WO2021040178A1 - 패키징 기판 및 이를 포함하는 반도체 장치 - Google Patents
패키징 기판 및 이를 포함하는 반도체 장치 Download PDFInfo
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- WO2021040178A1 WO2021040178A1 PCT/KR2020/004898 KR2020004898W WO2021040178A1 WO 2021040178 A1 WO2021040178 A1 WO 2021040178A1 KR 2020004898 W KR2020004898 W KR 2020004898W WO 2021040178 A1 WO2021040178 A1 WO 2021040178A1
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- H05K3/00—Apparatus or processes for manufacturing printed circuits
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- H05K3/42—Plated through-holes or plated via connections
- H05K3/425—Plated through-holes or plated via connections characterised by the sequence of steps for plating the through-holes or via connections in relation to the conductive pattern
- H05K3/426—Plated through-holes or plated via connections characterised by the sequence of steps for plating the through-holes or via connections in relation to the conductive pattern initial plating of through-holes in substrates without metal
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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- H05K3/4605—Manufacturing multilayer circuits characterized by a special circuit board as base or central core whereon additional circuit layers are built or additional circuit boards are laminated made from inorganic insulating material
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- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L2224/10—Bump connectors; Manufacturing methods related thereto
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Definitions
- the embodiment relates to a packaging substrate and a semiconductor device including the same.
- FE Front-End
- BE Back-End
- the four core technologies of the semiconductor industry that have enabled the rapid development of recent electronic products are semiconductor technology, semiconductor packaging technology, manufacturing process technology, and software technology.
- Semiconductor technology is developing in various forms, such as a line width of sub-micron nano units, more than 10 million cells, high-speed operation, and dissipating a lot of heat, but the technology for packaging it relatively completely is not supported. Accordingly, the electrical performance of the semiconductor is sometimes determined by the packaging technology and the electrical connection accordingly rather than the performance of the semiconductor technology itself.
- Ceramic or resin is used as a material for the packaging substrate.
- a ceramic substrate it is difficult to mount a high-performance, high-frequency semiconductor device due to its high resistance value or high dielectric constant.
- a resin substrate a semiconductor device of relatively high performance and high frequency can be mounted, but there is a limitation in reducing the pitch of wiring.
- An object of the embodiment is to provide a more integrated packaging substrate and a semiconductor device including the same by applying a glass substrate.
- the packaging substrate according to one embodiment,
- a core layer including a glass substrate having a first surface and a second surface facing each other;
- the core via includes a circular core via having a circular opening and a non-circular core via having an aspect ratio of the opening in the x-y direction of 1.2 or more, and
- One or two or more power transmission devices may be located on the non-circular core via.
- an electrically conductive layer having a minimum thickness of 5 ⁇ m or more may be positioned inside the non-circular core via.
- an electrically conductive layer filling 30% or more of the internal volume of the non-circular core via may be positioned inside the non-circular core via.
- the non-circular core via may include an oval, quadrilateral, L-shaped, or U-shaped opening.
- a non-circular via distribution pattern positioned inside the non-circular core via; Including,
- the filling via pattern is a predefined pattern
- the non-circular core via includes a conformal via pattern, and a filling via pattern II in which all internal spaces are filled with an electrically conductive layer;
- Any one or more of the patterns may be included.
- the composite via pattern In one embodiment, the composite via pattern,
- a composite via pattern I in which an electrically conductive layer is formed to substantially contact the inner diameter surface of the non-circular core via, and an insulating layer is filled in the rest of the non-circular core via;
- the electrically conductive layer of the non-circular via distribution pattern and the electrode of the power transmission device may be connected.
- the core via includes a first opening in contact with the first surface; A second opening in contact with the second surface; And a minimum inner diameter portion, which is a region having the narrowest inner diameter of the entire core via connecting the first opening and the second opening.
- a semiconductor device portion including at least one semiconductor device
- It may include; a motherboard electrically connected to the packaging substrate and transmitting and connecting an external electrical signal to the semiconductor device.
- the packaging substrate of the embodiment and a semiconductor device including the same may significantly improve electrical characteristics such as a signal transmission speed by connecting the semiconductor device and the motherboard closer to each other so that the electrical signal is transmitted over the shortest distance possible.
- the glass substrate applied as the core of the substrate is itself an insulator, there is almost no fear of generation of parasitic elements compared to the conventional silicon core, so that the insulating film treatment process can be more simplified and can be applied to high-speed circuits.
- FIG. 1 is a conceptual diagram (a) illustrating a state in which core vias and non-circular vias are formed according to an embodiment, and a conceptual diagram (b) illustrating an arrangement of a power transmission device.
- FIG. 2(a) is a conceptual diagram illustrating a part of a-a' cross-section of FIG. 1(a)
- (b) is a conceptual diagram illustrating a part of a-b-b' cross-section of FIG. 1(a).
- 3A to 3D are conceptual diagrams illustrating, in cross section, a distribution pattern formed on a non-circular via according to an embodiment.
- 4A and 4B are conceptual diagrams illustrating a state in which a power transmission device is disposed on a non-circular via of an embodiment, respectively, in a cross section in the x-z direction (a) and a cross section in the y-z direction (b).
- FIG. 5 is a conceptual diagram illustrating a cross section of a semiconductor device according to an embodiment.
- FIG. 6 is a conceptual diagram illustrating a cross section of a packaging substrate according to another embodiment.
- 7A and 7B are conceptual diagrams each illustrating a cross section of a core via applied in an embodiment.
- FIGS. 8 and 9 are detailed conceptual diagrams each illustrating a part of a cross section of a packaging substrate according to an embodiment (a circle represents a state observed from an upper surface or a lower surface).
- 10 to 11 are flow charts illustrating a manufacturing process of a packaging substrate according to an embodiment in cross section.
- the term "combination of these" included in the expression of the Makushi format refers to one or more mixtures or combinations selected from the group consisting of the components described in the expression of the Makushi format, and the constituent elements It means to include one or more selected from the group consisting of.
- the “ ⁇ ” system may mean including a compound corresponding to “ ⁇ ” or a derivative of “ ⁇ ” in the compound.
- B is located on A means that B is located directly on A or B is located on A while another layer is located between them, and B is located so as to contact the surface of A. It is limited to that and is not interpreted.
- the inventors recognized that not only the device itself but also the packaging part is an important factor in improving the performance, and were researching it.
- the glass core is applied as a single layer, and the shape of the through via, the electrically conductive layer formed therein, etc.
- the packaging substrate could be made thinner and conducive to the improvement of the electrical characteristics of the semiconductor device, and the invention was completed.
- the inventors recognized the problem that there is a limitation in the efficiency of electric signal transmission with circular through-holes formed using drills in the existing organic substrate, especially in the case of power transmission devices. It was confirmed that this problem can be solved by utilizing a non-circular via that can be formed in and the present invention was completed.
- a semiconductor device 100 includes a semiconductor device part 30 in which one or more semiconductor devices 32, 34, and 36 are positioned; A packaging substrate 20 electrically connected to the semiconductor device; And a motherboard 10 that is electrically connected to the packaging substrate, transmits an external electrical signal to the semiconductor device, and connects to each other.
- the packaging substrate 20 includes a core layer 22; And an upper layer 26;
- the semiconductor device part 30 refers to devices mounted on a semiconductor device, and is mounted on the packaging substrate 20 by connection electrodes or the like.
- the semiconductor device unit 30 includes, for example, an arithmetic device such as a CPU and a GPU (first device: 32, a second device: 34), a memory device such as a memory chip (third device, 36), and the like.
- an arithmetic device such as a CPU and a GPU
- a memory device such as a memory chip
- any semiconductor device mounted on a semiconductor device can be applied without limitation.
- the motherboard 10 may be a motherboard such as a printed circuit board or a printed wiring board.
- the packaging substrate 20 includes a core layer 22; And an upper layer 26 positioned on one surface of the core layer.
- the packaging substrate 20 may further include a lower layer 29 selectively positioned under the core layer.
- the core layer 22 includes a glass substrate 21; A plurality of core vias 23 penetrating the glass substrate in the thickness direction; And a core distribution layer on which an electroconductive layer is located on the surface of the glass substrate or the core via, at least a part of which electrically connects the electroconductive layer on the first surface and the second surface through the core via ( 24); includes.
- the glass substrate 21 has a first surface 213 and a second surface 214 facing each other, and the two surfaces are substantially parallel to each other, so that the entire glass substrate has a constant thickness.
- Core vias 23 penetrating the first and second surfaces are positioned on the glass substrate 21.
- a silicon substrate and an organic substrate are stacked.
- silicon substrates due to the nature of semiconductors, parasitic elements may occur when applied to high-speed circuits, and power losses are relatively large.
- organic substrates a larger area is required to form a more complex distribution pattern, but this does not correspond to the flow of manufacturing microelectronic devices.
- it is necessary to substantially refine the pattern but there is a practical limit to pattern refinement due to the characteristics of materials such as polymers applied to organic substrates.
- the glass substrate 21 is applied as a support for the core layer 22.
- the core via 23 formed while penetrating the glass substrate together with the glass substrate the length of the electrical flow is shorter, smaller, faster response, and the packaging substrate 20 having less loss characteristics. to provide.
- the glass substrate 21 is preferably a glass substrate applied to a semiconductor.
- a borosilicate glass substrate, an alkali-free glass substrate, etc. may be applied, but the present invention is not limited thereto.
- the glass substrate 21 may have a thickness of 1,000 ⁇ m or less, may be 100 to 1,000 ⁇ m, and may be 100 to 700 ⁇ m. More specifically, the glass substrate 21 may have a thickness of 100 to 500 ⁇ m. Forming a thinner packaging substrate is advantageous in that electrical signal transmission can be more efficient, but it should also serve as a support, so it is preferable to apply the glass substrate 21 having the above-described thickness.
- the thickness of the glass substrate refers to the thickness of the glass substrate itself excluding the thickness of the electrically conductive layer on the glass substrate.
- the core via 23 may be formed by removing a predetermined region of the glass substrate 21, and specifically, may be formed by etching plate-shaped glass by physical and/or chemical methods.
- a method of chemically etching after forming defects (faults) on the surface of a glass substrate by a method such as a laser, or a laser etching method may be applied, but is not limited thereto.
- the core via 23 includes a circular core via 231a having a substantially circular opening and a non-circular core via 231b having an aspect ratio of the opening in the x-y direction of 1.2 or more.
- the circular core via 231a is referred to as a circular shape, but generally refers to a general core via having an aspect ratio of substantially 1 in the x-y direction, and is not limited to an exact circular shape.
- the non-circular core via 231b includes an opening having an oval shape, a square shape, an L shape, or a U shape, and there is no particular limitation on the shape of the non-circular core via 231b. Accordingly, the non-circular core via may have a trapezoidal shape, a square shape, or the like.
- the non-circular core via 231b has an aspect ratio in the x-y direction having an opening of a certain level or higher.
- one or two or more power transmission devices may be connected to the non-circular core via, and at least a portion of the power transmission device (eg, an electrode at one end) is electrically connected to the non-circular core via to be disposed. I can.
- Power transmission devices such as multilayer ceramic capacitors (MLCC) play an important role in the performance of semiconductor devices.
- MLCC multilayer ceramic capacitors
- more than 200 power transmission devices which are passive devices, are generally applied to semiconductor devices, and their performance is affected by the characteristics of the electrical conductive layer around the device in transmitting power.
- a non-circular core via 231b is applied to a place where an electric conductive layer of low resistance is required, such as such a power transmission device.
- a core via is formed and the upper and lower portions of the substrate are connected with an electrically conductive material through the core via, so that the current connected to the power transmission device passes through the glass substrate and is connected.
- the sheet resistance that affects power transfer is a factor that is affected by the cross-sectional area of the electrically conductive layer, and the cross-sectional area of the electrically conductive layer is limited to less than the cross-sectional area of the via. Therefore, in order to increase the size of the current delivered to the power transmission device, the cross-sectional area of the core via must be increased. However, it was not easy to increase the cross-sectional area of the core via by applying the conventional drill penetrating method.
- a non-circular elliptical via having a large x-y aspect ratio in the non-circular core via 231b and a relatively large cross-sectional area may be applied.
- Such a non-circular elliptical via has an advantage that an electrically conductive layer can be formed in a sufficient volume in an intended shape therein.
- a chemical via formation process e.g., chemical etching
- defects for non-circular core via formation in the process of creating a defect at the via formation location before etching is included in the via formation rather than a mechanical formation method, so defects for non-circular core via formation in the process of creating a defect at the via formation location before etching.
- circular core vias and non-circular core vias can be formed at the same time without adding a separate etching process.
- the non-circular core via 231b may have an aspect ratio of 1.2 or more in the x-y direction of the opening, 2 or more, and 3 or more.
- the aspect ratio in the x-y direction of the opening of the non-circular core via 231b may be 25 or less, 20 or less, and 15 or less. In the case of forming the opening of the non-circular core via in this range, it is more advantageous for device arrangement.
- An electrically conductive layer having a minimum thickness of 5 ⁇ m or more may be positioned inside the non-circular core via 231b.
- the non-circular via distribution pattern 242 which is an electrically conductive layer located inside the non-circular core via 231b, may have a thickness of 10 ⁇ m or more and may have a thickness of 15 ⁇ m or more.
- the maximum thickness of the non-circular via distribution pattern 242 is a thickness when the inside of the non-circular core via is filled and depends on the size of the non-circular core via, so the upper limit is not specified.
- An electrically conductive layer filling 30% or more of the internal volume of the non-circular core via may be positioned inside the non-circular core via. That is, the volume of the non-circular via distribution pattern 242 may be 30% or more, 40% or more, and 50% or more when the volume of the non-circular core via is 100%. In addition, the non-circular via distribution pattern 242 may have a volume of 60% or more, 70% or more, and 80% or more when the volume of the non-circular core via is 100%.
- An insulating layer core insulating layer 223) may be located inside the non-circular core via in which the non-circular via distribution pattern is not located.
- the non-circular via distribution pattern 242 may have various shapes.
- the non-circular via distribution pattern 242 may be formed in the form of a conformal via pattern 242a (conformal) in which an electrical conductive layer surrounds the inner surface of the non-circular core via.
- the non-circular via distribution pattern 242 may be formed in the form of a filling via pattern that fills all the internal spaces of the non-circular core via.
- the filling via pattern may have a form 242b (filling via pattern I) in which all of the internal space of the non-circular core via is filled with the filling via, and the inside of the filling via pattern is once formed. It may be in the form of a form 242c (fill via pattern II) in which all are filled to form a fill via pattern.
- the non-circular via distribution pattern 242 may be a composite via pattern in which a part of the internal space of the non-circular core via is filled with an electrically conductive layer and the remaining part is filled with an insulating layer or the like. Specifically, an electrically conductive layer is formed to substantially contact the inner mirror surface of the non-circular core via, and an insulating layer is filled in the remaining portion (central portion) where the electrically conductive layer is not formed (242d, composite via pattern I)
- the insulating layer may be formed to substantially contact the inner diameter surface of the non-circular core via, and an electrically conductive layer may be formed in a space other than the insulating layer 242e (composite via pattern II). Accordingly, a cross section of the non-circular via distribution pattern viewed from a surface cut parallel to the first surface of the glass substrate may have a shape such as an oval, a square, or an elliptical ring having a long cross section.
- the shape and configuration of the non-circular via distribution pattern may be adjusted according to the degree of intended electrical conductivity (the degree of sheet resistance) and the performance, size, and number of power transmission devices positioned on the non-circular via distribution pattern.
- the power transmission device 48 may be electrically connected to the non-circular via distribution pattern 242 passing through the non-circular core via 231b, and 1 or 2 electric power devices per non-circular core via The above can be electrically connected.
- the electrical connection may be formed in a form in which an electrode 481 of one side of the power transmission device is disposed on the non-circular via distribution pattern 242.
- the electrical connection may be a method of connecting the non-circular via distribution pattern 242 and/or the electrical conductive layer of the non-circular via distribution pattern and the electrode 481 of the power transmission device as a separate distribution pattern. .
- the core via 23 may include a first opening 233 in contact with the first surface; A second opening 234 in contact with the second surface; And a minimum inner diameter portion 235, which is a region having the narrowest inner diameter of the entire core via connecting the first opening and the second opening.
- the diameter of the first opening (CV1) and the diameter of the second opening (CV2) may be substantially different, and the first opening (CV1) and the second opening (CV2) may have substantially the same diameter. .
- the minimum inner diameter portion may be located in the first opening or the second opening, and in this case, the core via may be a cylindrical or (cut off) triangular pyramidal core via.
- the diameter of the minimum inner diameter (CV3) corresponds to the diameter of the smaller one of the first opening and the second opening.
- the minimum inner diameter portion is located between the first opening and the second opening, and the core via may be a barrel-shaped core via.
- the diameter of the minimum inner diameter (CV3) may be smaller than a larger one of the diameter of the first opening and the diameter of the second opening.
- the core distribution layer 24 includes a core distribution pattern 241, which is an electrically conductive layer electrically connecting the first and second surfaces of the glass substrate through a through via, and a core insulating layer 223 surrounding the core distribution pattern. ).
- the core layer 22 has an electrical conductive layer formed therein through a core via, and serves as an electrical path across the glass substrate 21, and connects the upper and lower portions of the glass substrate over a relatively short distance to provide a faster electrical connection. It can have the characteristics of signal transmission and low loss.
- the core distribution pattern 241 is a pattern that electrically connects the first surface 213 and the second surface 214 of the glass substrate through a core via 23.
- a first surface distribution pattern 241a which is an electrically conductive layer positioned on at least a portion
- a second surface distribution pattern 241c which is an electrically conductive layer, positioned on at least a portion of the second surface 214
- the first And a core via distribution pattern 241b that is an electrically conductive layer electrically connecting the surface distribution pattern and the second surface distribution pattern to each other through the core via 23.
- the electrically conductive layers may be, for example, applied with a copper plating layer, but are not limited thereto.
- the glass substrate 21 serves as an intermediate and intermediary for connecting the semiconductor device 30 and the motherboard 10 to the upper and lower portions, respectively, and the core via 23 serves as a path through which electrical signals are transmitted.
- the signal is smoothly transmitted to the following.
- the thickness of the electroconductive layer measured from the larger of the first surface opening diameter and the second surface opening diameter may be equal to or thicker than the thickness of the electroconductive layer formed on a portion of the core via having a minimum inner diameter.
- the core distribution layer 24 is an electrically conductive layer formed on a glass substrate, and a cross cut adhesion test value according to ASTM D3359 may satisfy 4B or more, and specifically 5B or more.
- the electroconductive layer, which is the core distribution layer 24 may have an adhesive force of 3 N/cm or more with the glass substrate, and may have a bonding force of 4.5 N/cm or more. When this degree of adhesion is satisfied, it has sufficient adhesion between the substrate and the electrically conductive layer to be applied as a packaging substrate.
- An upper layer 26 is positioned on the first surface 213.
- the upper layer 26 includes an upper distribution layer 25 and a top connection layer 27 positioned on the upper distribution layer, and the uppermost surface of the upper layer 26 can directly contact the connection electrodes of the semiconductor device. It may be protected by the cover layer 60 in which the opening is formed.
- the upper distribution layer 25 includes an upper insulating layer 253 positioned on the first surface;
- the core distribution layer 24 and at least a portion thereof are electrically conductive layers having a predetermined pattern and include an upper distribution pattern 251 embedded in the upper insulating layer.
- the upper insulating layer 253 may be applied as long as it is applied as an insulator layer to a semiconductor device or a packaging substrate, and for example, an epoxy resin including a filler may be applied, but is not limited thereto.
- the insulator layer may be formed by forming a coating layer and curing, or may be formed by laminating and curing an insulator film filmed in an uncured or semi-cured state on the core layer. In this case, if a pressure-sensitive lamination method or the like is applied, the insulator is embedded into the space inside the core via, so that an efficient process can be performed. In addition, even if a plurality of insulator layers are stacked and applied, it may be difficult to substantially distinguish between insulator layers, and a plurality of insulator layers are collectively referred to as an upper insulating layer. In addition, the same insulating material may be applied to the core insulating layer 223 and the upper insulating layer 253, and in this case, the boundary may not be substantially separated.
- the upper distribution pattern 251 refers to an electrically conductive layer positioned within the upper insulating layer 253 in a preset shape, and may be formed in, for example, a build-up layer method. Specifically, an insulator layer is formed, an unnecessary portion of the insulator layer is removed, an electrical conductive layer is formed by copper plating, etc., and an unnecessary portion of the electrical conductive layer is selectively removed. After forming a layer, removing unnecessary parts again, repeating the method of forming an electroconductive layer by plating, etc., to form the upper distribution pattern 251 in which the battery conductive layer is formed in the vertical or horizontal direction in the intended pattern. I can.
- the upper distribution pattern 251 is located between the core layer 22 and the semiconductor device part 30, the transfer of the electrical signal to the semiconductor device part 30 proceeds smoothly and the intended complex pattern is sufficient. It is formed to include a fine pattern in at least a part of it so that it can be accommodated.
- the fine pattern may have a width and a spacing of less than about 4 ⁇ m, less than about 3.5 ⁇ m, less than about 3 ⁇ m, less than about 2.5 ⁇ m, and about 1 to about It may be 2.3 ⁇ m.
- the spacing may be a spacing between fine patterns adjacent to each other (hereinafter, the description of the fine patterns is the same).
- the upper distribution pattern 251 to include a fine pattern, at least two or more methods are applied in the embodiment.
- the glass substrate 21 may have a fairly flat surface characteristic with a surface roughness Ra of 10 angstroms or less, and thus, the influence of the surface morphology of the support substrate on the formation of a fine pattern can be minimized.
- the other is in the characteristics of the insulator.
- a filler component is often applied together with a resin, and inorganic particles such as silica particles may be applied as the filler.
- inorganic particles such as silica particles
- the size of the inorganic particles may affect whether or not a fine pattern is formed.
- a particulate filler having an average diameter of about 150 nm or less is applied.
- it includes a particulate filler having an average diameter of about 1 to about 100 nm.
- the top connection layer 27 is electrically connected to the top distribution pattern 251 and at least a portion thereof, and includes a top connection pattern 272 located on the top insulating layer 253, the semiconductor device part 30, and the And a top connection electrode 271 electrically connecting the top connection pattern 272 to each other.
- the top connection pattern 272 may be positioned on one surface of the upper insulating layer 253, or at least a portion thereof may be exposed and embedded on the upper insulating layer.
- the upper insulating layer may be formed by a method such as plating, and a part of the top surface connection pattern is exposed on the upper insulating layer. If it is embedded, a part of the insulating layer or the electrically conductive layer may be removed by a method such as surface polishing or surface etching after forming a copper plating layer or the like.
- the top connection pattern 272 may include at least a part of a fine pattern. In this way, the top connection pattern 272 including a fine pattern allows a plurality of devices to be electrically connected even under a narrow area, thereby making electrical signal connection between devices more smooth and more integrated packaging possible. Do.
- the top connection electrode 271 may be directly connected to the semiconductor device unit 30 through a terminal or the like, or may be connected via a device connection part 51 such as a solder ball.
- the packaging substrate 20 is also connected to the motherboard 10.
- a second surface distribution pattern 241c which is a core distribution layer positioned on at least a portion of the second surface 214 of the core layer 22, may be directly connected to a terminal of the motherboard. In addition, it may be electrically connected through a board connection such as a solder ball. In addition, the second surface distribution pattern 241c may be connected to the motherboard 10 through a lower layer 29 positioned under the core layer 22.
- the lower layer 29 includes a lower partial double layer 291 and a lower surface connection layer 292.
- the lower partial double layer 291 includes: i) a lower insulating layer 291b in which the second surface 214 and at least a portion thereof are in contact with each other; And ii) a lower partial distribution pattern 291a which is embedded (buried) in the lower insulating layer and has a predetermined pattern, and the core distribution layer and at least a portion thereof are electrically connected to each other.
- the lower surface connection layer 292 includes i) a lower surface connection electrode 292a that is electrically connected to the lower surface connection pattern, and ii) the lower partial belly pattern and at least a portion thereof are electrically connected, and is formed on one surface of the lower insulating layer. It may further include a lower surface connection pattern (292b) at least a portion of which is exposed.
- the lower surface connection pattern 292b is a portion connected to the motherboard 10 and may be formed as a non-fine pattern having a width wider than that of the fine pattern unlike the upper surface connection pattern 272 for more efficient electrical signal transmission.
- One of the characteristics of the present invention is that substantially no other substrates other than the glass substrate 21 are applied to the packaging substrate 20 positioned between the semiconductor device part 30 and the motherboard 10.
- an interposer and an organic substrate were stacked together to apply an interposer and an organic substrate between the device and the motherboard.
- This is understood to have been applied in a multi-stage form for at least two reasons.
- One is that there is a scale problem in directly bonding the fine pattern of the device to the motherboard, and the other is that during the bonding process or driving the semiconductor device. This is because a problem of wiring damage due to a difference in thermal expansion coefficient may occur during the process.
- a glass substrate having a coefficient of thermal expansion similar to that of a semiconductor device is applied, and a fine pattern having a fine scale sufficient for device mounting is formed on the first surface and the upper layer of the glass substrate, thereby solving this problem.
- the semiconductor device 100 has a packaging substrate 20 having a considerably thin thickness, so that the overall thickness of the semiconductor device can be reduced, and by applying a fine pattern, an intended electrical connection pattern can be arranged even in a narrower area.
- the packaging substrate may have a thickness of about 2000 ⁇ m or less, about 1500 ⁇ m or less, and about 900 ⁇ m.
- the packaging substrate may have a thickness of about 120 ⁇ m or more and about 150 ⁇ m or more.
- the packaging substrate electrically and structurally stably connects the device and the motherboard even with a relatively thin thickness due to the characteristics described above, and may further contribute to a smaller and thinner semiconductor device.
- a method of manufacturing a packaging substrate includes: a preparation step of forming defects at predetermined positions on a first surface and a second surface of the glass substrate; An etching step of preparing a glass substrate on which a core via is formed by applying an etching solution to the glass substrate on which the defects are formed; A core layer manufacturing step of forming a core layer by plating the surface of the glass substrate on which the core via is formed to form a core distribution layer, which is an electrically conductive layer; In addition, an upper layer manufacturing step of forming an upper distribution layer, which is an electrically conductive layer wrapped in an insulating layer, on one surface of the core layer, to manufacture the packaging substrate described above.
- the shape of the defect includes a circular defect for forming a circular core via and a non-circular defect formed entirely along the cross-section of the non-circular core via for forming a non-circular core via. Due to these defects, since circular core vias and non-circular core vias are simultaneously formed in the etching step, it is possible to have superior workability compared to separately working with a drill to form vias on an organic substrate.
- the core layer manufacturing step includes a pretreatment process of forming a pretreated glass substrate by forming an organic-inorganic composite primer layer including nanoparticles having an amine group on the surface of the glass substrate on which the core via is formed; And a plating process of plating a metal layer on the pretreated glass substrate.
- the core layer manufacturing step may include a pretreatment process of forming a pretreated glass substrate by forming a metal-containing primer layer through sputtering on the surface of the glass substrate on which the core via is formed; And a plating process of plating a metal layer on the pretreated glass substrate.
- An insulating layer forming step may be further included between the core layer manufacturing step and the upper layer manufacturing step.
- the insulating layer forming step may be a step of forming a core insulating layer by placing an insulating film on the core layer and then performing pressure-sensitive lamination.
- the manufacturing method of the packaging substrate will be described in more detail.
- a glass substrate applied to a substrate of an electronic device may be applied.
- an alkali-free glass substrate may be applied, but the present invention is not limited thereto.
- products manufactured by manufacturers such as Corning, Short, and AGC can be applied. Methods such as mechanical etching and laser irradiation may be applied to the formation of the defects (grooves).
- Etching step core via formation step: The glass substrate 21a on which the defects (grooves, 21b) are formed is formed with the core via 23 through a physical or chemical etching process. During the etching process, a via is formed in the defective portion of the glass substrate, and at the same time, the surface of the glass substrate 21a may be etched at the same time. In order to prevent the etching of the glass surface, a masking film or the like may be applied, but the defective glass substrate itself can be etched in consideration of the hassle of applying and removing the masking film. The thickness of the glass substrate having the core via may be somewhat thinner than the thickness.
- Core layer manufacturing step An electrically conductive layer 21d is formed on a glass substrate.
- the electroconductive layer may be a metal layer including a copper metal, but is not limited thereto.
- the surface of the glass (including the surface of the glass substrate and the surface of the core via) and the surface of the copper metal have different properties, so the adhesive strength tends to be poor.
- the adhesion between the glass surface and the metal was improved by two methods, a dry method and a wet method.
- the dry method is a method of applying sputtering, that is, a method of forming the seed layer 21c on the glass surface and the inner diameter of the core via by metal sputtering.
- sputtering that is, a method of forming the seed layer 21c on the glass surface and the inner diameter of the core via by metal sputtering.
- dissimilar metals such as titanium, chromium, and nickel may be sputtered together with copper, and in this case, it is believed that glass-metal adhesion is improved due to an anchor effect in which the surface morphology of the glass and metal particles interact do.
- the wet method is a method of performing a primer treatment, and is a method of forming the primer layer 21c by pre-treating with a compound having a functional group such as an amine.
- a primer treatment may be performed with a compound or particle having an amine functional group after pretreatment with a silane coupling agent.
- the support substrate of the embodiment needs to be of high performance enough to form a fine pattern, and this must be maintained even after the primer treatment. Therefore, when such a primer contains nanoparticles, nanoparticles having an average diameter of 150 nm or less are preferably applied. For example, nanoparticles are preferably applied to particles having an amine group.
- the primer layer may be formed by applying an adhesion improving agent manufactured by MEC's CZ series, for example.
- the electroconductive layer may selectively form a metal layer with or without removing portions that do not require formation of the electroconductive layer.
- a portion requiring or unnecessary formation of an electroconductive layer may be selectively processed in a state activated or deactivated for metal plating, thereby performing a subsequent process.
- the activation or deactivation treatment may be applied to a light irradiation treatment such as a laser having a predetermined wavelength, or a chemical treatment.
- the metal layer may be formed using a copper plating method applied to semiconductor device manufacturing, but is not limited thereto.
- the thickness of the formed electrically conductive layer may be controlled by adjusting various variables such as the concentration of the plating solution, the plating time, and the type of additive to be applied.
- a part of the core distribution layer is unnecessary, it may be removed, and after the seed layer is partially removed or deactivated, metal plating is performed to form an electrically conductive layer in a predetermined pattern, and the etching layer 21e of the core distribution layer May be formed
- the core via may undergo an insulating layer forming step in which an empty space is filled with an insulating layer after forming the core distribution layer, which is the electrically conductive layer.
- the applied insulating layer may be manufactured in the form of a film, and may be applied, for example, by a method of vacuum lamination of the insulating layer in the form of a film. When the pressure-sensitive lamination is performed in this way, the insulating layer is sufficiently penetrated into the empty space inside the core via to form a core insulating layer without void formation.
- Upper layer manufacturing step This is a step of forming an upper distribution layer including an upper insulating layer and an upper distribution pattern on the core layer.
- the upper insulating layer may be performed by coating a resin composition forming the insulating layer 23a or stacking an insulating film, and simply stacking an insulating film is preferably applied. Lamination of the insulating film may be performed by laminating and curing the insulating film. In this case, if the pressure-sensitive lamination method is applied, the insulating resin may be sufficiently contained even in a layer in which an electrically conductive layer is not formed inside the core via.
- the upper insulating layer is also in direct contact with the glass substrate in at least a portion thereof, and thus, a material having sufficient adhesion is applied. Specifically, it is preferable that the glass substrate and the upper insulating layer have a property that satisfies an adhesion test value of 4B or more according to ASTM D3359.
- the upper distribution pattern may be formed by repeating the process of forming the insulating layer 23a, forming the electrically conductive layer 23c in a predetermined pattern, and etching unnecessary portions to form the etching layer 23d of the electrically conductive layer.
- a blind via 23b may be formed in the insulating layer and then a plating process may be performed.
- the blind via may be formed by a dry etching method such as laser etching or plasma etching, or a wet etching method using a masking layer and an etching solution.
- the top connection pattern and the top connection electrode may also be formed in a process similar to that of the formation of the top distribution layer. Specifically, it is formed by forming an etching layer 23f of an insulating layer on the insulating layer 23e, forming an electrically conductive layer 23g thereon again, and then forming an etching layer 23h of the electrically conductive layer. However, it may be applied as a method of selectively forming only an electrically conductive layer without applying an etching method.
- the cover layer may be formed such that an opening (not shown) is formed at a position corresponding to the top connection electrode to expose the top connection electrode, and can be directly connected to the device connection part or the terminal of the device.
- a lower surface connection layer and a cover layer In a manner similar to the above-described step of forming the top connection layer and the cover layer, a lower partial rear layer and/or a bottom connection layer, and a cover layer (not shown) may be formed.
- semiconductor device part 32 first semiconductor device
- packaging substrate 22 core layer
- top connection layer 271 top connection electrode
- connection part 51 element connection part
- insulating layer 23b etching layer of the insulating layer
- electroconductive layer 23d etching layer of electroconductive layer
- electroconductive layer 23h etching layer of electroconductive layer
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Abstract
Description
Claims (10)
- 서로 마주보는 제1면과 제2면을 갖는 유리기판;을 포함하는 코어층; 및상기 유리기판을 두께 방향으로 관통하는 다수의 코어비아;를 포함하고,상기 코어비아는 개구부가 원형인 원형코어비아와 개구부의 x-y 방향 종횡비가 1.2 이상인 비원형코어비아;를 포함하며,상기 비원형코어비아 상에는 1 또는 2개 이상의 전력전달소자가 위치하는, 패키징 기판.
- 제1항에 있어서,상기 비원형코어비아의 내부에는 최소 두께가 5 ㎛ 이상인 전기전도성층이 위치하는, 패키징 기판.
- 제1항에 있어서,상기 비원형코어비아의 내부에는, 상기 비원형코어비아의 내부 부피의 30 % 이상을 채우는 전기전도성층이 위치하는, 패키징 기판.
- 제1항에 있어서,상기 비원형코어비아는 그 개구부의 형태가 타원형, 사각형, L형, 또는 U형인 것을 포함하는, 패키징 기판.
- 제1항에 있어서,상기 비원형코어비아의 내부에 위치하는 비원형비아분배패턴;을 포함하고,상기 비원형비아분배패턴은,상기 비원형코어비아의 내부 공간을 모두 전기전도성층으로 채워진 충진비아패턴; 및상기 비원형코어비아의 내부 공간 일부는 전기전도성층으로 채워지고 나머지 부분은 절연층으로 채워진 복합형비아패턴;중 어느 하나 이상을 포함하는, 패키징 기판.
- 제5항에 있어서,상기 충진비아패턴은,상기 비원형코어비아의 내부공간이 모두 전기전도성층으로 충진된 충진비아패턴 I; 및상기 비원형코어비아는 내경면을 전기전도성층이 감싸는 형태인 컨포멀비아패턴을 포함하고, 그 내부공간이 모두 전기전도성층으로 충진된 충진비아패턴 II;중 어느 하나 이상의 패턴을 포함하는, 패키징 기판.
- 제5항에 있어서,상기 복합형비아패턴은,상기 비원형코어비아의 내경면과 실질적으로 맞닿도록 전기전도성층이 형성되고, 상기 비원형코어비아 내 나머지 부분에 절연층이 채워진 복합형비아패턴 I; 및상기 비원형코어비아의 내경면과 실질적으로 맞닿도록 절연층이 형성되고, 상기 절연층 외의 공간에 전기전도성층이 형성된 복합형비아패턴 II;중 어느 하나 이상을 포함하는, 패키징 기판.
- 제5항에 있어서,상기 비원형비아분배패턴의 전기전도성층과 상기 전력전달소자의 전극이 연결되는, 패키징 기판.
- 제1항에 있어서,상기 코어비아는 상기 제1면과 접하는 제1개구부; 상기 제2면과 접하는 제2개구부; 그리고 상기 제1개구부와 제2개구부를 연결하는 전체 코어비아에서 그 내경이 가장 좁은 구역인 최소내경부;를 포함하는, 패키징 기판.
- 1 이상의 반도체소자를 포함하는 반도체소자부;상기 반도체소자부와 전기적으로 연결되는 패키징 기판; 및상기 패키징 기판과 전기적으로 연결되며 상기 반도체소자와 외부의 전기적 신호를 전달하고 서로 연결하는 마더보드;를 포함하고, 상기 패키징 기판은 제1항에 따른 패키징 기판인, 반도체 장치.
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JP2021536270A JP7104245B2 (ja) | 2019-08-23 | 2020-04-10 | パッケージング基板及びこれを含む半導体装置 |
EP20859518.1A EP3905323B1 (en) | 2019-08-23 | 2020-04-10 | Packaging substrate and semiconductor device comprising same |
KR1020227020326A KR20220089715A (ko) | 2019-08-23 | 2020-04-10 | 패키징 기판 및 이를 포함하는 반도체 장치 |
KR1020217015656A KR102413117B1 (ko) | 2019-08-23 | 2020-04-10 | 패키징 기판 및 이를 포함하는 반도체 장치 |
US17/460,966 US11469167B2 (en) | 2019-08-23 | 2021-08-30 | Packaging substrate having electric power transmitting elements on non-circular core via of core vias and semiconductor device comprising the same |
JP2022110012A JP7416868B2 (ja) | 2019-08-23 | 2022-07-07 | パッケージング基板及びこれを含む半導体装置 |
US17/866,623 US11728259B2 (en) | 2019-08-23 | 2022-07-18 | Packaging substrate having electric power transmitting elements on non-circular core via of core vias and semiconductor device comprising the same |
US18/324,031 US12027454B1 (en) | 2019-08-23 | 2023-05-25 | Packaging substrate having electric power transmitting elements on non-circular core via of core vias and semiconductor device comprising the same |
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EP3905323A1 (en) | 2021-11-03 |
US12027454B1 (en) | 2024-07-02 |
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US11728259B2 (en) | 2023-08-15 |
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CN113366633A (zh) | 2021-09-07 |
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US20210391243A1 (en) | 2021-12-16 |
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KR102413117B1 (ko) | 2022-06-24 |
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US11469167B2 (en) | 2022-10-11 |
JP7416868B2 (ja) | 2024-01-17 |
JP2022508408A (ja) | 2022-01-19 |
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CN113366633B (zh) | 2022-07-12 |
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