WO2023074136A1 - 半導体装置、機器及び半導体装置の製造方法 - Google Patents
半導体装置、機器及び半導体装置の製造方法 Download PDFInfo
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- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
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- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
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Definitions
- this technology relates to semiconductor devices, equipment, and methods of manufacturing semiconductor devices.
- each of the first and second element chips is externally connected to the second element chip on the side opposite to the first element chip side by the through electrodes penetrating the first and second element chips. terminals are electrically connected.
- the integration degree of the elements in the second element chip was lowered due to the through electrodes penetrating the second element chip.
- the main object of the present technology is to provide a semiconductor device capable of improving the degree of integration of elements in the second element chip.
- the technology includes at least one first device chip; at least one chip stacked with the first element chip and smaller than the first element chip; with the at least one chip includes at least one second element chip;
- the first element chip has a laminated structure in which a first semiconductor substrate and a first wiring layer are laminated
- the second element chip has a laminated structure in which a second semiconductor substrate and a second wiring layer are laminated; the first wiring layer and the second wiring layer are joined to face each other; an external connection terminal disposed at a position further from the first element chip than a back surface of the chip, which is a surface opposite to the first element chip side, in the stacking direction; a wiring provided at least partially around the chip and electrically connecting the first wiring layer and the external connection terminal;
- a semiconductor device is provided, further comprising:
- the wiring may have at least one longitudinal wiring extending in the stacking direction.
- the wiring may have at least one horizontal wiring extending in an in-plane direction and connected to the vertical wiring.
- the at least one vertical wiring includes at least one first vertical wiring extending from the horizontal wiring to the first semiconductor substrate side and at least one vertical wiring extending from the horizontal wiring to the side opposite to the first semiconductor substrate side. and one second vertical wiring.
- the wiring may be provided at least on the side surface of the chip via an insulating film. One end of the wiring is electrically connected to the first wiring layer, and the other end is connected to the external connection terminal at a position farther from the first element chip than the back surface in the stacking direction.
- the semiconductor device may further include a buried film provided on at least one of the side surface side and the back surface side of the chip. The embedded film may be planarized.
- the embedded film may be provided on the rear surface side so as to partially cover the external connection terminals.
- the semiconductor device may further include an insulating layer that covers part of the embedded film and the external connection terminal and exposes the other part of the external connection terminal.
- the chip may have a shape in which the width becomes narrower as the distance from the first element chip increases.
- a longitudinal section of the chip may have a substantially tapered shape in which the width becomes narrower as the distance from the first element chip increases. Corners of the tip may be rounded.
- the at least one chip may include at least one dummy chip. At least a portion of the external connection terminal may not overlap the chip in plan view.
- the insulating film may further include a protective film provided only on the side surface side and covering the back surface of the chip.
- the semiconductor device may further include another protective film that covers part of the protective film and the external connection terminals and exposes other parts of the external connection terminals.
- the first element chip may be a pixel chip having a pixel region provided on the first semiconductor substrate.
- the first element chip may have a transparent substrate bonded to the first semiconductor substrate via an adhesive layer.
- the semiconductor device further includes a support substrate bonded to the chip via an insulating layer, the external connection terminal is provided on a side of the support substrate opposite to the insulating layer, and the wiring is connected to the insulating layer. You may have a penetration electrode which penetrates a layer and/or the said support substrate.
- the support substrate may have substantially the same size as the first element chip.
- the insulating layer is provided on the side surface side and the back surface side of the chip, and the wiring includes first through electrodes penetrating the insulating layer on the side surface side of the chip and second through electrodes penetrating the support substrate. and horizontal wirings disposed in the insulating layer and electrically connected to the first and second through electrodes.
- the support substrate may be a semiconductor substrate.
- An element may be provided on the semiconductor substrate.
- the insulating layer may be provided on the side surface side and the back surface side of the chip, and the through electrode may penetrate the insulating layer on the side surface side of the chip and the support substrate.
- An etching stop layer may be provided at least on a portion of the first wiring layer that is not joined to the second wiring layer.
- the first element chip may be a pixel chip in which a pixel region is provided on a first semiconductor substrate.
- the first element chip may have a transparent substrate bonded to the first semiconductor substrate via an adhesive layer.
- the present technology also provides equipment including the semiconductor device.
- a first method for manufacturing a semiconductor device is also provided, comprising: The first manufacturing method further includes the steps of: forming a buried film from a side of the second stacked body
- the at least one second laminate is a plurality of second laminates having different thicknesses
- the plurality of second stacked bodies may also be polished and flattened.
- a step of bonding a supporting substrate to the embedded film may be further included after the planarizing step.
- the first laminated body becomes a pixel chip, and after the step of bonding the supporting substrate, an antireflection film, a collar, and an antireflection film are formed on a side of the first semiconductor substrate opposite to the first wiring layer side.
- the step of forming at least one of a filter and an on-chip lens may also be included.
- the first wiring layer of a first laminate in which a first semiconductor substrate and a first wiring layer are laminated, and the first laminate in which a second semiconductor substrate and a second wiring layer are laminated a step of joining the second wiring layer of the second laminate with a smaller size face-to-face; forming a buried film from a side of the second laminate opposite to the first laminate; planarizing the buried film; etching the embedded film and the first wiring layer around the second laminate to form a via one end of which is connected to an in-layer wiring of the first wiring layer; forming a horizontal wiring electrically connected to the other end of the via on the surface of the buried film opposite to the second stacked body side; a step of covering the horizontal wiring with a protective film; disposing a support substrate on the side of the protective film opposite to the side of the first laminate; a step of forming a through-electrode connected to the horizontal wiring on the supporting substrate;
- a second method for manufacturing a semiconductor device comprising: The supporting substrate
- the first laminate becomes a pixel chip, and after the step of bonding the support substrate, an antireflection film, a collar, and an antireflection film are formed on a side of the first semiconductor substrate opposite to the first wiring layer side.
- the step of forming at least one of a filter and an on-chip lens may also be included.
- the first wiring layer of a first laminate in which a first semiconductor substrate and a first wiring layer are laminated, and the first laminate in which a second semiconductor substrate and a second wiring layer are laminated a step of joining the second wiring layer of the second laminate with a smaller size face-to-face; forming an etching stop layer from a side of the second laminate opposite to the first laminate; depositing a buried film from a side of the edging stop layer opposite to the first stack; planarizing the buried film; bonding a support substrate to the embedded film; forming a through electrode penetrating through the supporting substrate, the embedded film around the second laminate, and the etching stop layer;
- a third method for manufacturing a semiconductor device comprising: In the third manufacturing method, the first laminated body becomes a pixel chip, and after the step of bonding the supporting substrate, an antireflection film and a collar are formed on a side of the first semiconductor substrate opposite to the first wiring layer side. The step of forming at least one of
- FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; 2 is a flow chart for explaining a method of manufacturing the semiconductor device of FIG. 1; 4A to 4D are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 5A to 5C are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 6A to 6C are process cross-sectional views of the method of manufacturing the semiconductor device of FIG. 7A to 7C are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 8A and 8B are process cross-sectional views of the method for manufacturing the semiconductor device of FIG.
- FIG. 12 is a flow chart for explaining a method of manufacturing the semiconductor device of FIG. 12; 14A to 14D are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 15A to 15D are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. It is a sectional view of a semiconductor device concerning Example 6 of one embodiment of this art.
- FIG. 17 is a flow chart for explaining a method of manufacturing the semiconductor device of FIG. 16; 18A to 18C are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 19A to 19C are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 20A to 20C are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. It is a sectional view of a semiconductor device concerning Example 7 of one embodiment of this art. 22 is a flow chart for explaining a method of manufacturing the semiconductor device of FIG. 21; 23A to 23C are process cross-sectional views of the method of manufacturing the semiconductor device of FIG. 24A to 24C are process cross-sectional views of the method of manufacturing the semiconductor device of FIG.
- 25A to 25C are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 26A to 26C are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. It is a cross-sectional view of a semiconductor device according to Example 8 of one embodiment of the present technology. It is a cross-sectional view of a semiconductor device according to Example 9 of one embodiment of the present technology.
- FIG. 29 is the first half of a flowchart for explaining the method of manufacturing the semiconductor device of FIG. 28; 29 is the second half of the flowchart for explaining the method of manufacturing the semiconductor device of FIG. 28; 31A to 31C are process cross-sectional views of the method for manufacturing the semiconductor device of FIG.
- FIG. 32A and 32B are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 33A and 33B are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 34A and 34B are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 35A and 35B are process cross-sectional views of the method for manufacturing the semiconductor device of FIG.
- FIG. 20 is a cross-sectional view of a semiconductor device according to Example 10 of one embodiment of the present technology; 37 is a flowchart for explaining a method of manufacturing the semiconductor device of FIG. 36; 38A to 38D are process cross-sectional views of the method of manufacturing the semiconductor device of FIG. 39A to 39C are process cross-sectional views of the method of manufacturing the semiconductor device of FIG.
- FIG. 40A to 40C are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 11 is a cross-sectional view of a semiconductor device according to Example 11 of an embodiment of the present technology
- FIG. 47A and 47B are process cross-sectional views of the method for manufacturing the semiconductor device of FIG. 48A and 48B are process cross-sectional views of the manufacturing method of the semiconductor device of FIG. It is a figure which shows the usage example of the solid-state imaging device to which this technique is applied.
- 1 is a functional block diagram of an example of an electronic device including a solid-state imaging device to which the present technology is applied;
- FIG. 1 is a block diagram showing an example of a schematic configuration of a vehicle control system;
- FIG. FIG. 4 is an explanatory diagram showing an example of installation positions of an outside information detection unit and an imaging unit;
- 1 is a diagram showing an example of a schematic configuration of an endoscopic surgery system;
- FIG. 3 is a block diagram showing an example of functional configurations of a camera head and a CCU;
- a semiconductor device according to Example 1 of an embodiment of the present technology 2. A semiconductor device according to Example 2 of an embodiment of the present technology; 4. A semiconductor device according to Example 3 of an embodiment of the present technology; 4. A semiconductor device according to Example 4 of an embodiment of the present technology; 6. A semiconductor device according to Example 5 of an embodiment of the present technology. 7. A semiconductor device according to Example 6 of an embodiment of the present technology. 8. A semiconductor device according to Example 7 of an embodiment of the present technology. 9. A semiconductor device according to Example 8 of an embodiment of the present technology.
- a semiconductor device 10 according to Example 9 of an embodiment of the present technology A semiconductor device 11. according to Example 10 of an embodiment of the present technology.
- vias (penetrating electrodes) penetrating the small chip reduce the degree of integration of elements (for example, transistors) in the small chip.
- the small chip needs to be thickened in order to ensure mechanical strength, the diameter of the external connection wiring must be increased from the viewpoint of manufacturing difficulty, which is a trade-off with the degree of integration.
- the inventor devised a layout of wiring (external connection wiring) that connects chips and the outside in a semiconductor device in which chips of different sizes are stacked, and developed the present technology. We have developed such a semiconductor device.
- FIG. 1 is a cross-sectional view of a semiconductor device 10 according to Example 1 of one embodiment of the present technology.
- FIG. 2 is a cross-sectional view taken along line AA of FIG.
- the upper side in cross-sectional views such as FIG. 1 is referred to as "upper", and the lower side as "lower”.
- the semiconductor device 10 includes at least one (for example, one) first element chip 100 and at least one chip stacked with the first element chip 100 and smaller than the first element chip. and
- the at least one chip includes at least one (eg, multiple) second element chip 200 .
- element chip means a chip provided with an element.
- the direction in which the first element chip 100 and the chips are stacked is also referred to as a "stacking direction”.
- Examples of the first element chip 100 include a pixel chip, logic chip, memory chip, AI chip, interface chip, and the like.
- the thickness of the first element chip 100 is, for example, 3 to 300 ⁇ m.
- the first element chip 100 is a pixel chip.
- the interface chip is an element chip that inputs and outputs signals.
- An AI chip is an element chip having a learning function by AI (artificial intelligence).
- a pixel chip as an example of the first element chip 100 includes, for example, a plurality of pixels that are two-dimensionally arranged (for example, arranged in a matrix). Each pixel has a photoelectric conversion element.
- the photoelectric conversion element is, for example, a PD (photodiode). More specifically, the photoelectric conversion element is, for example, a PN photodiode, a PIN photodiode, a SPAD (Single Photo Avalanche Photodiode), an APD (avalanche photo Diode), or the like.
- Each pixel is, for example, a back-illuminated pixel that is irradiated with light from the back surface (the surface opposite to the first wiring layer 100b side) of the first semiconductor substrate 100a.
- a region in which a plurality of pixels are arranged in the first semiconductor substrate 100a is also called a "pixel region”.
- the plurality of pixels, a control circuit (analog circuit) for controlling each pixel, and an A/D conversion circuit (analog circuit) are formed on the first semiconductor substrate 100a.
- the control circuit has circuit elements such as transistors. More specifically, the control circuit includes, for example, a plurality of pixel transistors (so-called MOS transistors).
- a plurality of pixel transistors can be composed of, for example, three transistors, a transfer transistor, a reset transistor, and an amplification transistor.
- a pixel can be configured as one unit pixel.
- the pixels can also have a shared pixel structure. This pixel-sharing structure is a structure in which a plurality of photodiodes share a floating diffusion that constitutes a transfer transistor and a transistor other than the transfer transistor.
- the A/D conversion circuit converts the analog signal generated by each pixel of the pixel chip into a digital signal.
- Examples of the second element chips 200 include logic chips, memory chips, analog chips, AI chips, interface chips, and the like.
- the plurality of second element chips 200 may include chips having the same function, or may include chips having different functions.
- one second element chip 200 is a logic chip having a logic circuit
- the other second element chip 200 is a memory chip having a memory circuit.
- the logic circuit processes the digital signal generated by the A/D conversion circuit.
- the memory circuit temporarily stores and holds the digital signal generated by the A/D conversion circuit and/or the digital signal processed by the logic circuit.
- each second element chip 200 is, for example, 2 to 100 ⁇ m.
- the size and/or thickness of the plurality of second element chips 200 may be the same or different.
- the first element chip 100 has a laminated structure in which a first semiconductor substrate 100a and a first wiring layer 100b are laminated.
- the second element chip 200 has a laminated structure in which a second semiconductor substrate 200a and a second wiring layer 200b are laminated. The first wiring layer 100b and the second wiring layer 200b are joined face to face.
- the first semiconductor substrate 100a is, for example, a Si substrate, a Ge substrate, a GaAs substrate, an InGaAs substrate, or the like.
- the first wiring layer 100b may be manufactured, for example, in a pre-process of a semiconductor manufacturing process, or may be a redistribution line (RDL).
- the first wiring layer 100b includes an insulating layer 100b1 and an internal wiring 100b2 (intralayer wiring) provided in the insulating layer 100b1.
- the first wiring layer 100b may be a single-layer wiring layer in which the internal wiring 100b2 is provided in a single layer within the insulating layer 100b1, or may be a multilayer wiring layer in which the internal wiring 100b2 is provided in multiple layers within the insulating film 100b1.
- the insulating layer 100b1 is made of, for example, a silicon oxide film, a silicon nitride film, or the like.
- the internal wiring 100b2 is made of, for example, copper (Cu), aluminum (Al), tungsten (W), or the like.
- the second semiconductor substrate 200a is, for example, a Si substrate, a Ge substrate, a GaAs substrate, an InGaAs substrate, or the like.
- the second wiring layer 200b may be manufactured, for example, in a pre-process of the semiconductor manufacturing process, or may be a redistribution line (RDL).
- the second wiring layer 200b includes an insulating layer 200b1 and an internal wiring 200b2 (in-layer wiring) provided in the insulating layer 200b1.
- the second wiring layer 200b may be a single-layer wiring layer in which the internal wiring 200b2 is provided in a single layer within the insulating layer 200b1, or may be a multilayer wiring layer in which the internal wiring 200b2 is provided in multiple layers within the insulating film 200b1.
- the insulating layer 200b1 is made of, for example, a silicon oxide film, a silicon nitride film, or the like.
- the internal wiring 200b2 is made of, for example, copper (Cu), aluminum (Al), tungsten (W), or the like.
- the external connection terminals are further arranged at positions farther from the first element chip 100 than the back surface of the second element chip 200 opposite to the first element chip 100 side in the stacking direction. 700.
- the external connection terminals 700 are, for example, solder bumps, conductive film pillars, or the like.
- the semiconductor device 10 further includes wirings 400 as external connection wirings that electrically connect the first wiring layer 100a and the external connection terminals 700 .
- a plurality of wirings 400 are provided at intervals along the outer peripheral surface of the second element chip 200 (for example, the semiconductor substrate 200a).
- a plurality of external connection terminals 700 are also provided corresponding to the plurality of wirings 400 .
- each external connection terminal 700 is provided at a position where at least a part (for example, the whole) overlaps with the second element chip 200 in plan view.
- the wiring 400 is provided at least partially (eg, entirely) around the second element chip 200 .
- the wiring 400 is provided at least on the side surface of the second element chip 200 with the insulating film 300 interposed therebetween.
- the insulating film 300 covers the side and back surfaces of the second element chip 200, for example.
- the insulating film 300 also covers the portion of the first wiring layer 100 b of the first element chip 100 around the second element chip 200 .
- the insulating film 300 As the insulating film 300, an inorganic film made of SiO 2 , SiON, SiN, SiOC, SiCN, or the like, or an organic film made of a resin having a skeleton of silicone, polyimide, acrylic, epoxy, or the like is used.
- the film thickness of the insulating film 300 is preferably about 0.1 to 10 ⁇ m, for example.
- the wiring 400 has one end electrically connected to the first wiring layer 100b, and the other end is located closer to the first element chip 100 than the back surface of the second element chip 200 of the insulating film 300 in the stacking direction. is electrically connected to the external connection terminal 700 at a position away from (for example, a portion of the insulating film 300 covering the back surface of the second element chip 200).
- the wiring 400 has, for example, a via portion 400a (vertical wiring) and a wiring portion 400b.
- the via portion 400a penetrates the insulating film 300 and has one end connected to the wiring 100b2 within the insulating layer 100b1.
- the wiring portion 400b is crank-shaped and includes one vertical wiring and two horizontal wirings extending along the first and second element chips 100 and 200. One end of the wiring portion 400b extends to the other end of the via portion 400a. , and the other end is connected to the external connection terminal 700 .
- vertical wiring means wiring extending in the stacking direction
- horizontal wiring means wiring extending in the in-plane direction (direction orthogonal to the stacking direction).
- the wiring 400 has a single layer structure or a multilayer structure made of at least one of Cu, Ti, Ta, Al, W, Ni, Ru and Co, for example.
- the wiring 400 preferably has a thickness of about 0.3 to 10 ⁇ m and a width of about 1 to 40 ⁇ m.
- the semiconductor device 10 further includes embedded films 500 provided on the side surfaces of each of the plurality of element chips 200 and on the back side of the element chips 200 .
- the embedded film 500 is planarized as an example.
- the embedded film 500 embeds a portion (specifically, the base end portion) of the external connection terminal 700 .
- the embedded film 500 is composed of an inorganic film made of, for example, SiO 2 , SiON, SiN, SiOC, or SiCN, or an organic film made of a molding material containing resin or filler having a skeleton of silicone, polyimide, acrylic, or epoxy, for example. .
- the semiconductor device 10 further includes a protective film 600 covering the embedded film 500 .
- the protective film 600 exposes the tips of the external connection terminals 700 . That is, the external connection terminals 700 protrude downward from within the protective film 600 .
- the protective film 600 may be made of the same material as the embedded film 500, or may be made of a different material. Note that the protective film 600 may not be provided. In this case, the embedded film 500 may be provided on the rear surface side of the element chip 200 so as to cover part of the external connection terminals 700 and expose the other part.
- a first element chip 100 and a plurality of second element chips 200 are prepared (see FIGS. 4A and 4B).
- the first element chip 100 is produced by forming elements on a first semiconductor substrate 100a by photolithography and forming a first wiring layer 100b on the first semiconductor substrate 100a.
- a plurality of second element chips 200 are formed by photolithography to form elements for each chip on a wafer that will be the second semiconductor substrate 200a, and after forming a wiring film that will be the second wiring layer 200b on the wafer, by dicing. It is generated by separating each chip.
- the first element chip 100 and the plurality of second element chips 200 are bonded (see FIG. 4C). Specifically, the first wiring layer 100b of the first element chip 100 and the second wiring layer 200b of the second element chip 200 are directly bonded by, for example, metal bonding so as to face each other.
- an insulating film 300 is formed (see FIG. 4D).
- the insulating film 300 is formed by PE-CVD (Plasma-Enhanced Chemical Vapor Deposition) or ALD (Atomic Layer Deposition).
- a first contact hole CH1 is formed (see FIG. 5A). Specifically, by photolithography and plasma etching, the insulating film 300 and the insulating film 100b1 of the first wiring layer 100b are opened to form the first contact hole CH1. As a result, the internal wiring 100b2 of the first wiring layer 100b is exposed through the first contact hole CH1.
- wiring 400 is formed.
- the wiring 400 is formed by a so-called semi-additive method.
- a Cu film is formed as a seed metal film on the Ti film to form a metal film MF (see FIG. 5B).
- a resist pattern R is formed to cover areas where the wiring 400 is not formed (see FIG. 5C).
- electroplating is performed using the resist pattern R as a mask to form metal plating MP (for example, Cu plating) (see FIG. 6A).
- the resist is removed (see FIG. 6B), and the metal film MF covering the portion where the wiring 400 is not formed is removed by wet etching (see FIG. 6C).
- wiring 400 made of metal plating MP is formed.
- a buried film 500 is formed and planarized (see FIG. 7A). Specifically, after the buried film 500 is formed by the PE-CVD method, the buried film 500 is polished and planarized by a grinder, a CMP apparatus, or the like.
- a second contact hole CH2 is formed (see FIG. 7B). Specifically, by photolithography and dry etching, the buried film 500 is opened to form the second contact hole CH2. As a result, the wiring 400 is exposed through the second contact hole CH2.
- a protective film 600 is formed (see FIG. 7C). Specifically, for example, a photosensitive resin material is deposited as the protective film 600 .
- a third contact hole CH3 is formed (see FIG. 8A).
- the protective film 600 is patterned by photolithography to open a portion corresponding to the second contact hole CH2 to form the third contact hole CH3.
- the wiring 400 is exposed through the second and third contact holes CH2 and CH3.
- the external connection terminals 700 are formed (see FIG. 8B). Specifically, external connection terminals 700 (for example, solder balls) are formed in the second and third contact holes CH2 and CH3 by ball mounting so as to be connected to the wiring 400 .
- external connection terminals 700 for example, solder balls
- the semiconductor device 10 according to the first embodiment includes at least one first element chip 100, and a plurality of (for example) two second element chips 200 stacked on the first element chip 100 and smaller than the first element chip 100.
- the first element chip 100 has a laminated structure in which a first semiconductor substrate 100a and a first wiring layer 100b are laminated
- the second element chip 200 has a laminated structure in which a second semiconductor substrate 200a and a second wiring layer 200b are laminated.
- the first wiring layer 100b and the second wiring layer 200b are joined face to face.
- the external connection terminals 700 are provided at positions farther from the first element chip 100 than the back surface of the second element chip 200 opposite to the first element chip 100 side in the stacking direction.
- the wiring 400 is provided at least partially around the second element chip 200 and electrically connects the first wiring layer 100b and the external connection terminal 700 .
- the wiring 400 as the external connection wiring does not pass through the second element chip 200, a sufficient space for element arrangement in the second element chip 200 can be secured.
- the semiconductor device 10 it is possible to provide a semiconductor device capable of improving the degree of integration of the elements in the second element chip 200.
- the semiconductor device 10 for example, when the second element chip 200 needs to be thickened in order to ensure mechanical strength, the diameter of the wiring 400 as the external connection wiring is increased from the viewpoint of manufacturing difficulty. However, the degree of integration of devices in the second device chip 200 can be improved.
- the semiconductor device 10 since it is not necessary to provide a through hole in the second element chip 200, manufacturing is facilitated. This effect increases as the thickness of the second element chip 200 increases.
- the wiring 400 may be provided on at least the side surface of the second element chip 200 with the insulating film 300 interposed therebetween. Thereby, the wiring 400 can be provided along at least the side surface of the second element chip 200 while being insulated from the second element chip 200 .
- the insulating film 300 covers the side and back surfaces of the second element chip 200, and the wiring 400 has one end electrically connected to the first wiring layer 100b and the other end extending from the second element chip 200 in the stacking direction. is connected to the external connection terminal 700 at a position farther from the first element chip 100 than the rear surface of the . Thereby, the first wiring layer 100b and the external connection terminals 700 can be electrically connected with a simple wiring structure.
- the semiconductor device 10 further includes embedded films 500 provided on the side and back sides of each of the plurality of second element chips 200 .
- embedded films 500 provided on the side and back sides of each of the plurality of second element chips 200 .
- the buried film 500 is preferably planarized. This makes it easier to bond the surface of the semiconductor device 10 on the buried film 500 side to the outside (for example, a circuit board or the like).
- the semiconductor device 10 further includes a protective film 600 that covers the embedded film 500 and exposes the tips of the external connection terminals 700 .
- a protective film 600 that covers the embedded film 500 and exposes the tips of the external connection terminals 700 .
- the method for manufacturing the semiconductor device 10 according to the first embodiment includes a first wiring layer 100b of a first laminate in which a first semiconductor substrate 100a and a first wiring layer 100b are laminated, a second semiconductor substrate 200a and a second wiring layer. joining the second wiring layer 200b of the second laminate smaller than the first laminate face-to-face; forming an insulating film 300 from the side of the second laminate; a step of etching the insulating film 300 and the first wiring layer 100b around the laminate to expose the internal wiring 100b2 of the first wiring layer 100b; and forming 400 .
- the semiconductor device 10 capable of improving the degree of integration of the elements in the second element chip 200 can be manufactured.
- the method of manufacturing the semiconductor device 10 further includes a step of forming the buried film 500 from the side of the second stacked body opposite to the first stacked body side, and a step of polishing and planarizing the buried film 500 . This makes it easier to bond the surface of the semiconductor device 10 on the buried film 500 side to the outside (for example, a circuit board or the like).
- FIG. 9 is a cross-sectional view of a semiconductor device 20 according to Example 2 of one embodiment of the present technology.
- the semiconductor device 20 according to the second embodiment has a substantially tapered vertical cross-section of the second element chip 200B, the width of which becomes narrower as the distance from the first element chip 100 increases. It has the same configuration as the semiconductor device 10 according to Example 1.
- FIG. 9 is a cross-sectional view of a semiconductor device 20 according to Example 2 of one embodiment of the present technology.
- the semiconductor device 20 according to the second embodiment has a substantially tapered vertical cross-section of the second element chip 200B, the width of which becomes narrower as the distance from the first element chip 100 increases. It has the same configuration as the semiconductor device 10 according to Example 1.
- FIG. 9 is a cross-sectional view of a semiconductor device 20 according to Example 2 of one embodiment of the present technology.
- the semiconductor device 20 according to the second embodiment has a substantially tapered vertical cross-section of the second element chip 200B, the width of which becomes narrower as the distance from the
- both the vertical cross sections of the second semiconductor substrate 200a1 and the second wiring layer 200b1 are substantially tapered, and the vertical cross section as a whole is also substantially tapered.
- the corners of the top (the portion closest to the first element chip 100) and/or the bottom (the portion farthest from the first element chip 100) of the second element chip 200B may be rounded.
- the substantially tapered shape of the second element chip 200B can be formed, for example, by dry etching, dicing, or the like.
- the longitudinal section of the second element chip 200B has a substantially tapered shape, the lithography process when forming the wiring 400 on the side surface side of the second element chip 200B is easy (particularly, exposure is easy). ), and high integration of the wiring 400 and improvement in yield can be expected.
- the corners of the second element chip 200B are rounded, concentration of the electric field on the insulating film 300 can be avoided, and reliability can be further improved.
- FIG. 10 is a cross-sectional view of a semiconductor device 30 according to Example 3 of one embodiment of the present technology.
- at least one chip includes a second element chip 200 and at least one (for example, one) dummy chip 200C (a chip having no element). ) is the same as that of the semiconductor device 10 according to the first embodiment.
- the dummy chip 200C has the same structure as the second element chip 200 except that no elements are formed on the second semiconductor substrate 200a and no internal wiring 200b2 is formed in the insulating layer 200b1. .
- the wiring 400 is also provided in the dummy chip 200 ⁇ /b>C as in the second element chip 200 .
- the wiring 400 is also arranged in the dummy chip 200C (where the second element chip 200 is not arranged), the degree of freedom in design can be improved.
- FIG. 11 is a cross-sectional view of a semiconductor device 40 according to Example 4 of one embodiment of the present technology.
- a part of the plurality of external connection terminals 700 is provided at a location not overlapping at least the second element chip 200 in plan view. Except for this, the configuration is similar to that of the semiconductor device 10 according to the first embodiment.
- all of the plurality of external connection terminals 700 may be provided at least at locations that do not overlap with the second element chip 200 in plan view.
- the plurality of external connection terminals 700 may include external connection terminals 700 that partly overlap (the other part does not overlap) with the second element chip or the dummy chip in plan view.
- the wiring 400D penetrates the embedded film 500 on the opposite side (rear surface side) of the second element chip 200 to the first element chip 100 side, has a via portion 400c connected to one end of the wiring portion 400b, and a horizontal wiring portion 400d extending in the in-plane direction within the protective film 600 and having one end connected to the other end of the via portion 400c.
- the horizontal wiring portion 400 d has the other end connected to the external connection terminal 700 within the protective film 600 .
- the external connection terminal 700 protrudes downward from within the protective film 600 and has its tip exposed.
- the semiconductor device 40 can be manufactured by the same manufacturing method as the semiconductor device 10 according to the first embodiment, except that a step of forming the via portion 400c and the horizontal wiring portion 400d is added.
- the external connection terminals 700 can be arranged even in a place that does not overlap with the second element chip 200 in plan view, which is advantageous for high integration of external connection wirings and external connection terminals.
- FIG. 12 is a cross-sectional view of a semiconductor device 50 according to Example 5 of one embodiment of the present technology.
- a semiconductor device 50 according to Example 5 as shown in FIG. It has substantially the same configuration as the semiconductor device 10 according to the first embodiment, except that it is provided.
- the protective film 550 may be made of the same material as, for example, the insulating film 300 and the embedded film 500, or may be made of a different material (dielectric material).
- the wiring 400E includes, in addition to the via portion 400a, a wiring portion 400b (a wiring portion including vertical wiring and horizontal wiring) having a substantially L-shaped cross section and having one end connected to the via portion 400a.
- a horizontal wiring portion 400c having one end connected to the other end of the wiring portion 400b and extending in the horizontal direction within the protective film 600 is provided.
- the horizontal wiring portion 400 c has the other end connected to the external connection terminal 700 within the protective film 600 .
- the external connection terminal 700 protrudes downward from within the protective film 600 and has its tip exposed.
- first wiring the via portion 400 and the wiring portion 400b are collectively referred to as "first wiring”
- the horizontal wiring portion 400c is also referred to as "second wiring”.
- some of the external connection terminals 700 are arranged at positions overlapping the second element chips 200, and other parts of the external connection terminals 700 are arranged at positions not overlapping with the second element chips 200. are placed.
- the insulating film 300 is not provided on the side of the second element chip 200 opposite to the first element chip 100 side.
- the first element chip 100 and the chip base material 200m to be each of the second element chips 200 are prepared.
- the chip substrate 200m has a laminated structure in which a second semiconductor substrate 200a and a second wiring layer 200b are laminated. Each chip substrate 200m has a different thickness (for example, the thickness of the second semiconductor substrate 200a).
- the first element chip 100 is produced by forming elements on a first semiconductor substrate 100a by photolithography and forming a first wiring layer 100b on the first semiconductor substrate 100a.
- the thicker chip substrate 200m is produced by forming elements on the thicker second semiconductor substrate 200a by photolithography and forming the second wiring layer 200b on the second semiconductor substrate 200a.
- the thin chip substrate 200m is produced by forming elements on the thin second semiconductor substrate 200a by photolithography and forming the second wiring layer 200b on the second semiconductor substrate 200a.
- the first element chip 100 and the plurality of chip substrates 200m are bonded (see FIG. 4C). Specifically, the first wiring layer 100b of the first element chip 100 and the second wiring layer 200b of the chip substrate 200m are directly bonded by, for example, metal bonding so as to face each other.
- an insulating film 300 is formed (see FIG. 4D).
- the insulating film 300 is formed by PE-CVD (Plasma-Enhanced Chemical Vapor Deposition) or ALD (Atomic Layer Deposition).
- a first contact hole CH1 is formed (see FIG. 5A). Specifically, by photolithography and plasma etching, the insulating film 300 and the insulating film 100b1 of the first wiring layer 100b are opened to form the first contact hole CH1. As a result, the wiring 100b2 of the first wiring layer 100b is exposed through the first contact hole CH1.
- the first wiring is formed (see FIG. 5B). Specifically, the first wiring (via portion 400a and wiring portion 400b) is formed by a so-called semi-additive method.
- a Cu film is formed as a seed metal film on the Ti film to form a metal film MF.
- a resist pattern R is formed to cover areas where the first wiring is not formed (see FIG. 5C).
- electroplating is performed using the resist pattern R as a mask to form metal plating MP1 (for example, Cu plating) (see FIG. 6A).
- the resist is removed (see FIG. 6B), and the metal film MF covering the portion where the first wiring is not formed is removed by wet etching (see FIG. 6C). As a result, a first wiring made of metal plating MP1 is formed.
- a buried film 500 is formed (see FIG. 14A).
- the buried film 500 is formed by PE-CVD, for example.
- a flat surface is formed in which the first wiring, the insulating film 300 and the second semiconductor substrate 200b are exposed (see FIG. 14B).
- the embedded film 500 and the plurality of second semiconductor substrates 200a having different thicknesses are ground and polished by a grinder, a CMP apparatus, or the like to form a flat surface.
- the plurality of second semiconductor substrates 200a are also planarized. As a result, a plurality of second element chips 200 having the same thickness are produced.
- a protective film 550 is formed as a first protective film (see FIG. 14C).
- the protective film 550 is formed by PE-CVD, for example.
- a second contact hole CH2 is formed (see FIG. 14D). Specifically, by photolithography and dry etching, the protective film 550 is opened to form the second contact hole CH2. As a result, the first wiring (metal plating MP1) is exposed through the second contact hole CH2.
- a second wiring is formed (see FIG. 15A). Specifically, the metal plating MP2 as the second wiring, which is connected to the metal plating MP1 as a part of the first wiring, is overlapped with the second element chip 200 by the semi-additive method in the same manner as the first wiring. A metal plating MP2 as a second wiring is formed so as not to overlap the second element chip 200, which is connected to the metal plating MP1 as the first wiring of another part.
- a second protective film is deposited (see FIG. 15B). Specifically, a protective film 600 made of, for example, a photosensitive resin material is formed as the second protective film.
- a third contact hole CH3 is formed (see FIG. 15C). Specifically, a portion of the protective film 600 corresponding to the metal plating MP2 as the second wiring is opened by patterning by photolithography to form the third contact hole CH3. As a result, the metal plating MP2 is exposed through the third contact hole CH3.
- the external connection terminals 700 are formed (see FIG. 15D). Specifically, an external connection terminal 700 (for example, a solder ball) is formed in the third contact hole CH3 by ball mounting so as to be connected to the metal plating MP2.
- an external connection terminal 700 for example, a solder ball
- the semiconductor device 50 even if the thickness of the chip base material 200m to be each second element chip 200 is different, the semiconductor device 50 has the same structure as the semiconductor device 10 according to the first embodiment. equipment can be provided. In other words, the semiconductor device 50 has a high degree of freedom in selecting the chip base material 200m used to generate the second element chip 200 .
- FIG. 16 is a cross-sectional view of a semiconductor device 60 according to Example 6 of one embodiment of the present technology.
- each pixel in the pixel region of the pixel chip as the first element chip 100 has a color filter 910 and a microlens 920 (on-chip lens). It has substantially the same configuration as the semiconductor device 10 according to the first embodiment except for the points.
- An antireflection film may be provided in the pixel region.
- the first semiconductor device 100a is thinned to about 3 to 30 ⁇ m.
- the semiconductor device 60 further includes a transparent substrate 940 bonded to the surface of the pixel chip 100 on the side of the plurality of microlenses 920 via an adhesive layer 930 .
- the adhesive layer 930 is not limited to the entire surface, and may be provided, for example, only in the peripheral area of the pixel area.
- a first element chip 100 and a plurality of second element chips 200 are prepared (see FIGS. 4A and 4B).
- the first element chip 100 is produced by forming elements on a first semiconductor substrate 100a by photolithography and forming a first wiring layer 100b on the first semiconductor substrate 100a.
- a plurality of second element chips 200 are formed by photolithography to form elements for each chip on a wafer that will be the second semiconductor substrate 200a, and after forming a wiring film that will be the second wiring layer 200b on the wafer, by dicing. It is generated by separating each chip.
- the first element chip 100 and the plurality of second element chips 200 are bonded (see FIG. 4C). Specifically, the first wiring layer 100b of the first element chip 100 and the second wiring layer 200b of the second element chip 200 are directly bonded by, for example, metal bonding so as to face each other.
- an insulating film 300 is formed (see FIG. 4D).
- the insulating film 300 is formed by PE-CVD (Plasma-Enhanced Chemical Vapor Deposition) or ALD (Atomic Layer Deposition).
- a first contact hole CH1 is formed (see FIG. 5A). Specifically, by photolithography and plasma etching, the insulating film 300 and the insulating film 100b1 of the first wiring layer 100b are opened to form the first contact hole CH1. As a result, the wiring 100b2 of the first wiring layer 100b is exposed through the first contact hole CH1.
- wiring 400 is formed. Specifically, the wiring 400 is formed by a so-called semi-additive method. First, after forming a Ti film as a barrier metal film by the PE-PVD method, a Cu film is formed as a seed metal film on the Ti film to form a metal film MF (see FIG. 5B). Next, by photolithography, a resist pattern R is formed to cover areas where the wiring 400 is not formed (see FIG. 5C). Next, electroplating is performed using the resist pattern R as a mask to form metal plating MP (for example, Cu plating) (see FIG. 6A). Next, the resist is removed (see FIG. 6B), and the metal film MF covering the portion where the wiring 400 is not formed is removed by wet etching (see FIG. 6C). As a result, wiring 400 is formed.
- a semi-additive method First, after forming a Ti film as a barrier metal film by the PE-PVD method, a Cu film is formed as a seed metal film on the Ti film to
- a buried film 500 is formed and planarized (see FIG. 7A). Specifically, after the buried film 500 is formed by the PE-CVD method, the buried film 500 is flattened by a grinder, a CMP apparatus, or the like.
- the support substrate SB is bonded with an adhesive G (see FIG. 18A).
- the thickness of the first element chip 100 is reduced (see 18B). Specifically, the back surface (upper surface) of the first semiconductor substrate 100a of the first element chip 100 is ground and polished by, for example, a grinder, a CMP apparatus, or the like to reduce the thickness of the first element chip 100 to, for example, 10 ⁇ m.
- an antireflection film, color filters 910 and microlenses 920 are formed (see FIG. 18C).
- the transparent substrate 940 is bonded via the adhesive layer 930 (see FIG. 19A).
- the support substrate SB and the adhesive G are removed (see FIG. 19B).
- a second contact hole CH2 is formed (see FIG. 19C). Specifically, by photolithography and dry etching, the buried film 500 is opened to form the second contact hole CH2. As a result, the wiring 400 (metal plating MP) is exposed through the second contact hole CH2.
- a protective film 600 is formed (see FIG. 20A). Specifically, for example, a photosensitive resin material is deposited as the protective film 600 .
- a third contact hole CH3 is formed (see FIG. 20B). Specifically, by photolithography and dry etching, the protective film 600 is opened at portions corresponding to the second contact holes CH2 to form the third contact holes CH3. As a result, part of the wiring 400 (metal plating MP) is exposed through the second and third contact holes CH2 and CH3.
- the external connection terminals 700 are formed (see FIG. 20C). Specifically, the external connection terminals 700 (for example, solder balls) are formed in the second and third contact holes CH2 and CH3 by ball mounting so as to be connected to the wiring 400 (metal plating MP).
- the external connection terminals 700 for example, solder balls
- the semiconductor device 60 bonding between chips and formation of the insulating film 300, the wiring 400, and the embedded film 500 are possible before forming color filters and on-chip lenses, which are subject to process temperature restrictions. A high-quality and highly reliable semiconductor device can be realized. Further, when the first element chip 100 is a pixel chip, the thickness of the first element chip 100 needs to be, for example, 30 ⁇ m or less. Therefore, the layout of the external connection wiring of this technology is very effective.
- FIG. 21 is a cross-sectional view of a semiconductor device 70 according to Example 7 of one embodiment of the present technology.
- a semiconductor device 70 according to the seventh embodiment includes a support substrate 560 bonded to the second element chip 200 via an insulating layer including a buried film 500 and a protective film 550, as shown in FIG.
- the external connection terminals 700 are provided on the side opposite to the insulating layer side of the support substrate 560 .
- the support substrate 560 has approximately the same size as the first element chip 100, for example.
- the support substrate 560 is, for example, a semiconductor substrate (eg, silicon substrate).
- An insulating layer including the embedded film 500 and the protective film 550 is provided on the side surface side of the second element chip 200 and the back surface side of the second element chip 200 .
- the wiring 400G includes first through electrodes 400a1 (vertical wiring) penetrating the insulating layer on the side surface side of the second element chip 200, second through electrodes 400c1 (vertical wiring) penetrating the supporting substrate 560, and It has a horizontal wire 400b1 arranged and electrically connected to the first and second through electrodes 400a1 and 400c1.
- the first through electrode 400a1 penetrates the embedded film 500 of the insulating layer in the stacking direction, and one end is connected to the internal wiring 100b2 of the first wiring layer 100b.
- the horizontal wiring 400b1 extends in the in-plane direction within the protective film 550 of the insulating layer, and one end thereof is connected to the other end of the first through electrode 400a1.
- the second through electrode 400c1 penetrates the support substrate 560 in the stacking direction, has one end connected to the other end of the horizontal wiring 400b1 within the protective film 550, and has the other end connected to the external connection terminal 700 within the protective film 600. It is connected.
- An insulating film 570 is provided between the supporting substrate 560 and the second through electrode 400c1 and between the supporting substrate 560 and the protective film 600. As shown in FIG.
- the insulating film 570 may be made of the same material as the protective film 600, or may be made of a different material (dielectric).
- the thickness of the first element chip 100 is preferably about 3 to 100 ⁇ m, and the thickness of the second element chip 200 is preferably about 2 to 50 ⁇ m. This is effective when the chip 200 is thin.
- the thickness of the support substrate 560 is preferably about 30 to 200 ⁇ m.
- the diameter of via portion 400a1 is preferably about 0.1 to 10 ⁇ m.
- Each through electrode preferably has a diameter of about 3 to 60 ⁇ m and an aspect ratio of 10 or less.
- a first element chip 100 and a plurality of second element chips 200 are prepared (see FIGS. 4A and 4B).
- the first element chip 100 is produced by forming elements on a first semiconductor substrate 100a by photolithography and forming a first wiring layer 100b on the first semiconductor substrate 100a.
- a plurality of second element chips 200 are formed by photolithography to form elements for each chip on a wafer that will be the second semiconductor substrate 200a, and after forming a wiring film that will be the second wiring layer 200b on the wafer, by dicing. It is generated by separating each chip.
- the first element chip 100 and the plurality of second element chips 200 are bonded (see FIG. 23A). Specifically, the first wiring layer 100b of the first element chip 100 and the second wiring layer 200b of the second element chip 200 are directly bonded by, for example, metal bonding so as to face each other.
- a buried film 500 is formed and planarized (see FIG. 23B). Specifically, after the buried film 500 is formed by the PE-CVD method, the buried film 500 is ground and polished by a grinder, a CMP apparatus, or the like to be planarized.
- the first through holes TH1 are formed (see FIG. 23C). Specifically, by photolithography and plasma etching, the buried film 500 and the insulating film 100b1 of the first wiring layer 100b are opened to form the first through holes TH1. As a result, the internal wiring 100b2 of the first wiring layer 100b is exposed through the first through hole TH1.
- the first wiring is formed (see FIG. 24A). Specifically, the first wiring composed of the first through electrode 400a1 and the horizontal wiring 400b1 is formed by a so-called semi-additive method. First, after forming a Ti film as a barrier metal film by the PE-PVD method, a Cu film is formed as a seed metal film on the Ti film to form a metal film MF. Next, by photolithography, a resist pattern R is formed to cover areas where the first wiring is not formed. Next, electroplating is performed using the resist pattern R as a mask to form metal plating MP1 (for example, Cu plating).
- metal plating MP1 for example, Cu plating
- first wiring made of metal plating MP1 is formed.
- the first through electrode 400a1 and/or the horizontal wiring 400b1 may be formed by, for example, a damascene method.
- a protective film 550 as a first insulating film is formed and planarized (see FIG. 24B).
- the insulating film 300 is formed by a PE-CVD (Plasma-Enhanced Chemical Vapor Deposition) method or an ALD (Atomic Layer Deposition) method, and the insulating film 300 is ground and polished by a grinder, a CMP apparatus, or the like. to flatten it.
- the protective film 550 as the first insulating film and the support substrate 560 are bonded (see FIG. 24C).
- the supporting substrate 560 which is a semiconductor substrate having a slight oxide film formed on its surface, and the protective film 550 are directly bonded.
- the support substrate 560 is bonded together in a wafer state. At this time, the thickness of the first semiconductor substrate 100a of the first element chip 100 can be reduced by grinding and polishing, if necessary.
- the second through holes TH2 are formed in the support substrate 560 (see FIG. 25A). Specifically, the second through holes TH2 are formed in the support substrate 560 by lithography and plasma etching.
- a second insulating film 570 is formed (see FIG. 25B). Specifically, the second insulating film 570 is formed by PE-CVD or ALD.
- a first contact hole is formed. Specifically, by dry etching, the second insulating film 570 and the protective film 550 at the bottom of the second through hole TH2 are opened to form the first contact hole. As a result, the first wiring (metal plating MP1) is exposed through the first contact hole.
- a second wiring is formed (see FIG. 25C). Specifically, by a so-called semi-additive method, the second through-electrode 400c1 is provided in the first contact hole and the second through-hole TH2, and the peripheral portion of the second through-hole TH2 on the back surface of the support substrate 560 is formed. A metal plating MP2 is formed on the substrate to form a second wiring having a back surface wiring.
- a protective film 600 is formed (see FIG. 26A). Specifically, for example, a photosensitive resin material is deposited as the protective film 600 .
- a second contact hole CH2 is formed (see FIG. 26B). Specifically, by photolithography and dry etching, the protective film 600 is opened to form the second contact hole CH2. As a result, a part (rear surface wiring) of the second wiring (metal plating MP2) is exposed through the second contact hole CH2.
- the external connection terminals 700 are formed (see FIG. 26C). Specifically, an external connection terminal 700 (for example, a solder ball) is formed in the second contact hole CH2 by ball mounting so as to be connected to a portion (rear surface wiring) of the second C wiring (metal plating MP2).
- an external connection terminal 700 for example, a solder ball
- the semiconductor device 70 for example, even when both the first and second element chips 100 and 200 are thin, the external connection wiring and the external connection terminals 700 can be highly integrated while ensuring the mechanical strength of the support substrate 560. can be placed in Also, during manufacturing, the support substrate 560 can prevent a decrease in yield and a decrease in process accuracy due to warping or the like.
- the method for manufacturing the semiconductor device 70 includes a first wiring layer 100b of a first laminate in which a first semiconductor substrate 100a and a first wiring layer 100b are laminated, and a second semiconductor substrate 200a and a second wiring layer 200b in which a first wiring layer 100b is laminated. a step of joining the second wiring layer 200b of the second laminate, which is smaller than the first laminate, face-to-face; Then, the buried film 500 is planarized, and the buried film 500 and the first wiring layer 100b around the second stacked body are etched to connect one end to the internal wiring 100b2 (intralayer wiring) of the first wiring layer 100b.
- FIG. 27 is a cross-sectional view of a semiconductor device 80 according to Example 8 of one embodiment of the present technology.
- a support substrate 560 is a semiconductor substrate, and a wiring layer is disposed between an insulating layer including a buried film 500 and a protective film 550 and the support substrate 560. It has the same configuration as the semiconductor device 70 according to the seventh embodiment except that it has 555 .
- a semiconductor substrate as the support substrate 560 is provided with elements including, for example, an analog circuit, a logic circuit, a memory circuit, an AI circuit, an interface circuit, and the like.
- the wiring layer 555 has an insulating film and internal wiring provided in the insulating film. The internal wiring is electrically connected to elements provided on the support substrate 560 .
- the second through electrode 400 c 1 penetrates the support substrate 560 in the stacking direction, has one end connected to the horizontal wiring 400 b 1 , and has the other end connected to the external connection terminal 700 .
- the second through electrode 400 d 1 penetrates the support substrate 560 in the stacking direction, has one end connected to the internal wiring of the wiring layer 555 , and has the other end connected to the external connection terminal 700 .
- the entire device can be further integrated.
- the method of manufacturing the semiconductor device 80 includes a step of forming a wiring layer 555 on the protective film 550 between the step of covering with the protective film 550 and the step of arranging the support substrate 560. 70 manufacturing method.
- FIG. 28 is a cross-sectional view of a semiconductor device 90 according to Example 9 of one embodiment of the present technology.
- each pixel in the pixel region of the pixel chip as the first element chip 100 has a color filter 910 and a microlens 920 (on-chip lens). It has substantially the same configuration as the semiconductor device 70 according to the seventh embodiment except for the points.
- an antireflection film may be provided in the pixel area.
- the first semiconductor device 100a is thinned to about 3 to 30 ⁇ m.
- the semiconductor device 60 further includes a transparent substrate 940 bonded to the surface of the pixel chip 100 on the side of the plurality of microlenses 920 via an adhesive layer 930 .
- the adhesive layer 930 is not limited to the entire surface, and may be provided, for example, only in the peripheral area of the pixel area.
- a first element chip 100 and a plurality of second element chips 200 are prepared (see FIGS. 4A and 4B).
- the first element chip 100 is produced by forming elements on a first semiconductor substrate 100a by photolithography and forming a first wiring layer 100b on the first semiconductor substrate 100a.
- a plurality of second element chips 200 are formed by photolithography to form elements for each chip on a wafer that will be the second semiconductor substrate 200a, and after forming a wiring film that will be the second wiring layer 200b on the wafer, by dicing. It is generated by separating each chip.
- the first element chip 100 and the plurality of second element chips 200 are bonded (see FIG. 23A). Specifically, the first wiring layer 100b of the first element chip 100 and the second wiring layer 200b of the second element chip 200 are directly bonded by, for example, metal bonding so as to face each other.
- a buried film 500 is formed and planarized (see FIG. 23B). Specifically, after the buried film 500 is formed by the PE-CVD method, the buried film 500 is ground and polished by a grinder, a CMP apparatus, or the like to be planarized.
- the first through holes TH1 are formed (see FIG. 23C). Specifically, by photolithography and plasma etching, the buried film 500 and the insulating film 100b1 of the first wiring layer 100b are opened to form the first through holes TH1. As a result, the internal wiring 100b2 of the first wiring layer 100b is exposed through the first through hole TH1.
- the first wiring is formed (see FIG. 24A). Specifically, the first wiring composed of the first through electrode 400a1 and the horizontal wiring 400b1 is formed by a so-called semi-additive method.
- a Ti film as a barrier metal film by the PE-PVD method, a Cu film is formed as a seed metal film on the Ti film to form a metal film MF.
- a resist pattern R is formed to cover areas where the first wiring is not formed.
- electroplating is performed using the resist pattern R as a mask to form metal plating MP1 (for example, Cu plating).
- the resist is removed, and wet etching is performed to remove the metal film MF covering the portion where the first wiring is not formed. As a result, a first wiring made of metal plating MP1 is formed.
- a protective film 550 as a first insulating film is formed and planarized (see FIG. 24B).
- the insulating film 300 is formed by a PE-CVD (Plasma-Enhanced Chemical Vapor Deposition) method or an ALD (Atomic Layer Deposition) method, and the insulating film 300 is ground and polished by a grinder, a CMP apparatus, or the like. to flatten it.
- the protective film 550 as the first insulating film and the support substrate 560 are bonded (see FIG. 31A).
- the supporting substrate 560 which is a semiconductor substrate having a slight oxide film formed on its surface, and the protective film 550 are directly bonded.
- the support substrate 560 is bonded together in a wafer state.
- the thickness of the first element chip 100 is reduced (see FIG. 31B). Specifically, the back surface (upper surface) of the first semiconductor substrate 100a of the first element chip 100 is ground and polished by, for example, a grinder, a CMP apparatus, or the like to reduce the thickness of the first element chip 100 to 10 ⁇ m.
- the transparent substrate 940 is bonded with an adhesive 930 (see FIG. 32A).
- the support substrate 560 is thinned (see FIG. 32B). Specifically, the support substrate 560 is thinned to a thickness of about 100 ⁇ m by, for example, a grinder, a CMP apparatus, or the like.
- the second through holes TH2 are formed in the support substrate 560 (see FIG. 33A). Specifically, the second through holes TH2 are formed in the support substrate 560 by lithography and plasma etching.
- an insulating film 570 is formed as a second insulating film (see FIG. 33B). Specifically, the insulating film 570 is formed by PE-CVD or ALD.
- a first contact hole is formed. Specifically, by dry etching, the insulating film 570 and the protective film 550 at the bottom of the second through hole TH2 are opened to form the first contact hole. As a result, part of the first wiring (metal plating MP1) is exposed through the first contact hole.
- a second wiring is formed (see FIG. 34A). Specifically, by a so-called semi-additive method, the second through-electrode 400c1 is provided in the first contact hole and the second through-hole TH2, and the peripheral portion of the second through-hole TH2 on the back surface of the support substrate 560 is formed. A metal plating MP2 is formed as a second wiring having a back wiring.
- a protective film 600 is formed (see FIG. 34B). Specifically, for example, a photosensitive resin material is deposited as the protective film 600 .
- a second contact hole CH2 is formed (see FIG. 35A). Specifically, by photolithography and dry etching, the protective film 600 is opened to form the second contact hole CH2. As a result, a part (rear surface wiring) of the second wiring (metal plating MP2) is exposed through the second contact hole CH2.
- the external connection terminals 700 are formed (see FIG. 35B). Specifically, an external connection terminal 700 (for example, a solder ball) is formed in the second contact hole CH2 by ball mounting so as to be connected to a portion (rear surface wiring) of the second C wiring (metal plating MP2).
- an external connection terminal 700 for example, a solder ball
- the semiconductor device 90 bonding between chips and formation of wiring, embedded films and protective films can be performed before forming color filters and on-chip lenses, which are restricted in process temperature, so that higher quality and reliability can be achieved.
- a semiconductor device with high performance can be realized.
- the thickness of the first element chip 100 needs to be, for example, 30 ⁇ m or less. Therefore, the layout of the external connection wiring of this technology is very effective.
- the semiconductor device 90 has the support substrate 560 and the second element chip 200 can be made thin, it is possible to form the small-diameter via 400a1 relatively easily.
- the support substrate 560 may have a semiconductor substrate and/or a wiring layer.
- the elements may be provided on the semiconductor substrate.
- An element that does not require high integration is suitable for this element.
- FIG. 36 is a cross-sectional view of a semiconductor device 110 according to Example 10 of one embodiment of the present technology.
- the semiconductor device 110 according to the tenth embodiment, as shown in FIG. 36 includes a support substrate 560 bonded to the second element chip 200 via a buried film 500 as an insulating layer.
- the external connection terminal 700 is provided on the opposite side of the support substrate 560 from the embedded film 500 side.
- the wiring 400 ⁇ /b>H has a through-electrode penetrating through the embedded film 500 and the support substrate 560 .
- the embedded film 500 is planarized and bonded to the support substrate 560 .
- the support substrate 560 has approximately the same size as the first element chip 100, for example.
- the embedded film 500 is provided on the side surface side of the second element chip 200 and on the side of the second element chip 200 opposite to the first element chip 100 side.
- An insulating film 570 is provided between the embedded film 500 and the support substrate 560 and the wiring 400H, and on the surface of the support substrate 560 opposite to the first element chip 100 side.
- the insulating film 570 is covered with the protective film 600 .
- the through electrode of the wiring 400H penetrates the embedded film 500 and the support substrate 560 on the side surface side of the second element chip 200 in the stacking direction, one end is connected to the internal wiring 100b2 of the first wiring layer 100b, and the other end is connected to the internal wiring 100b2 of the first wiring layer 100b. It is located near the protective film 600 .
- the wiring 400 ⁇ /b>H further has a back surface wiring connected to the other end of the through electrode near the protective film 600 . This rear wiring is connected to the external connection terminal 700 within the protective film 600 .
- an etching stop layer 950 is provided at least in a portion of the first wiring layer 100b that is not joined to the second wiring layer 200b.
- the etch stop layer 950 is provided along the first and second element chips 100, 200 as an example.
- the etching stop layer 950 an inorganic film such as SiO 2 , SiON, SiN, SiOC, SiCN, or an organic film made of a resin having a skeleton such as silicone, polyimide, acrylic, or epoxy is used.
- the etching stop layer 950 is preferably made of a material that provides a dry etching selectivity with respect to the buried film 500.
- the etching stop layer is preferably made of SiN.
- a first element chip 100 and a plurality of second element chips 200 are prepared (see FIGS. 4A and 4B).
- the first element chip 100 is produced by forming elements on a first semiconductor substrate 100a by photolithography and forming a first wiring layer 100b on the first semiconductor substrate 100a.
- a plurality of second element chips 200 are formed by photolithography to form elements for each chip on a wafer that will be the second semiconductor substrate 200a, and after forming a wiring film that will be the second wiring layer 200b on the wafer, by dicing. It is generated by separating each chip.
- the first element chip 100 and the plurality of second element chips 200 are bonded (see FIG. 23A). Specifically, the first wiring layer 100b of the first element chip 100 and the second wiring layer 200b of the second element chip 200 are directly bonded by, for example, metal bonding so as to face each other.
- an etching stop layer 950 (eg, SiN) is formed as a first insulating film (see FIG. 38A).
- a buried film 500 is formed and planarized (see FIG. 38B). Specifically, after the buried film 500 is formed by the PE-CVD method, the buried film 500 is ground and polished by a grinder, a CMP apparatus, or the like to be planarized.
- the embedded film 500 and the support substrate 560 are bonded (see FIG. 38C).
- the support substrate 560 which is a semiconductor substrate having a slight oxide film formed on the surface, and the embedded film 500 are directly bonded.
- the support substrate 560 is bonded together in a wafer state. At this time, the thickness of the first semiconductor substrate 100a of the first element chip 100 can be reduced by grinding and polishing, if necessary.
- through holes TH are formed in the support substrate 560 and the embedded film 500 (see FIG. 38D). Specifically, through holes TH are formed in the support substrate 560 by lithography and plasma etching. At this time, etching can be stopped by the etching stop layer 950 .
- an insulating film 570 is formed as a second insulating film (see FIG. 39A). Specifically, an insulating film 570 is formed on the entire surface by PE-CVD or ALD.
- a first contact hole CH1 is formed (see FIG. 39B). Specifically, the insulating film 570, the etching stop layer 950, and the insulating film 100b1 of the first wiring layer 100b are opened by plasma etching to form the first contact hole CH1. As a result, the internal wiring 100b2 of the first wiring layer 100b is exposed through the through hole TH and the first contact hole CH1.
- wiring 400H is formed (see FIG. 39C). Specifically, the wiring 400H composed of the through electrode and the back wiring is formed by a so-called semi-additive method.
- a Cu film is formed as a seed metal film on the Ti film to form a metal film MF.
- a resist pattern R is formed by photolithography to cover portions where the wiring 400H is not formed.
- electroplating is performed using the resist pattern R as a mask to form metal plating MP (for example, Cu plating).
- the resist is removed, and the metal film MF covering the portion where the wiring 400H is not formed is removed by wet etching. As a result, wiring 400H made of metal plating MP is formed.
- a protective film 600 is formed (see FIG. 40A). Specifically, for example, a photosensitive resin material is deposited as the protective film 600 .
- a second contact hole CH2 is formed (see FIG. 40B). Specifically, by photolithography and dry etching, the protective film 600 is opened to form the second contact hole CH2. As a result, a part (rear surface wiring) of the wiring 400H (metal plating MP) is exposed through the second contact hole CH2.
- the external connection terminals 700 are formed (see FIG. 40C). Specifically, an external connection terminal 700 (for example, a solder ball) is formed in the second contact hole CH2 by ball mounting so as to be connected to a part (rear surface wiring) of the wiring 400H (metal plating MP).
- an external connection terminal 700 for example, a solder ball
- the semiconductor device 110 it is possible to provide the semiconductor device 110 that can be highly integrated with a relatively simple configuration.
- the method for manufacturing the semiconductor device 110 includes a first wiring layer 100b of a first laminate in which a first semiconductor substrate 100a and a first wiring layer 100b are laminated, and a second semiconductor substrate 200a and a second wiring layer 200b in which a first wiring layer 100b is laminated. a step of joining the second wiring layer 200b of the second laminate, which is smaller than the first laminate, face-to-face; and forming an etching stop layer 950 from the opposite side of the second laminate to the first laminate.
- FIG. 41 is a cross-sectional view of a semiconductor device 111 according to Example 11 of an embodiment of the present technology.
- each pixel in the pixel region of the pixel chip as the first element chip 100 has a color filter 910 and a microlens 920 (on-chip lens). It has substantially the same configuration as the semiconductor device 10 according to the tenth embodiment, except for one point.
- An antireflection film may be provided in the pixel area.
- the first semiconductor device 100a is thinned to about 3 to 30 ⁇ m.
- the semiconductor device 111 further includes a transparent substrate 940 bonded to the surface of the pixel chip 100 on the side of the plurality of microlenses 920 via an adhesive layer 930 .
- the adhesive layer 930 is not limited to the entire surface, and may be provided, for example, only in the peripheral area of the pixel area.
- a first element chip 100 and a plurality of second element chips 200 are prepared (see FIGS. 4A and 4B).
- the first element chip 100 is produced by forming elements on a first semiconductor substrate 100a by photolithography and forming a first wiring layer 100b on the first semiconductor substrate 100a.
- a plurality of second element chips 200 are formed by photolithography to form elements for each chip on a wafer that will be the second semiconductor substrate 200a, and after forming a wiring film that will be the second wiring layer 200b on the wafer, by dicing. It is generated by separating each chip.
- the first element chip 100 and the plurality of second element chips 200 are bonded (see FIG. 23A). Specifically, the first wiring layer 100b of the first element chip 100 and the second wiring layer 200b of the second element chip 200 are directly bonded by, for example, metal bonding so as to face each other.
- an etching stop layer 950 (eg, SiN) is formed as a first insulating film (see FIG. 38A).
- a buried film 500 is formed and planarized (see FIG. 38B). Specifically, after the buried film 500 is formed by the PE-CVD method, the buried film 500 is ground and polished by a grinder, a CMP apparatus, or the like to be planarized.
- the embedded film 500 and the support substrate 560 are bonded (see FIG. 38C).
- the supporting substrate 560 which is a semiconductor substrate having a slight oxide film formed on its surface, and the protective film 550 are directly bonded.
- the support substrate 560 is bonded together in a wafer state.
- the thickness of the first element chip 100 is reduced (see FIG. 44A). Specifically, the back surface (upper surface) of the first semiconductor substrate 100a of the first element chip 100 is ground and polished by, for example, a grinder, a CMP apparatus, or the like to reduce the thickness of the first element chip 100 to 10 ⁇ m.
- an antireflection film, color filters 910 and microlenses 920 are formed (see FIG. 44B).
- the transparent substrate 940 is bonded with an adhesive 930 (see FIG. 45A).
- the support substrate 560 is thinned. Specifically, the support substrate 560 is thinned to a thickness of about 100 ⁇ m by, for example, a grinder, a CMP apparatus, or the like.
- through holes TH are formed in the support substrate 560 and the embedded film 500 (see FIG. 45B). Specifically, through holes TH are formed in the support substrate 560 by lithography and plasma etching. At this time, etching can be stopped by the etching stop layer 950 .
- an insulating film 570 is formed as a second insulating film (see FIG. 46A). Specifically, an insulating film 570 is formed on the entire surface by PE-CVD or ALD.
- a first contact hole CH1 is formed (see FIG. 46B). Specifically, the insulating film 570, the etching stop layer 950, and the insulating film 100b1 of the first wiring layer 100b are opened by plasma etching to form the first contact hole CH1. As a result, the internal wiring 100b2 of the first wiring layer 100b is exposed through the through hole TH and the first contact hole CH1.
- wiring 400H is formed (see FIG. 47A). Specifically, the wiring 400H composed of the through electrode and the back wiring is formed by a so-called semi-additive method.
- a Cu film is formed as a seed metal film on the Ti film to form a metal film MF.
- a resist pattern R is formed by photolithography to cover portions where the wiring 400H is not formed.
- electroplating is performed using the resist pattern R as a mask to form metal plating MP (for example, Cu plating).
- the resist is removed, and the metal film MF covering the portion where the wiring 400H is not formed is removed by wet etching. As a result, wiring 400H made of metal plating MP is formed.
- a protective film 600 is formed (see FIG. 47B). Specifically, for example, a photosensitive resin material is deposited as the protective film 600 .
- a second contact hole CH2 is formed (see FIG. 48A). Specifically, by photolithography and dry etching, the protective film 600 is opened to form the second contact hole CH2. As a result, a part (rear surface wiring) of the wiring 400H (metal plating MP) is exposed through the second contact hole CH2.
- the external connection terminals 700 are formed (see FIG. 48B). Specifically, an external connection terminal 700 (for example, a solder ball) is formed in the second contact hole CH2 by ball mounting so as to be connected to a part (rear surface wiring) of the wiring 400H (metal plating MP).
- an external connection terminal 700 for example, a solder ball
- the semiconductor device 111 bonding between chips and formation of insulating films, wirings, and buried films can be performed before forming color filters and on-chip lenses, which are subject to process temperature restrictions. A semiconductor device with high performance can be realized.
- the first element chip 100 is a pixel chip, the thickness of the first element chip 100 must be 30 ⁇ m or less. Therefore, the layout of the external connection wiring of this technology is very effective.
- the configurations of the semiconductor devices of the above embodiments may be combined with each other within a technically consistent range.
- a wiring including a wiring part arranged along at least one chip including a second element chip and a through-electrode penetrating a supporting substrate arranged on the opposite side of the chip to the first element chip. may be provided.
- At least one chip including the second element chip may be a single second element chip.
- At least one first element chip may be a plurality of first element chips.
- the semiconductor devices according to Examples 6, 9, and 11 need not have at least one of the antireflection film, the color filter, and the microlens (on-chip lens).
- the color filters may not be provided.
- at least one of the color filter and the microlens may not be provided.
- the semiconductor device according to the present technology constitutes a solid-state imaging device
- the semiconductor device according to the present technology constitutes a part (for example, a processing unit) of the solid-state imaging device.
- any one of a memory chip, a logic chip, an analog chip, an interface chip, and an AI chip may be used as the first element chip and the second element chip.
- FIG. 49 is a diagram illustrating a usage example in which a semiconductor device according to the present technology (for example, a semiconductor device according to each embodiment) constitutes a solid-state imaging device (image sensor).
- each of the above-described embodiments can be used in various cases of sensing light such as visible light, infrared light, ultraviolet light, and X-rays, for example, as follows. That is, as shown in FIG. 49, for example, the field of appreciation for photographing images to be used for viewing, the field of transportation, the field of home appliances, the field of medicine/healthcare, the field of security, the field of beauty, the field of sports, etc. field, agricultural field, etc.
- the semiconductor device according to the present technology is used in devices for capturing images for viewing, such as digital cameras, smartphones, and mobile phones with camera functions. can be used.
- in-vehicle sensors that capture images of the front, back, surroundings, and interior of a vehicle, and monitor running vehicles and roads for safe driving such as automatic stopping and recognition of the driver's condition.
- a semiconductor device can be used for devices used for transportation, such as a monitoring camera that monitors traffic, a ranging sensor that measures distance between vehicles, and the like.
- a device used for home appliances such as a television receiver, a refrigerator, and an air conditioner.
- a semiconductor device can be used.
- the semiconductor device according to the present technology is used in medical and healthcare equipment such as endoscopes and angiographic imaging equipment that receives infrared light. can be used.
- the semiconductor device according to the present technology can be used in devices used for security, such as surveillance cameras for crime prevention and cameras for person authentication.
- the semiconductor device according to the present technology can be used in devices used for beauty, such as a skin measuring device that photographs the skin and a microscope that photographs the scalp.
- the semiconductor device according to the present technology can be used in devices used for sports, such as action cameras and wearable cameras for sports.
- the semiconductor device according to the present technology can be used in equipment used for agriculture, such as cameras for monitoring the condition of fields and crops.
- the semiconductor device according to each embodiment described above can be used as the solid-state imaging device 501 of any type having an imaging function, such as a camera system such as a digital still camera or a video camera, or a mobile phone having an imaging function.
- FIG. 50 shows a schematic configuration of an electronic device 510 (camera) as an example.
- This electronic device 510 is, for example, a video camera capable of capturing still images or moving images, and drives a solid-state imaging device 501, an optical system (optical lens) 502, a shutter device 503, and the solid-state imaging device 501 and the shutter device 503. and a signal processing unit 505 .
- the optical system 502 guides image light (incident light) from a subject to the pixel area of the solid-state imaging device 501 .
- This optical system 502 may be composed of a plurality of optical lenses.
- a shutter device 503 controls a light irradiation period and a light shielding period for the solid-state imaging device 501 .
- the drive unit 504 controls the transfer operation of the solid-state imaging device 501 and the shutter operation of the shutter device 503 .
- a signal processing unit 505 performs various kinds of signal processing on the signal output from the solid-state imaging device 501 .
- the video signal Dout after signal processing is stored in a storage medium such as a memory, or output to a monitor or the like.
- a semiconductor device according to the present technology can also be applied to other electronic devices that detect light, such as a TOF (Time Of Flight) sensor.
- a TOF sensor When applied to a TOF sensor, for example, it can be applied to a range image sensor based on the direct TOF measurement method and a range image sensor based on the indirect TOF measurement method.
- a range image sensor based on the direct TOF measurement method the arrival timing of photons in each pixel is obtained directly in the time domain. Therefore, an optical pulse with a short pulse width is transmitted, and an electrical pulse is generated by a receiver that responds at high speed.
- the present disclosure can be applied to the receiver in that case.
- the time of flight of light is measured using a semiconductor element structure in which the amount of detection and accumulation of carriers generated by light changes depending on the arrival timing of light.
- the present disclosure can also be applied as such a semiconductor structure.
- it is optional to provide a color filter array and a microlens array as shown in FIG.
- the technology (the present technology) according to the present disclosure can be applied to various products.
- the technology according to the present disclosure can be realized as a device mounted on any type of moving body such as automobiles, electric vehicles, hybrid electric vehicles, motorcycles, bicycles, personal mobility, airplanes, drones, ships, and robots. may
- FIG. 51 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 technology according to the present disclosure can be applied.
- a vehicle control system 12000 includes a plurality of electronic control units connected via a communication network 12001.
- vehicle control system 12000 includes drive system control unit 12010 , body system control unit 12020 , vehicle exterior information detection unit 12030 , vehicle interior information detection unit 12040 , and integrated control unit 12050 .
- integrated control unit 12050 As the functional configuration of the integrated control unit 12050, a microcomputer 12051, an audio/image output unit 12052, and an in-vehicle network I/F (interface) 12053 are illustrated.
- the drive system control unit 12010 controls the operation of devices related to the drive system of the vehicle according to various programs.
- the driving system control unit 12010 includes a driving force generator for generating driving force of the 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 to adjust and a brake device to generate braking force of the vehicle.
- the body system control unit 12020 controls the operation of various devices equipped 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, winkers or fog lamps.
- the body system control unit 12020 can receive radio waves transmitted from a portable device that substitutes for a key or signals from various switches.
- the body system control unit 12020 receives the input of these radio waves or signals and controls the door lock device, power window device, lamps, etc. of the vehicle.
- the vehicle exterior information detection unit 12030 detects information outside the vehicle in which the vehicle control system 12000 is installed.
- the vehicle exterior information detection unit 12030 is connected with an imaging section 12031 .
- the vehicle exterior information detection unit 12030 causes the imaging unit 12031 to capture an image of the exterior of the vehicle, and receives the captured image.
- the vehicle exterior information detection unit 12030 may perform object detection processing or distance detection processing such as people, vehicles, obstacles, signs, or characters on the road surface based on the received image.
- the imaging unit 12031 is an optical sensor that receives light and outputs an electrical signal according to the amount of received light.
- the imaging unit 12031 can output the electric signal as an image, and can also output it as distance measurement information.
- the light received by the imaging unit 12031 may be visible light or non-visible light such as infrared rays.
- the in-vehicle information detection unit 12040 detects in-vehicle information.
- the in-vehicle information detection unit 12040 is connected to, for example, a driver state detection section 12041 that detects the state of the driver.
- the driver state detection unit 12041 includes, for example, a camera that captures an image of the driver, and the in-vehicle information detection unit 12040 detects 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 is dozing off.
- the microcomputer 12051 calculates control target values for 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 controls the drive system control unit.
- a control command can be output to 12010 .
- the microcomputer 12051 realizes the functions of ADAS (Advanced Driver Assistance System) including collision avoidance or shock mitigation, follow-up driving based on inter-vehicle distance, vehicle speed maintenance driving, vehicle collision warning, or vehicle lane deviation warning. Cooperative control can be performed for the purpose of ADAS (Advanced Driver Assistance System) including collision avoidance or shock mitigation, follow-up driving based on inter-vehicle distance, vehicle speed maintenance driving, vehicle collision warning, or vehicle lane deviation warning. Cooperative control can be performed for the purpose of ADAS (Advanced Driver Assistance System) including collision avoidance or shock mitigation, follow-up driving based on inter-vehicle distance, vehicle speed maintenance driving, vehicle collision warning, or vehicle
- the microcomputer 12051 controls the driving force generator, the steering mechanism, the braking device, etc. based on the information about the vehicle surroundings acquired by the vehicle exterior information detection unit 12030 or the vehicle interior information detection unit 12040, so that the driver's Cooperative control can be performed for the purpose of autonomous driving, etc., in which vehicles autonomously travel without depending on 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 information detection unit 12030 outside the vehicle.
- the microcomputer 12051 controls the headlamps according to the position of the preceding vehicle or the oncoming vehicle detected by the vehicle exterior information detection unit 12030, and performs cooperative control aimed at anti-glare such as switching from high beam to low beam. It can be carried out.
- the audio/image output unit 12052 transmits at least one of audio and/or image output signals to an output device capable of visually or audibly notifying the passengers of the vehicle or the outside of the vehicle.
- an audio speaker 12061, a display unit 12062, and an instrument panel 12063 are illustrated as output devices.
- the display unit 12062 may include at least one of an on-board display and a head-up display, for example.
- FIG. 52 is a diagram showing an example of the installation position of the imaging unit 12031.
- the vehicle 12100 has imaging units 12101, 12102, 12103, 12104, and 12105 as the imaging unit 12031.
- the imaging units 12101, 12102, 12103, 12104, and 12105 are provided at positions such as the front nose of the vehicle 12100, the side mirrors, the rear bumper, the back door, and the upper part of the windshield in the vehicle interior, for example.
- An image pickup unit 12101 provided in the front nose and an image pickup unit 12105 provided above the windshield in the passenger compartment mainly acquire images in front of the vehicle 12100 .
- Imaging units 12102 and 12103 provided in the side mirrors mainly acquire side images of the vehicle 12100 .
- An imaging unit 12104 provided in the rear bumper or back door mainly acquires an image behind the vehicle 12100 .
- Forward images acquired by the imaging units 12101 and 12105 are mainly used for detecting preceding vehicles, pedestrians, obstacles, traffic lights, traffic signs, lanes, and the like.
- FIG. 52 shows an example of the imaging range of the imaging units 12101 to 12104.
- the imaging range 12111 indicates the imaging range of the imaging unit 12101 provided in the front nose
- the imaging ranges 12112 and 12113 indicate the imaging ranges of the imaging units 12102 and 12103 provided in the side mirrors, respectively
- the imaging range 12114 The imaging range of an imaging unit 12104 provided on the rear bumper or back door is shown. For example, by superimposing the image data captured by the imaging units 12101 to 12104, a bird's-eye view image of the vehicle 12100 viewed from above can be obtained.
- At least one of the imaging units 12101 to 12104 may have a function of acquiring distance information.
- at least one of the imaging units 12101 to 12104 may be a stereo camera composed of a plurality of imaging elements, or may be an imaging element having pixels for phase difference detection.
- the microcomputer 12051 determines the distance to each three-dimensional object within the imaging ranges 12111 to 12114 and changes in this distance over time (relative velocity with respect to the vehicle 12100). , it is possible to extract, as the preceding vehicle, the closest three-dimensional object on the course of the vehicle 12100, which runs at a predetermined speed (for example, 0 km/h or more) in substantially the same direction as the vehicle 12100. can. Furthermore, the microcomputer 12051 can set the inter-vehicle distance to be secured in advance in front of the preceding vehicle, and perform automatic brake control (including following stop control) and automatic acceleration control (including following start control). In this way, cooperative control can be performed for the purpose of automatic driving in which the vehicle runs autonomously without relying on the operation of the driver.
- automatic brake control including following stop control
- automatic acceleration control including following start control
- the microcomputer 12051 converts three-dimensional object data related to three-dimensional objects to other three-dimensional objects such as motorcycles, ordinary vehicles, large vehicles, pedestrians, and utility poles. 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 those that are visible to the driver of the vehicle 12100 and those that are difficult to see. Then, the microcomputer 12051 judges the collision risk indicating the degree of danger 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, an audio speaker 12061 and a display unit 12062 are displayed. By outputting an alarm to the driver via the drive system control unit 12010 and performing forced deceleration and avoidance steering via the drive system control unit 12010, driving support for collision avoidance can be performed.
- At least one of the imaging 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 the pedestrian exists in the captured images of the imaging units 12101 to 12104 .
- recognition of a pedestrian is performed by, for example, a procedure for extracting feature points in images captured by the imaging units 12101 to 12104 as infrared cameras, and performing pattern matching processing on a series of feature points indicating the outline of an object to determine whether or not the pedestrian is a pedestrian.
- the audio image output unit 12052 outputs a rectangular outline for emphasis to the recognized pedestrian. is superimposed on the display unit 12062 . Also, the audio/image output unit 12052 may control the display unit 12062 to display an icon or the like indicating a pedestrian at a desired position.
- the technology according to the present disclosure can be applied to, for example, the imaging unit 12031 among the configurations described above.
- the solid-state imaging device 111 of the present disclosure can be applied to the imaging unit 12031 .
- Example of application to an endoscopic surgery system> This technology can be applied to various products.
- the technique (the present technique) according to the present disclosure may be applied to an endoscopic surgery system.
- FIG. 53 is a diagram showing an example of a schematic configuration of an endoscopic surgery system to which the technology according to the present disclosure (this technology) can be applied.
- FIG. 53 shows how an operator (physician) 11131 is performing surgery on a patient 11132 on a patient bed 11133 using an endoscopic surgery system 11000 .
- an endoscopic surgery system 11000 includes an endoscope 11100, other surgical instruments 11110 such as a pneumoperitoneum tube 11111 and an energy treatment instrument 11112, and a support arm device 11120 for supporting the endoscope 11100. , and a cart 11200 loaded with various devices for endoscopic surgery.
- An endoscope 11100 is composed of a lens barrel 11101 whose distal end is inserted into the body cavity of a patient 11132 and a camera head 11102 connected to the proximal end of the lens barrel 11101 .
- an endoscope 11100 configured as a so-called rigid scope having a rigid lens barrel 11101 is illustrated, but the endoscope 11100 may be configured as a so-called flexible scope having a flexible lens barrel. good.
- the tip of the lens barrel 11101 is provided with an opening into which the objective lens is fitted.
- a light source device 11203 is connected to the endoscope 11100, and light generated by the light source device 11203 is guided to the tip of the lens barrel 11101 by a light guide extending inside the lens barrel 11101, where it reaches the objective. Through the lens, the light is irradiated toward the observation object inside the body cavity of the patient 11132 .
- the endoscope 11100 may be a straight scope, a perspective scope, or a side scope.
- An optical system and an imaging element are provided inside the camera head 11102, and the reflected light (observation light) from the observation target is focused on the imaging element by the optical system.
- the imaging device photoelectrically converts the observation light to generate an electrical signal corresponding to the observation light, that is, an image signal corresponding to the observation image.
- the image signal is transmitted to a camera control unit (CCU: Camera Control Unit) 11201 as RAW data.
- CCU Camera Control Unit
- the CCU 11201 is composed of a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), etc., and controls the operations of the endoscope 11100 and the display device 11202 in an integrated manner. Further, the CCU 11201 receives an image signal from the camera head 11102 and performs various image processing such as development processing (demosaicing) for displaying an image based on the image signal.
- CPU Central Processing Unit
- GPU Graphics Processing Unit
- the display device 11202 displays an image based on an image signal subjected to image processing by the CCU 11201 under the control of the CCU 11201 .
- the light source device 11203 is composed of a light source such as an LED (Light Emitting Diode), for example, and supplies the endoscope 11100 with irradiation light for photographing a surgical site or the like.
- a light source such as an LED (Light Emitting Diode), for example, and supplies the endoscope 11100 with irradiation light for photographing a surgical site or the like.
- the input device 11204 is an input interface for the endoscopic surgery system 11000.
- the user can input various information and instructions to the endoscopic surgery system 11000 via the input device 11204 .
- the user inputs an instruction or the like to change the imaging conditions (type of irradiation light, magnification, focal length, etc.) by the endoscope 11100 .
- the treatment instrument control device 11205 controls driving of the energy treatment instrument 11112 for tissue cauterization, incision, blood vessel sealing, or the like.
- the pneumoperitoneum device 11206 inflates the body cavity of the patient 11132 for the purpose of securing the visual field of the endoscope 11100 and securing the operator's working space, and injects gas into the body cavity through the pneumoperitoneum tube 11111. send in.
- the recorder 11207 is a device capable of recording various types of information regarding surgery.
- the printer 11208 is a device capable of printing various types of information regarding surgery in various formats such as text, images, and graphs.
- the light source device 11203 that supplies the endoscope 11100 with irradiation light for photographing the surgical site can be composed of, for example, a white light source composed of an LED, a laser light source, or a combination thereof.
- a white light source is configured by a combination of RGB laser light sources
- the output intensity and output timing of each color (each wavelength) can be controlled with high accuracy. It can be carried out.
- the observation target is irradiated with laser light from each of the RGB laser light sources in a time-division manner, and by controlling the drive of the imaging element of the camera head 11102 in synchronization with the irradiation timing, each of RGB can be handled. It is also possible to pick up images by time division. According to this method, a color image can be obtained without providing a color filter in the imaging element.
- the driving of the light source device 11203 may be controlled so as to change the intensity of the output light every predetermined time.
- the drive of the imaging device of the camera head 11102 in synchronism with the timing of the change in the intensity of the light to obtain an image in a time-division manner and synthesizing the images, a high dynamic A range of images can be generated.
- the light source device 11203 may be configured to be able to supply light in a predetermined wavelength band corresponding to special light observation.
- special light observation for example, the wavelength dependence of light absorption in body tissues is used to irradiate a narrower band of light than the irradiation light (i.e., white light) used during normal observation, thereby observing the mucosal surface layer.
- narrow band imaging in which a predetermined tissue such as a blood vessel is imaged with high contrast, is performed.
- fluorescence observation may be performed in which an image is obtained from fluorescence generated by irradiation with excitation light.
- the body tissue is irradiated with excitation light and the fluorescence from the body tissue is observed (autofluorescence observation), or a reagent such as indocyanine green (ICG) is locally injected into the body tissue and the body tissue is A fluorescence image can be obtained by irradiating excitation light corresponding to the fluorescence wavelength of the reagent.
- the light source device 11203 can be configured to be able to supply narrowband light and/or excitation light corresponding to such special light observation.
- FIG. 54 is a block diagram showing an example of functional configurations of the camera head 11102 and CCU 11201 shown in FIG.
- the camera head 11102 has a lens unit 11401, an imaging section 11402, a drive section 11403, a communication section 11404, and a camera head control section 11405.
- the CCU 11201 has a communication section 11411 , an image processing section 11412 and a control section 11413 .
- the camera head 11102 and the CCU 11201 are communicably connected to each other via a transmission cable 11400 .
- a lens unit 11401 is an optical system provided at a connection with the lens barrel 11101 . Observation light captured from the tip of the lens barrel 11101 is guided to the camera head 11102 and enters the lens unit 11401 .
- a lens unit 11401 is configured by combining a plurality of lenses including a zoom lens and a focus lens.
- the imaging unit 11402 is composed of an imaging element.
- the imaging device constituting the imaging unit 11402 may be one (so-called single-plate type) or plural (so-called multi-plate type).
- image signals corresponding to RGB may be generated by each image pickup element, and a color image may be obtained by synthesizing the image signals.
- the imaging unit 11402 may be configured to have a pair of imaging elements for respectively acquiring right-eye and left-eye image signals corresponding to 3D (Dimensional) display.
- the 3D display enables the operator 11131 to more accurately grasp the depth of the living tissue in the surgical site.
- a plurality of systems of lens units 11401 may be provided corresponding to each imaging element.
- the imaging unit 11402 does not necessarily have to be provided in the camera head 11102 .
- the imaging unit 11402 may be provided inside the lens barrel 11101 immediately after the objective lens.
- the drive unit 11403 is configured by an actuator, and moves the zoom lens and focus lens of the lens unit 11401 by a predetermined distance along the optical axis under control from the camera head control unit 11405 . Thereby, the magnification and focus of the image captured by the imaging unit 11402 can be appropriately adjusted.
- the communication unit 11404 is composed of a communication device for transmitting and receiving various information to and from the CCU 11201.
- the communication unit 11404 transmits the image signal obtained from the imaging unit 11402 as RAW data to the CCU 11201 via the transmission cable 11400 .
- the communication unit 11404 receives a control signal for controlling driving of the camera head 11102 from the CCU 11201 and supplies it to the camera head control unit 11405 .
- the control signal includes, for example, information to specify the frame rate of the captured image, information to specify the exposure value at the time of imaging, and/or information to specify the magnification and focus of the captured image. Contains information about conditions.
- the imaging conditions such as the frame rate, exposure value, magnification, and focus may be appropriately designated by the user, or may be automatically set by the control unit 11413 of the CCU 11201 based on the acquired image signal. good.
- the endoscope 11100 is equipped with so-called AE (Auto Exposure) function, AF (Auto Focus) function, and AWB (Auto White Balance) function.
- the camera head control unit 11405 controls driving of the camera head 11102 based on the control signal from the CCU 11201 received via the communication unit 11404.
- the communication unit 11411 is composed of a communication device for transmitting and receiving various information to and from the camera head 11102 .
- the communication unit 11411 receives image signals transmitted from the camera head 11102 via the transmission cable 11400 .
- the communication unit 11411 transmits a control signal for controlling driving of the camera head 11102 to the camera head 11102 .
- Image signals and control signals can be transmitted by electric communication, optical communication, or the like.
- the image processing unit 11412 performs various types of image processing on the image signal, which is RAW data transmitted from the camera head 11102 .
- the control unit 11413 performs various controls related to imaging of the surgical site and the like by the endoscope 11100 and display of the captured image obtained by imaging the surgical site and the like. For example, the control unit 11413 generates control signals for controlling driving of the camera head 11102 .
- control unit 11413 causes the display device 11202 to display a captured image showing the surgical site and the like based on the image signal that has undergone image processing by the image processing unit 11412 .
- the control unit 11413 may recognize various objects in the captured image using various image recognition techniques. For example, the control unit 11413 detects the shape, color, and the like of the edges of objects included in the captured image, thereby detecting surgical instruments such as forceps, specific body parts, bleeding, mist during use of the energy treatment instrument 11112, and the like. can recognize.
- the control unit 11413 may use the recognition result to display various types of surgical assistance information superimposed on the image of the surgical site. By superimposing and presenting the surgery support information to the operator 11131, the burden on the operator 11131 can be reduced and the operator 11131 can proceed with the surgery reliably.
- a transmission cable 11400 connecting the camera head 11102 and the CCU 11201 is an electrical signal cable compatible with electrical signal communication, an optical fiber compatible with optical communication, or a composite cable of these.
- wired communication is performed using the transmission cable 11400, but communication between the camera head 11102 and the CCU 11201 may be performed wirelessly.
- the technology according to the present disclosure can be applied to the endoscope 11100, the camera head 11102 (the imaging unit 11402 thereof), and the like among the configurations described above.
- the solid-state imaging device 111 of the present disclosure can be applied to the imaging unit 10402 .
- the technology according to the present disclosure may also be applied to, for example, a microsurgery system.
- this technique can also take the following structures.
- the first element chip has a laminated structure in which a first semiconductor substrate and a first wiring layer are laminated
- the second element chip has a laminated structure in which a second semiconductor substrate and a second wiring layer are laminated; the first wiring layer and the second wiring layer are joined to face each other; an external connection terminal disposed at a position further from the first element chip than a back surface of the chip, which is a surface opposite to the first element chip side, in the stacking direction; a wiring provided at least partially around the chip and electrically connecting the first wiring layer and the external connection terminal;
- a semiconductor device further comprising: (2) The semiconductor device according to (1), wherein the wiring has at least one vertical wiring extending in the stacking direction.
- the semiconductor device according to (2) wherein the wiring has at least one horizontal wiring extending in an in-plane direction and connected to the vertical wiring.
- the at least one vertical wiring includes at least one first vertical wiring extending from the horizontal wiring toward the first semiconductor substrate and extending from the horizontal wiring toward the side opposite to the first semiconductor substrate.
- the semiconductor device according to (3) further comprising: at least one second vertical wire present.
- the wiring has one end electrically connected to the first wiring layer, and the other end connected to the external connection terminal at a position farther from the first element chip than the back surface in the stacking direction.
- the semiconductor device according to any one of (1) to (5), which is connected.
- the semiconductor device according to any one of (1) to (6), further comprising an embedded film provided on at least one of the side surface side and the back surface side of the chip.
- the semiconductor device wherein the embedded film is planarized.
- the embedded film is provided on a surface of the chip opposite to the first element chip so as to cover a part of the external connection terminal. semiconductor equipment.
- the semiconductor device according to (5) wherein the insulating film is provided only on the side surface side and further includes a protective film provided on a surface of the chip opposite to the first element chip side.
- the semiconductor device according to (16) further comprising another protective film that covers part of the protective film and the external connection terminal and exposes the other part of the external connection terminal.
- the first element chip is a pixel chip having a pixel region provided on the first semiconductor substrate.
- the first element chip has a transparent substrate bonded to the first semiconductor substrate via an adhesive layer.
- the insulating layer is provided on a side surface side of the chip and on a side opposite to the first element chip side of the chip, and the wiring is a first through hole penetrating the insulating layer on the side surface side of the chip.
- (20) or (21), comprising an electrode, a second through-electrode penetrating through the supporting substrate, and a lateral wiring arranged in the insulating layer and electrically connected to the first and second through-electrodes; ).
- the support substrate is a semiconductor substrate.
- the semiconductor substrate is provided with an element.
- the insulating layer is provided on a side surface side of the chip and on a side opposite to the first element chip side of the chip, and the through electrode extends between the insulating layer on the side surface side of the chip and the support substrate.
- a method of manufacturing a semiconductor device comprising: (31) forming a buried film from a side of the second laminate opposite to the first laminate; The method of manufacturing a semiconductor device according to (30), further comprising the step of polishing and planarizing at least the buried film.
- the at least one second laminate is a plurality of second laminates having different thicknesses;
- the first stacked body becomes a pixel chip, and after the step of bonding the support substrate, an antireflection film, a color filter, and an on-chip layer are formed on the side of the first semiconductor substrate opposite to the first wiring layer side of the first semiconductor substrate.
- the method of manufacturing a semiconductor device further comprising the step of forming at least one lens.
- a step of joining the second wiring layer of the small second laminate face-to-face Compared to the first laminate, in which the first wiring layer of the first laminate in which the first semiconductor substrate and the first wiring layer are laminated, and the second semiconductor substrate and the second wiring layer are laminated, a step of joining the second wiring layer of the small second laminate face-to-face; forming a buried film from the opposite side of the second laminate to the first laminate; planarizing the buried film; etching the embedded film and the first wiring layer around the second laminate to form a via one end of which is connected to an in-layer wiring of the first wiring layer; forming a horizontal wiring electrically connected to the other end of the via on the surface of the buried film opposite to the second stacked body side; a step of covering the horizontal wiring with a protective film; disposing a support substrate on the opposite side of the protective film to the first laminate; a step of forming a through-electrode
- the first stacked body becomes a pixel chip, and after the step of bonding the support substrate, an antireflection film, a color filter, and an on-chip layer are formed on the side of the first semiconductor substrate opposite to the first wiring layer side of the first semiconductor substrate.
- a method of manufacturing a semiconductor device comprising: (39) The first stacked body becomes a pixel chip, and after the step of bonding the supporting substrate, an antireflection film, a color filter and an on-chip are formed on the side opposite to the first wiring layer side of the first semiconductor substrate.
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Abstract
Description
前記第1素子チップと積層され、前記第1素子チップよりも小さい少なくとも1つのチップと、
を備え、
前記少なくとも1つのチップは、少なくとも1つの第2素子チップを含み、
前記第1素子チップは、第1半導体基板と第1配線層とが積層された積層構造を有し、
前記第2素子チップは、第2半導体基板と第2配線層とが積層された積層構造を有し、
前記第1配線層と前記第2配線層とが向かい合わせに接合され、
積層方向に関して、前記チップの前記第1素子チップ側とは反対側の面である裏面よりも前記第1素子チップから離れた位置に配置された外部接続端子と、
前記チップの周辺に少なくとも一部が設けられ、前記第1配線層と前記外部接続端子とを電気的に接続する配線と、
を更に備える、半導体装置を提供する。
前記配線は、積層方向に延びる少なくとも1つの縦配線を有していてもよい。
前記配線は、面内方向に延び、前記縦配線と接続された少なくとも1つの横配線を有していてもよい。
前記少なくとも1つの縦配線は、前記横配線から前記第1半導体基板側に延在する少なくとも1つの第1縦配線と、前記横配線から前記第1半導体基板側とは反対側に延在する少なくとも1つの第2縦配線と、を含んでいてもよい。
前記配線は、少なくとも前記チップの側面に絶縁膜を介して設けられていてもよい。
前記配線は、一端が前記第1配線層に電気的に接続され、且つ、他端が、積層方向に関して、前記裏面よりも前記第1素子チップから離れた位置で前記外部接続端子に接続されていてもよい。
前記半導体装置は、前記チップの側面側及び前記裏面側のうち少なくとも前記側面側に設けられた埋め込み膜を更に備えていてもよい。
前記埋め込み膜は、平坦化されていてもよい。
前記埋め込み膜は、前記裏面側に前記外部接続端子の一部を覆うように設けられていてもよい。
前記半導体装置は、前記埋め込み膜及び前記外部接続端子の一部を覆い、該外部接続端子の他部を露出させる絶縁層を更に備えていてもよい。
前記チップは、前記第1素子チップから遠ざかるほど幅が狭くなる形状を有していてもよい。
前記チップの縦断面は、前記第1素子チップから遠ざかるほど幅が狭くなる略テーパ形状であってもよい。
前記チップの角部は、丸みを帯びていてもよい。
前記少なくとも1つのチップは、少なくとも1つのダミーチップを含んでいてもよい。
前記外部接続端子は、平面視において、少なくとも一部が前記チップとは重ならなくてもよい。
前記絶縁膜は、前記側面側にのみ設けられ、前記チップの前記裏面を覆う保護膜を更に備えていてもよい。
前記半導体装置は、前記保護膜及び前記外部接続端子の一部を覆い、該外部接続端子の他部を露出させる別の保護膜を更に備えていてもよい。
前記第1素子チップは、前記第1半導体基板に画素領域が設けられた画素チップであってもよい。
前記第1素子チップは、前記第1半導体基板に接着剤層を介して透明基板が接合されていてもよい。
前記半導体装置は、前記チップに絶縁層を介して接合された支持基板を更に備え、前記外部接続端子は、前記支持基板の前記絶縁層側とは反対側に設けられ、前記配線は、前記絶縁層及び/又は前記支持基板を貫通する貫通電極を有していてもよい。
前記支持基板は、前記第1素子チップと略同一の大きさであってもよい。
前記絶縁層は、前記チップの側面側及び前記裏面側に設けられ、前記配線は、前記チップの側面側の前記絶縁層を貫通する第1貫通電極と、前記支持基板を貫通する第2貫通電極と、前記絶縁層内に配置され、前記第1及び第2貫通電極と電気的に接続する横配線と、を有していてもよい。
前記支持基板は、半導体基板であってもよい。
前記半導体基板には、素子が設けられていてもよい。
前記絶縁層は、前記チップの側面側及び前記裏面側に設けられ、前記貫通電極は、前記チップの側面側の前記絶縁層及び前記支持基板を貫通していてもよい。
少なくとも、前記第1配線層の前記第2配線層とは接合されていない部分にエッチング停止層が設けられていてもよい。
前記第1素子チップは、第1半導体基板に画素領域が設けられた画素チップであってもよい。
前記第1素子チップは、前記第1半導体基板に接着剤層を介して透明基板が接合されていてもよい。
本技術は、前記半導体装置を備える、機器も提供する。
本技術は、第1半導体基板及び第1配線層が積層された第1積層体の前記第1配線層と、前記第2半導体基板及び第2配線層が積層された、前記第1積層体よりも小さい少なくとも1つの第2積層体の前記第2配線層とを向かい合わせに接合する工程と、
前記第2積層体の前記第1積層体側とは反対側から絶縁膜を成膜する工程と、
前記第2積層体の周辺の前記絶縁膜及び前記第1配線層をエッチングして前記第1配線層の層内配線を露出させる工程と、
前記第2積層体の少なくとも側面側に前記層内配線に接続される配線を形成する工程と、
を含む、半導体装置の第1製造方法も提供する。
前記第1製造方法は、前記第2積層体の前記第1積層体側とは反対側から埋め込み膜を成膜する工程と、少なくとも前記埋め込み膜を研磨して平坦化する工程と、を更に含んでいてもよい。
前記少なくとも1つの第2積層体は、厚さが異なる複数の第2積層体であり、
前記平坦化する工程では、前記複数の第2積層体も研磨して平坦化してもよい。
前記平坦化する工程の後に、前記埋め込み膜に支持基板を接合する工程を更に含んでいてもよい。
前記第1製造方法において、前記第1積層体は、画素チップとなり、前記支持基板を接合する工程の後に、前記第1半導体基板の前記第1配線層側とは反対側に反射防止膜、カラーフィルタ及びオンチップレンズの少なくとも1つを形成する工程を更に含んでいてもよい。
本技術は、第1半導体基板及び第1配線層が積層された第1積層体の前記第1配線層と、前記第2半導体基板及び第2配線層が積層された、前記第1積層体よりも小さい第2積層体の前記第2配線層とを向かい合わせに接合する工程と、
前記第2積層体の前記第1積層体側とは反対側から埋め込み膜を成膜する工程と、
前記埋め込み膜を平坦化する工程と、
前記第2積層体の周辺の前記埋め込み膜及び前記第1配線層をエッチングして一端が前記第1配線層の層内配線に接続されるビアを形成する工程と、
前記埋め込み膜の前記第2積層体側とは反対側の面に前記ビアの他端に電気的に接続される横配線を形成する工程と、
前記横配線を保護膜で覆う工程と、
前記保護膜の前記第1積層体側とは反対側に支持基板を配置する工程と、
前記支持基板に前記横配線と接続される貫通電極を形成する工程と、
を含む、半導体装置の第2製造方法も提供する。
前記支持基板は、半導体基板であり、前記第2製造方法は、前記保護膜で覆う工程と前記支持基板を配置する工程との間に、前記保護膜上に配線層を形成する工程を更に含んでいてもよい。
前記第2製造方法において、前記第1積層体は、画素チップとなり、前記支持基板を接合する工程の後に、前記第1半導体基板の前記第1配線層側とは反対側に反射防止膜、カラーフィルタ及びオンチップレンズの少なくとも1つを形成する工程を更に含んでいてもよい。
本技術は、第1半導体基板及び第1配線層が積層された第1積層体の前記第1配線層と、前記第2半導体基板及び第2配線層が積層された、前記第1積層体よりも小さい第2積層体の前記第2配線層とを向かい合わせに接合する工程と、
前記第2積層体の前記第1積層体側とは反対側からエッチング停止層を成膜する工程と、
前記エッジング停止層の前記第1積層体側とは反対側から埋め込み膜を成膜する工程と、
前記埋め込み膜を平坦化する工程と、
前記埋め込み膜に支持基板を接合する工程と、
前記支持基板、前記第2積層体の周辺の前記埋め込み膜及び前記エッチング停止層を貫通する貫通電極を形成する工程と、
を含む、半導体装置の第3製造方法も提供する。
前記第3製造方法において、前記第1積層体は、画素チップとなり、前記支持基板を接合する工程の後に、前記第1半導体基板の前記第1配線層側とは反対側に反射防止膜、カラーフィルタ及びオンチップレンズの少なくとも1つを形成する工程を更に含んでいてもよい。
0.導入
1.本技術の一実施形態の実施例1に係る半導体装置
2.本技術の一実施形態の実施例2に係る半導体装置
3.本技術の一実施形態の実施例3に係る半導体装置
4.本技術の一実施形態の実施例4に係る半導体装置
5.本技術の一実施形態の実施例5に係る半導体装置
6.本技術の一実施形態の実施例6に係る半導体装置
7.本技術の一実施形態の実施例7に係る半導体装置
8.本技術の一実施形態の実施例8に係る半導体装置
9.本技術の一実施形態の実施例9に係る半導体装置
10.本技術の一実施形態の実施例10に係る半導体装置
11.本技術の一実施形態の実施例11に係る半導体装置
12.本技術の変形例
13.本技術を適用した固体撮像装置の使用例
14.本技術を適用した固体撮像装置の他の使用例
15.移動体への応用例
16.内視鏡手術システムへの応用例
従来、半導体装置の高性能化は、製造プロセスの微細化により、トランジスタや配線を高集積化することで実現されてきた。しかし、微細化が進むにつれ、寄生素子などの副作用による性能向上ペースの鈍化や、開発・製造コストの増加が問題となっている。
≪半導体装置の構成≫
図1は、本技術の一実施形態の実施例1に係る半導体装置10の断面図である。図2は、図1のA-A線断面図である。以下では、図1等の断面図における上側を「上」、下側を「下」として説明する。
保護膜600は、埋め込み膜500と同じ材料からなってもよいし、異なる材料からなってもよい。なお、保護膜600は設けられていなくてもよい。この場合、埋め込み膜500は、素子チップ200の裏面側に外部接続端子700の一部を覆い、他部を露出させるように設けられてもよい。
以下、半導体装置10の動作について説明する。
被写体からの光(像光)が各画素の光電変換素子に入射されると、該光電変換素子は光電変換を行う。該光電変換素子で光電変換された電気信号(アナログ信号)は、A/D変換回路に伝送されデジタル信号に変換された後、メモリ回路に一時的に記憶、保持され、順次ロジック回路に伝送される。ロジック回路は、伝送されたデジタル信号を処理する。なお、該デジタル信号は、ロジック回路での処理中及び/又は処理後にメモリ回路に一時的に記憶、保持させることもできる。
以下、半導体装置10の製造方法について、図3のフローチャート、図4A~図8Bを参照して説明する。
以下、本技術の一実施形態の実施例1に係る半導体装置10の効果について説明する。
実施例1に係る半導体装置10は、少なくとも1つの第1素子チップ100と、第1素子チップ100と積層され、第1素子チップ100よりも小さい複数(例えば)2つの第2素子チップ200とを備える。第1素子チップ100は、第1半導体基板100aと第1配線層100bとが積層された積層構造を有し、第2素子チップ200は、第2半導体基板200aと第2配線層200bとが積層された積層構造を有し、第1配線層100bと第2配線層200bとが向かい合わせに接合されている。半導体装置10は、積層方向に関して、第2素子チップ200の第1素子チップ100側とは反対側の面である裏面よりも第1素子チップ100から離れた位置に設けられた外部接続端子700と、第2素子チップ200の周辺に少なくとも一部が設けられ、第1配線層100bと外部接続端子700とを電気的に接続する配線400とを更に備える。
図9は、本技術の一実施形態の実施例2に係る半導体装置20の断面図である。実施例2に係る半導体装置20は、図9に示すように、第2素子チップ200Bの縦断面が、第1素子チップ100から遠ざかるほど幅が狭くなる略テーパ形状である点を除いて、実施例1に係る半導体装置10と同様の構成を有する。
図10は、本技術の一実施形態の実施例3に係る半導体装置30の断面図である。実施例3に係る半導体装置30は、図10に示すように、少なくとも1つのチップが第2素子チップ200に加えて少なくとも1つ(例えば1つ)のダミーチップ200C(素子が設けられていないチップ)を含む点を除いて、実施例1に係る半導体装置10と同様の構成を有する。
図11は、本技術の一実施形態の実施例4に係る半導体装置40の断面図である。実施例4に係る半導体装置40は、図11に示すように、複数の外部接続端子700の一部が、平面視において、少なくとも第2素子チップ200とは重ならない箇所に設けられている点を除いて、実施例1に係る半導体装置10と同様の構成を有する。なお、複数の外部接続端子700の全てが、平面視において、少なくとも第2素子チップ200とは重ならない箇所に設けられていてもよい。なお、複数の外部接続端子700は、平面視において、第2素子チップ又はダミーチップと一部が重なる(他部が重ならない)外部接続端子700を含んでいてもよい。
≪半導体装置の構成≫
図12は、本技術の一実施形態の実施例5に係る半導体装置50の断面図である。実施例5に係る半導体装置50は、図12に示すように、絶縁膜300が第2素子チップ200の側面側にのみ設けられ、第2素子チップ200の裏面に設けられた保護膜550を更に備える点を除いて、実施例1に係る半導体装置10と概ね同様の構成を有する。保護膜550は、例えば絶縁膜300、埋め込み膜500と同じ材料からなってもよいし、異なる材料(誘電体材料)からなってもよい。
以下、半導体装置50の製造方法について、図13のフローチャート、図14A~図15D等を参照して説明する。
実施例5に係る半導体装置50によれば、各第2素子チップ200となるチップ基材200mとして厚さが異なるものを用いても、実施例1に係る半導体装置10と同様の構造を持つ半導体装置を提供できる。すなわち、半導体装置50では、第2素子チップ200の生成に用いるチップ基材200mの選択の自由度が高い。
≪半導体装置の構成≫
図16は、本技術の一実施形態の実施例6に係る半導体装置60の断面図である。実施例6に係る半導体装置60は、図16に示すように、第1素子チップ100としての画素チップの画素領域の各画素がカラーフィルタ910及びマイクロレンズ920(オンチップレンズ)を有している点を除いて、実施例1に係る半導体装置10と概ね同様の構成を有する。画素領域には反射防止膜が設けられてもよい。第1半導体装置100aは、3~30μm程度に薄肉化されている。
以下、半導体装置60の製造方法について、図17のフローチャート、図18A~図20C等を参照して説明する。
半導体装置60によれば、プロセス温度に制約のある、カラーフィルタや、オンチップレンズの形成前に、チップ間の接合や、絶縁膜300、配線400及び埋め込み膜500の形成が可能となり、より高品質で信頼性の高い半導体装置を実現できる。また、第1素子チップ100が画素チップである場合には、第1素子チップ100の厚さを例えば30μm以下とする必要があるため、機械的強度を確保するために第2素子チップ200を厚くする必要があり、本技術の外部接続配線のレイアウトが非常に有効である。
≪半導体装置の構成≫
図21は、本技術の一実施形態の実施例7に係る半導体装置70の断面図である。実施7に係る半導体装置70は、図21に示すように、埋め込み膜500及び保護膜550を含む絶縁層を介して第2素子チップ200に接合された支持基板560を備える。外部接続端子700は、支持基板560の絶縁層側とは反対側に設けられている。
以下、半導体装置70の製造方法について、図22のフローチャート、図23A~図26C等を参照して説明する。
半導体装置70によれば、例えば第1及び第2素子チップ100、200の両方が薄い場合でも、支持基板560で機械的な強度を確保しつつ、外部接続配線及び外部接続端子700を高い集積度で配置することが可能である。また、製造中も支持基板560により、反りなどによる歩留まりの低下やプロセス精度の低下を抑制することが可能である。
図27は、本技術の一実施形態の実施例8に係る半導体装置80の断面図である。実施例8に係る半導体装置80は、図27に示すように、支持基板560が半導体基板であり、埋め込み膜500及び保護膜550を含む絶縁層と支持基板560との間に配置された配線層555を備える点を除いて、実施例7に係る半導体装置70と同様の構成を有する。支持基板560としての半導体基板には、例えばアナログ回路、ロジック回路、メモリ回路、AI回路、インターフェース回路等を含む素子が設けられている。配線層555は、絶縁膜と該絶縁膜内に設けられた内部配線とを有する。該内部配線は、支持基板560に設けられた素子と電気的に接続されている。
≪半導体装置の構成≫
図28は、本技術の一実施形態の実施例9に係る半導体装置90の断面図である。実施例9に係る半導体装置60は、図28に示すように、第1素子チップ100としての画素チップの画素領域の各画素がカラーフィルタ910及びマイクロレンズ920(オンチップレンズ)を有している点を除いて、実施例7に係る半導体装置70と概ね同様の構成を有する。例えば画素領域に反射防止膜が設けられてもよい。第1半導体装置100aは、3~30μm程度に薄肉化されている。
以下、半導体装置70の製造方法について、図29のフローチャート、図31A~図35B等を参照して説明する。
半導体装置90によれば、プロセス温度に制約のある、カラーフィルタや、オンチップレンズの形成前に、チップ間の接合や、配線、埋め込み膜及び保護膜の形成が可能となり、より高品質で信頼性の高い半導体装置を実現できる。また、第1素子チップ100が画素チップである場合には、第1素子チップ100を例えば厚さを30μm以下とする必要があるため、機械的強度を確保するために第2素子チップ200を厚くする必要があり、本技術の外部接続配線のレイアウトが非常に有効である。
≪半導体装置の構成≫
図36は、本技術の一実施形態の実施例10に係る半導体装置110の断面図である。実施例10に係る半導体装置110は、図36に示すように、第2素子チップ200に絶縁層としての埋め込み膜500を介して接合された支持基板560を備えている。外部接続端子700は、支持基板560の埋め込み膜500側とは反対側に設けられている。配線400Hは、埋め込み膜500及び支持基板560を貫通する貫通電極を有する。埋め込み膜500は、平坦化されており、支持基板560と接合されている。
以下、半導体装置110の製造方法について、図37のフローチャート、図38A~図40C等を参照して説明する。
半導体装置110によれば、比較的簡素な構成により高集積化を図ることができる半導体装置110を提供できる。
≪半導体装置の構成≫
図41は、本技術の一実施形態の実施例11に係る半導体装置111の断面図である。実施例11に係る半導体装置111は、図41に示すように、第1素子チップ100としての画素チップの画素領域の各画素がカラーフィルタ910及びマイクロレンズ920(オンチップレンズ)を有している点を除いて、実施例10に係る半導体装置10と概ね同様の構成を有する。画素領域に反射防止膜が設けられてもよい。第1半導体装置100aは、3~30μm程度に薄肉化されている。
以下、半導体装置110の製造方法について、図42及び図43に示すフローチャート、図44A~図48B等を参照して説明する。
半導体装置111によれば、プロセス温度に制約のある、カラーフィルタや、オンチップレンズの形成前に、チップ間の接合や、絶縁膜、配線及び埋め込み膜の形成が可能となり、より高品質で信頼性の高い半導体装置を実現できる。また、第1素子チップ100が画素チップである場合には、第1素子チップ100の例えば厚さを30μm以下とする必要があるため、機械的強度を確保するために第2素子チップ200を厚くする必要があり、本技術の外部接続配線のレイアウトが非常に有効である。
以上説明した各実施例の半導体装置の構成は、適宜変更可能である。
図49は、本技術に係る半導体装置(例えば各実施例及に係る半導体装置)が固体撮像装置(イメージセンサ)を構成する場合の使用例を示す図である。
本技術に係る半導体装置(例えば各実施例に係る半導体装置)は、例えば、TOF(Time Of Flight)センサなど、光を検出する他の電子機器へ適用することもできる。TOFセンサへ適用する場合は、例えば、直接TOF計測法による距離画像センサ、間接TOF計測法による距離画像センサへ適用することが可能である。直接TOF計測法による距離画像センサでは、フォトンの到来タイミングを各画素において直接時間領域で求めるため、短いパルス幅の光パルスを送信し、高速に応答する受信機で電気的パルスを生成する。その際の受信機に本開示を適用することができる。また、間接TOF法では、光で発生したキャリアーの検出と蓄積量が、光の到来タイミングに依存して変化する半導体素子構造を利用して光の飛行時間を計測する。本開示は、そのような半導体構造としても適用することが可能である。TOFセンサへ適用する場合は、図16等に示したようなカラーフィルタアレイ及びマイクロレンズアレイを設けることは任意であり、これらを設けなくても良い。
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、ロボット等のいずれかの種類の移動体に搭載される装置として実現されてもよい。
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(本技術)は、内視鏡手術システムに適用されてもよい。
(1)少なくとも1つの第1素子チップと、
前記第1素子チップと積層され、前記第1素子チップよりも小さい少なくとも1つのチップと、
を備え、
前記少なくとも1つのチップは、少なくとも1つの第2素子チップを含み、
前記第1素子チップは、第1半導体基板と第1配線層とが積層された積層構造を有し、
前記第2素子チップは、第2半導体基板と第2配線層とが積層された積層構造を有し、
前記第1配線層と前記第2配線層とが向かい合わせに接合され、
積層方向に関して、前記チップの前記第1素子チップ側とは反対側の面である裏面よりも前記第1素子チップから離れた位置に配置された外部接続端子と、
前記チップの周辺に少なくとも一部が設けられ、前記第1配線層と前記外部接続端子とを電気的に接続する配線と、
を更に備える、半導体装置。
(2)前記配線は、積層方向に延びる少なくとも1つの縦配線を有する、(1)に記載の半導体装置。
(3)前記配線は、面内方向に延び、前記縦配線と接続された少なくとも1つの横配線を有する、(2)に記載の半導体装置。
(4)前記少なくとも1つの縦配線は、前記横配線から前記第1半導体基板側に延在する少なくとも1つの第1縦配線と、前記横配線から前記第1半導体基板側とは反対側に延在する少なくとも1つの第2縦配線と、を含む、(3)に記載の半導体装置。
(5)前記配線は、少なくとも前記チップの側面に絶縁膜を介して設けられている、(1)~(4)のいずれか1つに記載の半導体装置。
(6)前記配線は、一端が前記第1配線層に電気的に接続され、且つ、他端が、積層方向に関して、前記裏面よりも前記第1素子チップから離れた位置で前記外部接続端子に接続されている、(1)~(5)のいずれか1つに記載の半導体装置。
(7)前記チップの側面側及び前記裏面側のうち少なくとも前記側面側に設けられた埋め込み膜を更に備える、(1)~(6)のいずれか1つに記載の半導体装置。
(8)前記埋め込み膜は、平坦化されている、(7)に記載の半導体装置。
(9)前記埋め込み膜は、前記チップの前記第1素子チップ側とは反対側の面側に前記外部接続端子の一部を覆うように設けられている、(7)又は(8)に記載の半導体装置。
(10)前記埋め込み膜及び前記外部接続端子の一部を覆い、該外部接続端子の他部を露出させる絶縁層を更に備える、(7)~(9)のいずれか1つに記載の半導体装置。
(11)前記チップは、前記第1素子チップから遠ざかるほど幅が狭くなる形状を有する、(1)~(10)のいずれか1つに記載の半導体装置。
(12)前記チップの縦断面は、前記第1素子チップから遠ざかるほど幅が狭くなる略テーパ形状である、(1)~(11)のいずれか1つに記載の半導体装置。
(13)前記チップの角部は、丸みを帯びている、(1)~(12)のいずれか1つに記載の半導体装置。
(14)前記少なくとも1つのチップは、少なくとも1つのダミーチップを含む、(1)~(13)のいずれか1つに記載の半導体装置。
(15)前記外部接続端子は、平面視において、少なくとも一部が前記チップとは重ならない、(1)~(14)のいずれか1つに記載の半導体装置。
(16)前記絶縁膜は、前記側面側にのみ設けられ、前記チップの前記第1素子チップ側とは反対側の面に設けられた保護膜を更に備える、(5)に記載の半導体装置。
(17)前記保護膜及び前記外部接続端子の一部を覆い、該外部接続端子の他部を露出させる別の保護膜を更に備える、(16)に記載の半導体装置。
(18)前記第1素子チップは、前記第1半導体基板に画素領域が設けられた画素チップである、(1)~(17)のいずれか1つに記載の半導体装置。
(19)前記第1素子チップは、前記第1半導体基板に接着剤層を介して透明基板が接合されている、(18)に記載の半導体装置。
(20)前記チップに絶縁層を介して接合された支持基板を更に備え、前記外部接続端子は、前記支持基板の前記絶縁層側とは反対側に設けられ、前記配線は、前記絶縁層及び/又は前記支持基板を貫通する貫通電極を有する、(1)~(19)のいずれか1つに記載の半導体装置。
(21)前記支持基板は、前記第1素子チップと略同一の大きさである、(20)に記載の半導体装置。
(22)前記絶縁層は、前記チップの側面側及び前記チップの前記第1素子チップ側とは反対側に設けられ、前記配線は、前記チップの側面側の前記絶縁層を貫通する第1貫通電極と、前記支持基板を貫通する第2貫通電極と、前記絶縁層内に配置され、前記第1及び第2貫通電極と電気的に接続する横配線と、を有する、(20)又は(21)に記載の半導体装置。
(23)前記支持基板は、半導体基板である、(20)~(22)のいずれか1つに記載の半導体装置。
(24)前記半導体基板には、素子が設けられている、(23)に記載の半導体装置。
(25)前記絶縁層は、前記チップの側面側及び前記チップの前記第1素子チップ側とは反対側に設けられ、前記貫通電極は、前記チップの側面側の前記絶縁層及び前記支持基板を貫通する、(20)~(24)に記載の半導体装置。
載の半導体装置。
(26)少なくとも、前記第1配線層の前記第2配線層とは接合されていない部分にエッチング停止層が設けられている、(20)~(25)のいずれか1つに記載の半導体装置。
(27)前記第1素子チップは、第1半導体基板に画素領域が設けられた画素チップである、(20)~(26)のいずれか1つに記載の半導体装置。
(28)前記第1素子チップは、前記第1半導体基板に接着剤層を介して透明基板が接合されている、(27)に記載の半導体装置。
(29)(1)~(28)のいずれか1つに記載の半導体装置を備える、機器。
(30)第1半導体基板及び第1配線層が積層された第1積層体の前記第1配線層と、前記第2半導体基板及び第2配線層が積層された、前記第1積層体よりも小さい少なくとも1つの第2積層体の前記第2配線層とを向かい合わせに接合する工程と、
前記第2積層体の前記第1積層体とは反対側から絶縁膜を成膜する工程と、
前記第2積層体の周辺の前記絶縁膜及び前記第1配線層をエッチングして前記第1配線層の層内配線を露出させる工程と、
前記第2積層体の少なくとも側面側に前記層内配線に接続される配線を形成する工程と、
を含む、半導体装置の製造方法。
(31)前記第2積層体の前記第1積層体とは反対側から埋め込み膜を成膜する工程と、
少なくとも前記埋め込み膜を研磨して平坦化する工程と、を更に含む、(30)に記載の半導体装置の製造方法。
(32)前記少なくとも1つの第2積層体は、厚さが異なる複数の第2積層体であり、
前記平坦化する工程では、前記複数の第2積層体も研磨して平坦化する、(31)に記載の半導体装置の製造方法。
(33)前記平坦化する工程の後に、前記埋め込み膜に支持基板を接合する工程を更に含む、(31)又は(32)に記載の半導体装置の製造方法。
(34)前記第1積層体は、画素チップとなり、前記支持基板を接合する工程の後に、前記第1半導体基板の前記第1配線層側とは反対側に反射防止膜、カラーフィルタ及びオンチップレンズの少なくとも1つを形成する工程を更に含む、(33)に記載の半導体装置の製造方法。
(35)第1半導体基板及び第1配線層が積層された第1積層体の前記第1配線層と、前記第2半導体基板及び第2配線層が積層された、前記第1積層体よりも小さい第2積層体の前記第2配線層とを向かい合わせに接合する工程と、
前記第2積層体の前記第1積層体とは反対側から埋め込み膜を成膜する工程と、
前記埋め込み膜を平坦化する工程と、
前記第2積層体の周辺の前記埋め込み膜及び前記第1配線層をエッチングして一端が前記第1配線層の層内配線に接続されるビアを形成する工程と、
前記埋め込み膜の前記第2積層体側とは反対側の面に前記ビアの他端に電気的に接続される横配線を形成する工程と、
前記横配線を保護膜で覆う工程と、
前記保護膜の前記第1積層体とは反対側に支持基板を配置する工程と、
前記支持基板に前記横配線と接続される貫通電極を形成する工程と、
を含む、半導体装置の製造方法。
(36)前記支持基板は、半導体基板であり、前記保護膜で覆う工程と前記支持基板を配置する工程との間に、前記保護膜上に配線層を形成する工程を更に含む、(35)に記載の半導体装置の製造方法。
(37)前記第1積層体は、画素チップとなり、前記支持基板を接合する工程の後に、前記第1半導体基板の前記第1配線層側とは反対側に反射防止膜、カラーフィルタ及びオンチップレンズの少なくとも1つを形成する工程を更に含む、(35)に記載の半導体装置の製造方法。
(38)第1半導体基板及び第1配線層が積層された第1積層体の前記第1配線層と、前記第2半導体基板及び第2配線層が積層された、前記第1積層体よりも小さい第2積層体の前記第2配線層とを向かい合わせに接合する工程と、
前記第2積層体の前記第1積層体側とは反対側からエッチング停止層を成膜する工程と、
前記エッジング停止層の前記第1積層体とは反対側から埋め込み膜を成膜する工程と、
前記埋め込み膜を平坦化する工程と、
前記埋め込み膜に支持基板を接合する工程と、
前記支持基板、前記第2積層体の周辺の前記埋め込み膜及び前記エッチング停止層を貫通する貫通電極を形成する工程と、
を含む、半導体装置の製造方法。
(39)前記第1積層体は、画素チップとなり、前記支持基板を接合する工程の後に、前記第1半導体基板の前記第1配線層側とは反対側に反射防止膜、カラーフィルタ及びオンチップレンズの少なくとも1つを形成する工程を更に含む、(38)に記載の半導体装置の製造方法。
(40)前記配線は、前記チップを貫通しない、(1)~(28)に記載の半導体装置。
Claims (39)
- 少なくとも1つの第1素子チップと、
前記第1素子チップと積層され、前記第1素子チップよりも小さい少なくとも1つのチップと、
を備え、
前記少なくとも1つのチップは、少なくとも1つの第2素子チップを含み、
前記第1素子チップは、第1半導体基板と第1配線層とが積層された積層構造を有し、
前記第2素子チップは、第2半導体基板と第2配線層とが積層された積層構造を有し、
前記第1配線層と前記第2配線層とが向かい合わせに接合され、
積層方向に関して、前記チップの前記第1素子チップ側とは反対側の面である裏面よりも前記第1素子チップから離れた位置に配置された外部接続端子と、
前記チップの周辺に少なくとも一部が設けられ、前記第1配線層と前記外部接続端子とを電気的に接続する配線と、
を更に備える、半導体装置。 - 前記配線は、積層方向に延びる少なくとも1つの縦配線を有する、請求項1に記載の半導体装置。
- 前記配線は、面内方向に延び、前記縦配線と接続された少なくとも1つの横配線を有する、請求項2に記載の半導体装置。
- 前記少なくとも1つの縦配線は、
前記横配線から前記第1半導体基板側に延在する少なくとも1つの第1縦配線と、
前記横配線から前記第1半導体基板側とは反対側に延在する少なくとも1つの第2縦配線と、
を含む、請求項3に記載の半導体装置。 - 前記配線は、少なくとも前記チップの側面に絶縁膜を介して設けられている、請求項1に記載の半導体装置。
- 前記配線は、一端が前記第1配線層に電気的に接続され、且つ、他端が、積層方向に関して、前記裏面よりも前記第1素子チップから離れた位置で前記外部接続端子に接続されている、請求項5に記載の半導体装置。
- 前記チップの側面側及び前記裏面側のうち少なくとも前記側面側に設けられた埋め込み膜を更に備える、請求項1に記載の半導体装置。
- 前記埋め込み膜は、平坦化されている、請求項7に記載の半導体装置。
- 前記埋め込み膜は、前記裏面側に前記外部接続端子の一部を覆うように設けられている、請求項7に記載の半導体装置。
- 前記埋め込み膜及び前記外部接続端子の一部を覆い、該外部接続端子の他部を露出させる絶縁層を更に備える、請求項7に記載の半導体装置。
- 前記チップは、前記第1素子チップから遠ざかるほど幅が狭くなる形状を有する、請求項1に記載の半導体装置。
- 前記チップの縦断面は、前記第1素子チップから遠ざかるほど幅が狭くなる略テーパ形状である、請求項1に記載の半導体装置。
- 前記チップの角部は、丸みを帯びている、請求項1に記載の半導体装置。
- 前記少なくとも1つのチップは、少なくとも1つのダミーチップを含む、請求項1に記載の半導体装置。
- 前記外部接続端子は、平面視において、少なくとも一部が前記チップとは重ならない、請求項1に記載の半導体装置。
- 前記絶縁膜は、前記側面側にのみ設けられ、
前記チップの前記裏面を覆う保護膜を更に備える、請求項5に記載の半導体装置。 - 前記保護膜及び前記外部接続端子の一部を覆い、該外部接続端子の他部を露出させる別の保護膜を更に備える、請求項16に記載の半導体装置。
- 前記第1素子チップは、前記第1半導体基板に画素領域が設けられた画素チップである、請求項1に記載の半導体装置。
- 前記第1素子チップは、前記第1半導体基板に接着剤層を介して透明基板が接合されている、請求項18に記載の半導体装置。
- 前記チップに絶縁層を介して接合された支持基板を更に備え、
前記外部接続端子は、前記支持基板の前記絶縁層側とは反対側に設けられ、
前記配線は、前記絶縁層及び/又は前記支持基板を貫通する貫通電極を有する、請求項1に記載の半導体装置。 - 前記支持基板は、前記第1素子チップと略同一の大きさである、請求項20に記載の半導体装置。
- 前記絶縁層は、前記チップの側面側及び前記裏面側に設けられ、
前記配線は、
前記チップの側面側の前記絶縁層を貫通する第1貫通電極と、
前記支持基板を貫通する第2貫通電極と、
前記絶縁層内に配置され、前記第1及び第2貫通電極と電気的に接続する横配線と、
を有する、請求項20に記載の半導体装置。 - 前記支持基板は、半導体基板である、請求項20に記載の半導体装置。
- 前記支持基板には、素子が設けられている、請求項23に記載の半導体装置。
- 前記絶縁層は、前記チップの側面側及び前記裏面側に設けられ、
前記貫通電極は、前記チップの側面側の前記絶縁層及び前記支持基板を貫通する、請求項20に記載の半導体装置。
載の半導体装置。 - 少なくとも、前記第1配線層の前記第2配線層とは接合されていない部分にエッチング停止層が設けられている、請求項25に記載の半導体装置。
- 前記第1素子チップは、第1半導体基板に画素領域が設けられた画素チップである、請求項20に記載の半導体装置。
- 前記第1素子チップは、前記第1半導体基板に接着剤層を介して透明基板が接合されている、請求項27に記載の半導体装置。
- 請求項1に記載の半導体装置を備える、機器。
- 第1半導体基板及び第1配線層が積層された第1積層体の前記第1配線層と、前記第2半導体基板及び第2配線層が積層された、前記第1積層体よりも小さい少なくとも1つの第2積層体の前記第2配線層とを向かい合わせに接合する工程と、
前記第2積層体の前記第1積層体側とは反対側から絶縁膜を成膜する工程と、
前記第2積層体の周辺の前記絶縁膜及び前記第1配線層をエッチングして前記第1配線層の層内配線を露出させる工程と、
前記第2積層体の少なくとも側面側に前記層内配線に接続される配線を形成する工程と、
を含む、半導体装置の製造方法。 - 前記第2積層体の前記第1積層体側とは反対側から埋め込み膜を成膜する工程と、
少なくとも前記埋め込み膜を研磨して平坦化する工程と、
を更に含む、請求項30に記載の半導体装置の製造方法。 - 前記少なくとも1つの第2積層体は、厚さが異なる複数の第2積層体であり、
前記平坦化する工程では、前記複数の第2積層体も研磨して平坦化する、請求項31に記載の半導体装置の製造方法。 - 前記平坦化する工程の後に、前記埋め込み膜に支持基板を接合する工程を更に含む、請求項31に記載の半導体装置の製造方法。
- 前記第1積層体は、画素チップとなり、
前記支持基板を接合する工程の後に、前記第1半導体基板の前記第1配線層側とは反対側に反射防止膜、カラーフィルタ及びオンチップレンズの少なくとも1つを形成する工程を更に含む、請求項33に記載の半導体装置の製造方法。 - 第1半導体基板及び第1配線層が積層された第1積層体の前記第1配線層と、前記第2半導体基板及び第2配線層が積層された、前記第1積層体よりも小さい第2積層体の前記第2配線層とを向かい合わせに接合する工程と、
前記第2積層体の前記第1積層体側とは反対側から埋め込み膜を成膜する工程と、
前記埋め込み膜を平坦化する工程と、
前記第2積層体の周辺の前記埋め込み膜及び前記第1配線層をエッチングして一端が前記第1配線層の層内配線に接続されるビアを形成する工程と、
前記埋め込み膜の前記第2積層体側とは反対側の面に前記ビアの他端に電気的に接続される横配線を形成する工程と、
前記横配線を保護膜で覆う工程と、
前記保護膜の前記第1積層体側とは反対側に支持基板を配置する工程と、
前記支持基板に前記横配線と接続される貫通電極を形成する工程と、
を含む、半導体装置の製造方法。 - 前記支持基板は、半導体基板であり、
前記保護膜で覆う工程と前記支持基板を配置する工程との間に、前記保護膜上に配線層を形成する工程を含む、請求項35に記載の半導体装置の製造方法。 - 前記第1積層体は、画素チップとなり、
前記支持基板を接合する工程の後に、前記第1半導体基板の前記第1配線層側とは反対側に反射防止膜、カラーフィルタ及びオンチップレンズの少なくとも1つを形成する工程を更に含む、請求項35に記載の半導体装置の製造方法。 - 第1半導体基板及び第1配線層が積層された第1積層体の前記第1配線層と、前記第2半導体基板及び第2配線層が積層された、前記第1積層体よりも小さい第2積層体の前記第2配線層とを向かい合わせに接合する工程と、
前記第2積層体の前記第1積層体側とは反対側からエッチング停止層を成膜する工程と、
前記エッジング停止層の前記第1積層体側とは反対側から埋め込み膜を成膜する工程と、
前記埋め込み膜を平坦化する工程と、
前記埋め込み膜に支持基板を接合する工程と、
前記支持基板、前記第2積層体の周辺の前記埋め込み膜及び前記エッチング停止層を貫通する貫通電極を形成する工程と、
を含む、半導体装置の製造方法。 - 前記第1積層体は、画素チップとなり、
前記支持基板を接合する工程の後に、前記第1半導体基板の前記第1配線層側とは反対側に反射防止膜、カラーフィルタ及びオンチップレンズの少なくとも1つを形成する工程を更に含む、請求項38に記載の半導体装置の製造方法。
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