WO2018047635A1 - 固体撮像素子および製造方法、並びに電子機器 - Google Patents
固体撮像素子および製造方法、並びに電子機器 Download PDFInfo
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- WO2018047635A1 WO2018047635A1 PCT/JP2017/030463 JP2017030463W WO2018047635A1 WO 2018047635 A1 WO2018047635 A1 WO 2018047635A1 JP 2017030463 W JP2017030463 W JP 2017030463W WO 2018047635 A1 WO2018047635 A1 WO 2018047635A1
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Definitions
- the present disclosure relates to a solid-state imaging device, a manufacturing method, and an electronic device, and more particularly, to a solid-state imaging device, a manufacturing method, and an electronic device that can further reduce the chip size.
- a solid-state imaging device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) image sensor is used.
- the solid-state imaging device has a pixel in which a photodiode that performs photoelectric conversion and a plurality of transistors are combined, and outputs a pixel signal that is output from a plurality of pixels arranged on an image plane on which an object image is formed. Based on this, an image is constructed.
- the structure of the solid-state imaging device a front side irradiation type in which light is irradiated on the surface of the semiconductor substrate on which the photodiode is formed, and a back side irradiation type in which light is irradiated on the back surface of the semiconductor substrate on which the photodiode is formed.
- the back-illuminated solid-state imaging device has a structure in which a wiring layer is provided on the opposite side to the light receiving surface, the photodiode can receive more light.
- an electrode pad is provided outside a pixel region of a semiconductor substrate and electrically connected to the outside using a wire, or electrically connected to the outside using a solder ball.
- a wire or electrically connected to the outside using a solder ball.
- flip chip bonding is used.
- Patent Document 1 glass is bonded to a light receiving surface of a semiconductor substrate on which a color filter and an on-chip lens are formed, and a through hole is formed from the back surface side of the semiconductor substrate toward the electrode pad.
- a solid-state imaging device having a structure in which rewiring is formed on the opposite side of the light receiving surface and solder balls are mounted is disclosed.
- an electrode pad is disposed at a location where the pixel region of the solid-state imaging device is removed, and a through hole is formed from the back side so as to penetrate the semiconductor substrate up to the electrode pad.
- the mounting method of taking out the electrode on the back surface can reduce the chip size of the solid-state imaging device as compared with the mounting method of taking out the electrode by wire bonding, it does not significantly reduce the chip size of the solid-state imaging device. It was difficult.
- the present disclosure has been made in view of such circumstances, and is intended to enable further reduction in chip size.
- a solid-state imaging device includes a semiconductor substrate provided with a pixel region in which a plurality of pixels are arranged in a plane, and a wiring that is stacked on the semiconductor substrate and connected to the plurality of pixels. And a support substrate bonded to the wiring layer and supporting the semiconductor substrate, the wiring layer being externally positioned at a position overlapping the pixel region when the semiconductor substrate is viewed in plan view.
- a plurality of electrode pads used for electrical connection with the plurality of electrode pads are disposed, and through holes are provided in the support substrate at locations corresponding to the plurality of electrode pads.
- a manufacturing method includes a semiconductor substrate provided with a pixel region in which a plurality of pixels are arranged in a plane, and a wiring stacked on the semiconductor substrate and connected to the plurality of pixels.
- a method for manufacturing a solid-state imaging device comprising: a wiring layer; and a support substrate that is bonded to the wiring layer and supports the semiconductor substrate, the wiring layer has the pixel region when the semiconductor substrate is viewed in plan. Forming a plurality of electrode pads used for electrical connection with the outside at overlapping positions, and forming through holes in the support substrate at locations corresponding to the plurality of electrode pads.
- An electronic device includes a semiconductor substrate provided with a pixel region in which a plurality of pixels are arranged in a plane, and a wiring that is stacked on the semiconductor substrate and connected to the plurality of pixels.
- the wiring layer has an external position at a position overlapping the pixel region when the semiconductor substrate is viewed in a plan view.
- a plurality of electrode pads used for electrical connection with the plurality of electrode pads are disposed, and the support substrate includes a solid-state imaging device provided with through holes at locations corresponding to the plurality of electrode pads.
- the wiring layer includes a plurality of electrode pads used for electrical connection to the outside at a position overlapping the pixel region when the semiconductor substrate is viewed in plan, and is disposed on the support substrate. Are provided with through holes at locations corresponding to the plurality of electrode pads.
- the chip size can be further reduced.
- FIG. 1 is a diagram illustrating a configuration example of a first embodiment of an image sensor to which the present technology is applied.
- FIG. 1 shows a schematic cross-sectional configuration of the image sensor 11.
- the imaging device 11 includes a support substrate 12, a multilayer wiring layer 13, a semiconductor substrate 14, a color filter layer 15, an on-chip lens layer 16, a glass seal resin layer 17, and a glass protective substrate 18 in order from the lower side of FIG. Configured.
- the imaging element 11 is a backside illumination type solid-state imaging element in which light is emitted from the back side of the semiconductor substrate 14 (upper side in FIG. 1) to the pixels formed on the semiconductor substrate 14.
- the support substrate 12 is a substrate for supporting the semiconductor substrate 14 that has been thinned so that light emitted from the back side can be received by the pixels.
- the multilayer wiring layer 13 is a wiring layer in which wiring connected to pixels formed on the semiconductor substrate 14 is formed in a multilayer structure.
- the multilayer wiring layer 13 has a two-layer structure in which a first wiring layer 21-1 and a second wiring layer 21-2 are stacked from the semiconductor substrate 14 side.
- the wiring is formed by a connection conductor having conductivity such as copper, for example.
- the electrode pad layer 22 is provided on the support substrate 12 side with respect to the first wiring layer 21-1 and the second wiring layer 21-2.
- the first wiring layer 21-1, the second wiring layer 21-2, the electrode pad layer 22, and the through electrode connecting the respective layers are insulated by the interlayer insulating film 23. It is comprised so that.
- the plurality of electrode pads 24 constituting the electrode pad layer 22 are formed of a connection conductor having conductivity such as aluminum, for example.
- a through hole 25 formed so as to penetrate is provided. Accordingly, the electrode pad 24 is opened by the through hole 25 and can be used for electrical connection with the outside of the imaging element 11.
- three electrode pads 24-1 to 24-3 are arranged on the electrode pad layer 22, and three electrodes corresponding to the electrode pads 24-1 to 24-3 are provided on the support substrate 12, respectively. Two through holes 25-1 to 25-3 are formed.
- the semiconductor substrate 14 is a wafer in which a material such as single crystal silicon is thinly formed. A plurality of pixels are arranged in a matrix on the semiconductor substrate 14.
- the color filter layer 15 has a planar filter for transmitting light of colors (for example, three primary colors of red, green, and blue) received by each pixel for each of a plurality of pixels arranged on the semiconductor substrate 14. Arranged and configured.
- the on-chip lens layer 16 is configured by arranging, in a planar manner, microlenses for condensing light on each pixel for each of a plurality of pixels arranged on the semiconductor substrate 14.
- the glass seal resin layer 17 is a layer made of a transparent resin for bonding the glass protective substrate 18 to the semiconductor substrate 14 without cavity.
- the glass protective substrate 18 is a substrate formed of transparent glass for protecting the light receiving surface of the image sensor 11.
- the imaging element 11 configured as described above is arranged directly below the pixel area where the pixels are formed on the semiconductor substrate 14, that is, in an arrangement so as to overlap the pixel area when the imaging element 11 is viewed in a plan view.
- the pad 24 is formed.
- FIG. 2 shows a schematic configuration of the image sensor 11 as viewed from the support substrate 12 side.
- the image pickup device 11 has a configuration in which almost the entire range in the center is a pixel region 31 in a plan view, and an optical black region 32 is provided on the side of the pixel region 31. It has become.
- the pixel region 31 is a region where pixels that output pixel signals that constitute an image captured by the image sensor 11 are formed on the semiconductor substrate 14. In the pixel region 31, a plurality of pixels are arranged in a plane.
- the optical black area 32 is optically shielded, and is an area where pixels that output a pixel signal used as a black reference when an image captured by the image sensor 11 is constructed are arranged.
- the several electrode pad 24 is arrange
- the imaging device 11 can reduce the chip size by arranging the plurality of electrode pads 24 so as to overlap the pixel region 31 when viewed in plan.
- the electrode pad is arranged outside the pixel region in plan view so as not to overlap the pixel region, only an area necessary for forming the electrode pad outside the pixel region is obtained. It was necessary to design a large chip size.
- the imaging element 11 is provided with an electrode pad 24 made of aluminum on the support substrate 12 side of the multilayer wiring layer 13, and the through hole 25 is opened to the electrode pad 24.
- the electrode pad 24 can be disposed directly below the pixel region 31.
- the image sensor 11 does not adversely affect the pixels arranged in the pixel region 31, that is, does not adversely affect the image picked up by the image sensor 11, and the chip size is made smaller than before. be able to.
- the image pickup device 11 can draw out the wiring in the direction directly below the pixel region 31. Miniaturization can be realized. Further, since the image sensor 11 can shorten the wiring, the power supply can be stabilized and the power consumption can be reduced.
- the image pickup device 11 can be flip-chip mounted on another substrate (for example, a logic circuit substrate 62 in FIG. 28 described later) having a different chip size directly below the pixel without increasing the chip size. , High functionality can be achieved.
- the electrode pads 24 are arranged at positions overlapping the pixel region 31.
- some of the electrode pads 24 are arranged outside the pixel region 31. Also good. That is, the chip size of the image sensor 11 can be reduced by adopting a configuration in which at least a part of the plurality of electrode pads 24 is arranged at a position overlapping the pixel region 31.
- the electrode pad 24 is made of aluminum, unlike the wirings constituting the first wiring layer 21-1 and the second wiring layer.
- the same copper as the wirings constituting the first wiring layer 21-1 and the second wiring layer may be employed.
- FIG. 3 is a cross-sectional view showing a second configuration example of the image sensor 11. Note that in the image sensor 11A shown in FIG. 3, the same reference numerals are given to the same components as those in the image sensor 11 shown in FIG. 1, and detailed description thereof is omitted.
- the image pickup device 11 ⁇ / b> A includes a support substrate 12, a multilayer wiring layer 13 ⁇ / b> A, a semiconductor substrate 14, a color filter layer 15, an on-chip lens layer 16, a glass seal resin layer 17, in order from the lower side of FIG.
- the glass protective substrate 18 is laminated.
- the multilayer wiring layer 13A has a configuration in which the first wiring layer 21-1 and the second wiring layer 21-2 are formed, but the electrode pad layer 22 shown in FIG. 1 is not provided.
- electrode pads 26-1 to 26-3 are arranged on a part of the second wiring layer 21-2.
- the electrode pads 26-1 to 26-3 can be formed simultaneously with the patterning of the wiring that constitutes the second wiring layer 21-2, and the wiring that constitutes the second wiring layer 21-2. The same copper is used.
- the image pickup device 11A as in the image pickup device 11 of FIG. 1, through holes 25-1 to 25-3 penetrating the support substrate 12 are provided so that the electrode pads 26-1 to 26-3 are opened. Is formed. And the electrode pad 26 is arrange
- the imaging element 11A is closest to the support substrate 12, for example, without providing the electrode pad layer 22 (FIG. 1) only for use in electrical connection with the outside in the multilayer wiring layer 13A.
- a part of the wiring layer 21 is structured to be used as the electrode pad 26.
- a part of the wiring layer 21 other than the wiring layer 21 closest to the support substrate 12 may be used as the electrode pad 26. In this case, a through hole 25 that opens to the electrode pad 26 is formed.
- the image pickup device 11A configured as described above has a chip size larger than that of the conventional one due to the structure in which the electrode pad 26 is disposed immediately below the pixel region 31 (FIG. 2) of the semiconductor substrate 14 as in the case of the image pickup device 11 of FIG. Can be miniaturized.
- the multilayer wiring layer 13A is laminated on the surface of the semiconductor substrate 14, and the support substrate 12 is bonded from above the semiconductor substrate 14 via the multilayer wiring layer 13A.
- the plurality of electrode pads 26 formed in the multilayer wiring layer 13A are formed so as to overlap the pixel region 31 in the arrangement so as to be directly above the pixel region 31 (FIG. 2) of the semiconductor substrate 14 at the time of manufacture. Is done.
- the intermediate structure composed of the support substrate 12, the multilayer wiring layer 13A, and the semiconductor substrate 14 is inverted to thin the semiconductor substrate 14 from the back surface side.
- the color filter layer 15 and the on-chip lens layer 16 are laminated on the back surface of the semiconductor substrate 14.
- an adhesive that becomes the glass seal resin layer 17 is applied to the entire back surface of the semiconductor substrate 14 including the on-chip lens layer 16, and the glass protective substrate 18 is adhered.
- the glass protective substrate 18 and the semiconductor substrate 14 are bonded together in a cavityless structure via the glass seal resin layer 17.
- the support substrate 12, the multilayer wiring layer 13A, the semiconductor substrate 14, the color filter layer 15, the on-chip lens layer 16, the glass seal resin layer 17, and the glass protection is inverted.
- the support substrate 12 is thinned to about 100 ⁇ m by using a back grinding technique such as grinding or polishing.
- a resist pattern 33 is formed on the support substrate 12 as shown in the second stage of FIG.
- the resist pattern 33 is formed by forming a resist film on the entire surface of the support substrate 12 and then performing patterning so that portions corresponding to the electrode pads 26-1 to 26-3 are opened.
- the support substrate 12 is processed using a dry etching method or the like so as to penetrate the support substrate 12 to the multilayer wiring layer 13A at locations corresponding to the electrode pads 26-1 to 26-3. A perforated hole. Then, by removing a part of the interlayer insulating film 23 of the multilayer wiring layer 13A using the support substrate 12 as a mask, the electrode pads 26-1 to 26-3 are penetrated as shown in the third row of FIG. Through holes 25-1 to 25-3 are formed.
- the imaging element 11A can be manufactured by a manufacturing method in which the color filter layer 15 and the on-chip lens layer 16 are stacked on the light receiving surface side of the semiconductor substrate 14 and then the through holes 25 are formed in the support substrate 12. it can.
- the 15th paragraph to the 15th paragraph of JP-A-2009-277732 are disclosed. This is described in detail in the 21st paragraph.
- a forming method for forming the color filter layer 15 and the on-chip lens layer 16 in the backside-illuminated imaging device 11A will be described in detail in paragraphs 22 to 30 of JP-A-2009-277732. Has been.
- FIG. 6 is a cross-sectional view illustrating a third configuration example of the image sensor 11. Note that in the image sensor 11B shown in FIG. 6, the same reference numerals are given to configurations common to the image sensor 11A in FIG. 3, and detailed description thereof is omitted.
- the image sensor 11B is similar to the image sensor 11A in FIG. 3 in that the support substrate 12, the multilayer wiring layer 13A, the semiconductor substrate 14, the color filter layer 15, the on-chip lens layer 16, and the glass seal resin layer. 17 and a glass protective substrate 18 are laminated.
- the image pickup device 11B is a through-hole in which the electrode pads 26-1 to 26-3 are arranged in the multilayer wiring layer 13A and the electrode pads 26-1 to 26-3 are opened. Holes 25-1 to 25-3 are formed in the support substrate 12.
- the insulating film 41 is formed on the entire side surface of the through hole 25 and the upper surface of the support substrate 12, and is insulated from the support substrate 12 by the insulating film 41.
- through electrodes 42-1 to 42-3 are provided which are electrically connected to 26-3.
- the insulating film 41 is made of, for example, an insulating SiO 2 film or SiN film, and insulates the support substrate 12 and the through electrodes 42-1 to 42-3.
- the through electrode 42 is formed so as to be electrically connected to the electrode pads 26-1 to 26-3 at the bottom surface portion of the through hole 25 and to extend to the upper surface of the support substrate 12 through the through hole 25.
- the portion of the through electrode 42 on the upper surface side of the support substrate 12 is used for electrical connection with the outside of the imaging element 11B.
- the image sensor 11B configured as described above has a conventional structure in which the electrode pad 26 and the through electrode 42 are disposed immediately below the pixel region 31 (FIG. 2) of the semiconductor substrate 14 as in the image sensor 11A of FIG. As a result, the chip size can be reduced.
- steps similar to the first to sixth steps described with reference to FIGS. 4 and 5 are performed, and thereby the support substrate 12 is formed so that the electrode pads 26-1 to 26-3 are opened.
- An intermediate structure in which the through holes 25-1 to 25-3 are formed is manufactured.
- the entire upper surface of the support substrate 12 including the bottom surface and side surfaces of the through hole 25 is insulated by, for example, plasma CVD (Chemical Vapor Deposition) method.
- a film 41 is formed.
- the electrode pad 26 is exposed by removing the insulating film 41 on the bottom surface of the through hole 25 using, for example, an etch back method. To do.
- a barrier metal film (not shown) is formed on the entire top surface of the support substrate 12 including the bottom surface and side surfaces of the through hole 25 by using a sputtering method.
- the seed layer 43 is formed.
- the barrier metal film is formed in order to prevent diffusion of the connection conductor (copper forming the through electrode 42 in the configuration example of the image sensor 11B).
- the barrier metal film for example, titanium (Ti) or tungsten (W), an oxide film of titanium or tungsten, or the like can be used. Moreover, you may use those alloys as a barrier metal film. In the image sensor 11B, it is preferable to use titanium as the barrier metal film.
- the seed layer 43 is used as an electrode when the connection conductor is embedded by, for example, an electroplating method.
- a resist pattern 33 is formed in a predetermined region where the through electrodes 42-1 to 42-3 are not formed on the upper surface of the seed layer 43, as shown in the first row of FIG.
- the fifteenth step as shown in the second stage of FIG. 8, by electroplating the connection conductor until the thickness of the through electrode 42 is reached, the seed layer 43 where the resist pattern 33 is not formed is formed. Then, the plating layer 44 is formed.
- the seed layer 43 and the barrier metal film (not shown) formed under the resist pattern 33 are removed by, for example, wet etching.
- the plating layer 44 that is continuous by the seed layer 43 is independent, and the through electrodes 42-1 to 42-3 are formed as shown in the third row of FIG.
- rewiring is also formed on the upper surface of the support substrate 12.
- the image pickup device 11B as shown in FIG. 6 is manufactured by cutting out so as to have a prescribed outer shape.
- the imaging element 11B forms the through hole 25 in the support substrate 12 after laminating the color filter layer 15 and the on-chip lens layer 16 on the light receiving surface side of the semiconductor substrate 14, and then the through electrode 42 is formed. It can manufacture with the manufacturing method to form.
- the imaging element 11B can be used in a state as shown in FIG. 6, but may be used as a configuration in which a solder ball is provided for the through electrode 42 as necessary. .
- FIG. 9 shows a modification of the image sensor 11B.
- a portion of the through electrode 42 on the upper surface side of the support substrate 12 is used as a land portion for mounting solder balls. Open.
- the solder balls 35-1 to 35-3 are mounted on the land portions and are electrically connected to the through electrodes 42-1 to 42-3, respectively. .
- FIG. 10 is a cross-sectional view showing a fourth configuration example of the image sensor 11. Note that in the image sensor 11C shown in FIG. 10, the same reference numerals are given to configurations common to the image sensor 11B of FIG. 6, and detailed description thereof is omitted.
- the image sensor 11 ⁇ / b> C is similar to the image sensor 11 ⁇ / b> B in FIG. 6.
- the support substrate 12, the multilayer wiring layer 13 ⁇ / b> A, the semiconductor substrate 14, the color filter layer 15, the on-chip lens layer 16, and the glass seal resin layer. 17 and a glass protective substrate 18 are laminated.
- the image sensor 11C is a through-hole in which the electrode pads 26-1 to 26-3 are arranged in the multilayer wiring layer 13A and the electrode pads 26-1 to 26-3 are opened. Holes 25-1 to 25-3 are formed in the support substrate 12, and an insulating film 41 is formed.
- the imaging element 11C has a configuration in which an embedded through electrode 45 is formed inside the through hole 25.
- the embedded through electrode 45 can be formed by embedding the through hole 25 with a connection conductor when performing electroplating in the fifteenth step (second stage in FIG. 8) described above.
- the image sensor 11C configured as described above has a structure in which the electrode pad 26 and the embedded through electrode 45 are arranged immediately below the pixel region 31 (FIG. 2) of the semiconductor substrate 14 as in the image sensor 11B of FIG.
- the chip size can be reduced as compared with the conventional case.
- FIG. 11 is a cross-sectional view showing a sixth configuration example of the image sensor 11.
- the same reference numerals are given to the same components as those of the image sensor 11A in FIG. 3, and detailed description thereof is omitted.
- the imaging device 11D includes a support substrate 12D, a multilayer wiring layer 13D, a semiconductor substrate 14, a color filter layer 15, an on-chip lens layer 16, a glass seal resin layer 17, and a glass protective substrate 18. Configured.
- the image sensor 11D has a configuration in which electrode pads 26-1 to 26-6 provided on the second wiring layer 21-2 are formed so as to be exposed on the surface of the multilayer wiring layer 13D.
- the through electrodes 46-1 to 46-6 formed so as to penetrate the support substrate 12D are connected to the electrode pads 26-1 to 26-6 at the joint surface between the support substrate 12D and the multilayer wiring layer 13D. Is done.
- the imaging device 11D is configured by hybrid bonding a support substrate 12D in which through electrodes 46-1 to 46-6 are embedded in through holes in advance through an insulating film (not shown) and a multilayer wiring layer 13D.
- the imaging element 11D is embedded on the surface of the support substrate 12D corresponding to the through electrodes 46-1 to 46-6 so as to be embedded in the insulating film 51 formed on the entire surface of the support substrate 12D. 1 to 52-6 are formed.
- the imaging device 11D configured as described above has a structure in which the electrode pad 26 and the embedded electrode pad 52 are arranged immediately below the pixel region 31 (FIG. 2) of the semiconductor substrate 14 as in the imaging device 11A of FIG.
- the chip size can be made smaller than before.
- non-through vias 47-1 to 47-6 having a length not penetrating the support substrate 12D are formed in the support substrate 12D.
- a resist pattern that can provide an opening having a diameter of about 2.0 ⁇ m to 10.0 ⁇ m is formed on the upper surface of the support substrate 12D, and dry etching is performed using the resist pattern as a mask to obtain a depth of about 30 ⁇ m to 80 ⁇ m.
- a via is formed.
- a thermal oxide film is formed by a diffusion furnace, or an LP-SiN film is formed by a CVD apparatus.
- a tungsten-based barrier metal film is formed by sputtering, a copper seed layer is formed, and then the via is filled with copper by using an electroplating method.
- the non-through vias 47-1 to 47-6 can be formed in the support substrate 12D.
- electrode pads 26-1 to 26-6 connected to the non-through vias 47-1 to 47-6 of the support substrate 12D are directly below the pixel region 31 of the semiconductor substrate 14. It is formed using a damascene method at a position (directly above in the process).
- the support substrate 12D is bonded to the multilayer wiring layer 13D stacked on the semiconductor substrate.
- the electrode pads 26-1 to 26-6 of the multilayer wiring layer 13D and the non-through vias 47-1 to 47-6 of the support substrate 12D are joined by the same conductor (Cu-Cu joining).
- hybrid bonding is performed to join the surfaces of the support substrate 12D and the interlayer insulating film 23 together.
- the intermediate structure composed of the support substrate 12D, the multilayer wiring layer 13D, and the semiconductor substrate 14 is inverted.
- the semiconductor substrate 14 is thinned from the back side.
- the color filter layer 15 and the on-chip lens layer 16 are laminated on the back surface of the semiconductor substrate 14.
- an adhesive that becomes the glass seal resin layer 17 is applied to the entire back surface of the semiconductor substrate 14 including the on-chip lens layer 16, and the glass protective substrate 18. Glue.
- the glass protective substrate 18 and the semiconductor substrate 14 are bonded together with a cavityless structure via the glass seal resin layer 17.
- the support substrate 12D, the multilayer wiring layer 13D, the semiconductor substrate 14, the color filter layer 15, the on-chip lens layer 16, the glass seal resin layer 17, and the glass protection As shown in the third row of FIG. 13, the support substrate 12D, the multilayer wiring layer 13D, the semiconductor substrate 14, the color filter layer 15, the on-chip lens layer 16, the glass seal resin layer 17, and the glass protection
- the intermediate structure composed of the substrate 18 is inverted.
- the support substrate 12D is thinned by using a back grinding technique such as grinding or polishing, and the heads of the non-penetrating vias 47-1 to 47-6 are formed. Further, the wet etching method or the dry etching method is used. The entire surface of the support substrate 12D is dug. As a result, the non-penetrating vias 47-1 to 47-6 penetrate the support substrate 12D and become the through electrodes 46-1 to 46-6 as shown in the first stage of FIG. The tips of the through electrodes 46-1 to 46-6 may be formed so as to protrude from the support substrate 12D.
- an insulating film 51 is formed on the entire surface of the support substrate 12D.
- the insulating film 51 is formed by using a low-temperature CVD method of 200 ° C. or less that does not damage the color filter layer 15.
- a resist pattern is formed on the insulating film 51, and grooves are formed in the insulating film 51 by dry etching. Then, as in the damascene method, a barrier metal film and a seed layer are formed by a sputtering method, and then, as shown in the third stage of FIG. 52-6 is formed.
- the image pickup device 11D as shown in FIG. 11 is manufactured by cutting out to a prescribed outer shape.
- the image pickup device 11D has the color filter layer 15 and the on-chip on the light receiving surface side of the semiconductor substrate 14 after the support substrate 12D on which the non-through vias 47 to be the through electrodes 46 are formed is joined to the semiconductor substrate 14. It can be manufactured by a manufacturing method in which the lens layer 16 is laminated. As a result, the imaging element 11D can apply a high temperature process when forming the non-through via 47 to be the through electrode 46, and can further improve the reliability.
- the insulating film for insulating the through electrode 46 from the support substrate 12D can be formed by a high-temperature process.
- an insulating film silicon isolation film
- the imaging element 11D can avoid a decrease in reliability as a result of the insulating property of the through electrode 46 with respect to the support substrate 12D being improved by forming an insulating film having high insulation resistance.
- the manufacturing method of the image sensor 11D is not limited to the steps described with reference to FIGS.
- the thinning is stopped before cueing the non-through vias 47-1 to 47-6.
- a resist pattern 33 having openings provided so as to correspond to the buried electrode pads 52-1 to 52-6 is formed on the support substrate 12D, and the support substrate 12D is dug by dry etching. Include. At this time, the non-through vias 47-1 to 47-6 are protected by oxidation. Further, an insulating film (not shown) is formed by using a low temperature CVD method at 200 ° C. or lower which does not cause damage to the color filter layer 15. Subsequently, the entire substrate is etched back as long as the oxide film on the surface of the support substrate 12D is not lost, so that the non-through vias 47-1 to 47-6 penetrate the support substrate 12D, as shown in the upper side of FIG. Through electrodes 46-1 to 46-6.
- the image sensor 11D can be manufactured by such a manufacturing method.
- the thinning is stopped before cueing the non-through vias 47-1 to 47-6.
- the support substrate 12D is etched back by wet etching, for example, so that the non-penetrating vias 47-1 to 47-6 penetrate the support substrate 12D, as shown in the upper side of FIG. Through electrodes 46-1 to 46-6.
- the through electrodes 46-1 to 46-6 are protected by oxidation, and etching is performed so that the tips of the through electrodes 46-1 to 46-6 protrude from the support substrate 12D.
- an insulating film 53 made of an organic resin such as a solder resist is formed on the entire surface of the support substrate 12D.
- the cueing of the through electrodes 46-1 to 46-6 is performed. Is done. In this way, it is possible to form a structure in which the tip surfaces of the through electrodes 46-1 to 46-6 are used as electrode pads with the tip surfaces exposed from the insulating film 53.
- the image sensor 11D can be manufactured by such a manufacturing method.
- the multilayer wiring layer 13D stacked on the semiconductor substrate 14 is applied to the multilayer wiring layer 13D stacked on the semiconductor substrate 14 as in the 22nd process (second stage of FIG. 12). Then, the support substrate 12D is bonded.
- the support substrate 12D is thinned, and the thinning is stopped before the non-through vias 47-1 to 47-6 are exposed.
- the thinning may be stopped when the non-through vias 47-1 to 47-6 are exposed.
- a resist pattern 33 provided with openings so as to correspond to the non-through vias 47-1 to 47-6 is formed on the support substrate 12D, and the resist pattern 33 is used as a mask to support the resist pattern 33. Groove processing is performed on the substrate 12D. As a result, the non-penetrating vias 47-1 to 47-6 penetrate the support substrate 12D, and become through electrodes 46-1 to 46-6 as shown in the third row of FIG.
- an insulating film 51 is formed on the support substrate 12D.
- the insulating film 51 can be formed, for example, at a temperature of about 400 ° C. used for forming a general copper wiring.
- the entire surface is etched back to the extent that the surface of the support substrate 12D is not exposed, and the through electrodes 46-1 to 46-6 are exposed as shown in the fourth row of FIG.
- the embedded electrode pad 52-1 that is embedded in the support substrate 12D by the electrolytic plating method and the CMP method is used.
- To 52-6 are formed and planarized. Subsequently, as shown in the first stage of FIG. 18, the embedded electrode pads 52-1 to 52-6 are capped with the insulating film 51.
- a temporary substrate 54 made of, for example, a silicon substrate is bonded to the insulating film 51 as shown in the second stage of FIG.
- the intermediate structure composed of the support substrate 12D, the multilayer wiring layer 13D, the semiconductor substrate 14, the insulating film 51, and the temporary substrate 54 is inverted.
- the semiconductor substrate 14 is thinned from the back surface side.
- the color filter layer 15 and the on-chip lens layer 16 are laminated on the back surface of the semiconductor substrate 14.
- an adhesive that becomes the glass seal resin layer 17 is applied to the entire back surface of the semiconductor substrate 14 including the on-chip lens layer 16, and the glass protective substrate 18. Glue.
- the glass protective substrate 18 and the semiconductor substrate 14 are bonded together with a cavityless structure via the glass seal resin layer 17.
- the temporary substrate 54 is removed from the intermediate structure.
- the support substrate 12D, the multilayer wiring layer 13D, the semiconductor substrate 14, the color filter layer 15, the on-chip lens layer 16, the glass seal resin layer 17, and the glass protective substrate 18 and the intermediate structure composed of the insulating film 51 is inverted.
- a resist pattern is formed on the insulating film 51 so that the buried electrode pads 52-1 to 52-6 are exposed, and insulation is performed by dry etching. Groove processing is performed on the film 51. Alternatively, the buried electrode pads 52-1 to 52-6 may be exposed by performing etch back on the entire surface of the insulating film 51.
- the image sensor 11D can be manufactured by such a manufacturing method.
- a high-temperature process can be applied around the through electrodes 46-1 to 46-3, and the reliability of the imaging element 11D can be improved.
- FIG. 21 is a cross-sectional view showing a sixth configuration example of the image sensor 11.
- the same reference numerals are given to the same components as those in the image sensor 11A shown in FIG. 3, and the detailed description thereof is omitted.
- the imaging device 11E includes a support substrate 12E, a multilayer wiring layer 13A, a semiconductor substrate 14, a color filter layer 15, an on-chip lens layer 16, a glass seal resin layer 17, and a glass protective substrate 18. Configured.
- electrode pads 55-2 and 55-3 are formed so as to be exposed on the surface of the support substrate 12E, and the electrode pad 55-2 is electrically connected to the through electrode 46-2. 55-3 is configured to be electrically connected to the through electrode 46-3.
- the image sensor 11E has a configuration in which solder balls 56-1 to 56-3 are formed so as to protrude from the insulating film 51 formed on the entire surface of the support substrate 12E.
- the solder ball 56-1 is electrically connected to the through electrode 46-1
- the solder ball 56-2 is electrically connected to the electrode pad 55-2
- the solder ball 56-3 is connected to the electrode pad 55-3. And are electrically connected. That is, in the image sensor 11D, the electrode pads 26-1 to 26-3 are connected to the outside via the solder balls 56-1 to 56-3, respectively.
- the imaging device 11D configured as described above has an electrode pad 26 and solder balls 56-1 to 56-3 directly below the pixel region 31 (FIG. 2) of the semiconductor substrate 14 as in the imaging device 11A of FIG.
- the chip size can be reduced as compared with the conventional structure by the arrangement structure.
- the imaging device 11D can be mounted on another substrate by flip chip bonding using solder balls 56-1 to 56-3.
- FIGS. 22 and 26 a method for manufacturing the image sensor 11E of FIG. 21 will be described.
- a multilayer wiring layer 13A is laminated on the surface of the semiconductor substrate.
- the support substrate 12E is bonded from above the semiconductor substrate 14 via the multilayer wiring layer 13A.
- the support substrate 12E is thinned to about 100 ⁇ m, for example, by using a back grinding technique such as grinding or polishing. Then, as shown in the third row of FIG. 22, through holes are formed in the support substrate 12E at locations corresponding to the electrode pads 26-1 to 26-3 to embed the through electrodes 46-1 to 46-3, The surface of the support substrate 12E is grooved to form electrode pads 55-2 and 55-3.
- the insulating film 51 is formed on the entire surface of the support substrate 12E.
- the insulating film 51 can be formed, for example, at a temperature of about 400 ° C. used for forming a general copper wiring.
- an opening is formed in the insulating film 51 so as to provide a land portion on which the solder balls 56-1 to 56-3 are mounted in the subsequent step.
- the electrode 46-1 and the electrode pads 55-2 and 55-3 are exposed.
- a silicon oxide film 57 is formed on the entire surface of the insulating film 51 so as to fill the land portion, and the surface thereof is flattened.
- a temporary substrate 54 made of, for example, a silicon substrate is bonded to the silicon oxide film 57 as shown in the first stage of FIG.
- the intermediate structure composed of the support substrate 12E, the multilayer wiring layer 13A, the semiconductor substrate 14, the insulating film 51, the silicon oxide film 57, and the temporary substrate 54 is inverted. To do.
- the semiconductor substrate 14 is thinned from the back surface side.
- the color filter layer 15 and the on-chip lens layer 16 are laminated on the back surface of the semiconductor substrate 14.
- an adhesive that becomes the glass seal resin layer 17 is applied to the entire back surface of the semiconductor substrate 14 including the on-chip lens layer 16, and the glass protective substrate 18. Glue. As a result, the glass protective substrate 18 and the semiconductor substrate 14 are bonded together with a cavityless structure via the glass seal resin layer 17.
- the temporary substrate 54 is removed from the intermediate structure.
- the silicon oxide film 57 is removed and the land portion is opened.
- the solder balls 56-1 to 56-1 through 55 are electrically connected to the through electrode 46-1 and the electrode pads 55-2 and 55-3, respectively. 56-3 is formed.
- the image pickup device 11E as shown in FIG. 21 is manufactured by cutting out to a prescribed outer shape.
- the image pickup device 11E after the through electrodes 46-1 to 46-3 are formed so as to penetrate the support substrate 12E, the color filter layer 15 and the on-chip lens layer 16 are formed on the light receiving surface side of the semiconductor substrate. It can manufacture with the manufacturing method which laminates
- a seventh configuration example of the image sensor 11 will be described with reference to FIGS.
- the image sensor 11 can constitute a wafer level CSP (Chip Size Package) in which a chip-on-wafer is stacked on a semiconductor substrate on which a logic circuit, a memory circuit, and the like are formed.
- CSP Chip Size Package
- solder balls 56-1 to 56-6 are provided, the support substrate 12, the multilayer wiring layer 13A, the semiconductor substrate 14, and the color filter layer 15 are provided.
- -1 and 15-2, on-chip lens layers 16-1 and 16-2, a glass seal resin layer 17, and a glass protective substrate 18 are formed.
- the chip is cut into two chips 61-1 and 61-2 used as an image pickup device, and cut into a prescribed outer shape.
- the color filter layers 15-1 and 15-2 and the on-chip lens layers 16-1 and 16-2 are formed so as to be discontinuous at the portions separated in this way.
- the chip 61-1 is mounted on the logic circuit board 62.
- the logic circuit board 62 has a configuration in which a multilayer wiring layer 72 is laminated on a semiconductor substrate 71 on which a logic circuit is formed, and electrode pads 73-1 to 73-6 are formed on the surface of the multilayer wiring layer 72. Yes.
- the chip 61-1 is, for example, flip-chip bonded to the electrode pads 73-1 to 73-3 of the logic circuit board 62 by using the solder balls 56-1 to 56-3, thereby providing logic. Mounted on the circuit board 62.
- the chip 61-2 is mounted on the logic circuit board 62.
- the chip 61-2 is, for example, flip-chip bonded to the electrode pads 73-4 to 73-6 of the logic circuit board 62 by using the solder balls 56-4 to 56-6, thereby Mounted on the circuit board 62.
- the wafer level CSP 81 having the configuration in which the chips 61-1 and 61-2 are mounted on the logic circuit board 62 is manufactured.
- a configuration in which chips 61-1 and 61-2 are mounted on a memory circuit board on which a memory circuit is formed may be employed instead of the logic circuit board 62.
- a wafer level CSP may be configured by mounting a logic circuit board, a memory circuit board, or the like smaller than the image sensor 11 on the image sensor 11.
- the pitch at which the electrode pads 24 are arranged is 0.5 mm or more.
- the electrode pad is arranged directly above the embedded through electrode, it is preferable to use an electrode pad having an area larger than the diameter of the through electrode.
- the multilayer imaging device 11 having a configuration in which the support substrate 12 includes a logic element or a memory element, for example, the same as disclosed in paragraphs 17 to 30 of JP-A-2004-335647.
- the method can be used. That is, after forming the element, by forming a via (for example, ⁇ 2 to 5 ⁇ m and depth of 30 ⁇ m) that can be a through electrode so as to face the pixel pad, the through electrode 46 is formed directly below the pixel region 31. Can be formed. In this case, the through electrode 46 needs to be disposed at a distance of several ⁇ m from the via so that the element on the support substrate 12 is not adversely affected.
- this via was shown by the method of forming by forming between element formation and wiring formation, you may form the via
- the electrode pad 26 may not be disposed in the layer closest to the support substrate 12, and may be formed in any wiring layer 21 of the multilayer wiring layer 13. Furthermore, the electrode pad 26 may be formed so that two or more wirings are laminated. For example, as the electrode pad 26, various combinations such as a combination of an aluminum wiring and a tungsten plug, a combination of an aluminum wiring and a copper wiring, and a combination of a copper wiring and a copper wiring are used. Can do.
- the through electrode 46 is preferably made of copper, which has a small specific resistance and can be easily connected to the mounting substrate.
- gold (Au), aluminum (Al), tungsten (W), nickel (Ni), Tin (Sn) or an alloy thereof may be used.
- a structure in which glass is formed on the pixel array surface via an adhesive may be used.
- the support substrate 12 may incorporate peripheral circuit elements for driving pixels, memory elements, and the like.
- the imaging device 11 as described above is applied to various electronic devices such as an imaging system such as a digital still camera and a digital video camera, a mobile phone having an imaging function, or other devices having an imaging function. can do.
- FIG. 29 is a block diagram illustrating a configuration example of an imaging device mounted on an electronic device.
- the imaging apparatus 101 includes an optical system 102, an imaging element 103, a signal processing circuit 104, a monitor 105, and a memory 106, and can capture still images and moving images.
- the optical system 102 includes one or more lenses, guides image light (incident light) from a subject to the image sensor 103, and forms an image on a light receiving surface (sensor unit) of the image sensor 103.
- the above-described image sensor 11 is applied.
- the image sensor 103 electrons are accumulated for a certain period according to an image formed on the light receiving surface via the optical system 102. Then, a signal corresponding to the electrons accumulated in the image sensor 103 is supplied to the signal processing circuit 104.
- the signal processing circuit 104 performs various signal processing on the pixel signal output from the image sensor 103.
- An image (image data) obtained by performing signal processing by the signal processing circuit 104 is supplied to the monitor 105 and displayed, or supplied to the memory 106 and stored (recorded).
- the imaging apparatus 101 configured as described above can be further reduced in size, for example, by applying the imaging element 11 described above.
- FIG. 30 is a diagram illustrating a usage example in which the above-described image sensor is used.
- the image sensor described above can be used in various cases for sensing light such as visible light, infrared light, ultraviolet light, and X-ray as follows.
- Devices for taking images for viewing such as digital cameras and mobile devices with camera functions
- Devices used for traffic such as in-vehicle sensors that capture the back, surroundings, and interiors of vehicles, surveillance cameras that monitor traveling vehicles and roads, and ranging sensors that measure distances between vehicles, etc.
- Equipment used for home appliances such as TVs, refrigerators, air conditioners, etc. to take pictures and operate the equipment according to the gestures ⁇ Endoscopes, equipment that performs blood vessel photography by receiving infrared light, etc.
- Equipment used for medical and health care ⁇ Security equipment such as security surveillance cameras and personal authentication cameras ⁇ Skin measuring instrument for photographing skin and scalp photography Such as a microscope to do beauty Equipment used for sports-Equipment used for sports such as action cameras and wearable cameras for sports applications-Used for agriculture such as cameras for monitoring the condition of fields and crops apparatus
- this technique can also take the following structures.
- a semiconductor substrate provided with a pixel region in which a plurality of pixels are arranged in a plane;
- a wiring layer stacked on the semiconductor substrate and provided with wirings connected to the plurality of pixels;
- a support substrate bonded to the wiring layer and supporting the semiconductor substrate;
- a plurality of electrode pads used for electrical connection with the outside are arranged at a position overlapping the pixel region when the semiconductor substrate is viewed in plan view,
- the support substrate is provided with a through hole at a location corresponding to the plurality of electrode pads.
- the support substrate in which a conductor serving as a through electrode is embedded in the through hole in advance via an insulating film is bonded to each other between the surfaces, and the through electrode and the electrode pad are the same
- the through electrode is formed by embedding the conductor in a via formed at a depth not penetrating the support substrate, and thinning the support substrate to cue the conductor.
- the solid according to (8) Image sensor. (10) The solid-state imaging device according to (8) or (9), wherein an electrode pad is disposed on a surface of the support substrate corresponding to the through electrode. (11) Any one of (1) to (10) above, wherein solder balls formed on the surface of the support substrate so as to be electrically connected to the electrode pads are flip-chip bonded to another substrate.
- a semiconductor substrate provided with a pixel region in which a plurality of pixels are arranged in a plane;
- a manufacturing method of a solid-state imaging device comprising: a support substrate bonded to the wiring layer and supporting the semiconductor substrate;
- a plurality of electrode pads used for electrical connection with the outside are formed at positions overlapping the pixel region when the semiconductor substrate is viewed in plan view, The manufacturing method including the process of forming a through-hole in the said support substrate in the location corresponding to the said several electrode pad.
- a semiconductor substrate provided with a pixel region in which a plurality of pixels are arranged in a plane;
- a wiring layer stacked on the semiconductor substrate and provided with wirings connected to the plurality of pixels;
- a support substrate bonded to the wiring layer and supporting the semiconductor substrate;
- a plurality of electrode pads used for electrical connection with the outside are arranged at a position overlapping the pixel region when the semiconductor substrate is viewed in plan view,
- An electronic apparatus comprising a solid-state imaging device, wherein the support substrate is provided with through holes at locations corresponding to the plurality of electrode pads.
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Abstract
Description
・自動停止等の安全運転や、運転者の状態の認識等のために、自動車の前方や後方、周囲、車内等を撮影する車載用センサ、走行車両や道路を監視する監視カメラ、車両間等の測距を行う測距センサ等の、交通の用に供される装置
・ユーザのジェスチャを撮影して、そのジェスチャに従った機器操作を行うために、TVや、冷蔵庫、エアーコンディショナ等の家電に供される装置
・内視鏡や、赤外光の受光による血管撮影を行う装置等の、医療やヘルスケアの用に供される装置
・防犯用途の監視カメラや、人物認証用途のカメラ等の、セキュリティの用に供される装置
・肌を撮影する肌測定器や、頭皮を撮影するマイクロスコープ等の、美容の用に供される装置
・スポーツ用途等向けのアクションカメラやウェアラブルカメラ等の、スポーツの用に供される装置
・畑や作物の状態を監視するためのカメラ等の、農業の用に供される装置
(1)
複数の画素が平面的に配置される画素領域が設けられる半導体基板と、
前記半導体基板に対して積層され、複数の前記画素に接続される配線が設けられる配線層と、
前記配線層に対して接合され、前記半導体基板を支持する支持基板と
を備え、
前記配線層には、前記半導体基板を平面的に見て前記画素領域に重なり合う位置で、外部との電気的な接続に利用される複数の電極パッドが配置され、
前記支持基板には、複数の前記電極パッドに対応する箇所に貫通孔が設けられる
固体撮像素子。
(2)
前記配線層には、前記配線が多層構造で形成されており、前記配線よりも前記支持基板側に複数の前記電極パッドが配置される電極パッド層が設けられる
上記(1)に記載の固体撮像素子。
(3)
前記電極パッドは、前記配線と異なる導体により形成される
上記(1)または(2)に記載の固体撮像素子。
(4)
前記電極パッドは、前記配線層に多層構造で形成される前記配線の一部として、前記配線と同一の層に形成される
上記(1)に記載の固体撮像素子。
(5)
前記電極パッドは、前記配線と同一の導体により形成される
上記(1)または(4)に記載の固体撮像素子。
(6)
前記貫通孔の底面で前記電極パッドと電気的に接続され、前記貫通孔を通って前記支持基板の上面まで延在する貫通電極
をさらに備える上記(1)から(5)までのいずれかに記載の固体撮像素子。
(7)
前記貫通電極は、前記貫通孔を導体で埋め込むことにより形成される
上記(6)に記載の固体撮像素子。
(8)
前記貫通孔に絶縁膜を介して貫通電極となる導体が予め埋め込まれている前記支持基板と前記配線層とが互いの面どうしで接合されるとともに、前記貫通電極と前記電極パッドとが同一の導体どうしで接合される
上記(1)から(7)までのいずれかに記載の固体撮像素子。
(9)
前記支持基板を貫通しない深さで形成されたビアに前記導体が埋め込まれ、前記支持基板を薄肉化して前記導体を頭出しすることにより前記貫通電極が形成される
上記(8)に記載の固体撮像素子。
(10)
前記貫通電極に対応する前記支持基板の表面に電極パッドが配置される
上記(8)または(9)に記載の固体撮像素子。
(11)
前記電極パッドに電気的に接続されるように前記支持基板の表面に形成されるはんだボールを利用し、他の基板に対してフリップチップボンディングされる
上記(1)から(10)までのいずれかに記載の固体撮像素子。
(12)
前記支持基板を貫通して前記電極パッドに接続される貫通電極を形成した後に、前記半導体基板に対してカラーフィルタ層が積層される
上記(1)から(11)までのいずれかに記載の固体撮像素子。
(13)
複数の前記電極パッドは、前記半導体基板を平面的に見たときにグリッド状に配置される
上記(1)から(12)までのいずれかに記載の固体撮像素子。
(14)
前記半導体基板の裏面側から、前記画素が受光する光が照射される裏面照射型である
上記(1)から(12)までのいずれかに記載の固体撮像素子。
(15)
複数の画素が平面的に配置される画素領域が設けられる半導体基板と、
前記半導体基板に対して積層され、複数の前記画素に接続される配線が設けられる配線層と、
前記配線層に対して接合され、前記半導体基板を支持する支持基板と
を備える固体撮像素子の製造方法において、
前記配線層に、前記半導体基板を平面的に見て前記画素領域に重なり合う位置で、外部との電気的な接続に利用される複数の電極パッドを形成し、
前記支持基板に、複数の前記電極パッドに対応する箇所に貫通孔を形成する
工程を含む製造方法。
(16)
複数の画素が平面的に配置される画素領域が設けられる半導体基板と、
前記半導体基板に対して積層され、複数の前記画素に接続される配線が設けられる配線層と、
前記配線層に対して接合され、前記半導体基板を支持する支持基板と
を有し、
前記配線層には、前記半導体基板を平面的に見て前記画素領域に重なり合う位置で、外部との電気的な接続に利用される複数の電極パッドが配置され、
前記支持基板には、複数の前記電極パッドに対応する箇所に貫通孔が設けられる
固体撮像素子を備える電子機器。
Claims (16)
- 複数の画素が平面的に配置される画素領域が設けられる半導体基板と、
前記半導体基板に対して積層され、複数の前記画素に接続される配線が設けられる配線層と、
前記配線層に対して接合され、前記半導体基板を支持する支持基板と
を備え、
前記配線層には、前記半導体基板を平面的に見て前記画素領域に重なり合う位置で、外部との電気的な接続に利用される複数の電極パッドが配置され、
前記支持基板には、複数の前記電極パッドに対応する箇所に貫通孔が設けられる
固体撮像素子。 - 前記配線層には、前記配線が多層構造で形成されており、前記配線よりも前記支持基板側に複数の前記電極パッドが配置される電極パッド層が設けられる
請求項1に記載の固体撮像素子。 - 前記電極パッドは、前記配線と異なる導体により形成される
請求項2に記載の固体撮像素子。 - 前記電極パッドは、前記配線層に多層構造で形成される前記配線の一部として、前記配線と同一の層に形成される
請求項1に記載の固体撮像素子。 - 前記電極パッドは、前記配線と同一の導体により形成される
請求項4に記載の固体撮像素子。 - 前記貫通孔の底面で前記電極パッドと電気的に接続され、前記貫通孔を通って前記支持基板の上面まで延在する貫通電極
をさらに備える請求項1に記載の固体撮像素子。 - 前記貫通電極は、前記貫通孔を導体で埋め込むことにより形成される
請求項6に記載の固体撮像素子。 - 前記貫通孔に絶縁膜を介して貫通電極となる導体が予め埋め込まれている前記支持基板と前記配線層とが互いの面どうしで接合されるとともに、前記貫通電極と前記電極パッドとが同一の導体どうしで接合される
請求項1に記載の固体撮像素子。 - 前記支持基板を貫通しない深さで形成されたビアに前記導体が埋め込まれ、前記支持基板を薄肉化して前記導体を頭出しすることにより前記貫通電極が形成される
請求項8に記載の固体撮像素子。 - 前記貫通電極に対応する前記支持基板の表面に電極パッドが配置される
請求項8に記載の固体撮像素子。 - 前記電極パッドに電気的に接続されるように前記支持基板の表面に形成されるはんだボールを利用し、他の基板に対してフリップチップボンディングされる
請求項1に記載の固体撮像素子。 - 前記支持基板を貫通して前記電極パッドに接続される貫通電極を形成した後に、前記半導体基板に対してカラーフィルタ層が積層される
請求項1に記載の固体撮像素子。 - 複数の前記電極パッドは、前記半導体基板を平面的に見たときにグリッド状に配置される
請求項1に記載の固体撮像素子。 - 前記半導体基板の裏面側から、前記画素が受光する光が照射される裏面照射型である
請求項1に記載の固体撮像素子。 - 複数の画素が平面的に配置される画素領域が設けられる半導体基板と、
前記半導体基板に対して積層され、複数の前記画素に接続される配線が設けられる配線層と、
前記配線層に対して接合され、前記半導体基板を支持する支持基板と
を備える固体撮像素子の製造方法において、
前記配線層に、前記半導体基板を平面的に見て前記画素領域に重なり合う位置で、外部との電気的な接続に利用される複数の電極パッドを形成し、
前記支持基板に、複数の前記電極パッドに対応する箇所に貫通孔を形成する
工程を含む製造方法。 - 複数の画素が平面的に配置される画素領域が設けられる半導体基板と、
前記半導体基板に対して積層され、複数の前記画素に接続される配線が設けられる配線層と、
前記配線層に対して接合され、前記半導体基板を支持する支持基板と
を有し、
前記配線層には、前記半導体基板を平面的に見て前記画素領域に重なり合う位置で、外部との電気的な接続に利用される複数の電極パッドが配置され、
前記支持基板には、複数の前記電極パッドに対応する箇所に貫通孔が設けられる
固体撮像素子を備える電子機器。
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TW201826512A (zh) | 2018-07-16 |
KR102493216B1 (ko) | 2023-01-30 |
CN109564929A (zh) | 2019-04-02 |
JP2022132350A (ja) | 2022-09-08 |
JPWO2018047635A1 (ja) | 2019-06-24 |
KR20190045187A (ko) | 2019-05-02 |
US20190221602A1 (en) | 2019-07-18 |
TWI800487B (zh) | 2023-05-01 |
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