WO2006011274A1 - 光検出器 - Google Patents
光検出器 Download PDFInfo
- Publication number
- WO2006011274A1 WO2006011274A1 PCT/JP2005/007539 JP2005007539W WO2006011274A1 WO 2006011274 A1 WO2006011274 A1 WO 2006011274A1 JP 2005007539 W JP2005007539 W JP 2005007539W WO 2006011274 A1 WO2006011274 A1 WO 2006011274A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- type
- type region
- photodetector
- region
- light
- Prior art date
Links
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 238000010521 absorption reaction Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 239000004065 semiconductor Substances 0.000 claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000007257 malfunction Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/1443—Devices controlled by radiation with at least one potential jump or surface barrier
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
- H01L27/1463—Pixel isolation structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022416—Electrodes for devices characterised by at least one potential jump barrier or surface barrier comprising ring electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/08—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors
- H01L31/10—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors characterised by at least one potential-jump barrier or surface barrier, e.g. phototransistors
- H01L31/101—Devices sensitive to infrared, visible or ultraviolet radiation
- H01L31/102—Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier
Definitions
- the present invention relates to a photodetector having a circuit element formed on a semiconductor substrate and outputting a signal corresponding to light incident on a light receiving portion.
- a photodetector using a semiconductor has a photodetection unit formed by joining a p-type semiconductor and an n-type semiconductor, and the amount of incident light is reduced by a current generated when light enters the photodetection unit. Detection and processing corresponding to this are now being carried out.
- a detection error or a malfunction of the processing circuit occurs. Therefore, in the conventional photodetector, light is shielded by a light shielding film having a force such as the area around the light detection unit and the area force aluminum wiring layer in which the processing circuit is formed.
- Patent Document 1 Japanese Patent Laid-Open No. 8-78720
- the present invention has an object to effectively eliminate the influence of unnecessary light incident on an internal region of a semiconductor substrate and easily prevent detection errors and circuit malfunctions. It is said.
- the first photodetector of the embodiment of the present invention includes:
- a photodetector in which a circuit element is formed on a semiconductor substrate and outputs a signal corresponding to light incident on a light receiving unit
- a charge absorbing portion that absorbs charges generated by incident light is formed in the periphery of the circuit element provided inside the region where charges are incident by incident light from the side of the semiconductor substrate. To do.
- a first photodetector comprising:
- the charge absorbing portion is
- N-type region is formed on P-type substrate
- a p-type region is formed on the n-type substrate, or
- a p-type region and an n-type region are formed on a P-type or n-type substrate,
- a reverse bias voltage is applied to the n-type region and the Z- or P-type region.
- a first photodetector comprising:
- the circuit element is a light detection element constituting a light receiving portion.
- a plurality of the photodetecting elements are provided adjacent to each other, and the charge absorbing portion is formed between the photodetecting elements.
- a first photodetector comprising:
- the circuit element is an element that constitutes a signal processing circuit corresponding to light incident on the light receiving unit. It is characterized by being.
- the charge generated by the incident light on the peripheral portion of the circuit element is absorbed by the charge absorbing portion. That is, for example, negative charges are absorbed by n-type regions and n-type substrates, and positive charges are absorbed by P-type regions and P-type substrates. Therefore, detection errors due to the light detection element, malfunction of the signal processing circuit, and crosstalk are prevented.
- FIG. 1 is a plan view showing a configuration of a photodetector 100 according to an embodiment of the present invention.
- FIG. 2 is a circuit diagram showing an example of a circuit including a photodiode 200.
- FIG. 2 is a circuit diagram showing an example of a circuit including a photodiode 200.
- FIG. 3 is a cross-sectional view taken along line AA in FIG.
- FIG. 4 is a cross-sectional view taken along line BB in FIG.
- FIG. 5 is a cross-sectional view taken along arrow CC of FIG.
- FIG. 6 is a perspective view schematically showing a configuration in the vicinity of a cross section taken along the line CC in FIG. 1.
- FIG. 7 is a circuit diagram showing a modification of the circuit including the photodiode 200.
- FIG. 8 is a cross-sectional view showing a modified example of the configuration of FIG.
- FIG. 9 is a cross-sectional view showing a modified example of the configuration in the vicinity of the N-type region 402 in FIG.
- FIG. 10 is a cross-sectional view showing a modified example of the configuration of FIG.
- the photodetector 100 includes photodiodes 200 and 300 on a semiconductor substrate.
- the processing circuit 400 is provided.
- the photodiodes 200 and 300 are formed so as to become an anode common, for example, as shown in FIG. Specifically, for example, as shown in FIG. 3, a P-type region 112 is formed on a P-type substrate 111, and an N-type region 201 for forming a light receiving portion is further formed thereon. A force sword electrode 211 is formed on three sides around the N-type region 201. In addition, a P-type region 202 and an anode electrode 212 are formed on the three outer peripheral sides of the N-type region 201. In addition, the N-type region 203 and the charge absorption electrode 213 are formed on the outer periphery of the four sides.
- the anode electrode 212 is grounded, while a bias voltage (power supply voltage) Vcc is applied to the charge absorption electrode 213.
- the N-type region 201, the P-type region 202, and the N-type region 203 are separated by an insulating film 113 made of a silicon oxide film or a silicon nitride film when formed by an oxide film isolation type process. However, in the case of being formed by a diffusion separation type process, the separation is not necessarily required.
- the photodiode 300 has the same configuration as that of the photodiode 200 as shown in FIG.
- N-type regions 203 and 303 and charge absorption electrodes 213 and 313 are arranged in a region sandwiched between the N-type regions 201 and 301. Yes.
- the N-type regions 203 ⁇ 303 and the charge absorption electrodes 213 ⁇ 313 may be shared.
- a lateral type PNP transistor is formed. Specifically, an N-type base region 401 is formed in a P-type region 112 on a P-type substrate 111, and an N-type lead base region 421, a P-type collector region 422, and a P-type emitter region 423 are formed therein. Is formed. Electrodes 431 to 433 are connected to each of the above regions, and the electrodes 431 to 433 and the like are connected via a wiring pattern (not shown) to constitute an amplifier circuit and the like. Further, around the processing circuit 400, an N-type region 402 is formed on the N-type region 114, and a bias voltage Vcc is applied via the charge absorption electrode 412.
- the photodetector 100 configured as described above, for example, as shown in FIG. 3, when light enters the N-type region 201 (light receiving unit) of the photodiode 200 and positive and negative charges are generated.
- the negative charge moves to the processing circuit 400 or the like via the N-type region 201 and the force sword electrode 211, while the positive charge moves to the ground via the P-type region 202 and the anode electrode 212. That is, photocurrent flows and predetermined signal processing is performed.
- the power supply power is also a force in which the bias current flows to the ground.
- the current flowing through the photodiode 200 is not affected. Therefore, even if a light shielding film or the like over a wide range is not provided around the photodiode 200, the detection signal error due to unnecessary light is suppressed or reduced.
- the N-type region 402 and the charge absorption electrode 412 are formed around the processing circuit 400, the charge generated by the light incident on the outside of the N-type region 402 is also reduced. Then, it moves to the power source of the voltage Vcc through the charge absorption electrode 412. In other words, since the base current flowing through the N-type base region 401 is hardly fluctuated, a malfunction of the circuit due to unnecessary light can be achieved without providing a light shielding film over a wide area around the processing circuit 400. Can be easily suppressed.
- an example in which a photodiode is used as an anode common may be configured to be used as a force sword common as shown in FIG. That is, for example, as shown in FIG. 8, it is sufficient to form each region so that the P-type and the N-type are reversed compared to FIG.
- the substrate may be N-type.
- the force shown in the example in which the N-type region 402 is provided around the processing circuit 400 for example, as shown in FIG. 9, the P-type region 452 grounded to the inner peripheral side or the outer peripheral side and the electric charge An absorption electrode 462 may be provided.
- the P-type region 452 grounded to the inner peripheral side or the outer peripheral side and the electric charge An absorption electrode 462 may be provided.
- a P-type region for charge absorption and a charge absorption electrode may be provided outside the photodiodes 200 and 300 and between the photodiodes 200 and 300.
- the P-type region 202 and the anode electrode 212 are formed on the three outer peripheral sides of the N-type region 201 forming the light receiving portion, and further, the N-type is formed on the four outer peripheral portions.
- the region 203 and the charge absorption electrode 213 are formed
- the force sword electrode, the anode electrode, and the charge absorption electrode which are not limited to these shapes and arrangements, are provided around the light receiving unit. Alternatively, it may be provided only in part. These points also apply to the processing circuit 400.
- various polygons and circles are not limited to squares, and may be used.
- the transistor formed in the processing circuit 400 is not limited to a PNP transistor, and the same effect can be obtained even when an NPN transistor is formed.
- a vertical type N PN transistor formed by an N-type collector region 601, a P-type base region 621, an N-type extraction collector region 622, an N-type emitter region 623, and electrodes 631 to 633.
- a PNP transistor may be formed.
- the N-type region 402 and the charge absorption electrode 412 are provided.
- the collector current is mainly affected by the charge due to unnecessary light.
- the base current is affected, and the amplified current becomes the collector current. A greater effect can be obtained by providing the portion.
- the photodetector according to the present invention effectively eliminates the influence of unnecessary light incident on the internal region of the semiconductor substrate and has an effect of easily preventing detection errors and circuit malfunctions.
- a circuit element is formed on a body substrate, which is useful as an optical detector that outputs a signal corresponding to light incident on the light receiving portion.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-223588 | 2004-07-30 | ||
JP2004223588 | 2004-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006011274A1 true WO2006011274A1 (ja) | 2006-02-02 |
Family
ID=35786030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/007539 WO2006011274A1 (ja) | 2004-07-30 | 2005-04-20 | 光検出器 |
Country Status (1)
Country | Link |
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WO (1) | WO2006011274A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008075577A1 (en) * | 2006-12-21 | 2008-06-26 | Hamamatsu Photonics K.K. | Semiconductor photodetector and radiation detecting apparatus |
JP2010199275A (ja) * | 2009-02-25 | 2010-09-09 | Pioneer Electronic Corp | 光検出半導体装置、光ピックアップ及び光記録再生装置 |
US8019488B2 (en) | 2005-07-07 | 2011-09-13 | Toyota Jidosha Kabushiki Kaisha | Remote operation system, remote operation apparatus and service center |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63160270A (ja) * | 1986-12-23 | 1988-07-04 | Nikon Corp | フオトセンサと信号処理用素子を有する半導体装置 |
JPH09293847A (ja) * | 1996-04-26 | 1997-11-11 | Sanyo Electric Co Ltd | ホトダイオード内蔵集積回路 |
JPH1041488A (ja) * | 1996-07-19 | 1998-02-13 | Nec Corp | 回路内蔵受光素子 |
JP2002203954A (ja) * | 2000-10-31 | 2002-07-19 | Sharp Corp | 回路内蔵受光素子 |
JP2002296485A (ja) * | 2001-03-29 | 2002-10-09 | Fuji Electric Co Ltd | 光センサ集積回路 |
-
2005
- 2005-04-20 WO PCT/JP2005/007539 patent/WO2006011274A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63160270A (ja) * | 1986-12-23 | 1988-07-04 | Nikon Corp | フオトセンサと信号処理用素子を有する半導体装置 |
JPH09293847A (ja) * | 1996-04-26 | 1997-11-11 | Sanyo Electric Co Ltd | ホトダイオード内蔵集積回路 |
JPH1041488A (ja) * | 1996-07-19 | 1998-02-13 | Nec Corp | 回路内蔵受光素子 |
JP2002203954A (ja) * | 2000-10-31 | 2002-07-19 | Sharp Corp | 回路内蔵受光素子 |
JP2002296485A (ja) * | 2001-03-29 | 2002-10-09 | Fuji Electric Co Ltd | 光センサ集積回路 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8019488B2 (en) | 2005-07-07 | 2011-09-13 | Toyota Jidosha Kabushiki Kaisha | Remote operation system, remote operation apparatus and service center |
WO2008075577A1 (en) * | 2006-12-21 | 2008-06-26 | Hamamatsu Photonics K.K. | Semiconductor photodetector and radiation detecting apparatus |
US8084836B2 (en) | 2006-12-21 | 2011-12-27 | Hamamatsu Photonics K.K. | Semiconductor photodetector and radiation detecting apparatus |
CN102446945A (zh) * | 2006-12-21 | 2012-05-09 | 浜松光子学株式会社 | 半导体光电探测器和辐射检测装置 |
JP2010199275A (ja) * | 2009-02-25 | 2010-09-09 | Pioneer Electronic Corp | 光検出半導体装置、光ピックアップ及び光記録再生装置 |
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