Solid state image pick-up device and image pick-up system
A solid state image pick-up device has shields for suppressing deterioration in a ratio of an output signal to output noises caused by crosstalks, suppressing deterioration in a ratio of the output signal to output noises caused by a coupling capacity, and suppressing deterioration in a ratio of the output signal to output noises caused by imbalance is provided. Shielding lines 301, 302 , and 303 are arranged in a layer to which output lines 210 and 220 belong. Shielding lines 304, 305 , and 306 are arranged over the shielding lines 301, 302 , and 303 , respectively. Further, shielding pins 307, 308 , and 309 are arranged between the shielding lines 301 and 304 , between the shielding lines 302 and 305 , and between the shielding lines 303 and 306 , respectively. No shielding line is arranged over output lines 210 and 220 . A structure is made to be plane-symmetrical with respect to a plane including a center line of the shielding line 301 and a plane including a center line of the shielding line 304.
1. A solid state image pick-up device comprising:
an array having a plurality of lines on which a plurality of photoelectric converting elements are arranged;
a first output line for capacitively holding and then transmitting a first signal from a plurality of photoelectric converting elements belonging to a selected line;
a second output line for capacitively holding and then transmitting a second signal from said plurality of photoelectric converting elements belonging to said selected line; and
a differential circuit for receiving said first signal from said first output line, receiving said second signal from said second output line, and outputting a difference between said first signal and said second signal,
wherein said first output line and said second output line are arranged on a first layer, and shields for suppressing crosstalk between said first output line and said second output line are arranged in a plurality of layers including said first layer and a second layer on which said first and second output lines are not arranged, and
wherein, in at least one layer different from said first layer, said shields are arranged in positions excluding a position where said first output line vertically projects and a position where said second output line vertically projects.
2. A device according to claim 1 , wherein
said shields have at least a first portion arranged between said first output line and said second output line, and
said first output line and said second output line are plane-symmetrically arranged, with said first portion being used as a reference.
3. A device according to claim 2 , wherein a distance between said first output line and said first portion and a distance between said second output line and said first portion lie within a range of from 0.5 μm to 6 μm.
4. A device according to claim 3 , wherein
said shields have a second portion in a direction opposite to a direction in which said first portion is seen from said first output line,
said shields have a third portion in a direction opposite to a direction in which said first portion is seen from said second output line, and
a distance between said first output line and said second portion and a distance between said second output line and said third portion lie within a range of from 0.5 μm to 6 μm.
5. A device according to claim 1 ,
wherein said shields are first shields, and wherein said device further comprises second shields, which are arranged between different layers of said first shields.
6. A solid state image pick-up device according to claim 1 , wherein said device is incorporated in an image pick-up system that includes:
an optical system for forming an image of light onto said solid state image pick-up device; and
a signal processing circuit for processing an output signal from said solid state image pick-up device.
7. A device according to claim 1 , wherein said first and second signals are capacitively held, and then transferred from said first and second output lines through a switch to said differential circuit simultaneously.
8. A solid state image pick-up device comprising:
an array having a plurality of lines on which a plurality of photoelectric converting elements are arranged;
a first output line for capacitively holding and then transmitting a first signal from a plurality of photoelectric converting elements belonging to a selected line; and
a second output line for capacitively holding and then transmitting a second signal from said plurality of photoelectric converting elements belonging to a line different from said selected line,
wherein said first output line and said second output line are arranged on a first layer, and shields for suppressing crosstalk between said first output line and said second output line are arranged in a plurality of layers including said first layer and a second layer on which said first and second output lines are not arranged, and
wherein, in at least one layer different from said first layer, said shields are arranged in positions excluding a position where said first output line vertically projects and a position where said second output line vertically projects.
9. A device according to claim 8 , wherein
said shields have at least a first portion arranged between said first output line and said second output line, and
said first output line and said second output line are plane-symmetrically arranged, with said first portion being used as a reference.
10. A solid state image pick-up device according to claim 8 , wherein said device is incorporated in an image pick-up system that includes:
an optical system for forming an image of light onto said solid state image pick-up device; and
a signal processing circuit for processing an output signal from said solid state image pick-up device.
11. A device according to claim 8 , wherein said first and second signals are capacitively held, and then simultaneously transferred from said first and second output lines through a switch to a differential circuit.