WO2021229995A1 - 半導体装置、温度補正システム、及び、アラームシステム - Google Patents
半導体装置、温度補正システム、及び、アラームシステム Download PDFInfo
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- G01K7/01—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using semiconducting elements having PN junctions
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Definitions
- This disclosure relates to semiconductor devices, temperature compensation systems, and alarm systems.
- the temperature measured by the temperature sensor may vary due to manufacturing variations and the like.
- the temperature of the device is measured by contacting the pad electrode with a thermocouple, and the measured temperature is corrected by the temperature sensor based on the measurement result (for example). See Patent Document 1).
- the present disclosure provides a semiconductor device capable of grasping the actual temperature in units of semiconductor chips while driving the device, a temperature compensation system for the semiconductor device, and an alarm system using the temperature compensation system. The purpose.
- the semiconductor device of the present disclosure for achieving the above object is Semiconductor chip, Multiple pad electrodes formed in the semiconductor chip, and An impedance element, which is electrically connected between at least two pad electrodes of a plurality of pad electrodes, is provided. and, The temperature of the semiconductor chip can be measured by applying a constant electric signal between at least two pad electrodes to which the impedance element is connected from the outside of the semiconductor chip.
- the temperature compensation system of the present disclosure for achieving the above object is A semiconductor device with a semiconductor chip equipped with a temperature sensor, A temperature measuring unit that measures the temperature of a semiconductor chip, and It is equipped with a temperature compensation unit that compensates for the temperature measured by the temperature sensor.
- the semiconductor device has a plurality of pad electrodes formed in a semiconductor chip, and an impedance element electrically connected between at least two pad electrodes of the plurality of pad electrodes.
- the temperature measuring unit measures the temperature of the semiconductor chip by giving a constant electric signal between at least two pad electrodes to which the impedance element is connected from the outside of the semiconductor chip.
- the temperature compensating unit corrects the temperature measured by the temperature sensor based on the temperature of the semiconductor chip measured by the temperature measuring unit.
- the alarm system of the present disclosure for achieving the above object is A semiconductor device with a semiconductor chip equipped with a temperature sensor, Temperature measuring unit that measures the temperature of semiconductor chips, A temperature compensator that corrects the temperature measured by the temperature sensor, and Alarm section, To prepare for. and,
- the semiconductor device has a plurality of pad electrodes formed in a semiconductor chip, and an impedance element electrically connected between at least two pad electrodes of the plurality of pad electrodes.
- the temperature measuring unit measures the temperature of the semiconductor chip by giving a constant electric signal between at least two pad electrodes to which the impedance element is connected from the outside of the semiconductor chip.
- the temperature compensator corrects the temperature measured by the temperature sensor based on the temperature of the semiconductor chip measured by the temperature measuring unit.
- the alarm unit issues an alarm when it detects that the temperature corrected by the temperature compensation unit exceeds a predetermined reference temperature.
- FIG. 1 is a system configuration diagram showing an outline of a basic configuration of a CMOS image sensor, which is an example of the semiconductor device of the present disclosure.
- FIG. 2 is a circuit diagram showing an example of a pixel circuit configuration.
- FIG. 3A is a diagram showing an example of the actual temperature at the portion of each semiconductor chip in the wafer, and
- FIG. 3B is an explanatory diagram of measuring the in-plane temperature of the wafer by a thermocouple.
- FIG. 4A is a diagram showing the relationship between the semiconductor chip to be measured on the wafer and the probe needle in the semiconductor device according to the first embodiment of the present disclosure, and
- FIG. 4B is a diagram showing two pads to which resistance elements are connected.
- FIG. 5A is a circuit diagram showing a configuration example of temperature measurement according to the first embodiment
- FIG. 5B is a diagram showing an example of the relationship between the current value flowing through the resistance element and the temperature.
- FIG. 6A is a circuit diagram showing a configuration example of temperature measurement according to the second embodiment
- FIG. 6B is a circuit diagram showing a configuration example of the temperature measurement according to the third embodiment.
- FIG. 7 is a diagram showing an example of the arrangement structure of the pad electrodes according to the fourth embodiment.
- FIG. 8 is a diagram showing an example of the arrangement structure of the pad electrodes according to the fifth embodiment.
- FIG. 5A is a circuit diagram showing a configuration example of temperature measurement according to the first embodiment
- FIG. 5B is a diagram showing an example of the relationship between the current value flowing through the resistance element and the temperature.
- FIG. 6A is a circuit diagram showing a configuration example of temperature measurement according to the second embodiment
- FIG. 6B is a circuit diagram showing a configuration example of the temperature measurement according to
- FIG. 9 is a diagram showing an example of the arrangement structure of the pad electrodes according to the sixth embodiment.
- FIG. 10 is a diagram showing an example of the arrangement structure of the pad electrodes according to the seventh embodiment.
- FIG. 11 is a diagram showing an example of the arrangement structure of the pad electrodes according to the eighth embodiment.
- FIG. 12 is a diagram showing an example of the arrangement structure of the pad electrodes according to the ninth embodiment.
- FIG. 13A is a diagram showing an arrangement structure of pad electrodes according to an application example (No. 1)
- FIG. 13B is a diagram showing an arrangement structure of pad electrodes according to an application example (No. 2).
- FIG. 14 is a diagram showing other arrangement locations of pad electrodes for temperature measurement.
- FIG. 15 is an exploded perspective view showing a semiconductor chip structure having a laminated structure.
- FIG. 16 is a system configuration diagram showing an example of the system configuration of the temperature compensation system according to the second embodiment of the present disclosure.
- FIG. 17 is a system configuration diagram showing an example of the system configuration of the alarm system according to the third embodiment of the present disclosure.
- FIG. 18 is a block diagram showing a schematic configuration example of a vehicle control system, which is an example of a mobile control system to which the technique according to the present disclosure can be applied.
- FIG. 19 is a diagram showing an example of an installation position of an image pickup apparatus in a mobile control system.
- Example 1 Example of measuring temperature by applying a constant voltage to a resistance element
- Example 2 Example of measuring temperature by passing a constant current through a resistance element
- Example 3 (Variation example of Example 1: An example in which a reference resistance element is provided in the measurement system) 3-4.
- Example 4 (Example of arrangement structure of pad electrode to which resistance element is connected) 3-5.
- Example 5 (Modification of Example 4: Example in which the size of the two pad electrodes to which the resistance element is connected is larger than the size of the other pad electrodes) 3-6.
- Example 6 (Modification of Example 4: Example in which the size of the two pad electrodes to which the resistance element is connected is smaller than the size of the other pad electrodes) 3-7.
- Example 7 (Variation example of Example 4: An example in which two pad electrodes to which a resistance element is connected are arranged with another pad electrode interposed therebetween). 3-8.
- Example 8 (Variation example of Example 4: An example in which each of the two pad electrodes to which the resistance element is connected is composed of a plurality of pad electrodes). 3-9.
- Example 9 (Modification example of Example 8: Example in which the number of pad electrodes to which the resistance element is connected is 3) 3-10.
- Example 10 (Application example of two pad electrodes) 3-11. Modification example of the first embodiment 3-12.
- the impedance element may be configured to be a temperature-dependent element, preferably a resistance element.
- the semiconductor chip may be configured to have a temperature sensor for measuring the temperature inside the device.
- the size of at least two pad electrodes to which the impedance elements are connected can be larger than the size of the other pad electrodes.
- the size of at least two pad electrodes to which the impedance elements are connected can be smaller than the size of the other pad electrodes.
- At least two pad electrodes to which the impedance element is connected can be configured so as to sandwich another pad electrode.
- at least two pad electrodes to which impedance elements are connected can be configured to consist of a plurality of pad electrodes adjacent to each other and electrically connected to each other.
- the number of pad electrodes to which the impedance element is connected can be 3 or more.
- the wiring for electrically connecting the three or more pad electrodes and the impedance element can be configured such that the conductor length, the conductor material, the wire diameter, and the electrical resistance are equal to each other.
- a semiconductor chip having a laminated structure in which a first semiconductor chip and a second semiconductor chip are laminated and electrically connected to each other is provided. It can be configured to have an image pickup device.
- the first semiconductor chip may have a pixel array portion in which pixels are arranged
- the second semiconductor chip may have a peripheral circuit portion of the pixel array portion.
- the impedance element at least two pad electrodes provided on the first semiconductor chip and to which the impedance element is connected can be configured to be provided on the second semiconductor chip.
- a constant voltage is applied to the resistance element in the temperature measuring unit, and the temperature of the semiconductor chip is calculated from the current value flowing through the resistance element.
- a constant current may be passed through the resistance element, and the temperature of the semiconductor chip may be calculated from the voltage values across the resistance element.
- An image pickup device can be exemplified as a semiconductor device to which the technique according to the present disclosure is applied.
- a CMOS (Complementary Metal Oxide Semiconductor) image sensor which is a kind of an XY address type image pickup device, will be described as an example of the image pickup device.
- a CMOS image sensor is an image sensor made by applying or partially using a CMOS process.
- FIG. 1 is a system configuration diagram showing an outline of a basic configuration of a CMOS image sensor, which is an example of the semiconductor device of the present disclosure.
- the CMOS image sensor 1 has a configuration in which a pixel array unit 11 and a peripheral circuit unit of the pixel array unit 11 are integrated on a semiconductor chip (semiconductor substrate) 10.
- the pixel array unit 11 pixels 20 including a photoelectric conversion element that generates an amount of light charge corresponding to the amount of incident light are two-dimensionally arranged in the row direction and the column direction, that is, in a matrix.
- the row direction means the arrangement direction of the pixels 20 in the pixel row, that is, the direction along the pixel row (so-called horizontal direction)
- the column direction means the arrangement direction of the pixels 20 in the pixel row, that is, The direction along the pixel array (so-called vertical direction).
- the peripheral circuit unit of the pixel array unit 11 is composed of, for example, each circuit unit such as a row selection unit 12, a column processing unit 13, a logic circuit unit 14, and a timing control unit 15.
- each circuit unit such as a row selection unit 12, a column processing unit 13, a logic circuit unit 14, and a timing control unit 15.
- each function of the row selection unit 12, the column processing unit 13, the logic circuit unit 14, the timing control unit 15, and the like will be described.
- the row selection unit 12 is composed of a shift register, an address decoder, and the like, and controls the scanning of the pixel row and the address of the pixel row when selecting each pixel 20 of the pixel array unit 11. Although the specific configuration of the row selection unit 12 is not shown, it generally has two scanning systems, a read scanning system and a sweep scanning system.
- the read scanning system selectively scans the pixels 20 of the pixel array unit 11 row by row in order to read the pixel signal from the pixels 20.
- the pixel signal read from the pixel 20 is an analog signal.
- the sweep scanning system performs sweep scanning in advance of the read scan performed by the read scan system by the time of the shutter speed.
- the photoelectric conversion unit is reset by sweeping out unnecessary charges from the photoelectric conversion unit of the pixel 20 in the read row. Then, by sweeping out (resetting) unnecessary charges by this sweeping scanning system, a so-called electronic shutter operation is performed.
- the electronic shutter operation refers to an operation of discarding the optical charge of the photoelectric conversion unit and starting a new exposure (starting the accumulation of the optical charge).
- the pixel signal read from each pixel 20 of the pixel row selected by the row selection unit 12 is supplied to the column processing unit 13 for each pixel column.
- the column processing unit 13 is configured to include, for example, an analog-to-digital converter (ADC) that converts an analog pixel signal output from the pixel 20 into a digital pixel signal.
- ADC analog-to-digital converter
- analog-to-digital converter in the column processing unit 13 for example, a single slope type analog-to-digital converter, which is an example of a reference signal comparison type analog-to-digital converter, can be used.
- analog-to-digital converter is not limited to the single slope type analog-to-digital converter, such as a serial comparison type analog-digital converter and a delta-sigma modulation type ( ⁇ modulation type) analog-digital converter. Can be used.
- the logic circuit unit 14 has, for example, an arithmetic processing function, and executes predetermined signal processing on a pixel signal read from each pixel 20 of the pixel array unit 11 through the column processing unit 13 and outputs the signal. ..
- the timing control unit 15 generates various timing signals, clock signals, control signals, and the like, and drives the row selection unit 12, the column processing unit 13, the logic circuit unit 14, and the like based on the generated signals. Take control.
- the image pickup device represented by the CMOS image sensor 1 having the above configuration is equipped with a temperature sensor 16 inside the device in order to measure the temperature inside the device.
- the temperature sensor 16 is configured to generate the temperature inside the device, for example, by using the same technique as the well-known bandgap voltage reference circuit.
- the temperature sensor 16 for measuring the temperature inside the device is preferably formed in the region where the peripheral circuit portion of the pixel array portion 11 is formed.
- the portion where the temperature rises when the device is operated is considered to be, for example, the column processing portion 13 among the peripheral circuit portions. Therefore, in this example, the temperature sensor 16 is formed in the region where the column processing unit 13 is formed.
- FIG. 2 is a circuit diagram showing an example of the circuit configuration of the pixel 20.
- the pixel 20 has, for example, a photodiode 21 as a photoelectric conversion element (light receiving element).
- the pixel 20 has a pixel configuration including a transfer transistor 22, a reset transistor 23, an amplification transistor 24, and a selection transistor 25 in addition to the photodiode 21.
- an N-channel MOS field effect transistor FET
- the transfer transistor 22 the reset transistor 23
- the amplification transistor 24 the selection transistor 25.
- the combination of the conductive types of the four transistors 22 to 25 exemplified here is only an example, and is not limited to these combinations.
- a transfer signal TRG, a reset signal RST, and a selection signal SEL are appropriately given to the pixel 20 from the row selection unit 12 described above.
- the anode electrode is connected to a low-potential side power supply (for example, ground), and the received light is photoelectrically converted into a light charge (here, a photoelectron) having a charge amount corresponding to the light amount, and the light thereof is converted. Accumulates electric charge.
- the cathode electrode of the photodiode 21 is electrically connected to the gate electrode of the amplification transistor 24 via the transfer transistor 22.
- the region in which the gate electrode of the amplification transistor 24 is electrically connected is a floating diffusion (floating diffusion region / impurity diffusion region) FD.
- the floating diffusion FD is a charge-voltage conversion unit that converts electric charge into voltage.
- a transfer signal TRG in which a high level (for example, V DD level) is active is given to the gate electrode of the transfer transistor 22 from the row selection unit 12. Then, the transfer transistor 22 becomes conductive in response to the transfer signal TRG, is photoelectrically converted by the photodiode 21, and transfers the optical charge stored in the photodiode 21 to the floating diffusion FD.
- a high level for example, V DD level
- the reset transistor 23 is connected between the node of the high potential side power supply voltage V DD and the floating diffusion FD.
- a reset signal RST that activates a high level is given to the gate electrode of the reset transistor 23 from the row selection unit 12. Then, the reset transistor 23 becomes conductive in response to the reset signal RST, and resets the floating diffusion FD by discarding the charge of the floating diffusion FD to the node of the voltage V DD.
- the gate electrode is connected to the floating diffusion FD, and the drain electrode is connected to the node of the high potential side power supply voltage VDD.
- the amplification transistor 24 serves as an input unit for a source follower that reads out a signal obtained by photoelectric conversion in the photodiode 21. That is, in the amplification transistor 24, the source electrode is connected to the vertical signal line VSL via the selection transistor 25.
- the amplification transistor 24 and the current source I connected to one end of the vertical signal line VSL form a source follower that converts the voltage of the floating diffusion FD into the potential of the vertical signal line VSL.
- the drain electrode is connected to the source electrode of the amplification transistor 24, and the source electrode is connected to the vertical signal line VSL.
- a selection signal SEL in which a high level is active is given to the gate electrode of the selection transistor 25 from the row selection unit 12. Then, the selection transistor 25 enters a conduction state in response to the selection signal SEL, sets the pixel 20 in the selection state, and transmits the signal output from the amplification transistor 24 to the vertical signal line VSL.
- a 4Tr configuration including a transfer transistor 22, a reset transistor 23, an amplification transistor 24, and a selection transistor 25, that is, four transistors (Tr) is taken as an example.
- the selection transistor 25 may be omitted, and the amplification transistor 24 may have a 3Tr configuration in which the function of the selection transistor 25 is provided. If necessary, the number of transistors may be increased to a configuration of 5Tr or more. ..
- the semiconductor chip structure of the CMOS image sensor 1 described above has a so-called horizontal structure.
- the peripheral circuit unit of the pixel array unit 11, that is, the row selection unit 12, the column processing unit 13, the logic circuit unit 14, the timing control unit 15, and the like, and the pixel array unit in which the pixels 20 are arranged are arranged. It is a chip structure formed on the same semiconductor chip (semiconductor substrate) 10 as 11.
- the semiconductor chip structure of the CMOS image sensor 1 is not limited to the horizontal structure, but may be a so-called laminated structure.
- the laminated structure is a chip structure in which a peripheral circuit portion of the pixel array portion 11 is formed on at least one semiconductor substrate different from the semiconductor substrate on which the pixel array portion 11 is formed. According to this laminated structure, the size (area) of the first layer semiconductor substrate to form the pixel array portion 11 is sufficient, so that the size of the first layer semiconductor substrate, and eventually the size of the entire chip, is reduced. can.
- a process suitable for manufacturing the pixel 20 can be applied to the semiconductor substrate of the first layer and a process suitable for manufacturing the circuit portion can be applied to the other semiconductor substrate, a process suitable for manufacturing the CMOS image sensor 1 can be applied. There is also the merit of being able to optimize.
- thermocouple Measurement of in-wafer surface temperature by thermocouple
- the in-vehicle image sensor is equipped with a temperature sensor (thermometer) inside the device to stop the function when the system reaches the upper limit temperature.
- a temperature sensor thermometer
- the device is brought into contact with the wafer 102 on which the semiconductor chip 101 is arranged by contacting the thermocouple 103 as shown in FIG. 3B. The temperature is measured and the measured temperature of the temperature sensor is corrected based on the measurement result.
- the problem with this temperature correction is the temperature variation within the wafer surface. Therefore, it is necessary to measure the temperature for each semiconductor chip and correct the temperature measured by the temperature sensor for each semiconductor chip.
- the thermocouple is brought into contact with the pad electrode described above to adjust the in-plane temperature of the wafer. With the conventional technique for measuring, it is not possible to grasp the actual temperature in units of semiconductor chips while driving the device. As a result, the difference between the set temperature of the wafer prober and the actual temperature becomes a temperature correction error, which is a problem especially for achieving an accuracy of ⁇ 1 degree in a high temperature range.
- FIG. 3A shows the actual temperature of each semiconductor chip 101 (for example, 123 degrees, 125 degrees, 127 degrees) in the wafer 102 when the set temperature of the wafer prober is, for example, 125 degrees.
- An image pickup device which is an example of the semiconductor device according to the first embodiment of the present disclosure, specifically, a CMOS image sensor 1 having a temperature sensor 16 for measuring the temperature inside the device inside the device drives the device.
- CMOS image sensor 1 having a temperature sensor 16 for measuring the temperature inside the device inside the device drives the device.
- it is possible to grasp (measure) the actual temperature in semiconductor chip units hereinafter, may be simply abbreviated as "chip units").
- the CMOS image sensor 1 In order to enable grasping the actual temperature in chip units, the CMOS image sensor 1 according to the present embodiment has an impedance element between at least two pad electrodes of a plurality of pad electrodes formed in the semiconductor chip 10. It is configured to be electrically connected. Then, when measuring the actual temperature of the semiconductor chip 10 between at least two pad electrodes to which the impedance element is connected, a constant electric signal (constant voltage or constant current) is transmitted from the outside of the semiconductor chip 10. ) Is given.
- a temperature-dependent element for example, a resistance element 31
- a probe needle 33 (33 _1 , 33 _2 ) is passed between the pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected to be constant.
- an electrical signal constant voltage or constant current.
- a resistance element is exemplified as an element to be mounted inside the semiconductor chip 10 for temperature measurement, but the present invention is not limited to the resistance element, and an impedance element such as a diode may be exemplified in addition to the resistance element. Can be done.
- a clock, a voltage, or the like is given to the pad electrode 32 _3 through the probe needle 33 _3.
- a constant electric signal (constant voltage or constant current) is applied from the outside of the semiconductor chip 10 to, for example, the resistance element 31 mounted inside the semiconductor chip 10 for temperature measurement.
- the actual temperature can be measured in chip units while driving the device.
- the resistance element 31 mounted inside the semiconductor chip 10 as a sensor, the actual temperature of the semiconductor chip 10 can be measured even in the assembly as the CMOS image sensor 1.
- the resistance element 31 is mounted as an impedance element in the semiconductor chip 10 and the actual temperature of the semiconductor chip 10 is measured in chip units will be described.
- the first embodiment is an example in which a constant voltage is applied to the resistance element 31 to measure the actual temperature of the semiconductor chip 10.
- FIG. 5A shows a configuration example of the temperature measurement according to the first embodiment.
- FIG. 5B shows an example of the relationship between the current value flowing through the resistance element 31 and the temperature TJ.
- the relationship of FIG. 5B in which the current value decreases as the temperature TJ rises is an example, and is not limited to this relationship.
- a constant voltage Vin is applied from the voltage source 41 between the pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected and flows to the resistance element 31.
- the current value I meas is measured with an ammeter 42.
- the ammeter 42 measures the current value I meas according to the resistance value of the resistance element 31.
- This current value I meas reflects the properties of the resistance material of the resistance element 31.
- the current value I reflecting the properties of the resistance material of the resistance element 31 having temperature dependence. You can measure meas. From this measured current value I meas , the temperature inside the semiconductor chip 10 can be calculated. The calculated temperature can be used as a correction temperature for the measured temperature of the temperature sensor 16 (see FIG. 1) mounted on the semiconductor chip 10 of the CMOS image sensor 1.
- the second embodiment is an example in which a constant current is passed through the resistance element 31 to measure the actual temperature of the semiconductor chip 10.
- FIG. 6A shows a configuration example of the temperature measurement according to the second embodiment.
- a constant current I force is passed from the current source 43 through the pad electrode 32 _1 to the resistance element 31, and the voltage connected between the pad electrodes 32 _1 and 32 _2.
- the voltage value between both ends of the resistance element 31 is measured by the total 44.
- the voltmeter 44 measures the voltage value V meas according to the resistance value of the resistance element 31. This voltage value V meas reflects the properties of the resistance material of the resistance element 31.
- the voltage value V meas reflecting the property of the resistance material of the resistance element 31 having temperature dependence by passing a constant current I force through the resistance element 31. Can be measured. From this measured voltage value V meas , the temperature inside the semiconductor chip 10 can be calculated. Then, the calculated temperature can be used as a correction temperature for the measured temperature of the temperature sensor 16.
- Example 3 is a modification of Example 1, and is an example in which a reference resistance element is provided in the measurement system.
- FIG. 6B shows a configuration example of the temperature measurement according to the third embodiment.
- the resistance component 45 of the measurement system exists between the ammeter 42 and the pad electrode 32 _1 in the measurement system according to the first embodiment.
- the reference resistance element 46 is connected between the pad electrodes 32 _1 and 32 _2.
- the reference resistance element 46 is inserted between the pad electrodes 32 _1 and 32 _2 because the measurement accuracy decreases when the influence of the resistance component 45 of the measurement system outside the semiconductor chip 10 becomes large.
- the property of the resistance material of the resistance element 31 having the temperature dependence is reflected in the same manner as in the case of the temperature measurement according to the first embodiment.
- the current value I meas is measured, and the temperature inside the semiconductor chip 10 can be calculated from the current value I meas.
- the resistance value of the resistance component 45 of the measurement system can be calculated, and the measurement can be performed in consideration of the presence of the resistance component 45. ..
- the fourth embodiment is an example of the arrangement structure of the pad electrode to which the resistance element 31 is connected.
- FIG. 7 shows an example of the arrangement structure of the pad electrodes according to the fourth embodiment.
- pad electrode groups 17A and 17B composed of a set of pad electrodes used for input / output of various signals are provided at, for example, both ends in the row direction. It is provided. Then, the pad electrodes of these pad electrode groups 17A and 17B can be used as pad electrodes to which the resistance element 31 is connected.
- the two electrodes A and B at the ends of the pad electrode group 17A are used as the two pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected.
- the pad electrodes of the pad electrode group 17A are used as the two pad electrodes 32 _1 and 32 _2 , but the pad electrodes of the pad electrode group 17B may be used.
- the pad electrode is not limited to the pad electrode at the end of the pad electrode groups 17A and 17B, and the pad electrode at the intermediate portion may be used.
- the number of pad electrodes to which the resistance element 31 is connected is two, the number is not limited to two as long as the pad electrodes are electrically connected, and the number of pad electrodes is arbitrary.
- Example 5 is a modification of Example 4, in which the size of the two pad electrodes to which the resistance element is connected is larger than the size of the other pad electrodes.
- FIG. 8 shows an example of the arrangement structure of the pad electrodes according to the fifth embodiment.
- the sizes of the two pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected are set to the size of another pad electrode in the pad electrode group 17A, for example.
- the size is set larger than the size of the pad electrode 32 _3 to which a clock or the like is given from the outside of the chip.
- the two pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected can be larger than the sizes of the other pad electrodes.
- the resistance value of 32 _2 can be made lower than the resistance value of other pad electrodes.
- Example 6 is a modification of Example 4, in which the size of the two pad electrodes to which the resistance element 31 is connected is smaller than the size of the other pad electrodes.
- FIG. 9 shows an example of the arrangement structure of the pad electrodes according to the sixth embodiment.
- the sizes of the two pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected are set to the size of another pad electrode in the pad electrode group 17A, for example.
- the configuration is set to be smaller than the size of the pad electrode 32 _3 to which a clock or the like is given from the outside of the chip.
- the two pad electrodes 32 in the forming region of the pad electrode group 17A are formed.
- the area occupied by _1 and 32 _2 can be compressed.
- the seventh embodiment is a modification of the fourth embodiment, and is an example in which two pad electrodes to which a resistance element is connected are arranged so as to sandwich another pad electrode.
- FIG. 10 shows an example of the arrangement structure of the pad electrodes according to the seventh embodiment.
- the two pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected are connected to another pad electrode in the pad electrode group 17A, for example, two. It is configured so that the pad electrodes 32 _4 and 32 _5 are sandwiched between them.
- the two pad electrodes 32 _1 and 32 _2 are located between the two pad electrodes 32 _1 and 32 _2. Since the distance can be increased, it is possible to measure the temperature in a wide range as compared with the case where the temperature is provided adjacent to each other.
- the number of pad electrodes sandwiched between the two pad electrodes 32 _1 and 32 _2 is set to two, but this is an example and is not limited to two.
- Example 8 is a modification of Example 4, and is an example in which each of the two pad electrodes to which the resistance element is connected is composed of a plurality of pad electrodes.
- FIG. 11 shows an example of the arrangement structure of the pad electrodes according to the eighth embodiment.
- the two pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected are adjacent to each other in the pad electrode group 17A and are adjacent to each other. It is composed of a plurality of electrically connected pad electrodes.
- the pad electrode group 17A two pad electrodes (32 _1 , 32 _2 ) to which the pad electrode 32 _1 and the pad electrode 32 _4 adjacent to each other are electrically connected and the resistance element 31 is connected are connected. Used as one. Further, the pad electrode 32 _2 and the pad electrode 32 _5 adjacent to each other are electrically connected and used as the other of the two pad electrodes to which the resistance element 31 is connected.
- each of the two pad electrodes to which the resistance element 31 is connected is composed of two pad electrodes that are adjacent to each other in the pad electrode group 17A and are electrically connected to each other.
- the number of pad electrodes is arbitrary, not limited to.
- each of the two pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected is composed of a plurality of pad electrodes, it is equivalent to expanding the size of each electrode.
- the resistance values of the two pad electrodes 32 _1 and 32 _2 can be lowered as compared with the case where the two pad electrodes 32 _1 and 32 _2 are composed of one pad electrode. Further, by increasing the number of pad electrodes, it is possible to cancel the influence of the conductor resistance other than the resistance element 31, so that the accuracy of temperature measurement can be improved.
- the ninth embodiment is a modification of the eighth embodiment, and is an example in which the number of pad electrodes to which the resistance element is connected is three or more.
- FIG. 12 shows an example of the arrangement structure of the pad electrodes according to the ninth embodiment.
- the number of pad electrodes to which the resistance element 31 is connected is three or more, for example, the pad electrode 32 _1 , the pad electrode 32 _2 , and the pad. It is composed of three electrodes 32 _6.
- "equally” means not only a case of exactly equality but also a case of substantially equality, and the existence of various variations caused in design or manufacturing is allowed.
- the wire length, the wire material, the wire diameter, and the electric resistance of the wiring electrically connected to the resistance element 31 By making the values equal to each other, the influence of the conductor resistance can be canceled, so that the accuracy of temperature measurement can be improved.
- Example 10 is an application example of two pad electrodes to which a resistance element is connected.
- the temperature of the semiconductor chip 10 of the CMOS image sensor 1 is measured for the two pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected in order to improve the measurement accuracy of the temperature sensor 16.
- the case where a dedicated pad electrode is used has been described.
- Example 10 application examples of the two pad electrodes 32 _1 and 32 _2 other than the pad electrodes dedicated to temperature measurement will be described.
- the arrangement structure of the pad electrodes according to the application example (No. 1) is shown in FIG. 13A, and the arrangement structure of the pad electrodes according to the application example (No. 2) is shown in FIG. 13B.
- the application example (No. 1) shown in FIG. 13A is an example in which the resistance element 31 and the two pad electrodes 32 _1 and 32 _2 are used as an overheating detector.
- the analog-to-digital converter 50 (see FIG. 1) provided in the column processing unit 13 (see FIG. 1) in the semiconductor chip 10 with the wiring connecting the two pad electrodes 32 _1 and 32 _2 and the resistance element 31 (see FIG. 1). Connect to 50 _1 , 50 _2). Then, in the analog-digital converters 50 _1 and 50 _2 , the voltage between both ends of the resistance element 31 when a current is passed through the two pad electrodes 32 _1 and 32 _2 is processed, so that the voltage in the semiconductor chip 10 is increased. Heating can be detected.
- the application example (No. 2) shown in FIG. 13B is an example in which the switches 52 elements _1 and 52 _2 are connected between the two pad electrodes 32 _1 and 32 _2 and the resistance element 31.
- the switches 52 elements _1 and 52 _2 consisting of CMOS switches, between the two pad electrodes 32 _1 and 32 _2.
- the penetration current can be eliminated. If the two pad electrodes 32 _1 and 32 _2 are treated as a power supply or ground (GND) during normal driving, the power supply impedance is lowered, which leads to an improvement in the imaging characteristics of the CMOS image sensor 1.
- the lower end portion of the pad electrode group 17A among the pad electrode groups 17A and 17B is used as the two pad electrodes 32 _1 and 32 _2 for temperature measurement to which the resistance element 31 is connected.
- the two pad electrodes A and B are used, the number and location of the pad electrodes for temperature measurement are not particularly limited.
- the pad electrode of the upper end portion X of the pad electrode group 17A may be used, or each pad electrode of the upper end portion Y / lower end portion Z of the pad electrode group 17B may be used. It may be used, or a combination thereof may be used.
- the semiconductor chip structure of the CMOS image sensor 1 may be a flat structure or a laminated structure.
- a case where the semiconductor chip structure of the CMOS image sensor 1 has a laminated structure will be described.
- FIG. 15 is an exploded perspective view showing a semiconductor chip structure having a laminated structure.
- the semiconductor chip 10 of the CMOS image sensor 1 has, for example, a laminated structure in which the first semiconductor chip 10A and the second semiconductor chip 10B are laminated.
- the first semiconductor chip 10A is used as an upper chip
- the second semiconductor chip 10B is used as a lower chip.
- the first semiconductor chip 10A is formed with a pixel array portion 11 in which the pixels 20 are arranged in a matrix
- the second semiconductor chip 10B is formed with a peripheral circuit portion of the pixel array portion 11.
- the laminated structure of two semiconductor chips of the first semiconductor chip 10A and the second semiconductor chip 10B is used, but a laminated structure of three or more semiconductor chips is also possible.
- the pad electrode groups 17A and 17B are also provided at both ends in the column direction. It has a provided configuration.
- the pad electrode group 17A consists of the pad electrode group 17A _1 on the upper chip side and the pad electrode group 17A _2 on the lower chip side
- the pad electrode group 17B consists of the pad electrode group 17B _1 on the upper chip side and the pad electrode group on the lower chip side. It consists of the group 17B _2.
- the pad electrode group 17C is composed of the pad electrode group 17C _1 on the upper chip side and the pad electrode group 17C _2 on the lower chip side
- the pad electrode group 17D is the pad electrode group 17D _1 on the upper chip side and the lower chip side. consisting of the pad electrodes 17D _2.
- the resistance element 31 for temperature measurement is provided on the first semiconductor chip 10A, which is the upper chip.
- the two pad electrodes 32 _1 and 32 _2 are provided on the second semiconductor chip 10B, which is the lower chip. Specifically, as the two pad electrodes 32 _1 and 32 _2 , the two pad electrodes A and B at the ends of the pad electrode group 17D _2 on the lower chip side are used.
- FIG. 15 illustrates a connection method using a through chip via (TCV) 53 as a connection portion 10C for electrically connecting the resistance element 31 and the two pad electrodes 32 _1 and 32 _2.
- TCV through chip via
- the connection method of the connection unit 10C exemplified here is an example, and is not limited to this.
- a metal-metal bond including a Cu-Cu bond can be exemplified.
- the resistance element 31 is provided on the first semiconductor chip 10A, so that the pixels 20 are arranged in a matrix.
- the pixel array portion 11 arranged in a shape is formed, and the temperature of the first semiconductor chip 10A can be measured.
- the temperature compensation system according to the second embodiment of the present disclosure measures the temperature measured by the semiconductor device according to the first embodiment having the above configuration, that is, the temperature sensor 16 mounted on the semiconductor chip 10 of the CMOS image sensor 1. It is a correction system.
- FIG. 16 shows an example of the system configuration of the temperature compensation system according to the second embodiment of the present disclosure.
- the temperature compensation system is configured to include a temperature measuring unit 60 in addition to the CMOS image sensor 1 having the above configuration in which the temperature sensor 16 is mounted on the semiconductor chip 10. ..
- the temperature measuring unit 60 applies a constant electric signal (constant voltage or constant current) between the pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected, and the semiconductor chip 10
- the actual temperature of the semiconductor chip 10 is measured by measuring the current or voltage proportional to the actual temperature of the semiconductor chip 10.
- the temperature measuring unit 60 calculates the actual temperature of the semiconductor chip 10 from the current value flowing through the resistance element 31 when a constant voltage is applied to the resistance element 31, or causes a constant current to flow through the resistance element 31.
- the actual temperature of the semiconductor chip 10 is calculated from the voltage values across the resistance element 31 at that time.
- the temperature information measured by the temperature sensor 16 is supplied to the logic circuit unit 14 via the analog-digital converter 50 provided in the column processing unit 13.
- the analog-to-digital converter 50 includes a single-slope analog-to-digital converter, which is an example of a reference signal comparison type analog-to-digital converter, a sequential comparison type analog-to-digital converter, and a delta-sigma modulation type ( ⁇ ).
- a modulation type) analog-to-digital converter or the like can be used.
- the single-slope analog-to-digital converter 50 has, for example, a reference signal generation unit 501, a comparator 502, and a counter 503.
- the reference signal generation unit 501 is composed of, for example, a digital-to-analog conversion (DAC) circuit, and a so-called ramp wave reference signal whose level (voltage) decreases monotonically with the passage of time is used for analog-to-digital conversion. Generated as a reference signal.
- DAC digital-to-analog conversion
- the comparator 502 uses an analog pixel signal read from the pixel 20 as a comparison input and a reference signal generated by the reference signal generation unit 501 as a reference input, and compares both signals. Then, the comparator 502 is in the first state (for example, high level) when the reference signal is larger than the pixel signal, and the output is in the second state (for example) when the reference signal is equal to or less than the pixel signal. , Low level). As a result, the comparator 502 outputs a pulse signal having a pulse width corresponding to the magnitude of the signal level of the pixel signal as a comparison result.
- a clock signal is given to the counter 503 from the timing control unit 15 at the same timing as the supply start timing of the reference signal to the comparator 502. Then, the counter 503 measures the period of the pulse width of the output pulse of the comparator 502, that is, the period from the start of the comparison operation to the end of the comparison operation by performing the counting operation in synchronization with the clock signal.
- the count result (count value) of the comparator 502 becomes a digital value obtained by digitizing an analog pixel signal.
- the temperature information measured by the temperature sensor 16 is supplied to the logic circuit unit 14 via the single slope type analog-digital converter 50 having the above configuration.
- the logic circuit unit 14 is composed of a signal processing unit 141, a temperature compensation unit 142, and the like.
- the signal processing unit 141 executes predetermined signal processing on the pixel signal read from each pixel 20 of the pixel array unit 11 through the column processing unit 13, and outputs the signal through the pad electrode 32_13.
- the temperature correction unit 142 corrects the individual variation of the device by correcting the temperature measured by the temperature sensor 16 given through the single slope type analog-digital converter 50. At the time of this temperature correction, in order not to be affected by the temperature variation in the wafer surface, it is necessary to measure the temperature for each semiconductor chip 10 and perform the temperature correction of the temperature sensor for each semiconductor chip 10. ..
- a constant electric signal (constant voltage or constant current) is applied between the pad electrodes 32 _1 and 32 _2 to which the resistance element 31 is connected by the temperature measuring unit 60.
- the actual temperature of the semiconductor chip 10 is measured by measuring a current or a voltage proportional to the actual temperature of the semiconductor chip 10.
- the temperature information of the semiconductor chip 10 measured by the temperature measuring unit 60 is given to the temperature compensating unit 142 through the pad electrode 32_11.
- the temperature correction unit 142 corrects the temperature measured by the temperature sensor 16 based on the temperature of the semiconductor chip 10 measured by the temperature measurement unit 60.
- the temperature information measured by the temperature sensor 16 and corrected by the temperature correction unit 142 is output to the outside of the semiconductor chip 10 through the pad electrodes 32 _12.
- an impedance element provided for each semiconductor chip 10 (in this example, the actual temperature is measured for each semiconductor chip 10 using the resistance element 31 and reflected in the correction of the measured temperature by the temperature sensor 16).
- the temperature of the temperature sensor 16 can be corrected for each semiconductor chip 10 without being affected by the temperature variation in the wafer surface.
- the temperature measured by the semiconductor device according to the first embodiment of the above configuration that is, the temperature sensor 16 mounted on the semiconductor chip 10 of the CMOS image sensor 1 is abnormal. It is a system that issues an alarm in the case of temperature.
- FIG. 17 shows an example of the system configuration of the alarm system according to the third embodiment of the present disclosure.
- the alarm system according to the third embodiment of the present disclosure is a CMOS image including a temperature compensation system according to the second embodiment, which has a temperature measuring unit 60 outside the semiconductor chip 10 and a temperature compensation unit 142 inside the semiconductor chip 10.
- the configuration includes an alarm unit 70 that detects that the corrected temperature measured by the temperature sensor 16 exceeds a predetermined reference temperature and issues an alarm.
- the alarm unit 70 is, for example, measured by the temperature sensor 16 and corrected by the temperature correction unit 142, and output through the pad electrode 32 _12.
- a predetermined reference temperature for example, the upper limit temperature of the system
- an alarm for notifying the occurrence of an abnormality is issued.
- a visual method alarm display by a display
- an auditory method alarm sound
- a method in which both are used in combination can be exemplified.
- the technology according to the present disclosure can be applied to various products.
- the technology according to the present disclosure is any kind of movement such as an automobile, an electric vehicle, a hybrid electric vehicle, a motorcycle, a bicycle, a personal mobility, an airplane, a drone, a ship, a robot, a construction machine, and an agricultural machine (tractor). It may be realized as an image pickup device mounted on a body.
- FIG. 18 is a block diagram showing a schematic configuration example of a vehicle control system, which is an example of a mobile control system to which the technique according to the present disclosure can be applied.
- the vehicle control system 12000 includes a plurality of electronic control units connected via the communication network 12001.
- the vehicle control system 12000 includes a drive system control unit 12010, a body system control unit 12020, an outside information detection unit 12030, an in-vehicle information detection unit 12040, and an integrated control unit 12050.
- a microcomputer 12051, an audio image output unit 12052, and an in-vehicle network I / F (interface) 12053 are shown as a functional configuration of the integrated control unit 12050.
- the drive system control unit 12010 controls the operation of the device related to the drive system of the vehicle according to various programs.
- the drive system control unit 12010 has a driving force generator for generating a driving force of a vehicle such as an internal combustion engine or a driving motor, a driving force transmission mechanism for transmitting the driving force to the wheels, and a steering angle of the vehicle. It functions as a control device such as a steering mechanism for adjusting and a braking device for generating braking force of the vehicle.
- the body system control unit 12020 controls the operation of various devices mounted on the vehicle body according to various programs.
- the body system control unit 12020 functions as a keyless entry system, a smart key system, a power window device, or a control device for various lamps such as headlamps, back lamps, brake lamps, turn signals or fog lamps.
- the body system control unit 12020 may be input with radio waves transmitted from a portable device that substitutes for the key or signals of various switches.
- the body system control unit 12020 receives inputs of these radio waves or signals and controls a vehicle door lock device, a power window device, a lamp, and the like.
- the outside information detection unit 12030 detects information outside the vehicle equipped with the vehicle control system 12000.
- the image pickup unit 12031 is connected to the vehicle outside information detection unit 12030.
- the vehicle outside information detection unit 12030 causes the image pickup unit 12031 to capture an image of the outside of the vehicle and receives the captured image.
- the vehicle outside information detection unit 12030 may perform object detection processing or distance detection processing such as a person, a vehicle, an obstacle, a sign, or a character on the road surface based on the received image.
- the image pickup unit 12031 is an optical sensor that receives light and outputs an electric signal according to the amount of the light received.
- the image pickup unit 12031 can output an electric signal as an image or can output it as distance measurement information. Further, the light received by the image pickup unit 12031 may be visible light or invisible light such as infrared light.
- the in-vehicle information detection unit 12040 detects the in-vehicle information.
- a driver state detection unit 12041 that detects the state of the driver is connected to the in-vehicle information detection unit 12040.
- the driver state detection unit 12041 includes, for example, a camera that images the driver, and the in-vehicle information detection unit 12040 determines the degree of fatigue or concentration of the driver based on the detection information input from the driver state detection unit 12041. It may be calculated, or it may be determined whether the driver has fallen asleep.
- the microcomputer 12051 calculates the control target value of the driving force generator, the steering mechanism, or the braking device based on the information inside and outside the vehicle acquired by the vehicle exterior information detection unit 12030 or the vehicle interior information detection unit 12040, and the drive system control unit.
- a control command can be output to 12010.
- the microcomputer 12051 may include ADAS (Advanced Driver Ass) including vehicle collision avoidance or impact mitigation, follow-up driving based on inter-vehicle distance, vehicle speed maintenance driving, vehicle collision warning, vehicle lane deviation warning, and the like. Coordinated control can be performed for the purpose of realizing the function of the presence System).
- ADAS Advanced Driver Ass
- Coordinated control can be performed for the purpose of realizing the function of the presence System).
- the microcomputer 12051 controls the driving force generating device, the steering mechanism, the braking device, and the like based on the information around the vehicle acquired by the vehicle exterior information detection unit 12030 or the vehicle interior information detection unit 12040. It is possible to perform coordinated control for the purpose of automatic driving that runs autonomously without depending on the operation.
- the microcomputer 12051 can output a control command to the body system control unit 12020 based on the information outside the vehicle acquired by the vehicle outside information detection unit 12030.
- the microcomputer 12051 controls the headlamps according to the position of the preceding vehicle or the oncoming vehicle detected by the outside information detection unit 12030, and performs cooperative control for the purpose of anti-glare such as switching the high beam to the low beam. It can be carried out.
- the audio image output unit 12052 transmits an output signal of at least one of audio and image to an output device capable of visually or audibly notifying information to the passenger or the outside of the vehicle.
- an audio speaker 12061, a display unit 12062, and an instrument panel 12063 are exemplified as output devices.
- the display unit 12062 may include, for example, at least one of an onboard display and a head-up display.
- FIG. 19 is a diagram showing an example of the installation position of the image pickup unit 12031.
- the vehicle 12100 has an imaging unit 12101, 12102, 12103, 12104, 12105 as an imaging unit 12031.
- the image pickup units 12101, 12102, 12103, 12104, 12105 are provided, for example, at positions such as the front nose, side mirrors, rear bumpers, back doors, and the upper part of the windshield in the vehicle interior of the vehicle 12100.
- the image pickup unit 12101 provided in the front nose and the image pickup section 12105 provided in the upper part of the windshield in the vehicle interior mainly acquire an image in front of the vehicle 12100.
- the image pickup units 12102 and 12103 provided in the side mirror mainly acquire images of the side of the vehicle 12100.
- the image pickup unit 12104 provided in the rear bumper or the back door mainly acquires an image of the rear of the vehicle 12100.
- the images in front acquired by the image pickup units 12101 and 12105 are mainly used for detecting a preceding vehicle, a pedestrian, an obstacle, a traffic light, a traffic sign, a lane, or the like.
- FIG. 19 shows an example of the shooting range of the imaging units 12101 to 12104.
- the imaging range 12111 indicates the imaging range of the imaging unit 12101 provided on the front nose
- the imaging ranges 12112 and 12113 indicate the imaging range of the imaging units 12102 and 12103 provided on the side mirrors, respectively
- the imaging range 12114 indicates the imaging range.
- the imaging range of the imaging unit 12104 provided on the rear bumper or the back door is shown. For example, by superimposing the image data captured by the image pickup units 12101 to 12104, a bird's-eye view image of the vehicle 12100 can be obtained.
- At least one of the image pickup units 12101 to 12104 may have a function of acquiring distance information.
- at least one of the image pickup units 12101 to 12104 may be a stereo camera including a plurality of image pickup elements, or may be an image pickup element having pixels for phase difference detection.
- the microcomputer 12051 has a distance to each three-dimensional object in the image pickup range 12111 to 12114 based on the distance information obtained from the image pickup unit 12101 to 12104, and a temporal change of this distance (relative speed with respect to the vehicle 12100). By obtaining can. Further, the microcomputer 12051 can set an inter-vehicle distance to be secured in advance in front of the preceding vehicle, and can perform automatic brake control (including follow-up stop control), automatic acceleration control (including follow-up start control), and the like. In this way, it is possible to perform coordinated control for the purpose of automatic driving or the like in which the vehicle travels autonomously without depending on the operation of the driver.
- automatic brake control including follow-up stop control
- automatic acceleration control including follow-up start control
- the microcomputer 12051 converts three-dimensional object data related to a three-dimensional object into two-wheeled vehicles, ordinary vehicles, large vehicles, pedestrians, electric poles, and other three-dimensional objects based on the distance information obtained from the image pickup units 12101 to 12104. It can be classified and extracted and used for automatic avoidance of obstacles. For example, the microcomputer 12051 distinguishes obstacles around the vehicle 12100 into obstacles that are visible to the driver of the vehicle 12100 and obstacles that are difficult to see. Then, the microcomputer 12051 determines the collision risk indicating the risk of collision with each obstacle, and when the collision risk is equal to or higher than the set value and there is a possibility of collision, the microcomputer 12051 via the audio speaker 12061 or the display unit 12062. By outputting an alarm to the driver and performing forced deceleration and avoidance steering via the drive system control unit 12010, driving support for collision avoidance can be provided.
- At least one of the image pickup units 12101 to 12104 may be an infrared camera that detects infrared rays.
- the microcomputer 12051 can recognize a pedestrian by determining whether or not a pedestrian is present in the captured image of the imaging unit 12101 to 12104.
- pedestrian recognition is, for example, a procedure for extracting feature points in an image captured by an image pickup unit 12101 to 12104 as an infrared camera, and pattern matching processing is performed on a series of feature points indicating the outline of an object to determine whether or not the pedestrian is a pedestrian. It is done by the procedure to determine.
- the audio image output unit 12052 determines the square contour line for emphasizing the recognized pedestrian.
- the display unit 12062 is controlled so as to superimpose and display. Further, the audio image output unit 12052 may control the display unit 12062 so as to display an icon or the like indicating a pedestrian at a desired position.
- the above is an example of a vehicle control system to which the technology according to the present disclosure can be applied.
- the CMOS image sensor according to the first embodiment in which the temperature sensor 16 is mounted on the semiconductor chip 10 can be used as the image pickup unit 12031.
- the CMOS image sensor mounted on the vehicle is equipped with a temperature sensor 16 inside the device in order to stop the function when the system reaches the upper limit temperature.
- a high measurement accuracy of ⁇ 1 degree is required for the temperature sensor 16. Therefore, by providing the temperature compensation system according to the second embodiment, it is possible to maintain high measurement accuracy of the temperature sensor 16. Further, by providing the alarm according to the third embodiment, it is possible to issue an alarm in order to maintain the safety performance when an abnormality occurs such as the system reaching the upper limit temperature.
- the present disclosure may also have the following configuration.
- A. Semiconductor device ⁇ [A-1] Semiconductor chip, Multiple pad electrodes formed in the semiconductor chip, and An impedance element, which is electrically connected between at least two pad electrodes of a plurality of pad electrodes, is provided.
- a semiconductor device capable of measuring the temperature of a semiconductor chip by applying a constant electric signal between at least two pad electrodes to which an impedance element is connected from the outside of the semiconductor chip.
- the impedance element is a temperature-dependent element.
- A-3] The impedance element is a resistance element.
- [A-4] The semiconductor chip is equipped with a temperature sensor that measures the temperature inside the device.
- the semiconductor device according to any one of the above [A-1] to the above [A-3].
- [A-5] The size of at least two pad electrodes to which the impedance element is connected is larger than the size of the other pad electrodes.
- the semiconductor device according to any one of the above [A-1] to the above [A-4].
- [A-6] The size of at least two pad electrodes to which the impedance element is connected is smaller than the size of the other pad electrodes.
- the semiconductor device according to any one of the above [A-1] to the above [A-4].
- [A-7] At least two pad electrodes to which an impedance element is connected are provided so as to sandwich another pad electrode.
- the semiconductor device according to any one of the above [A-1] to the above [A-4].
- At least two pad electrodes to which an impedance element is connected are each composed of a plurality of pad electrodes electrically connected to each other.
- the number of pad electrodes to which the impedance element is connected is 3 or more.
- the wiring for electrically connecting the three or more pad electrodes and the impedance element is such that the conductor length, the conductor material, the wire diameter, and the electrical resistance are the same.
- the semiconductor device is an image pickup device having a semiconductor chip having a laminated structure in which a first semiconductor chip and a second semiconductor chip are laminated and electrically connected to each other.
- the first semiconductor chip is formed with a pixel array portion in which pixels are arranged.
- a peripheral circuit portion of the pixel array portion is formed on the second semiconductor chip.
- the impedance element is provided on the first semiconductor chip and is provided. At least two pad electrodes to which the impedance element is connected are provided on the second semiconductor chip.
- Temperature compensation system ⁇ [B-1] A semiconductor device having a semiconductor chip equipped with a temperature sensor, A temperature measuring unit that measures the temperature of a semiconductor chip, and Temperature compensator that corrects the temperature measured by the temperature sensor, Equipped with The semiconductor device has a plurality of pad electrodes formed in a semiconductor chip, and an impedance element electrically connected between at least two pad electrodes of the plurality of pad electrodes.
- the temperature measuring unit measures the temperature of the semiconductor chip by giving a constant electric signal between at least two pad electrodes to which the impedance element is connected from the outside of the semiconductor chip.
- the temperature compensator corrects the temperature measured by the temperature sensor based on the temperature of the semiconductor chip measured by the temperature measuring unit. Temperature compensation system.
- the impedance element is a temperature-dependent element.
- the impedance element is a resistance element.
- the temperature measuring unit applies a constant voltage to the resistance element and calculates the temperature of the semiconductor chip from the current value flowing through the resistance element.
- [B-5] The temperature measuring unit applies a constant current to the resistance element and calculates the temperature of the semiconductor chip from the voltage values across the resistance element.
- a semiconductor device having a semiconductor chip equipped with a temperature sensor, Temperature measuring unit that measures the temperature of semiconductor chips, A temperature compensator that corrects the temperature measured by the temperature sensor, and Alarm section, Equipped with The semiconductor device has a plurality of pad electrodes formed in a semiconductor chip, and an impedance element electrically connected between at least two pad electrodes of the plurality of pad electrodes.
- the temperature measuring unit measures the temperature of the semiconductor chip by giving a constant electric signal between at least two pad electrodes to which the impedance element is connected from the outside of the semiconductor chip.
- the temperature compensator corrects the temperature measured by the temperature sensor based on the temperature of the semiconductor chip measured by the temperature measuring unit.
- the alarm unit issues an alarm when it detects that the temperature corrected by the temperature compensation unit exceeds a predetermined reference temperature.
- Alarm system. [C-2] The impedance element is a temperature-dependent element. The alarm system according to the above [C-1]. [C-3] The impedance element is a resistance element. The alarm system according to the above [C-2]. [C-4] The impedance element is a resistance element. The alarm system according to the above [C-3]. [C-5] The temperature measuring unit applies a constant voltage to the resistance element and calculates the temperature of the semiconductor chip from the current value flowing through the resistance element. The alarm system according to the above [C-4]. [C-6] The temperature measuring unit applies a constant current to the resistance element and calculates the temperature of the semiconductor chip from the voltage values across the resistance element. The alarm system according to the above [C-4].
- CMOS image sensor 10 ... semiconductor chip (semiconductor substrate), 11 ... pixel array unit, 12 ... row selection unit, 13 ... column processing unit, 14 ... logic circuit unit , 15 ... Timing control unit, 16 ... Temperature sensor, 20 ... Pixel, 21 ... Photodiode, 22 ... Transfer transistor, 23 ... Reset transistor, 24 ... Amplification transistor, 25 ... Selective transistor, 31 ... Resistance element, 32 _1 to 32 _6 ... Pad electrode, 33 (33 _1 , 33 _2 ) ... Prove needle, 50 ... Analog-digital converter, 60 ⁇ ⁇ ⁇ Temperature measurement unit, 70 ⁇ ⁇ ⁇ Alarm unit
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Abstract
Description
半導体チップ、
半導体チップ内に形成された複数のパッド電極、及び、
複数のパッド電極の少なくとも2つのパッド電極間に電気的に接続されたインピーダンス素子、を備える。そして、
半導体チップの外部から、インピーダンス素子が接続された少なくとも2つのパッド電極間に一定の電気信号が与えられることにより、半導体チップの温度測定が可能な構成となっている。
温度センサを搭載した半導体チップを有する半導体装置、
半導体チップの温度を測定する温度測定部、及び、
温度センサが計測した温度を補正する温度補正部、を備える。そして、
半導体装置は、半導体チップ内に形成された複数のパッド電極、及び、複数のパッド電極の少なくとも2つのパッド電極間に電気的に接続されたインピーダンス素子を有し、
温度測定部は、半導体チップの外部から、インピーダンス素子が接続された少なくとも2つのパッド電極間に一定の電気信号を与えることで、半導体チップの温度を測定し、
温度補正部は、温度測定部が測定した半導体チップの温度に基づいて、温度センサが計測した温度を補正する。
温度センサを搭載した半導体チップを有する半導体装置、
半導体チップの温度を測定する温度測定部、
温度センサが計測した温度を補正する温度補正部、及び、
アラーム部、
を備える。そして、
半導体装置は、半導体チップ内に形成された複数のパッド電極、及び、複数のパッド電極の少なくとも2つのパッド電極間に電気的に接続されたインピーダンス素子を有し、
温度測定部は、半導体チップの外部から、インピーダンス素子が接続された少なくとも2つのパッド電極間に一定の電気信号を与えることで、半導体チップの温度を測定し、
温度補正部は、温度測定部が測定した半導体チップの温度に基づいて、温度センサが計測した温度を補正し、
アラーム部は、温度補正部が補正した温度が、所定の基準温度を超えることを検知したとき警報を発する。
1.本開示の半導体装置、温度補正システム及びアラームシステム、全般に関する説明2.本開示に係る技術が適用される半導体装置(撮像装置の例)
2-1.CMOSイメージセンサの構成例
2-2.画素の構成例
2-3.チップ構造について
2-4.熱電対によるウエハ面内温度の測定について
3.第1実施形態(半導体装置の例)
3-1.実施例1(抵抗素子に一定の電圧を印加して温度を測定する例)
3-2.実施例2(抵抗素子に一定の電流を流して温度を測定する例)
3-3.実施例3(実施例1の変形例:測定系に基準の抵抗素子を設ける例)
3-4.実施例4(抵抗素子が接続されるパッド電極の配置構造の例)
3-5.実施例5(実施例4の変形例:抵抗素子が接続される2つのパッド電極のサイズが、他のパッド電極のサイズよりも大きい例)
3-6.実施例6(実施例4の変形例:抵抗素子が接続される2つのパッド電極のサイズが、他のパッド電極のサイズよりも小さい例)
3-7.実施例7(実施例4の変形例:抵抗素子が接続される2つのパッド電極を、他のパッド電極を挟んで配置した例)
3-8.実施例8(実施例4の変形例:抵抗素子が接続される2つのパッド電極のそれぞれを、複数のパッド電極で構成した例)
3-9.実施例9(実施例8の変形例:抵抗素子が接続されるパッド電極の個数を3個とした例)
3-10.実施例10(2つのパッド電極の応用例)
3-11.第1実施形態の変形例
3-12.積層構造の半導体チップ構造
4.第2実施形態(温度補正システムの例)
5.第3実施形態(アラームシステムの例)
6.本開示に係る技術の応用例(移動体への応用例)
7.本開示がとることができる構成
本開示の半導体装置、温度補正システム及びアラームシステムにあっては、インピーダンス素子について、温度依存性を持つ素子、好ましくは、抵抗素子である構成とすることができる。
本開示に係る技術が適用される半導体装置としては、撮像装置を例示することができる。ここでは、撮像装置として、X-Yアドレス方式の撮像装置の一種であるCMOS(Complementary Metal Oxide Semiconductor)イメージセンサを例に挙げて説明する。CMOSイメージセンサは、CMOSプロセスを応用して、又は、部分的に使用して作製されたイメージセンサである。
図1は、本開示の半導体装置の一例であるCMOSイメージセンサの基本的な構成の概略を示すシステム構成図である。
図2は、画素20の回路構成の一例を示す回路図である。画素20は、光電変換素子(受光素子)として、例えば、フォトダイオード21を有している。画素20は、フォトダイオード21の他に、転送トランジスタ22、リセットトランジスタ23、増幅トランジスタ24、及び、選択トランジスタ25を有する画素構成となっている。
上述したCMOSイメージセンサ1の半導体チップ構造は、図1から明らかなように、所謂、平置構造となっている。平置構造は、画素アレイ部11の周辺回路部、即ち、行選択部12、カラム処理部13、ロジック回路部14、及び、タイミング制御部15等を、画素20が配置されて成る画素アレイ部11と同じ半導体チップ(半導体基板)10に形成したチップ構造である。
ところで、CMOSイメージセンサに代表される撮像装置の用途としては、例えば、車両に搭載されて、車外の画像等を撮像する車載用のイメージセンサを例示することができる。但し、車載用のイメージセンサは一例であって、車載用の用途に限定されるものではない。
本開示の第1実施形態に係る半導体装置の一例である撮像装置、具体的には、デバイス内部の温度を計測するための温度センサ16をデバイス内部に搭載したCMOSイメージセンサ1は、デバイスを駆動しながら半導体チップ単位(以下、単に「チップ単位」と略記する場合がある)での実温度の把握(測定)を可能としている。
実施例1は、抵抗素子31に一定の電圧を印加して半導体チップ10の実温度を測定する例である。実施例1に係る温度測定の構成例を図5Aに示す。また、抵抗素子31に流れる電流値と温度TJとの関係の一例を図5Bに示す。但し、温度TJの上昇に応じて電流値が減少する図5Bの関係は一例であって、この関係に限定されるものではない。
実施例2は、抵抗素子31に一定の電流を流して半導体チップ10の実温度を測定する例である。実施例2に係る温度測定の構成例を図6Aに示す。
実施例3は、実施例1の変形例であり、測定系に基準の抵抗素子を設ける例である。実施例3に係る温度測定の構成例を図6Bに示す。
実施例4は、抵抗素子31が接続されるパッド電極の配置構造の例である。実施例4に係るパッド電極の配置構造の一例を図7に示す。
実施例5は、実施例4の変形例であり、抵抗素子が接続される2つのパッド電極のサイズが、他のパッド電極のサイズよりも大きい例である。実施例5に係るパッド電極の配置構造の一例を図8に示す。
実施例6は、実施例4の変形例であり、抵抗素子31が接続される2つのパッド電極のサイズが、他のパッド電極のサイズよりも小さい例である。実施例6に係るパッド電極の配置構造の一例を図9に示す。
実施例7は、実施例4の変形例であり、抵抗素子が接続される2つのパッド電極を、他のパッド電極を挟んで配置した例である。実施例7に係るパッド電極の配置構造の一例を図10に示す。
実施例8は、実施例4の変形例であり、抵抗素子が接続される2つのパッド電極のそれぞれを、複数のパッド電極で構成した例である。実施例8に係るパッド電極の配置構造の一例を図11に示す。
実施例9は、実施例8の変形例であり、抵抗素子が接続されるパッド電極の個数を3個以上とした例である。実施例9に係るパッド電極の配置構造の一例を図12に示す。
実施例10は、抵抗素子が接続される2つのパッド電極の応用例である。実施例1乃至実施例9では、抵抗素子31が接続される2つのパッド電極32_1,32_2について、温度センサ16の計測精度の向上のために、CMOSイメージセンサ1の半導体チップ10の温度測定専用のパッド電極とした場合について説明した。
以上、本開示に係る技術について、好ましい実施形態に基づき説明したが、本開示に係る技術は当該実施形態に限定されるものではない。上記の第1実施形態において説明した撮像装置の構成、構造は例示であり、適宜、変更することができる。
CMOSイメージセンサ1の半導体チップ構造としては、平置構造とすることもできるし、積層構造とすることもできる。ここで、CMOSイメージセンサ1の半導体チップ構造が、積層構造である場合について説明する。図15は、積層構造の半導体チップ構造を示す分解斜視図である。
本開示の第2実施形態に係る温度補正システムは、上記の構成の第1実施形態に係る半導体装置、即ち、CMOSイメージセンサ1の半導体チップ10に搭載されている温度センサ16が計測した温度を補正するシステムである。本開示の第2実施形態に係る温度補正システムのシステム構成の一例を図16に示す。
本開示の第3実施形態に係るアラームシステムは、上記の構成の第1実施形態に係る半導体装置、即ち、CMOSイメージセンサ1の半導体チップ10に搭載されている温度センサ16が計測した温度が異常温度の場合に警報を発するシステムである。本開示の第3実施形態に係るアラームシステムのシステム構成の一例を図17に示す。
本開示に係る技術(本技術)は、様々な製品へ応用することができる。例えば、本開示に係る技術は、自動車、電気自動車、ハイブリッド電気自動車、自動二輪車、自転車、パーソナルモビリティ、飛行機、ドローン、船舶、ロボット、建設機械、農業機械(トラクター)などのいずれかの種類の移動体に搭載される撮像装置として実現されてもよい。
図18は、本開示に係る技術が適用され得る移動体制御システムの一例である車両制御システムの概略的な構成例を示すブロック図である。
istance System)の機能実現を目的とした協調制御を行うことができる。
尚、本開示は、以下のような構成をとることもできる。
[A-1]半導体チップ、
半導体チップ内に形成された複数のパッド電極、及び、
複数のパッド電極の少なくとも2つのパッド電極間に電気的に接続されたインピーダンス素子、を備え、
半導体チップの外部から、インピーダンス素子が接続された少なくとも2つのパッド電極間に一定の電気信号が与えられることにより、半導体チップの温度測定が可能な構成となっている、半導体装置。
[A-2]インピーダンス素子は、温度依存性を持つ素子である、
上記[A-1]に記載の半導体装置。
[A-3]インピーダンス素子は、抵抗素子である、
上記[A-2]に記載の半導体装置。
[A-4]半導体チップには、デバイス内部の温度を測定する温度センサが搭載されている、
上記[A-1]乃至上記[A-3]のいずれかに記載の半導体装置。
[A-5]インピーダンス素子が接続された少なくとも2つのパッド電極のサイズは、他のパッド電極のサイズよりも大きい、
上記[A-1]乃至上記[A-4]のいずれかに記載の半導体装置。
[A-6]インピーダンス素子が接続された少なくとも2つのパッド電極のサイズは、他のパッド電極のサイズよりも小さい、
上記[A-1]乃至上記[A-4]のいずれかに記載の半導体装置。
[A-7]インピーダンス素子が接続された少なくとも2つのパッド電極は、他のパッド電極を挟んで設けられている、
上記[A-1]乃至上記[A-4]のいずれかに記載の半導体装置。
[A-8]インピーダンス素子が接続された少なくとも2つのパッド電極は、それぞれ、互いに電気的に接続された複数のパッド電極から成る、
上記[A-1]乃至上記[A-4]のいずれかに記載の半導体装置。
[A-9]インピーダンス素子が接続されるパッド電極の個数は、3個以上であり、
3個以上のパッド電極とインピーダンス素子とを電気的に接続する配線は、導線長、導線材質、線径、及び、電気抵抗が等しくなるような配線である、
上記[A-1]乃至上記[A-4]のいずれかに記載の半導体装置。
[A-10]半導体装置は、第1の半導体チップ及び第2の半導体チップが積層され、互いに電気的に接続された積層構造の半導体チップを有する撮像装置であり、
第1の半導体チップには、画素が配置されて成る画素アレイ部が形成され、
第2の半導体チップには、画素アレイ部の周辺回路部が形成されており、
インピーダンス素子は、第1の半導体チップに設けられ、
インピーダンス素子が接続される少なくとも2つのパッド電極は、第2の半導体チップに設けられている、
上記[A-1]乃至上記[A-9]のいずれかに記載の半導体装置。
[B-1]温度センサを搭載した半導体チップを有する半導体装置、
半導体チップの温度を測定する温度測定部、及び、
温度センサが計測した温度を補正する温度補正部、
を備え、
半導体装置は、半導体チップ内に形成された複数のパッド電極、及び、複数のパッド電極の少なくとも2つのパッド電極間に電気的に接続されたインピーダンス素子を有し、
温度測定部は、半導体チップの外部から、インピーダンス素子が接続された少なくとも2つのパッド電極間に一定の電気信号を与えることで、半導体チップの温度を測定し、
温度補正部は、温度測定部が測定した半導体チップの温度に基づいて、温度センサが計測した温度を補正する、
温度補正システム。
[B-2]インピーダンス素子は、温度依存性を持つ素子である、
上記[B-1]に記載の温度補正システム。
[B-3]インピーダンス素子は、抵抗素子である、
上記[B-2]に記載の温度補正システム。
[B-4]温度測定部は、抵抗素子に一定の電圧を印加し、抵抗素子に流れる電流値から半導体チップの温度を算出する、
上記[B-3]に記載の温度補正システム。
[B-5]温度測定部は、抵抗素子に一定の電流を流し、抵抗素子の両端の電圧値から半導体チップの温度を算出する、
上記[B-3]に記載の温度補正システム。
[C-1]温度センサを搭載した半導体チップを有する半導体装置、
半導体チップの温度を測定する温度測定部、
温度センサが計測した温度を補正する温度補正部、及び、
アラーム部、
を備え、
半導体装置は、半導体チップ内に形成された複数のパッド電極、及び、複数のパッド電極の少なくとも2つのパッド電極間に電気的に接続されたインピーダンス素子を有し、
温度測定部は、半導体チップの外部から、インピーダンス素子が接続された少なくとも2つのパッド電極間に一定の電気信号を与えることで、半導体チップの温度を測定し、
温度補正部は、温度測定部が測定した半導体チップの温度に基づいて、温度センサが計測した温度を補正し、
アラーム部は、温度補正部が補正した温度が、所定の基準温度を超えることを検知したとき警報を発する、
アラームシステム。
[C-2]インピーダンス素子は、温度依存性を持つ素子である、
上記[C-1]に記載のアラームシステム。
[C-3]インピーダンス素子は、抵抗素子である、
上記[C-2]に記載のアラームシステム。
[C-4]インピーダンス素子は、抵抗素子である、
上記[C-3]に記載のアラームシステム。
[C-5]温度測定部は、抵抗素子に一定の電圧を印加し、抵抗素子に流れる電流値から半導体チップの温度を算出する、
上記[C-4]に記載のアラームシステム。
[C-6]温度測定部は、抵抗素子に一定の電流を流し、抵抗素子の両端の電圧値から半導体チップの温度を算出する、
上記[C-4]に記載のアラームシステム。
Claims (20)
- 半導体チップ、
半導体チップ内に形成された複数のパッド電極、及び、
複数のパッド電極の少なくとも2つのパッド電極間に電気的に接続されたインピーダンス素子、
を備え、
半導体チップの外部から、インピーダンス素子が接続された少なくとも2つのパッド電極間に一定の電気信号が与えられることにより、半導体チップの温度測定が可能な構成となっている、
半導体装置。 - インピーダンス素子は、温度依存性を持つ素子である、
請求項1に記載の半導体装置。 - インピーダンス素子は、抵抗素子である、
請求項2に記載の半導体装置。 - 半導体チップには、デバイス内部の温度を測定する温度センサが搭載されている、
請求項1に記載の半導体装置。 - インピーダンス素子が接続された少なくとも2つのパッド電極のサイズは、他のパッド電極のサイズよりも大きい、
請求項1に記載の半導体装置。 - インピーダンス素子が接続された少なくとも2つのパッド電極のサイズは、他のパッド電極のサイズよりも小さい、
請求項1に記載の半導体装置。 - インピーダンス素子が接続された少なくとも2つのパッド電極は、他のパッド電極を挟んで設けられている、
請求項1に記載の半導体装置。 - インピーダンス素子が接続された少なくとも2つのパッド電極は、それぞれ、互いに隣接し、且つ、電気的に接続された複数のパッド電極から成る、
請求項1に記載の半導体装置。 - インピーダンス素子が接続されるパッド電極の個数は、3個以上であり、
3個以上のパッド電極とインピーダンス素子とを電気的に接続する配線は、導線長、導線材質、線径、及び、電気抵抗が等しくなるような配線である、
請求項1に記載の半導体装置。 - 半導体装置は、第1の半導体チップ及び第2の半導体チップが積層され、互いに電気的に接続された積層構造の半導体チップを有する撮像装置であり、
第1の半導体チップには、画素が配置されて成る画素アレイ部が形成され、
第2の半導体チップには、画素アレイ部の周辺回路部が形成されており、
インピーダンス素子は、第1の半導体チップに設けられ、
インピーダンス素子が接続される少なくとも2つのパッド電極は、第2の半導体チップに設けられている、
請求項1に記載の半導体装置。 - 温度センサを搭載した半導体チップを有する半導体装置、
半導体チップの温度を測定する温度測定部、及び、
温度センサが計測した温度を補正する温度補正部、
を備え、
半導体装置は、半導体チップ内に形成された複数のパッド電極、及び、複数のパッド電極の少なくとも2つのパッド電極間に電気的に接続されたインピーダンス素子を有し、
温度測定部は、半導体チップの外部から、インピーダンス素子が接続された少なくとも2つのパッド電極間に一定の電気信号を与えることで、半導体チップの温度を測定し、
温度補正部は、温度測定部が測定した半導体チップの温度に基づいて、温度センサが計測した温度を補正する、
温度補正システム。 - インピーダンス素子は、温度依存性を持つ素子である、
請求項11に記載の温度補正システム。 - インピーダンス素子は、抵抗素子である、
請求項12に記載の温度補正システム。 - 温度測定部は、抵抗素子に一定の電圧を印加し、抵抗素子に流れる電流値から半導体チップの温度を算出する、
請求項13に記載の温度補正システム。 - 温度測定部は、抵抗素子に一定の電流を流し、抵抗素子の両端の電圧値から半導体チップの温度を算出する、
請求項13に記載の温度補正システム。 - 温度センサを搭載した半導体チップを有する半導体装置、
半導体チップの温度を測定する温度測定部、
温度センサが計測した温度を補正する温度補正部、及び、
アラーム部、
を備え、
半導体装置は、半導体チップ内に形成された複数のパッド電極、及び、複数のパッド電極の少なくとも2つのパッド電極間に電気的に接続されたインピーダンス素子を有し、
温度測定部は、半導体チップの外部から、インピーダンス素子が接続された少なくとも2つのパッド電極間に一定の電気信号を与えることで、半導体チップの温度を測定し、
温度補正部は、温度測定部が測定した半導体チップの温度に基づいて、温度センサが計測した温度を補正し、
アラーム部は、温度補正部が補正した温度が、所定の基準温度を超えることを検知したとき警報を発する、
アラームシステム。 - インピーダンス素子は、温度依存性を持つ素子である、
請求項16に記載の温度補正システム。 - インピーダンス素子は、抵抗素子である、
請求項17に記載の温度補正システム。 - 温度測定部は、抵抗素子に一定の電圧を印加し、抵抗素子に流れる電流値から半導体チップの温度を算出する、
請求項18に記載の温度補正システム。 - 温度測定部は、抵抗素子に一定の電流を流し、抵抗素子の両端の電圧値から半導体チップの温度を算出する、
請求項18に記載の温度補正システム。
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JPH05235253A (ja) * | 1992-02-21 | 1993-09-10 | Nec Eng Ltd | 半導体素子 |
JP2011086742A (ja) * | 2009-10-15 | 2011-04-28 | Renesas Electronics Corp | 半導体装置 |
JP2015002229A (ja) * | 2013-06-14 | 2015-01-05 | ルネサスエレクトロニクス株式会社 | 半導体装置および電子装置 |
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JPH05235253A (ja) * | 1992-02-21 | 1993-09-10 | Nec Eng Ltd | 半導体素子 |
JP2011086742A (ja) * | 2009-10-15 | 2011-04-28 | Renesas Electronics Corp | 半導体装置 |
JP2015002229A (ja) * | 2013-06-14 | 2015-01-05 | ルネサスエレクトロニクス株式会社 | 半導体装置および電子装置 |
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