WO2006049172A1 - 半導体チップ - Google Patents
半導体チップ Download PDFInfo
- Publication number
- WO2006049172A1 WO2006049172A1 PCT/JP2005/020116 JP2005020116W WO2006049172A1 WO 2006049172 A1 WO2006049172 A1 WO 2006049172A1 JP 2005020116 W JP2005020116 W JP 2005020116W WO 2006049172 A1 WO2006049172 A1 WO 2006049172A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- semiconductor chip
- piece
- light receiving
- side direction
- signal lines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F39/00—Integrated devices, or assemblies of multiple devices, comprising at least one element covered by group H10F30/00, e.g. radiation detectors comprising photodiode arrays
- H10F39/80—Constructional details of image sensors
- H10F39/802—Geometry or disposition of elements in pixels, e.g. address-lines or gate electrodes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
- H04N25/617—Noise processing, e.g. detecting, correcting, reducing or removing noise for reducing electromagnetic interference, e.g. clocking noise
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/701—Line sensors
Definitions
- the present invention relates to a semiconductor chip suitable for an image sensor in which a light receiving element such as a photodiode and a circuit for processing the signal are integrated on the same semiconductor substrate.
- this semiconductor chip has an elongated rectangular shape because light receiving elements corresponding to pixels are arranged in a straight line.
- FIG. 3A shows such a conventional semiconductor chip 101, and is a plan view of the whole.
- FIG. 3B is an enlarged plan view of the end portion.
- FIG. 3C is a further enlarged view of a part of FIG. 3B, and is a plan view of a pair of signal lines.
- the semiconductor chip 101 has an elongated rectangular shape as shown in FIG. 3A.
- 3B is an enlarged view of the end portion of FIG. 3A.
- the light receiving element portion 102 in which the light receiving elements 120 corresponding to the pixels are linearly arranged from one side of the short side toward the other side,
- a readout circuit cell unit 103 in which readout circuit cells 130 corresponding to the element 120 are arranged in a straight line, and a signal output as a pair of signal lines shown in FIG.
- the common signal lines LD and DD for the signal output and the reference output are almost parallel to each other over almost the entire long side of the wiring portion 104, that is, from approximately the left end to approximately the right end in FIG. 3A.
- the common signal lines LD and DD for such signal output and reference output have a long overall length, so noise is likely to be superimposed on them. As a result, even if they are superimposed, their waveforms are close to each other and most of them are removed by the subsequent subtraction circuit.
- Patent Document 1 Japanese Patent Laid-Open No. 9-205518
- the present inventor has shortened the distance between the common signal line for the signal output and the reference output and the logic circuit portion in developing the semiconductor chip for the image sensor which is intended to reduce the size in the short side direction.
- the present invention has been made in view of such a reason, and its purpose is to eliminate superimposed noise by devising a layout shape of a pair of signal lines having a long overall length in an elongated rectangular semiconductor chip.
- An object of the present invention is to provide a semiconductor chip that can be easily processed.
- the semiconductor chip including an elongated and rectangular shape, a logic circuit section that generates switching noise, and a wiring section provided with a pair of signal lines
- the pair Each of the signal lines has a proximity piece on the side close to a substantial outer edge extending in the long side direction of the logic circuit portion, a separation piece on the far side, and a connection piece for connecting them.
- the mutual proximity pieces and the separation pieces are parallel to each other, and the mutual connection pieces intersect each other.
- a light receiving unit in which a plurality of light receiving elements corresponding to the pixels are linearly arranged in the long side direction, and a readout circuit unit corresponding to the light receiving element. And a plurality of readout circuit cell portions arranged linearly in the long side direction, the logic circuit portion generates a control signal for controlling the readout circuit cell portion, and the pair of signal lines are A common signal line for signal output of the plurality of light receiving elements and a common signal line for reference output of the plurality of light receiving elements are provided between the readout circuit cell unit and the logic circuit unit.
- the common signal line for the signal output of the light receiving element and the common signal line for the reference output of the light receiving element are alternately close to and away from the logic circuit portion where output noise is likely to occur. Repeatedly arranged.
- each of the pair of signal lines is close to the substantial outer edge extending in the long-side direction of the logic circuit portion, far from the adjacent piece on the side, and the separated piece on the side. Since the adjacent proximity piece and the separation piece are parallel to each other and are arranged so that the mutual connection pieces intersect each other, the noise waveform that overlaps even if the total length is long Since they are almost the same, noise can be easily removed.
- the noise waveform superimposed on the common signal line of the signal output of the light receiving element and the common signal line of the reference output of the light receiving element are substantially the same.
- the signal can be easily removed by subtracting the signal using a subtracting circuit in the subsequent stage.
- FIG. 1 is a circuit diagram of a semiconductor chip for an image sensor.
- FIG. 2A is a plan view of the entire semiconductor chip according to the embodiment of the present invention.
- FIG. 2B is an enlarged plan view of an end portion of the semiconductor chip.
- FIG. 2C is an enlarged plan view of a part of the semiconductor chip, and is a plan view of a pair of signal lines.
- FIG. 3A is a plan view of the entire conventional semiconductor chip.
- FIG. 3B is an enlarged plan view of an end portion of a conventional semiconductor chip.
- FIG. 3C is an enlarged plan view of a part of a conventional semiconductor chip, and is a plan view of a pair of signal lines. Explanation of symbols
- FIG. 1 is a circuit diagram of the semiconductor chip 1.
- Semiconductor chip [A light receiving element section 2 having a plurality of light receiving elements 20, a read circuit cell section 3 having a read circuit cell 30 corresponding to each light receiving element 20, and a logic circuit section for generating various control signals 5 and an analog circuit section 6 that performs amplification or the like and outputs an output signal to the outside via the output pad 73.
- the logic circuit section 5 is input via the input pads 71 and 72, respectively, with the external clock CLK and the start signal SP power.
- control signals BI, WTL, WTD, RD ni , RD ⁇ RD, etc. for controlling the read circuit cell unit 3 and a control signal PR for controlling the analog circuit unit 6 described later are generated.
- Signals BI, WTL, and WTD are commonly used for all readout circuit cells 30, and control signals RD, RD, and RD are used for separate readout circuit cells 30 and all n-l n n + 1
- connection point A connected to the light receiving element 20 is pre-charged to the bias voltage V according to the control signal BI.
- the nota 32 is composed of an emitter follower circuit.
- the analog circuit section 6 includes buffers 61 and 62 for buffering and outputting the voltages of the signal output and reference output common signal lines LD and DD, and the output voltage of the buffer 61 and the output voltage of the buffer 62.
- a subtractor circuit 63 that outputs a voltage corresponding to the difference between them, an amplifier circuit 64 that amplifies and outputs the output voltage of the subtractor circuit 63, and a buffer 65 that buffers the output voltage of the amplifier circuit 64 and outputs it to the outside.
- the analog circuit section 6 includes NMOS transistors 66 and 67 for precharging the common signal lines LD and DD for signal output and reference output to the common signal line reference voltage V in accordance with the control signal PR.
- the semiconductor chip 1 for the image sensor operates as follows.
- the voltage at the connection point A depends on the amount of light incident on the light receiving element 20, and when activated by the start signal SP, the voltage at the connection point A is stored in the capacitor 33 via the buffer 32 and the transistor 35. . Subsequently, the connection point A is precharged via the transistor 31, and then the voltage at the connection point A is stored in the capacitor 34 via the buffer 32 and the transistor 36 in a state where light is not incident on the light receiving element 20. .
- the voltage of each of the common signal lines LD and DD for the signal output and the reference output is input to the subtraction circuit 63 via the buffers 61 and 62, and the output voltage is amplified by the amplification circuit 64 and passed through the buffer 65. Output to the outside.
- the subtraction circuit 63 outputs the difference between the voltages of the common signal lines LD and DD for the signal output and the reference output, the same noise waveform superimposed on them is removed.
- FIG. 2A to 2C are plan views of the semiconductor chip 1.
- FIG. The semiconductor chip 1 is obtained by realizing the above-described image sensor circuit shown in FIG. 1 on a semiconductor substrate.
- Figure 2A is a plan view of the whole.
- FIG. 2B is an enlarged plan view of the end portion.
- FIG. 2C is an enlarged view of a part of FIG. 2A, and is a plan view of a pair of signal lines.
- the semiconductor chip 1 has a long and narrow rectangle (for example, the short side is about 0.35 mm and the long side is about 18.5 mm). Then, as shown in FIG.
- the light receiving element 20 corresponding to the pixels is linearly arranged from one side of the short side of the rectangle toward the other side.
- the readout circuit cell 30 corresponding to the light receiving element 20 is arranged in a straight line.
- the readout circuit cell unit 3 is provided.
- the wiring unit 4 is provided with a common signal line LD, DD for signal output and reference output as a pair of signal lines.
- the logic circuit unit 5 and the analog circuit unit 6 are arranged extending in the long side direction of the rectangle.
- a plurality of input / output pads 7, 7,... Are provided in the analog circuit section 6.
- the common signal lines LD and DD for signal output and reference output are arranged in the wiring portion 4 from approximately the left end to the right end of the long side. As shown in FIG. 2C, these extend in the long side direction while exchanging positions in the short side direction for each predetermined length.
- the signal output common signal line LD is connected to the proximity piece 43 on the side closer to the substantial outer edge extending in the long side direction of the logic circuit section 5 and the separation piece 41 on the far side. It has pieces 42 and 44, and these are repeated.
- the connection pieces 42 and 44 are inclined in an oblique direction (for example, 45 °) with respect to the long side direction.
- the common signal line DD of the reference output is also on the substantial outer edge extending in the long side direction of the logic circuit section 5.
- it has a proximity piece 45 on the side, a separation piece 47 on the far side, and connection pieces 46 and 48 for connecting them, and these are repeated.
- the connection pieces 46 and 48 are inclined in an oblique direction (for example, 45 °) with respect to the long side direction.
- the proximity piece and the separation piece that is, the proximity piece 45 and the separation piece 41 and the proximity piece 43 and the separation piece 47 are parallel to each other, and the connection pieces, that is, the connection piece 42 and the connection piece 46 and the connection piece are connected.
- the piece 44 and the connecting piece 48 are arranged so as to cross each other.
- the signal output common signal line LD separation piece 41, proximity piece 43, connection piece 44 and reference output common signal line DD proximity piece 45, connection piece 46, separation piece 47 are formed on a predetermined metal layer,
- the signal output common signal line LD connecting piece 42 and the reference output common signal line DD connecting piece 48 are formed on different metal layers.
- the common signal lines LD and DD for the signal output and the reference output are arranged in this way, and operate as follows. Since the common signal lines LD and DD for the signal output and the reference output are close to the logic circuit section 5, the parasitic capacitance with the elements constituting the logic circuit section 5 or the wiring drawn therefrom is large. Therefore, switching noise synchronized with the external clock CLK is easily transmitted through the parasitic capacitance to the common signal lines LD and DD of the signal output and the reference output directly or through the wiring from those elements. Looking at a part, the effect of switching noise on the common signal lines LD and DD for signal output and reference output is different.
- the influence of switching noise on the proximity piece 45 of the common signal line DD of the reference output is slightly larger than the influence of the signal output common signal line LD on the separation piece 41.
- the influence of the switching noise on the separation piece 47 of the common signal line DD of the reference output is slightly smaller than the influence of the signal output on the proximity piece 43 of the common signal line LD. Therefore, as a whole, the influence of switching noise on each of the common signal lines LD and DD for the signal output and the reference output is almost the same, and the superimposed noise waveform is also the same. Then, substantially the same noise waveform superimposed on the signal output and reference output common signal lines LD and DD is removed by the subsequent subtracting circuit 63.
- the predetermined lengths of the long sides of the separation pieces 41 and 47 and the proximity pieces 43 and 45 of the common signal lines LD and DD for the signal output and the reference output are optimized by experiment or simulation. In addition, it does not necessarily have to be constant, but it is desirable that it is constant in order to facilitate layout design.
- the semiconductor chip according to the embodiment of the present invention has been described above. However, the present invention is not limited to the one described in the embodiment, but various modifications within the scope of the matters described in the claims. Design changes are possible. For example, the signal output and reference output common communication lines LD and DD can be divided to achieve high speed transmission. Of course, MOS transistors and bipolar transistors can be replaced. In addition, the present invention is not limited to the image sensor semiconductor chip, It can be applied to rectangular semiconductor chips.
- the present invention can be used for an elongated semiconductor chip having a circuit part that easily generates noise, and a pair of signal lines arranged along the circuit part, and in particular, an image sensor having a plurality of light receiving elements. It is suitable for.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Facsimile Heads (AREA)
- Semiconductor Integrated Circuits (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Image Input (AREA)
- Semiconductor Memories (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/718,552 US20070291146A1 (en) | 2004-11-05 | 2005-11-01 | Semiconductor Chip |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-322191 | 2004-11-05 | ||
| JP2004322191A JP4817354B2 (ja) | 2004-11-05 | 2004-11-05 | 半導体チップ |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006049172A1 true WO2006049172A1 (ja) | 2006-05-11 |
Family
ID=36319177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/020116 Ceased WO2006049172A1 (ja) | 2004-11-05 | 2005-11-01 | 半導体チップ |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20070291146A1 (ja) |
| JP (1) | JP4817354B2 (ja) |
| TW (1) | TWI357254B (ja) |
| WO (1) | WO2006049172A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5106052B2 (ja) * | 2007-11-08 | 2012-12-26 | キヤノン株式会社 | 固体撮像素子、撮像システム、及び固体撮像素子の駆動方法 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5784149A (en) * | 1980-11-14 | 1982-05-26 | Hitachi Ltd | Semiconductor integrated circuit device |
| JPS60229472A (ja) * | 1984-04-26 | 1985-11-14 | Nec Corp | イメ−ジセンサ |
| JPS62174943A (ja) * | 1986-01-29 | 1987-07-31 | Hitachi Ltd | 回路装置 |
| JPH04298155A (ja) * | 1991-03-26 | 1992-10-21 | Kyocera Corp | イメージセンサ |
| JPH11275471A (ja) * | 1998-02-02 | 1999-10-08 | Hewlett Packard Co <Hp> | アクティブ画素センサの読み出しチャネル |
| JP2002543683A (ja) * | 1999-04-23 | 2002-12-17 | ポラロイド コーポレイション | 線形モード電圧/電流変換を有するアクティブピクセル画像検出装置 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5771070A (en) * | 1985-11-15 | 1998-06-23 | Canon Kabushiki Kaisha | Solid state image pickup apparatus removing noise from the photoelectric converted signal |
| US5994765A (en) * | 1996-07-01 | 1999-11-30 | Sun Microsystems, Inc. | Clock distribution network with efficient shielding |
| US20050253287A1 (en) * | 2004-05-11 | 2005-11-17 | Taiwan Semiconductor Manufacturing Co., Ltd. | Dual-port SRAM cell structure |
-
2004
- 2004-11-05 JP JP2004322191A patent/JP4817354B2/ja not_active Expired - Fee Related
-
2005
- 2005-11-01 WO PCT/JP2005/020116 patent/WO2006049172A1/ja not_active Ceased
- 2005-11-01 US US11/718,552 patent/US20070291146A1/en not_active Abandoned
- 2005-11-04 TW TW094138841A patent/TWI357254B/zh not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5784149A (en) * | 1980-11-14 | 1982-05-26 | Hitachi Ltd | Semiconductor integrated circuit device |
| JPS60229472A (ja) * | 1984-04-26 | 1985-11-14 | Nec Corp | イメ−ジセンサ |
| JPS62174943A (ja) * | 1986-01-29 | 1987-07-31 | Hitachi Ltd | 回路装置 |
| JPH04298155A (ja) * | 1991-03-26 | 1992-10-21 | Kyocera Corp | イメージセンサ |
| JPH11275471A (ja) * | 1998-02-02 | 1999-10-08 | Hewlett Packard Co <Hp> | アクティブ画素センサの読み出しチャネル |
| JP2002543683A (ja) * | 1999-04-23 | 2002-12-17 | ポラロイド コーポレイション | 線形モード電圧/電流変換を有するアクティブピクセル画像検出装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI357254B (en) | 2012-01-21 |
| TW200620981A (en) | 2006-06-16 |
| US20070291146A1 (en) | 2007-12-20 |
| JP2006135065A (ja) | 2006-05-25 |
| JP4817354B2 (ja) | 2011-11-16 |
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