Semiconductor integrated circuit device
AssigneeCanon Kabushiki Kaisha
InventorMasanobu Oomura
Life of this patent
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Abstract
A semiconductor integrated circuit device comprises: a circuit block formed on a semiconductor substrate; an electrically conductive pattern formed over a portion to be protected of the block; a resetting unit configured to reset a potential of a portion of the pattern to a reference potential; a connecting unit configured to connect the portion to a current supply line; and a detection circuit configured to determine whether a preset range includes a voltage of the portion when a predetermined time has elapsed since the portion is connected to the current supply line after the potential of the portion is reset to the reference potential is provided. A change in voltage of the portion depends on a circuit constant of the pattern.
Claims8
A semiconductor integrated circuit device comprising:
- a circuit block formed on a semiconductor substrate;
- an electrically conductive pattern formed over a portion to be protected of the circuit block;
- a resetting unit configured to reset a potential of a first portion of the electrically conductive pattern to a reference potential;
- a connecting unit configured to connect the first portion to a current supply line;
- and
- a detection circuit configured to determine whether a preset range includes a voltage of the first portion when a predetermined time has elapsed since the first portion is connected to the current supply line after the potential of the first portion is reset to the reference potential,
- wherein a change in voltage of the first portion depends on a circuit constant of the electrically conductive pattern.
Dependencies are inferred from the claim text.