WO2014132482A1 - 半導体光検出装置 - Google Patents
半導体光検出装置 Download PDFInfo
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- WO2014132482A1 WO2014132482A1 PCT/JP2013/078221 JP2013078221W WO2014132482A1 WO 2014132482 A1 WO2014132482 A1 WO 2014132482A1 JP 2013078221 W JP2013078221 W JP 2013078221W WO 2014132482 A1 WO2014132482 A1 WO 2014132482A1
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 203
- 239000004020 conductor Substances 0.000 claims description 54
- 229910000679 solder Inorganic materials 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 33
- 230000004048 modification Effects 0.000 description 21
- 238000012986 modification Methods 0.000 description 21
- 230000008602 contraction Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910017944 Ag—Cu Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PQIJHIWFHSVPMH-UHFFFAOYSA-N [Cu].[Ag].[Sn] Chemical compound [Cu].[Ag].[Sn] PQIJHIWFHSVPMH-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000969 tin-silver-copper Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
- H01L27/14636—Interconnect structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/10—Bump connectors ; Manufacturing methods related thereto
- H01L24/12—Structure, shape, material or disposition of the bump connectors prior to the connecting process
- H01L24/14—Structure, shape, material or disposition of the bump connectors prior to the connecting process of a plurality of bump connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49838—Geometry or layout
Definitions
- the present invention relates to a semiconductor photodetection device including a plurality of semiconductor photodetection elements.
- a semiconductor photodetection device comprising a base, a plurality of semiconductor photodetecting elements disposed on the base, and a plurality of bump electrodes that electrically and mechanically connect the base and each semiconductor photodetecting element is known.
- the plurality of semiconductor photodetector elements have a planar shape having a pair of first sides facing each other in the first direction and a pair of second sides facing each other in the second direction orthogonal to the first direction. .
- the plurality of semiconductor photodetecting elements are arranged next to each other in a lined state on the base.
- the semiconductor photodetector described in Patent Document 1 may cause the following problems.
- the base and the plurality of semiconductor photodetecting elements are mechanically connected to each other by curing the plurality of bump electrodes. At this time, the position of each semiconductor photodetection element may be shifted due to factors such as the shrinkage of the bump electrode that occurs when the bump electrode is cured.
- the plurality of conductor pads to which the corresponding bump electrodes are connected shorten the wiring to the conductor pads, In order to reduce the wiring capacity, they are arranged on the pair of first sides. At this time, in order to further reduce the wiring capacity, the plurality of conductor pads may be arranged at a position relatively distant from the second side when viewed in the second direction.
- the positional deviation on the second side of the semiconductor photodetecting element is enlarged when the bump electrodes contract. There is a fear to do.
- An object of the present invention is to provide a semiconductor photodetection device in which a plurality of semiconductor photodetection elements are arranged with high positional accuracy.
- a semiconductor photodetection device includes a base, a pair of first sides facing each other in the first direction, and a second direction shorter than the pair of first sides and orthogonal to the first direction.
- a plurality of semiconductor photodetecting elements that are arranged on the base and are adjacent to each other in a planar shape having a pair of second sides that face each other, and a pair of first sides of each semiconductor photodetecting element
- a plurality of bump electrodes electrically and mechanically connected to the base and each semiconductor photodetecting element, and at least one each arranged on a pair of second sides of each semiconductor photodetecting element; And a plurality of dummy bumps for mechanically connecting the base and each semiconductor photodetecting element.
- At least one dummy bump is disposed on each of the pair of second sides of each semiconductor photodetector element. Even if misalignment occurs in each semiconductor photodetecting element due to factors such as contraction of a plurality of bump electrodes, misalignment occurs in each semiconductor photodetecting element because the dummy bumps are arranged on the pair of second sides. Can be suppressed. Therefore, a plurality of semiconductor photodetecting elements are arranged with high positional accuracy.
- the semiconductor photodetecting elements may be adjacent to each other in a state of being aligned in the first direction.
- misalignment may occur due to factors such as interference between the semiconductor photodetecting elements.
- the dummy bumps are respectively arranged on the pair of second sides, when the semiconductor photodetecting elements are arranged adjacent to each other in the first direction, interference between the semiconductor photodetecting elements, etc. Even if the semiconductor photodetection element is misaligned due to the above factors, the misalignment can be reliably suppressed.
- the plurality of dummy bumps may be arranged so as to straddle a plurality of adjacent semiconductor photodetecting elements.
- a plurality of dummy bumps can be shared between adjacent semiconductor photodetecting elements.
- the number of dummy bumps can be relatively small, and an increase in cost can be suppressed.
- At least one semiconductor photodetecting element is disposed on the side adjacent to each other so as to straddle each semiconductor photodetecting element, and the base and each semiconductor photodetecting element are A dummy bump that is mechanically connected may be further provided.
- a plurality of semiconductor light detection elements are arranged with higher positional accuracy.
- a semiconductor photodetector includes a base, a pair of first sides facing each other in the first direction, and a pair of second facing each other in a second direction orthogonal to the first direction. And a plurality of semiconductor photodetecting elements arranged on the substrate adjacent to each other in a state aligned in the first direction, and a pair of first side sides of each semiconductor photodetecting element A plurality of bump electrodes that are arranged and electrically and mechanically connect the base and each semiconductor light detection element, and each semiconductor light detection element on the first side adjacent to each other in the plurality of adjacent semiconductor light detection elements A plurality of dummy bumps are disposed so as to straddle and mechanically connect the base and each semiconductor photodetecting element.
- the plurality of dummy bumps are arranged so as to straddle each semiconductor photodetection element on the first side adjacent to each other in the plurality of adjacent semiconductor photodetection elements. Yes. Even if misalignment occurs in each semiconductor photodetecting element due to factors such as shrinkage of a plurality of bump electrodes, the dummy bumps are arranged so as to straddle each semiconductor photodetecting element on the first side, so that each semiconductor light It is possible to suppress the occurrence of displacement in the detection element. Therefore, a plurality of semiconductor photodetecting elements are arranged with high positional accuracy.
- the plurality of semiconductor photodetector elements may be provided with a plurality of conductor pads formed by the same manufacturing process and connected to the plurality of bump electrodes and the plurality of dummy bumps.
- the positional accuracy of the conductor pad to which the bump electrode is connected and the conductor pad to which the dummy bump is connected is extremely high. Therefore, a plurality of semiconductor photodetecting elements can be arranged with higher positional accuracy.
- the plurality of bump electrodes may be solder bumps, and the plurality of dummy bumps may be solder bumps having a lower melting point than the plurality of bump electrodes.
- the curing of the bump electrodes starts before the curing of the dummy bumps, but since the dummy bumps are in a melted state, the bump electrodes are cured in a state where the semiconductor photodetecting elements are aligned. Therefore, it is possible to further suppress the occurrence of positional deviation in each semiconductor photodetecting element.
- the plurality of dummy bumps may be smaller than the plurality of bump electrodes. Not only bump electrodes but also dummy bumps shrink when they are cured. However, since the dummy bump is smaller than the bump electrode, the contraction rate of the dummy bump is small, and the force acting on the semiconductor photodetecting element at the time of contraction is extremely small. Therefore, it is possible to reliably suppress the occurrence of positional deviation in each semiconductor light detection element.
- Each semiconductor photodetecting element may be a solid-state imaging element capable of acquiring a two-dimensional image having a second direction as a longitudinal direction and TDI driving.
- the present invention it is possible to provide a semiconductor photodetector device in which a plurality of semiconductor photodetector elements are arranged with high positional accuracy.
- FIG. 1 is a plan view showing the semiconductor photodetection device according to the first embodiment.
- FIG. 2 is a diagram for explaining a cross-sectional configuration of the semiconductor photodetection device according to the first embodiment.
- FIG. 3 is a plan view showing a semiconductor photodetector device according to a modification of the first embodiment.
- FIG. 4 is a plan view showing a semiconductor photodetector device according to a modification of the first embodiment.
- FIG. 5 is a plan view showing a semiconductor photodetector device according to a modification of the first embodiment.
- FIG. 6 is a plan view showing a semiconductor photodetector device according to a modification of the first embodiment.
- FIG. 1 is a plan view showing the semiconductor photodetection device according to the first embodiment.
- FIG. 2 is a diagram for explaining a cross-sectional configuration of the semiconductor photodetection device according to the first embodiment.
- FIG. 3 is a plan view showing a semiconductor photodetector device
- FIG. 7 is a plan view showing a semiconductor photodetector device according to a modification of the first embodiment.
- FIG. 8 is a plan view showing the semiconductor photodetection device according to the second embodiment.
- FIG. 9 is a diagram for explaining a cross-sectional configuration of the semiconductor photodetection device according to the second embodiment.
- FIG. 10 is a plan view showing a semiconductor photodetector device according to a modification of the first embodiment.
- FIG. 11 is a plan view showing a semiconductor photodetector device according to a modification of the second embodiment.
- FIG. 1 is a plan view showing the semiconductor photodetection device according to the first embodiment.
- FIG. 2 is a diagram for explaining a cross-sectional configuration of the semiconductor photodetection device according to the first embodiment.
- the semiconductor light detection device 1 includes a base 3 and a plurality of semiconductor light detection elements 10.
- the semiconductor photodetection device 1 includes two semiconductor photodetection elements 10.
- the substrate 3 is a substrate having main surfaces 3a and 3b facing each other. A plurality of conductor pads 5 and 7 are arranged on the main surface 3a.
- the main surface 3a is a surface on which the semiconductor light detection elements 10 are arranged. That is, each semiconductor light detection element 10 is disposed on the main surface 3 a of the base 3.
- Each semiconductor photodetecting element 10 has a main surface 10a and a main surface 10b facing each other.
- Each semiconductor photodetector 10 is provided with a photosensitive region 11 on the main surface 10a side.
- the photosensitive region 11 generates a charge according to incident light.
- Each semiconductor photodetecting element 10 includes a pair of first sides 13 facing each other in the first direction and a pair of second sides facing each other in a second direction shorter than the pair of first sides 13 and orthogonal to the first direction. It has a planar shape having sides 15.
- a rectangular shape is adopted as the planar shape. That is, each first side 13 corresponds to a long side, and each second side 15 corresponds to a short side. Therefore, the first direction is a direction parallel to the short side, and the second direction is a direction parallel to the long side.
- a BT (Back-illuminated Thinning) -CCD (Charge Coupled Device) is used as the semiconductor light detection element 10.
- the generated charge is transferred as a signal charge by the shift register, converted into a voltage corresponding to the signal charge, and output.
- the semiconductor photodetector 10 performs charge transfer in the first direction by a TDI (Time Delay Integration) operation. That is, the semiconductor photodetecting element 10 is a solid-state imaging element capable of acquiring a two-dimensional image having the second direction as a longitudinal direction and TDI driving.
- the semiconductor light detection device 1 semiconductor light detection element 10 images a subject that moves relatively in the first direction.
- Each semiconductor photodetecting element 10 is disposed on the base 3 so that the main surface 10b side is a light incident surface.
- the main surface 10a of the semiconductor photodetecting element 10 and the main surface 3a of the base 3 are opposed to each other.
- the semiconductor photodetecting elements 10 are positioned adjacent to each other on the main surface 3a of the base 3 in a state of being aligned in the first direction.
- Each semiconductor photodetecting element 10 includes a plurality of conductor pads 25 and 27, respectively. Each of the conductor pads 25 and 27 is disposed on the main surface 10a side of the semiconductor photodetector 10. Each conductor pad 25 is a conductor pad for inputting / outputting a signal to / from the semiconductor photodetector 10. Each conductor pad 27 is a conductor pad that does not contribute to input / output of a signal to / from the semiconductor photodetector 10. The conductor pad 27 is a so-called dummy pad. Each of the conductor pads 25 and 27 is formed on the main surface 10a side of the semiconductor photodetector 10 by the same manufacturing process.
- the plurality of conductor pads 25 are respectively arranged on the pair of first sides 13 of the semiconductor photodetecting element 10.
- the conductor pads 25 are juxtaposed along the first side 13 for each first side 13 side.
- the conductor pad 25 is disposed at a position relatively far from the second side 15 when viewed in the second direction.
- 18 (6 ⁇ 3) conductor pads 25 are provided for each first side 13 side.
- the plurality of conductor pads 27 are respectively disposed on the pair of second sides 15 of the semiconductor photodetecting element 10.
- the second side 15 side is juxtaposed along the second side 15.
- Each conductor pad 27 is arranged at a position corresponding to a rectangular corner.
- two conductor pads 27 are provided for each second side 15 side.
- the positions of the plurality of conductor pads 5 arranged on the base 3 are defined so as to correspond to the plurality of conductor pads 25 of the semiconductor photodetecting element 10.
- Each conductor pad 5 is a conductor pad for inputting / outputting a signal to / from the semiconductor photodetector 10.
- 72 (18 ⁇ 4) conductor pads 5 are provided on the base 3.
- the positions of the plurality of conductor pads 7 arranged on the substrate 3 are defined so as to correspond to the plurality of conductor pads 27 of the semiconductor photodetecting element 10.
- Each conductor pad 7 is a conductor pad that does not contribute to input / output of a signal to / from the semiconductor photodetector 10.
- the conductor pad 7 is a so-called dummy pad, like the conductor pad 27.
- 8 (4 ⁇ 2) conductor pads 7 are provided on the base 3.
- the semiconductor photodetection device 1 includes a plurality of bump electrodes 35 and a plurality of dummy bumps 37.
- Each semiconductor photodetecting element 10 is mounted on the substrate 3 by a plurality of bump electrodes 35 and dummy bumps 37, respectively. That is, each semiconductor photodetecting element 10 is mounted on the substrate 3 by flip chip bonding.
- Each bump electrode 35 electrically and mechanically connects the base 3 and each semiconductor photodetector 10.
- Each dummy bump 37 mechanically connects the base 3 and each semiconductor photodetecting element 10.
- solder bumps are used as the bump electrodes 35 and the plurality of dummy bumps 37.
- a tin-silver-copper alloy (Sn—Ag—Cu) solder can be used as the solder bump.
- bumps such as gold bumps, nickel bumps, or copper bumps can be used for the bump electrodes 35 and the plurality of dummy bumps 37.
- Each bump electrode 35 connects the conductor pad 5 and the conductor pad 25 corresponding to each other. That is, the plurality of bump electrodes 35 are disposed on the pair of first sides 13 of the semiconductor photodetector 10 corresponding to the conductor pads 25. The bump electrode 35 is juxtaposed along the first side 13 for each first side 13 side. The number of bump electrodes 35 is the same as the number of conductor pads 25 (conductor pads 5).
- Each dummy bump 37 connects the conductor pad 7 and the conductor pad 27 corresponding to each other. That is, the plurality of dummy bumps 37 are disposed on the pair of second sides 15 side of the semiconductor photodetector 10 corresponding to the conductor pads 27. The dummy bumps 37 are juxtaposed along the second side 15 for each second side 15 side. The number of dummy bumps 37 is the same as the number of conductor pads 27 (conductor pads 7). Each dummy bump 37 does not contribute to input / output of signals to / from the semiconductor photodetector 10.
- two dummy bumps 37 are arranged on each of the pair of second sides 15 of each semiconductor photodetector 10. Even if the semiconductor photodetecting elements 10 are likely to be displaced due to factors such as contraction of the plurality of bump electrodes 35, the dummy bumps 37 are disposed on the pair of second sides 15. It is possible to suppress the occurrence of misalignment. Therefore, the two semiconductor photodetecting elements 10 are arranged with high positional accuracy.
- the semiconductor photodetecting elements 10 are adjacent to each other in a state of being aligned in the first direction. In this case, misalignment may occur due to factors such as interference between the semiconductor photodetector elements 10. However, as described above, since the dummy bumps 37 are respectively arranged on the pair of second sides 15 side, misalignment is likely to occur in each semiconductor photodetector 10 due to factors such as interference between the semiconductor photodetectors 10. However, it is possible to reliably suppress the positional deviation.
- each conductor pad 25 and each conductor pad 27 are formed by the same manufacturing process. For this reason, the positional accuracy of the conductor pad 25 to which the bump electrode 35 is connected and the conductor pad 27 to which the dummy bump 37 is connected is extremely high. Therefore, each semiconductor photodetecting element 10 can be arranged with higher positional accuracy.
- each semiconductor photodetection element 10 is a solid-state image sensor capable of TDI drive, and a specific region of the subject is imaged by the same pixel row between the semiconductor photodetection elements 10. In this case, if a positional deviation occurs in each semiconductor light detection element 10, the specific area of the subject is imaged by different pixel rows between the semiconductor light detection elements 10. For this reason, the acquired image is blurred and the resolution is deteriorated.
- each semiconductor light detection element 10 is arranged with high positional accuracy in a state in which the positional deviation is suppressed, so that the acquired image is not blurred and the resolution is high. Will not deteriorate.
- FIGS. 3 to 7 are plan views showing a semiconductor photodetector device according to a modification of the first embodiment.
- each dummy bump 37 is disposed one by one for each pair of second sides 15.
- each dummy bump 37 is disposed at a position corresponding to a pair of corners located on a diagonal line in a rectangular shape.
- each dummy bump 37 is arranged one by one for each pair of second sides 15.
- each dummy bump 37 is disposed at a position corresponding to the central portion of the second side 15.
- each dummy bump 37 is arranged one for each second side 15 side, and two for each other second side 15 side.
- the dummy bump 37 disposed on the second side 15 side is disposed at a position corresponding to the central portion of the second side 15.
- Each dummy bump 37 disposed on the other second side 15 side is disposed at a position corresponding to a corner portion on the other second side 15 side of the rectangular shape.
- each dummy bump 37 is disposed so as to straddle the adjacent semiconductor light detection elements 10 for each pair of second sides 15. Also in the present modification, as in the first embodiment described above, it is possible to suppress the occurrence of positional deviation in each semiconductor photodetecting element 10, and the two semiconductor photodetecting elements 10 are arranged with high positional accuracy. Since the dummy bumps 37 can be shared by the adjacent semiconductor photodetecting elements 10, the number of dummy bumps 37 is relatively small. Thereby, the increase in cost can be suppressed. Also in this modification, although not shown, the respective conductor pads 7 and 27 to which the respective dummy bumps 37 are connected are also arranged at positions corresponding to the dummy bumps 37.
- the plurality of dummy bumps 37 are arranged not only on the pair of second sides 15 but on the first side 13 side.
- the two dummy bumps 37 are arranged on the first side 13 side so as to straddle the adjacent semiconductor light detection elements 10. According to this modification, it is possible to further suppress the occurrence of positional deviation in each semiconductor light detection element 10, and the two semiconductor light detection elements 10 are arranged with high positional accuracy.
- FIG. 8 is a plan view showing the semiconductor photodetection device according to the second embodiment.
- FIG. 9 is a diagram for explaining a cross-sectional configuration of the semiconductor photodetection device according to the second embodiment.
- the semiconductor photodetection device 2 includes a base 3 and a plurality of semiconductor photodetection elements 10 as in the semiconductor photodetection device 1.
- the semiconductor photodetection device 1 includes two semiconductor photodetection elements 10.
- a plurality of dummy bumps 37 are arranged so as to straddle each semiconductor light detection element 10 on the first side 13 side adjacent to each other in the adjacent semiconductor light detection elements 10.
- the two dummy bumps 37 are arranged on the first side 13 side so as to straddle the adjacent semiconductor photodetector elements 10.
- the two dummy bumps 37 are arranged on the first side 13 side so as to straddle the adjacent semiconductor photodetector elements 10.
- the dummy bumps 37 are arranged so as to straddle the semiconductor photodetecting elements 10 on the first side 13 side even if the semiconductor photodetecting elements 10 are likely to be displaced due to factors such as contraction of the plurality of bump electrodes 35. Therefore, it is possible to suppress the occurrence of positional deviation in each semiconductor light detection element 10. Therefore, the two semiconductor photodetecting elements 10 are arranged with high positional accuracy.
- FIGS. 6 and 7 Each modification shown in FIGS. 6 and 7 is different from the second embodiment in that a plurality of dummy bumps 37 are arranged on the first side 13 side so as to straddle the adjacent semiconductor photodetector elements 10. This also corresponds to the modified example.
- the bump electrode 35 and the dummy bump 37 may be the same solder bump or different solder bumps.
- a solder bump having a melting point lower than that of the bump electrode 35 may be used as the dummy bump 37.
- the bump electrode 35 is cured before the dummy bump 37 is cured, but the dummy bump 37 is in a molten state. Therefore, the bump electrodes 35 are cured in a state where the semiconductor photodetecting elements 10 are aligned by the surface tension of the dummy bumps 37 and the like. As a result, it is possible to further suppress the occurrence of positional deviation in each semiconductor light detection element 10.
- the bump electrode 35 and the dummy bump 37 may have different sizes. For example, as shown in FIGS. 10 and 11, the dummy bump 37 may be smaller than the bump electrode 35. Not only the bump electrode 35 but also the dummy bump 37 contracts when it is cured. However, since the dummy bumps 37 are smaller than the bump electrodes 35, the contraction rate of the dummy bumps 37 is relatively small, and the force acting on the semiconductor photodetecting element 10 when contracting is extremely small. Therefore, it is possible to reliably suppress the occurrence of positional deviation in each semiconductor light detection element 10. When the dummy bump 37 is a solder bump having a melting point lower than that of the bump electrode 35, it is possible to further reliably prevent the positional deviation of each semiconductor photodetecting element 10.
- the semiconductor photodetecting elements 10 are positioned adjacent to each other in a state of being aligned in the first direction on the main surface 3a of the base 3, but the present invention is not limited to this.
- the semiconductor photodetecting elements 10 may be positioned adjacent to each other on the main surface 3a of the base 3 in a state of being aligned in the second direction.
- the second side 15 of one semiconductor light detection element 10 and the second side 15 of the other semiconductor light detection element 10 are adjacent to each other.
- the number of the semiconductor light detection elements 10 is not limited to the number described above, and the semiconductor light detection devices 1 and 2 may include three or more semiconductor light detection elements 10.
- the number of bump electrodes 35 and dummy bumps 37 is not limited to the number described above.
- the present invention can be used in a semiconductor photodetection device including a plurality of semiconductor photodetection elements.
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Abstract
Description
図1及び2を参照して、第一実施形態に係る半導体光検出装置1の構成を説明する。図1は、第一実施形態に係る半導体光検出装置を示す平面図である。図2は、第一実施形態に係る半導体光検出装置の断面構成を説明するための図である。
図8及び図9を参照して、第二実施形態に係る半導体光検出装置2の構成を説明する。図8は、第二実施形態に係る半導体光検出装置を示す平面図である。図9は、第二実施形態に係る半導体光検出装置の断面構成を説明するための図である。
Claims (9)
- 半導体光検出装置であって、
基体と、
第一方向で互い対向する一対の第一辺と、前記一対の第一辺よりも短く且つ前記第一方向と直交する第二方向で互いに対向する一対の第二辺と、を有する平面形状を呈すると共に、並んだ状態で互いに隣り合って前記基体上に配置された複数の半導体光検出素子と、
各前記半導体光検出素子の前記一対の第一辺側にそれぞれ配置され、前記基体と各前記半導体光検出素子とを電気的且つ機械的に接続する複数のバンプ電極と、
各前記半導体光検出素子の前記一対の第二辺側にそれぞれ少なくとも一つ配置され、前記基体と各前記半導体光検出素子とを機械的に接続する複数のダミーバンプと、を備えている。 - 請求項1に記載の半導体光検出装置であって、
各前記半導体光検出素子は前記第一方向で並んだ状態で互いに隣り合っている。 - 請求項1又は2に記載の半導体光検出装置であって、
前記複数のダミーバンプは、隣り合う前記複数の半導体光検出素子に跨るように配置されている。 - 請求項1~3のいずれか一項に記載の半導体光検出装置であって、
前記第一辺と前記第二辺とのうち、隣り合う前記複数の半導体光検出素子において互いに隣り合う辺側に各前記半導体光検出素子に跨るように少なくとも一つ配置され、前記基体と各前記半導体光検出素子とを機械的に接続するダミーバンプを更に備えている。 - 半導体光検出装置であって、
基体と、
第一方向で互い対向する一対の第一辺と、前記第一方向と直交する第二方向で互いに対向する一対の第二辺と、を有する平面形状を呈すると共に、前記第一方向で並んだ状態で互いに隣り合って前記基体上に配置された複数の半導体光検出素子と、
各前記半導体光検出素子の前記一対の第一辺側にそれぞれ配置され、前記基体と各前記半導体光検出素子とを電気的且つ機械的に接続する複数のバンプ電極と、
隣り合う前記複数の半導体光検出素子において互いに隣り合う前記第一辺側に各前記半導体光検出素子に跨るように配置され、前記基体と各前記半導体光検出素子とを機械的に接続する複数のダミーバンプと、を備えている。 - 請求項1~5のいずれか一項に記載の半導体光検出装置であって、
前記複数の半導体光検出素子には、同じ製造プロセスにて形成され、前記複数のバンプ電極と前記複数のダミーバンプとが接続される複数の導体パッドが配置されている。 - 請求項1~6のいずれか一項に記載の半導体光検出装置であって、
前記複数のバンプ電極は、はんだバンプであり、
前記複数のダミーバンプは、前記複数のバンプ電極よりも融点が低いはんだバンプである。 - 請求項1~7のいずれか一項に記載の半導体光検出装置であって、
前記複数のダミーバンプは、前記複数のバンプ電極よりも小さい。 - 請求項1~8のいずれか一項に記載の半導体光検出装置であって、
各前記半導体光検出素子は、前記第二方向を長手方向とする2次元画像の取得及びTDI駆動が可能な固体撮像素子である。
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