable signal is outputted to the switch of the electrical fuse core to perform programming and transmitted to the shift register of a subsequent stage, and the program enable signal is transmitted, when not performing programming, to the shift registers of the subsequent and later stages.

A semiconductor storage device comprising an electrical fuse module,

• the electrical fuse module comprising electrical fuse blocks of a plurality of stages each including a plurality of electrical fuse cores in each of which programming can be performed by passing current through a fuse element and melting the fuse element,
• the electrical fuse core including a switch which is driven by input of a program enable signal for enabling the programming and a data signal for the programming and passes current through the fuse element to perform programming,
• the electrical fuse block including:
• a program shift register block made up of shift registers which are disposed for the respective electrical fuse cores, sequentially transmit the program enable signal, and output the program enable signal to the switches of the electrical fuse cores,
• a data shift register block made up of shift registers of stages as many as the electrical fuse cores, the shift registers being disposed for the respective electrical fuse cores, sequentially transmitting a data signal for the programming, and outputting the data signal to the switches of the electrical fuse cores, and
• a transmission circuit which sequentially transmits, when performing programming according to a programming decision signal, the program enable signal to the shift registers in the program shift register block, outputs the program enable signal to the switches of the electrical fuse cores to perform programming, and transmits the program enable signal to the electrical fuse block of a subsequent stage, the transmission circuit causing, when not performing programming, the program enable signal to skip the shift registers in the program shift register block and transmitting the program enable signal to the electrical fuse blocks of the subsequent and later stages,
• wherein the data signal inputted to the data shift register block includes decision data for deciding whether or not programming is necessary or includes data equivalent to the decision data, and the decision data or the data equivalent to the decision data is used as a programming decision signal for determining whether or not programming is necessary for the electrical fuse core.