Semiconductor device and photoelectric conversion device and scanner using the same
First Claim
1. A semiconductor device, comprising:
- a photoelectric conversion element outputting an electric signal in accordance with an externally input optical signal;
an internal circuit receiving said electric signal;
a signal terminal inputting or outputting a signal to said internal circuit;
a first voltage terminal supplying a first voltage;
a second voltage terminal supplying a second voltage lower than the first voltage;
a first protection element connected in an electrically reverse direction between said signal terminal and said first voltage terminal and having at least one PN junction; and
a second protection element connected in an electrically reverse direction between said first voltage terminal and said second voltage terminal and having at least one PN junction.
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Accused Products
Abstract
A semiconductor device includes a photoelectric conversion element outputting an electric signal in accordance with an externally input optical signal, an internal circuit processing the electric signal, a signal terminal inputting or outputting a signal to the internal circuit, a first voltage terminal supplying a first voltage to the internal circuit, and a second voltage terminal supplying a second voltage lower than the first voltage to the internal circuit. The semiconductor device further includes a first protection element connected in an electrically reverse direction between the signal terminal and the first voltage and having at least one PN junction and a second protection element connected in an electrically reverse direction between the first voltage and the second voltage and having at least one PN junction, so that immunity to electrostatic noise can be improved and electrostatic breakdown and malfunction of the photoelectric conversion element can be suppressed.
10 Citations
20 Claims
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1. A semiconductor device, comprising:
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a photoelectric conversion element outputting an electric signal in accordance with an externally input optical signal;
an internal circuit receiving said electric signal;
a signal terminal inputting or outputting a signal to said internal circuit;
a first voltage terminal supplying a first voltage;
a second voltage terminal supplying a second voltage lower than the first voltage;
a first protection element connected in an electrically reverse direction between said signal terminal and said first voltage terminal and having at least one PN junction; and
a second protection element connected in an electrically reverse direction between said first voltage terminal and said second voltage terminal and having at least one PN junction. - View Dependent Claims (2, 3, 4, 5, 6, 13, 15)
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7. A semiconductor device, comprising:
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a photoelectric conversion element outputting an electric signal in accordance with an externally input optical signal;
an internal circuit receiving said electric signal;
a signal terminal inputting or outputting a signal to said internal circuit;
a first voltage terminal supplying a first voltage;
a second voltage terminal supplying a second voltage lower than the first voltage;
a first protection element connected in an electrically reverse direction between said signal terminal and said second voltage terminal and having at least one PN junction; and
a second protection element connected in an electrically reverse direction between said first voltage terminal and said second voltage terminal and having at least one PN junction. - View Dependent Claims (8, 9, 10, 11, 12, 14, 16)
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17. A photoelectric conversion device formed in a rectangular shape comprising N (N is an integer equal to or larger than 2) semiconductor chips arranged along a longitudinal direction of rectangle;
- wherein
each said semiconductor chip includes a photoelectric conversion element outputting an electric signal in accordance with an externally input optical signal, an internal circuit receiving said electric signal, a signal terminal inputting or outputting a signal to said internal circuit, a first voltage terminal supplying a first voltage, a second voltage terminal supplying a second voltage lower than the first voltage, a first protection element connected in an electrically reverse direction between said signal terminal and said first voltage terminal and having at least one PN junction, and a second protection element connected in an electrically reverse direction between said first voltage terminal and said second voltage terminal and having at least one PN junction.
- wherein
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18. A photoelectric conversion device formed in a rectangular shape comprising N (N is an integer equal to or larger than 2) semiconductor chips arranged along a longitudinal direction of rectangle;
- wherein
each said semiconductor chip includes a photoelectric conversion element outputting an electric signal in accordance with an externally input optical signal, an internal circuit receiving said electric signal, a signal terminal inputting or outputting a signal to said internal circuit, a first voltage terminal supplying a first voltage, a second voltage terminal supplying a second voltage lower than the first voltage, a first protection element connected in an electrically reverse direction between said signal terminal and said second voltage terminal and having at least one PN junction, and a second protection element connected in an electrically reverse direction between said first voltage terminal and said second voltage terminal and having at least one PN junction.
- wherein
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19. A scanner comprising an image sensor portion;
- wherein
said image sensor portion includes a photoelectric conversion device formed in a rectangular shape, said photoelectric conversion device includes N (N is an integer equal to or larger than
2) semiconductor chips arranged along a longitudinal direction of rectangle, andeach said semiconductor chip includes a photoelectric conversion element outputting an electric signal in accordance with an externally input optical signal, an internal circuit receiving said electric signal, a signal terminal inputting or outputting a signal to said internal circuit, a first voltage terminal supplying a first voltage, a second voltage terminal supplying a second voltage lower than the first voltage, a first protection element connected in an electrically reverse direction between said signal terminal and said first voltage terminal and having at least one PN junction, and a second protection element connected in an electrically reverse direction between said first voltage terminal and said second voltage terminal and having at least one PN junction.
- wherein
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20. A scanner comprising an image sensor portion;
- wherein
said image sensor portion includes a photoelectric conversion device formed in a rectangular shape, said photoelectric conversion device includes N (N is an integer equal to or larger than
2) semiconductor chips arranged along a longitudinal direction of rectangle, andeach said semiconductor chip includes a photoelectric conversion element outputting an electric signal in accordance with an externally input optical signal, an internal circuit receiving said electric signal, a signal terminal inputting or outputting a signal to said internal circuit, a first voltage terminal supplying a first voltage, a second voltage terminal supplying a second voltage lower than the first voltage, a first protection element connected in an electrically reverse direction between said signal terminal and said second voltage terminal and having at least one PN junction, and a second protection element connected in an electrically reverse direction between said first voltage terminal and said second voltage terminal and having at least one PN junction.
- wherein
Specification