WO2005017999A1 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- WO2005017999A1 WO2005017999A1 PCT/JP2004/011806 JP2004011806W WO2005017999A1 WO 2005017999 A1 WO2005017999 A1 WO 2005017999A1 JP 2004011806 W JP2004011806 W JP 2004011806W WO 2005017999 A1 WO2005017999 A1 WO 2005017999A1
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- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/58—Structural electrical arrangements for semiconductor devices not otherwise provided for, e.g. in combination with batteries
- H01L23/62—Protection against overvoltage, e.g. fuses, shunts
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- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
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- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/065—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L27/00
- H01L25/0655—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L27/00 the devices being arranged next to each other
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- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/0401—Bonding areas specifically adapted for bump connectors, e.g. under bump metallisation [UBM]
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- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/04042—Bonding areas specifically adapted for wire connectors, e.g. wirebond pads
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- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16135—Disposition the bump connector connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
- H01L2224/16145—Disposition the bump connector connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being stacked
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- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
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- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73201—Location after the connecting process on the same surface
- H01L2224/73207—Bump and wire connectors
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- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/1517—Multilayer substrate
- H01L2924/15192—Resurf arrangement of the internal vias
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- H—ELECTRICITY
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- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/153—Connection portion
- H01L2924/1531—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface
- H01L2924/15311—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface being a ball array, e.g. BGA
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- H—ELECTRICITY
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/156—Material
- H01L2924/157—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/19—Details of hybrid assemblies other than the semiconductor or other solid state devices to be connected
- H01L2924/191—Disposition
- H01L2924/19101—Disposition of discrete passive components
- H01L2924/19107—Disposition of discrete passive components off-chip wires
Definitions
- the present invention relates to a semiconductor device and a method of manufacturing the same. More specifically, the present invention relates to a semiconductor device to which a so-called multi-chip module (MCM) technology is applied, in which a plurality of semiconductor chips are assembled as one electronic component, and a method of manufacturing the same.
- MCM multi-chip module
- a semiconductor device using MCM technology a plurality of semiconductor chips having the same or different functions are mounted on a supporting substrate, but an internal circuit in which respective functional elements are formed on each semiconductor chip ( Core part), an external connection circuit (so-called interface circuit) drawn from each internal circuit, and an electrode pad connected to the external connection circuit. Is provided. And each semiconductor chip is connected by the wiring provided between the electrode pads. Electrode pads are used not only for chip-to-chip connections but also for needle placement during functional testing.
- Such an MCM type semiconductor device achieves the same degree of high performance as a system LSI type semiconductor device in which the functions of a plurality of semiconductor chips are built into one semiconductor chip. This simplifies the design process and the wafer process, which is advantageous in terms of yield, manufacturing cost, and shortening of TAT (Turn Ardom and Timme).
- the signal line from the internal circuit is once drawn out to the external connection circuit and then provided on the other semiconductor chip. It is connected to the external connection circuit. For this reason, the decrease in reliability becomes a problem due to the power consumption by the external connection circuit and the increase in the amount of heat generation in the semiconductor device resulting from this. There is also a problem that the area of the external connection circuit is wasted.
- At least one of a plurality of semiconductor chips is made to have only a core portion.
- a technology for disconnecting the external connection circuit mounted for connection with the outside of the chip is provided, such as connecting the external unit with an external device or other chip. It has been proposed. This technology not only wastes chip area but also enables high-speed operation and low power consumption.
- connection between the core portion and an external device or another chip causes an external device (one semiconductor chip to the other
- an external device one semiconductor chip to the other
- connection wire bonding wire
- the charge used for the semiconductor chip flows into the signal line between the chips, and the element used for the circuit inside the chip. It has been found that there are cases in which the characteristics of the metal are degraded or destroyed (all together as electrostatic damage).
- the bumps are formed on the chip surface. It has also been found that the characteristics of the elements used in the internal circuit of the chip may be degraded or destroyed (collectively referred to as plasma damage) due to plasma damage.
- the semiconductor device electrically connects signal lines connecting internal circuits formed in each of a plurality of semiconductor chips.
- the first protection circuit is provided to prevent the semiconductor elements on the chip from being damaged in connection with the signal lines connecting the internal circuits, as well as being directly connected.
- the form of the completed semiconductor device is not limited to a form in which a plurality of semiconductor chips are arranged adjacent to each other on a plane on a common support substrate (an interconnector or a mother board). It may be the one in which semiconductor chips of the above are stacked (face-down mounting). In the latter case, one of the two is used as the other supporting substrate, and there is no need to prepare an interposer separately, and the cost for the interposer is low and the cost is low. Is realized.
- semiconductor elements in the internal circuit are prevented from being damaged due to electrical and direct connection between the internal circuit and the internal circuit on the other semiconductor chip.
- the internal circuits of the multiple semiconductor chips are functionally tested with the first protection circuit installed.
- the signal lines between the two internal circuits are electrically connected directly.
- bonding wire or bumps may be used as a connection method.
- an external connection circuit is formed in the part to be connected (target connection part) in the semiconductor chip
- at least a part of the external connection circuit in the connection target part is a signal line.
- the signal lines between the two internal circuits be electrically connected directly after electrical disconnection from the internal circuit side.
- this disconnection for example, there is a method of disconnecting only the signal wiring to the internal circuit using dry etching such as laser blow or RIE (reactiv e etch), or a connection target portion.
- a method of physically cutting and removing (separating) the semiconductor chip portion can be used. By doing this, it is possible to reduce the power consumption and prevent the problem of signal delay because the connection target portion does not use all or part of the external connection circuit.
- the first protection circuit provided on the signal line directly connecting between the two internal circuits is a connection portion with the other internal circuit on at least one of the plurality of semiconductor chips, preferably on both chips. It is preferable to place on the signal line between the minute and the internal circuit on the semiconductor chip.
- the external connection circuit when the external connection circuit is provided with a second protection circuit that protects the semiconductor element from damage when connected to an external device, the above first signal line directly connecting between the internal circuits is provided.
- a protection circuit In effect, the first and second protection circuits are provided separately. Since the first protection circuit aims to protect the damage when directly connecting the internal circuits of both chips, its protection ability is sufficient to achieve the purpose. It only needs to have a protective ability.
- a second protection circuit may be provided in the external connection circuit used for connection with an external device or a function test, etc., in order to protect the semiconductor element from damage at the time of connection, the second protection circuit The protection capability does not have to be the same as the protection capability of this second protection circuit.
- the first protection circuit directly connects the internal circuits of both chips. It is not necessary after the connection process, as it is intended to protect the damage caused by the connection. In addition, if this protection circuit is present on the signal line, the load placed on the signal line is not preferred.
- a protection circuit is functioned by using a switching circuit capable of turning on and off between input and output during the connection process. After the connection process is completed, the first protection circuit may be disconnected from the signal line by turning it off.
- this switching circuit can also be a load on the signal line, so when designing the device circuit, provide the switching circuit in consideration of the circuit configuration of the protection circuit and switching circuit and the load on these signal lines. It is desirable to determine whether or not
- the device by electrically connecting the internal circuits directly, power consumption is prevented and operation delay is prevented as compared with the case of connection through the external connection circuit.
- the device can be operated at high speed.
- a protection circuit is provided to protect the semiconductor elements on the chip from electrostatic damage and plasma damage when connecting the circuits. Therefore, when electrically connecting internal circuits directly or when forming a protruding electrode for connection, it is possible to protect the element from those damages, and to prevent the deterioration of the reliability and yield of the MCM device. be able to.
- all or part of the external connection circuit is separated from the internal circuit side for the purpose of downsizing, low power consumption, or high speed, and an MCM type semiconductor device mounted with a plurality of semiconductors can be manufactured.
- FIG. 1 is a plan view showing a first embodiment of a semiconductor device to which the present invention is applied.
- FIGS. 2A to 2C are diagrams for explaining a configuration example of the external connection circuit and a connection method between chip internal circuits in the inter-chip connection section. (Part 1 )
- FIGS. 3A to 3C are diagrams for explaining one configuration example of the external connection circuit and a connection method between chip internal circuits in the inter-chip connection portion. (Part 2)
- FIGS. 4A to 4C are views for explaining a method of manufacturing the semiconductor device 1 of the first embodiment.
- 5A to 5B are views for explaining a second embodiment of the semiconductor device to which the present invention is applied.
- FIGS. 6A to 6B are diagrams for explaining a third embodiment of a semiconductor device to which the present invention is applied. (Part 1 )
- Part 2 is a third embodiment of the semiconductor device to which the present invention is applied.
- FIG. 8 shows a fourth embodiment of the semiconductor device to which the present invention is applied.
- the same component is denoted by the same reference numeral, and the overlapping description will be omitted.
- the semiconductor device of the present embodiment is proposed by the present applicant in Japanese Patent Application Nos. 2 0 0 2-6 7 9 6 9 and 2 0 0 2-1 9 0 6 4
- the chip internal circuits formed on a plurality of semiconductor chips are electrically connected directly by employing a technology for separating the external connection circuits mounted for connection to the chip exterior.
- a protection circuit which is a specific configuration, is provided on a signal line which directly electrically connects between the aforementioned chip internal circuits. The details will be described below.
- FIG. 1 is a plan view showing a first embodiment of a semiconductor device to which the present invention is applied.
- the semiconductor device 1 shown in this figure is a so-called MCM type semiconductor device in which a plurality of substantially square semiconductor chips 20 and 22 (shown in FIG. 1) are mounted on a supporting substrate 10. It is.
- the first semiconductor chip 20 is, for example, a semiconductor chip for logic in which a gate circuit for signal processing is formed as the chip internal circuit 30.
- the second semiconductor chip 22 is a semiconductor chip for memory in which, for example, a 32-bit bus DRAM (Dynamic RAM) circuit is formed as an internal circuit 32 in the chip.
- DRAM Dynamic RAM
- the semiconductor chip 2 0, 2 2 is, for example, on the support substrate 10, It is die-bonded with the path formation surface facing upward. Then, an insulating film (not shown) is formed on the support substrate 10 in a state of covering the semiconductor chips 2 0 and 2 2.
- the semiconductor chips 20 and 22 are connected to a plurality of external connection circuits 40 and 42 drawn from the chip internal circuits 30 and 32 and to the external connection circuits 40 and 42, respectively.
- the electrode pads 50 and 52 are provided.
- the electrode pads 50, 52 are for carrying out a functional test of the semiconductor chips 20, 22.
- the electrode pads 50, 52 are formed along the outer periphery of each of the semiconductor chips 20, 22. Are arranged.
- the electrode pads 50, 52 are not provided in the inter-chip connection portion 1 1 between the semiconductor chips 20, 22.
- the connection points 3 0 a 3 2 a of the chip internal circuits 3 0 3 2 2 are connected without connecting the electrode pads 5 0 5 2 and the external connection circuits 4 0 4 2.
- 5 8 directly connect the semiconductor chips 20 and 22 with the connection wiring 1 2. Note that "without via electrode pad and external connection circuit” means "without passing through these members in terms of electrical signal".
- Wiring portions (not shown) between the internal circuits 30 and 32 are electrically separated by dry etching means such as, for example, laser blotting or RIE (reactive ion etching), It may be connected by connection wiring 1 2 at connection points 5 6 and 5 8 on the side of the chip internal circuit 30 and 32 in the vicinity of the portion.
- dry etching means such as, for example, laser blotting or RIE (reactive ion etching
- the external connection circuit 4 to be separated Switching circuit that can electrically turn on and off between 0 a (4 2 a) and chip internal circuit 3 0 (3 2), that is, can switch electrical connection and separation (separating circuit) May be provided.
- the circuit configuration of the control portion for the switching circuit may be, for example, a circuit configuration of a form made by an external signal, or the chip internal circuits 30 and 32 are connected by the connection wiring 12. At this time, this may be automatically detected to electrically disconnect the external connection circuit 40, 42 in the inter-chip connection portion 1 1 from the chip internal circuit 303.
- Connection wiring 12 directly connecting chip internal circuits 30 and 32 is, for example, disposed on the above-described insulating film by patterning, and connection areas 30 a and 32 formed in the insulating film. Connection points 56 and 58 in the part a are connected to the chip internal circuits 3 0 and 3 2 of the respective semiconductor chips 20 and 22 through connection holes not shown.
- connection areas 30a and 32a to which the connection wiring 12 is connected a part of the wiring (signal line) constituting the chip internal circuit 30 and 32 is formed in an electrode pad shape. Or the electrode By connecting the terminals, it is assumed that they have sufficient area for connection.
- connection area 3 0 a As a specific configuration related to the present invention, connection area 3 0 a,
- a protective member is provided to protect the semiconductor device (not shown) used in 2. This point will be described in detail later.
- FIGS. 2A to 2C and 3A to 3C show an example of the configuration of the external connection circuits 40 and 42 and the chip internal circuit in the interchip connection section 1 1.
- 32 are diagrams for explaining a connection method.
- FIGS. 2A and 3A show an example of a method according to an embodiment of the present invention
- FIG. 2B shows a patent application of Japanese Patent Application No. 2 0 0 2-6 7 9 6 9
- An example of the method in 2 0 0 2-1 9 1 0 6 4 is shown.
- FIGS. 2C and 3C show modified examples in the vicinity of the external connection circuits 40, 42 in the inter-chip connection portion 1 1.
- I / O input / output, I; Input, ;; Output
- an electrostatic protection circuit an example of a second protection circuit of the present invention
- Needle pads for chip testing are applied to the electrode pads 50 (52) connected to the lead-out wiring 16 via 4 0 (42).
- the power supply circuit 40 2 is provided for each of the external connection circuits 4 0 and 4 2 in the figure, the power supply circuit 4 0 2 is externally connected as described above. Instead of providing each path 40, 42, one power supply circuit 402 may be shared for a predetermined number of minutes or all of the external connection circuits 40, 42 minutes.
- each external connection circuit 40 (42) and electrode pad 50 (52) are a plurality of (in the drawing, drawing out the chip internal circuit 30 (32)).
- the configuration may be such that it is shared by the five internal wires 14 and transmitted to the electrode pad 50 (52) by one lead wire 16.
- the external connection circuit 4 0 (4 2) stores, for example, a signal from the chip internal circuit 3 0 (3 2), performs serial signal processing to send a signal to the outside of the chip, and reverse signal processing.
- the processing to restore the original signal is performed by an I / O circuit (not shown) in the external connection circuit 4 0 (4 2).
- each internal wiring 14 from the chip internal circuit 3 0 (32) side is the connection point 5 6 (58 of the previous stage of external connection circuit 4 0 (4 2) ) Is also connected to the connection point 5 8 (5 6) of the other semiconductor chip 20.
- the common electrode pad 50 (52) is used for needle testing for tip test.
- each internal wiring 1 4 from the chip internal circuit 3 0 (3 2) side is an external connection circuit.
- the connection point 5 6 (5 8) in the previous stage of the path 40 (4 2) is also connected to the connection point 5 8 (5 6) of the other semiconductor chip 20.
- the predetermined number of external connection circuits 4 0 (4 2) configured as described above are arranged on the edge of the square semiconductor chip 20, 22.
- the chip internal circuit 30 (32) side and the external connection circuit 40 (42) side are separated by the separation point SP 1 (SP; Electrically separate.
- the internal wiring 14 connecting the chip internal circuit 3 0 (3 2) side to the external connection circuit 4 0 (4 2) side is cut off at separation point SP 1, and this separation point SP 1
- the chip internal circuits 3 0 and 3 2 are connected electrically without passing through the electrode pads 5 0 and 5 2 and the external connection circuits 4 0 and 4 2. can do.
- the external connection circuit 40 (42) which is no longer required may be separated not only electrically but also physically, or may be left as it is. If it is physically left, it is recommended to use an isolation circuit to electrically disconnect it from the signal line.
- connection pad 5 9 Provide for 14 minutes of internal wiring in the vicinity of the target external connection circuit 4 0 a (4 2 a).
- This connection pad 59 may be fine enough to allow connection with the other chip internal circuit 32 (30), and it is an electrode pad used also for needle contact for functional inspection. It may be much smaller than 5 0 (5 2).
- each connection point 5 6 (5 8) corresponding to each internal wiring 14 is a separation boundary line.
- the lines are arranged substantially parallel to the semiconductor chip 20 on the side of the semiconductor chip 20 (not limited to one line but may be a plurality of lines several times apart). Connect internal wiring 1 4 and connection pad 5 9 with internal lead 12 a from connection point 5 6 (5 8).
- FIGS. 2A to 2C the cutting positions of the external connection circuit 40a, 42a and the electrode pads 50a, 52a to be cut off with respect to the chip internal circuit 30, 32 are shown in FIGS. 2A to 2C.
- FIGS. 3A and 3B between the separation point SP 1 of the circuit shown in the figure, that is, between the chip internal circuits 30 and 32 and the external connection circuits 40a and 42a.
- this is realized by providing a separation boundary on the separation point SP 1 which is also a position where the connection pad 5 9 is left on the chip internal circuit 30 0, 32 side. If this separation boundary is cut, the external connection circuit 40 a (42 a) and the electrode pad 50 a (52 a) are physically separated from the semiconductor chip 20 (22). .
- the input / output I / O circuit 400, the power supply circuit 402, or the electrostatic protection circuit 404 are each partially Parts) are separated from the semiconductor chips 20 and 22 and the semiconductor chips 20 and 22 mounted on the support substrate 10 are separated from each other without the external connection circuits 40 and 42.
- the chip internal circuits 30 and 32 of the semiconductor chip 20 and 22 are directly connected to each other.
- the circuit consumes a large amount of power as compared to a semiconductor device in which the chip internal circuits 30 and 32 of the semiconductor chip 20 and 22 are connected through the external connection circuits 40 and 42.
- the external connection circuits 40 and 42 By reducing the use of the external connection circuits 40 and 42, it is possible to reduce the power consumption of the external connection circuits 40 and 42.
- the reliability of the semiconductor device 1 can be improved.
- the external connection circuit 40 since the respective semiconductor chips 20 and 22 are electrically connected directly without passing through the external connection circuits 40 and 42 (for example, the IZO circuit 400), the external connection circuit 40 It is possible to prevent the operation delay due to the connection between the semiconductor chips 20 and 22 through 42, and to achieve high-speed operation of the semiconductor device 1.
- the semiconductor chips 20 and 22 are directly connected between the chip internal circuits 30 and 32 of the semiconductor chips 20 and 22 without interposing the external connection circuits 40 and 42. Needless to say, no extra external connection circuit is connected to this chip internal circuit 3 0, 3 2 part. Therefore, the flow of current to the extra external connection circuit can be prevented, the power consumption can be surely reduced, and the semiconductor chip area for leaving the extra external connection circuit can be reduced. The size of the semiconductor device can be reduced.
- the external connection circuits 40 and 42 are separated at the separation point SP 1 and the chip internal circuits 30 and 32 are connected to each other when connecting between chips.
- electrostatic breakdown may occur due to the charge that has been charged on the chip.
- the characteristics of the semiconductor elements (not shown) used for the chip internal circuits 3 0 and 3 2 may be degraded or destroyed.
- the electrostatic discharge at the time of connection between chips and the plasma damage at the time of forming bumps on the chip surface due to the charges charged in such chips the chip internal circuit 3 0 3 2
- a protective member for these problems is provided between the inter-chip connection portion 1 1 and the chip internal circuit 30, 32.
- a diode 4 0 6 is connected to the connection area 3 0 a (3 2 a) of the semiconductor chip 2 0 (2 2).
- a protection circuit (an example of the first protection circuit of the present invention) 4 0 6 is provided for the purpose of protecting electrostatic damage, which is composed of a, and the like.
- the protection circuit 4 0 6 is a signal line electrically connecting the chip internal circuits 3 0 3 2 of the semiconductor chips 2 0 2 2 directly (connection wiring 1 2, internal lead wire 1 2 a, It may be provided at any position on the internal wiring 1 4). However, as shown in FIG. 3B, in order to ensure protection of the semiconductor elements of the chip internal circuits 30 and 32, as shown in FIG. It is preferable to provide a protective circuit 4 0 6 on the internal wiring 1 4 between the connection pad 5 9 and the chip internal circuit 3 0 (3 2) or on the internal lead 1 2 a.
- One chip internal circuit 30 (32) is temporarily connected to the relay pad base via the relay base and the relay pad, and the relay pad base is connected to the other chip internal circuit 32 (30). It may be connected to In this case, the protective circuit 4 0 6 is disposed on the respective semiconductor chips 2 0 (2 2) in the same manner as described above, with the connection pads 5 9 and the chip internal circuits 3 0 (3 2). It is preferable to provide on the internal wiring 14 and the internal lead 12a between the two.
- the protection circuit 40 6 may be disposed on the relay pad base, although this is not a sufficient aspect. Yes. In such an embodiment, while using the common semiconductor chips 20 and 22, the protection circuit 40 6 having an appropriate protection capability is selected according to the difference in the state of electrostatic generation due to environmental conditions and the like. Have the advantage of being
- the resistance to static electricity of the semiconductor elements included in the chip internal circuits 3 0 3 2 on each of the semiconductor chips 2 0 2 2 2 is not limited to the same. Therefore, for example, the protection circuit 4 0 6 is It may be provided. In this case, since the resistance may be different for each signal line, the resistance may be weak for each signal line, that is, the semiconductor chip 20 side for a certain signal line and the semiconductor chip 2 for a certain signal line. On the side, the protection circuits 4 0 6 may be arranged separately.
- the protection circuit 4 0 6 is intended to protect element damage (particularly damage caused by static electricity in this case) when directly connecting the chip internal circuit 3 0 3 2 2 of both semiconductor chips 2 0 2 2. As it is connected, it is just enough protection to achieve its protection function It has the ability and the protection function should work.
- the protection ability of the protection circuit 4 0 6 is the electrostatic protection ability of the electrostatic protection circuit 4 0 4 provided in the external connection circuit 4 0 4 2 used for connection with an external device, a function inspection, etc. It may be different from
- the externally connected circuits 40, 42 to be compared here are the externally connected circuits 40a, 42a which are separated from the semiconductor chips 20, 22 of the chip-to-chip connection portion 1 1 It may be an external connection circuit 40, 42 provided at another edge.
- the protection circuit 4 0 6 is unnecessary after the completion of the connection process. Also, if there is a protection circuit 4 0 6 on the signal line (in the previous example, the internal wiring 1 4 or the internal lead 1 2 a), the protection circuit 4 0 6 is used for the chip internal circuits 3 0 3 2. It is better not to do this as it will be a load placed on the signal line. Therefore, after the connection process between chip internal circuits 30 and 32 is completed, it is recommended to electrically disconnect protection circuit 40 6 from the signal line. For example, in the connection configuration shown in FIG. 2A, the internal wiring 14 and the diode 4 0 6 a are separated at separation points SP 2 and SP 3 using dry etching such as, eg, laser deposition or RIE. It is better to separate the
- the external connection is achieved. After disconnecting the circuits 4 0 and 4 2, they are directly connected by the connection wiring 1 2. Even if they are connected, the internal elements can be protected from electrostatic breakdown when the chip is connected. As a result, chip internal circuits 30 and 32 having element characteristics equivalent to those before the external connection circuits 40 and 42 are separated can be obtained. Therefore, it is possible to improve the reliability and yield of MCM devices with low power consumption and high-speed operability.
- FIGS. 4A to 4C are views for explaining a method of manufacturing the semiconductor device 1 of the first embodiment.
- semiconductor chips 1 20 and 1 2 2 are fabricated. These semiconductor chips 120 and 122 are the predecessors of the semiconductor chips 20 and 22 described with reference to FIG. 1.
- the chip internal circuits 30 and 32 and the external connection circuits 40 and 42 In addition, electrode pads 50 and 52 are provided, respectively.
- the number of external connection circuits 40, 42 necessary and sufficient for the functional inspection of the chip internal circuits 30, 32 are drawn out from the chip internal circuits 30, 32 in all directions. There is. Therefore, the number of externally connected circuits 40, 42 of the semiconductor chips 120, 122 and the number of electrode pads 50, 52 are the semiconductor chips described with reference to FIG.
- the external connection circuits 40a and 42a and the electrode pads 50a and 52a are portions to be physically cut and removed in a later step.
- the external connection circuits 40 and 42 drawn from the chip internal circuits 30 and 32 chips from which external connection circuits 40 a and 42 a of portions to be cut and removed in a later step are extracted. It is assumed that electrode pads (corresponding to connection pads 5 9 in FIGS. 3A to 3C), which are not shown, are formed in the internal circuits 30 and 32. This electrode pad can be connected to other chips in a later process. It may be fine.
- connection signal lines between the chip internal circuits 30 and 32 on the semiconductor chips 120 and 122 connected to the electrode pads are provided on the internal wiring 14 and the internal lead wires 12a shown in FIGS. Shall be
- each of such semiconductor chips 120 and 122 the electrode pads 50 and 52 which can also be used for inspection are needled, and the functional test of the chip internal circuits 30 and 32 is performed. Do. At this time, each of the semiconductor chips 1 20 and 1 2 2 functions in a wafer state provided with a plurality of semiconductor chips 1 20 and a wafer state provided with a plurality of semiconductor chips 1 2 2 It is preferable to conduct an inspection.
- each of the individual semiconductor chips 1 20 and 1 2 2 formed on each wafer is a non-defective product, and then each wafer is ground from the back surface side to make each semiconductor chip 1 2 Divide into 0, 1 2 2 and pick up only those judged to be non-defective based on the result of this functional test.
- FIG. 4B a part of the external connection circuits 40 a 42 a and the electrode pads 50 a in each of the semiconductor chips 120 and 122 are shown. , 5 2 a are divided into each chip from the wafer state, and are simultaneously cut and removed by dicing (cut off) to obtain the semiconductor chips 1 20 and 1 2 2 using FIG. It is molded into the state of the semiconductor chip 2 0, 2 2 of the described configuration.
- Chips in the form of semiconductor chips 20, 22 are used.
- the external connection circuits 40a and 42a and the electrode pads 50a and 52a to be removed here are external connection circuits 40 and 50 provided at the connection portions with other semiconductor chips in the next step. 4 2 and electrode pads 5 0, 5 2.
- the cutting position of the external connection circuit 40a, 42a and electrode pad 50a, 52a with respect to the chip internal circuit 30, 32 is the same as in FIG. 3A where the connection pad 5 9 is left. To the boundary of the separation shown in Fig. 3C.
- the semiconductor chips 1 20 and 1 2 2 are bonded on the support substrate 10. At this time, it is preferable to use a layout in which connection portions of the respective semiconductor chips 1 20 and 12 2 are disposed in proximity to each other.
- an insulating film is formed on the supporting substrate 10 in a state of covering the respective semiconductor chips 120 and 122, and further, the semiconductor chips 120 and 210 are formed on the insulating film.
- Form connection holes that reach the connection pads provided in the chip internal circuits 3 0, 3 2 of 1 2 2.
- the input / output is connected to make the protection circuit 4 0 6 function, and the chip internal circuits 3 0 3 2 of each semiconductor chip 1 20 2 1 12 2 are directly connected through this connection hole.
- the semiconductor device 1 shown in FIG. 1 is obtained by patterning the wiring on the insulating film. For example, in the circuit of the configuration described with reference to FIGS.
- connection holes reaching connection pad 5 9 are formed, and connection pads in each of semiconductor chips 1 20 and 1 2 2 are formed. Connect between 5 and 9 with connection wiring 1 2. Then, after connecting the chip internal circuits 3 0 3 2, for example, using a dry etching method such as laser blow or RIE, Disconnect unnecessary protection circuit 4 0 6 from the signal line.
- a dry etching method such as laser blow or RIE
- the protection circuit 4 0 6 does not become a load on the chip internal circuits 3 0 3 2 during normal use. It is possible to prevent the decrease in operating speed due to the provision of the protection circuit 4 0 6.
- the semiconductor device 1 in which the chip internal circuits 30 and 32 of the semiconductor chips 120 and 122 are connected without causing the problem of electrostatic damage in the connection pad 59, that is, reduction of power consumption and operation speed As well as being able to improve, it is possible to obtain a highly reliable semiconductor device.
- the protection circuit 4 0 6 is separated from the signal line, but in the manufacturing process, the chip-to-chip connection 1 1 If the external connection circuits 40 a and 4 2 a of the part are to be left physically separated, the external connection circuits 4 0 a and 4 2 a can be electrically connected from the chip internal circuit 3 0, 3 2 side.
- a separate circuit may be provided to separate them (see Japanese Patent Application No. 2 0 0 2-6 7 9 6 9 by the applicant).
- the external connection circuits 40 a and 42 a are shared by a plurality of internal wirings 14 as described with reference to FIG. 2C. Is also applicable.
- a separation circuit is provided between the internal circuit including the connection pad 5 9 shown in FIG. 3C and the external connection circuits 40 a and 42 a.
- FIGS. 3A to 3C are views for explaining a second embodiment of the semiconductor device to which the present invention is applied.
- the semiconductor device 1 of the second embodiment uses a switching circuit capable of turning on and off between the input and output, and a protection circuit 4 from a signal line directly connecting the chip internal circuits 3 0 and 3 2. It is characterized in that 0 6 is configured to be detachable.
- the semiconductor chips 2 0 and 2 2 are different only in that they have switching circuits, and the plan view of the semiconductor device 1 is basically considered to be the same as that shown in FIG. Good.
- a switching circuit 4 0 8 capable of turning on and off between the input and output is provided.
- This switching circuit 4 0 8 is, for example, the signal line (in the figure, the internal wiring 1 4 or the internal lead 1 2 a) and the protection circuit 4 0 6 to which the connection pad 5 9 is connected by the external signal CNT. It is provided as a switch for switching the connection state of, and may be, for example, a simple analog switch type.
- a switching circuit 4 0 8 is such that the external connection circuits 4 0 a and 4 2 a are shared by a plurality of internal wires 14 as described with reference to FIG. 2C. Is also applicable.
- a switching circuit 4 0 8 is provided between the internal circuit including the connection pad 5 9 shown in FIG. 3C and the protection circuit 4 0 6.
- the switching circuit 40 8 directly connects the chip internal circuits 3 0 and 3 2 with the signal lines and the protection circuit 4 0 6. There is an electrical disconnection between them. Therefore, when the protection circuit 4 0 6 is required as in the case of connection between the chip internal circuits 3 0 3 2, turn on the switching circuit 4 0 8 to connect the input / output By doing this, the protection circuit 4 0 6 can be connected on the signal line to be connected (that is, protected).
- the switching circuit 4 0 8 is turned off to disconnect between its input and output.
- Disconnect protection circuit 4 0 6 from the signal line of connection target (ie protection target). This prevents unnecessary load from being applied to the chip internal circuits 30 and 32. It is possible to achieve high-speed operation.
- FIGS. 6A to 6B and 7A to 7B are diagrams for explaining a third embodiment of a semiconductor device to which the present invention is applied.
- FIG. 6A is a plan view showing the third embodiment
- FIG. 6B is a sectional view taken along the line A-A in this plan view
- FIGS. 7A to 7B are views showing the details of the cross section along line A-A in the plan view of FIG. 6A.
- the semiconductor device 1 of the third embodiment is characterized in that the semiconductor chips 20 and 22 are face-down mounted using bumps.
- the other configuration is substantially the same as the configuration of the first or second embodiment, and the protection circuit is provided on the signal line directly connecting the chip internal circuits 30 and 32 of the inter-chip connection portion 1 1. 06 is provided.
- this protection circuit 406 has the purpose of protecting the semiconductor element from electrostatic damage at the time of direct connection between the chip internal circuits 30 and 32 as well as the first and second embodiments. It is also used to protect semiconductor elements from plasma damage when forming bump electrodes (bumps) used for face-down mounting in place.
- the semiconductor chips 20 and 22 are face-down mounted on a support substrate (here, interposer) 10 via the bump electrodes 51 which are an example of bumps.
- the support substrate 10 is formed, for example, by forming the wiring 73 on the silicon substrate 71 at high density via the insulating film 72.
- a part of the wiring 73 is formed in an electrode pad shape, and only the electrode pad 7 3 c, 7 3 d portion is exposed, and the other wiring 7 3 is covered with the insulating film 74.
- the electrode pads 7 3 c are electrode pads for connecting the semiconductor chips 20 2 and 2 2 to the support substrate 10.
- the electrode pad 7 3 d is an electrode pad for connecting the support substrate 10 to an external device, and is disposed, for example, at the periphery of the support substrate 10.
- the connection between the semiconductor chips 20 and 22 is made by the bump electrode 51 and the wiring 73 of the support substrate 10 connected to the projecting electrode 51.
- the bump electrode 5 1 is a part of the wiring constituting the chip internal circuit 3 0 3 2 of each semiconductor chip 2 0 2 2 2, for example, a part of the uppermost layer of a multilayer wiring as shown in FIG. And a connecting pad 5 9 shown in FIGS. 3A to 3C, and an electrode pad 7 3 c of the support substrate 10.
- the chip internal circuits 30 and 32 in each of the semiconductor chips 20 and 22 are directly connected without the intervention of external connection circuits 40 and 42 including I / O circuits and the like.
- electrode pads 50 and 52 provided on the semiconductor chips 20 and 22 are also formed on the supporting substrate 10 side in order to connect the semiconductor chips 20 and 22 with external devices. It is connected to the electrode pad 7 3 of the wiring 7 3 via the bump electrode 5 1.
- the wire 7 3 to which the electrode pads 50 and 52 are connected is drawn out to the peripheral edge of the support substrate 10, and an external electrode pad 7 3 for connecting the drawn-out wiring portion to the outside. d is provided.
- the electrode pads 50, 52 are connected to the internal circuits 30, 32 of the semiconductor chip 20, 22 via the external connection circuits 40, 42, whereby the semiconductor chip The internal circuit 30 0, 32 of the chip 2 0 2, and the external electrode pad 7 3 d of the support substrate 10 are connected via the external connection circuit 40, 4 2.
- the semiconductor device 1 of the third embodiment can be connected to an external device by connecting the bonding wire 73 e to the external electrode pad 73 d.
- the external electrode pads 7 3 d are also used to test multi-chip semiconductor devices.
- a plug 77 made of a conductive material is embedded in the external substrate connection hole 76, and the surface of the plug 77 (surface on the silicon substrate 71 side) is used to connect this semiconductor device to an external device.
- the bump electrode 7 8 is provided.
- the bump electrode 78 is also used to test a multi-chip semiconductor device. Further, the surface of the external electrode pad 73 d may be exposed from the insulating film 74 as shown in the drawing, or may be covered with the insulating film 74.
- the manufacturing method of the semiconductor device 1 of the third embodiment is as follows. First, as in the first embodiment, each semiconductor chip in which an internal circuit, an external connection circuit, and a connection pad are respectively formed. Are prepared on the surface of the wafer as the predecessors of the semiconductor chips 20 and 22 in FIGS. 6A to 6B, and each of the semiconductor chips is needled to each connection pad for each internal circuit. Perform functional inspection. Thereafter, the wafer is transferred to the respective semiconductor chips 20, 22 shown in FIGS. 6A to 6B. Divide and pick up only those that are judged to be non-defective products by functional inspection. In addition, connection signal lines between the chip internal circuits 30 and 32 on the semiconductor chip 20 and 22 connected to the portion where the bump electrode 51 will be formed later (FIG. 2A and FIG. 3A) The protective circuit shown in FIGS. 2A and 3A to 3C is provided on the internal wiring 14 and the internal lead wire 12a shown in FIG. 3C. It is assumed that
- a bump electrode 5 1 is formed on a portion of the chip internal circuit 30 or 32 which is a connection portion with the semiconductor chip on the chip 52 and the other.
- the formation of the bump electrodes 5 1 may be performed in the wafer state before the semiconductor chips 20 and 22 are divided.
- the formation of the bump electrode 5 1 may be on the side of the support substrate 10 instead of the side of the semiconductor chips 20 and 22. Alternatively, it may be formed on both of the semiconductor chips 20 and 22 and the support substrate 10.
- the state in which the protection circuit 4 0 6 is provided on the signal line means the state in which the protection circuit 4 0 6 is made to function, and the semiconductor chip 2 0 6 2 has a signal line and a protection circuit 4 When a switching circuit 4 0 8 is provided between 0 6 and 6 6, its input and output are connected. The same is true below.
- 3 2 Mount the semiconductor chips 2 0 and 2 2 with the formation surfaces facing each other. At this time, the chip internal circuits 3 0 and 3 2 of the semiconductor chips 2 0 and 2 2 are directly connected via the wiring 7 3 of the support substrate 1 0 and the bump electrodes 5 1. By this, Complete semiconductor device 1
- the chip internal circuits 3 0 3 2 of the semiconductor chips 20 2 2 2 can be obtained by the wiring 7 3 on the supporting substrate 10 side.
- the semiconductor chips 20 and 22 are sufficiently reliable by the function test, the power consumption is reduced. And a semiconductor device capable of improving the high-speed operation.
- the protection circuit 460 is provided on the signal line on which the bump electrode 51, which is an example of a bump, is formed, the bump (in this example, the bump electrode 51) is used as a chip. Even if the plasma current at the time of formation on the surface flows into the signal line to be formed of the bump electrode 51, it can be absorbed by the protection circuit 406, so that the plasma current makes it possible to Can be prevented from being degraded or destroyed.
- the protective circuit 4 0 6 provided on the signal line, the bump electrode 5 1 and the wiring 7 3 of the support substrate 10 are connected to each other to connect the chip internal circuit 30 of the semiconductor chip 2 0 or 2 2. Since electrical connection is established between 32 directly, even if the electric charge on the semiconductor chip 20 2 or 2 2 flows into the signal line to be connected, it can be absorbed by the protection circuit 4 0 6. Therefore, it is possible to prevent static electricity from degrading or destroying the characteristics of elements used in the circuit inside the chip.
- the protection circuit 4 0 6 of the chip internal circuits 3 0 3 2 can be used during normal use. Load and It will never be. As a result, unnecessary load can be prevented from being applied to the chip internal circuit 303, and high speed operation can be achieved.
- the semiconductor device 1 of the third embodiment when the silicon substrate 7 1 is used as the support substrate 10, high density wiring 7 3 can be formed on the support substrate 10 side, and the semiconductor chip 2 can be formed. It is possible to connect between 0 and 22 with the shortest distance. Therefore, it is possible to prevent further signal delay and speed up. Furthermore, when both of the support substrate 10 and the semiconductor chips 20 and 22 are silicon substrates, their expansion coefficients are equal, so the junctions due to the heat stress (protrusion electrode) It is possible to prevent the disconnection of 5). Further, by using a silicon substrate having a thermal conductivity higher than that of the organic substrate as the support substrate 10, the semiconductor chips 20 and 22 generate heat when the chip internal circuits 30 and 32 are driven. However, since this heat can be dissipated more quickly, it is possible to prevent malfunction due to heat generation.
- FIG. 8 is a cross-sectional view showing a fourth embodiment of the semiconductor device to which the present invention is applied.
- the semiconductor device 1 of the fourth embodiment is characterized in that the semiconductor chips 20 and 22 are face-down mounted to each other.
- the other configuration is the same as the configuration of the first or second embodiment, and the protection circuit is provided on the signal line directly connecting the chip internal circuits 30 and 32 of the inter-chip connection portion 1 1. 06 is provided.
- This protection circuit 46 has the same purpose as that of the third embodiment, and in addition to the purpose of protecting the semiconductor element from electrostatic damage when the chip internal circuits 3 0 and 3 2 are directly connected, Face-down implementation It is also used for the purpose of protecting semiconductor elements from plasma damage when forming the bump electrodes (bumps) used for the purpose.
- the semiconductor chip 20 is a support substrate for the semiconductor chip 2 2
- the semiconductor chip 22 is a support substrate for the semiconductor chip 20. Is mounted face down through the bump electrode 5 1.
- the semiconductor chip 20 is, for example, constituted only by the chip internal circuit 30.
- the chip internal circuit 30 portion connected to the bump electrode 5 1 is a part of the wiring 8 1 constituting the chip internal circuit 3 0 It is assumed that (for example, a part of the uppermost layer in the illustrated multilayer wiring) is formed in an electrode pad shape, thereby having a sufficient area for connection.
- the semiconductor chip 22 includes a chip internal circuit 32, a plurality of external connection circuits 42 drawn from the internal circuit, and electrode pads connected to the respective external connection circuits 4 2.
- a part of the wiring 9 1 (for example, a part of the uppermost layer in the illustrated multilayer wiring) constituting the chip internal circuit 3 2 is formed in an electrode pad shape, and in this part, the bump electrode 5 1
- An electrode pad 92 connected to each external connection circuit 4 2 is for connecting the semiconductor device on which the semiconductor chips 20 and 22 are mounted to an external device.
- the semiconductor chip 2 It is arranged on the outer circumference side of 2.
- a part of the interconnections 8 1 and 9 1 constituting the chip internal circuit 3 0 3 2 of each semiconductor chip 2 0 2 2 (for example, as shown in the drawing) Interposing the bump electrode 5 1 between the parts formed by forming a part of the top layer of the As a result, the chip internal circuits 3 0 3 2 of the semiconductor chips 2 0 2 2 2 are directly connected to each other without the use of an external connection circuit including an I 0 circuit or the like.
- the method of manufacturing the semiconductor device 1 according to the fourth embodiment is as follows. First, as in the first embodiment, each semiconductor chip on which an internal circuit, an external connection circuit, and an electrode pad are formed is provided. 8 is fabricated on the wafer surface as a precursor of the semiconductor chips 20 and 22 in FIG. 8, and each of the semiconductor chips is needled to each electrode pad to perform a functional test of each internal circuit. Thereafter, the wafer is divided into the respective semiconductor chips 20 and 22 shown in FIG. 8, and only those which are judged as non-defective products in the functional inspection are picked up.
- the necessary parts of the semiconductor chips formed on the wafer surface are left, and the other parts are cut and removed.
- the semiconductor chip to be the precursor of the semiconductor chip 20 the external connection circuit and the electrode pad are cut and removed to obtain the semiconductor chip 20 consisting only of the chip internal circuit 30.
- the semiconductor chip that is the precursor of the semiconductor chip 22 the chip internal circuit 32 and the necessary external connection circuit 42 and the electrode pad 92 connected to this are cut off and removed except for other parts.
- a semiconductor chip 2 2 is obtained.
- the semiconductor chips 20 and 22 may be laid out in such a manner that the electrode pads and the external connection circuit are not provided on one side of the chip previously connected to the internal connection circuit so that disconnection is not necessary. Use a chip that has been
- the chip The bump electrode 5 1 is formed on the portion of the wiring forming the internal circuit 3 0 (or chip internal circuit 3 2) in the form of an electrode pad.
- the bump electrodes 5 1 may be formed in a wafer state before the semiconductor chips 2 0 and 2 2 are divided. .
- the semiconductor chip 2 0 and the semiconductor chip 2 2 are disposed with the surface on which the chip internal circuit 3 0 3 2 is formed facing each other,
- the semiconductor chip 2 0 is mounted on the semiconductor chip 2 2 through 5 1.
- the chip internal circuits 30 and 32 of the semiconductor chips 20 and 22 are directly connected via the protruding electrodes 51.
- the semiconductor device 1 is completed.
- an external connection circuit including an I / O circuit and the like is provided between the chip internal circuits 30 and 32 of the semiconductor chips 20 and 22. Since the semiconductor chips 20, 22 are directly connected without any intervention, the semiconductor chips 20, 22 whose reliability is sufficiently ensured by the function inspection are reduced, as in the first to third embodiments described above. And a semiconductor device capable of improving the high-speed operation.
- the semiconductor chip 20 (or the semiconductor chip 22) is used as a support substrate, a so-called inverter is not required. It is possible to realize a low-cost MCM that does not require any additional cost.
- the protection circuit 4 0 6 is provided on the signal line on which the bump electrode 51, which is an example of the bump, is formed, the bump (in this example, the bump electrode 5 1) is When the plasma current is formed on the surface, it flows into the signal line of Also, since it can be absorbed by the protective circuit 4 0 6, it is possible to prevent the characteristic of the element used for the circuit in the chip from being degraded or destroyed by the plasma current.
- the semiconductor chip 2 0 is mounted on the semiconductor chip 2 2 via the protruding electrode 5 1, whereby the chips of the semiconductor chips 2 0 and 2 2 are provided. Since the internal circuits 30 and 32 are electrically connected directly, the semiconductor chip 2 0
- the protection circuit 4 0 6 is disconnected from the signal line, so that the protection circuit 4 0 6 is connected to the chip internal circuits 3 0 and 3 2 in normal use. It will not be a burden. This eliminates unnecessary load on the chip internal circuit 30
- the configuration in which one semiconductor chip 2 0 is disposed opposite to one semiconductor chip 2 2 is exemplified.
- the present invention is not limited to this.
- a configuration in which a plurality of semiconductor chips 20 are mounted on a semiconductor chip 2 2 as a supporting substrate, or the reverse configuration may be adopted, and a plurality of semiconductor chips mounted on one semiconductor chip are different.
- a function or an internal circuit with the same function may be provided.
- the semiconductor device of the present invention it is possible to directly connect the semiconductor chips in the circuit portion inside the chip. This makes it possible to prevent power consumption in the external connection circuit and to prevent an operation delay between semiconductor chips through the external connection circuit, thereby achieving high-speed operation and low operation in the MCM type semiconductor device. It becomes possible to achieve power consumption.
- the protection circuit can be prevented from being added with the chip internal circuit by disconnecting the input / output of the switching circuit, thereby achieving high-speed operation.
- a process of forming a bump on a connection target portion may be provided in a state where a protective circuit is provided on a signal line directly connecting between chip internal circuits.
- a process of forming a bump on a connection target portion may be provided.
- the protection circuit can be electrically connected from the signal line using dry etching such as laser blow or RIE after device fabrication is complete. Separation of the protection circuit It is possible to avoid the addition of the chip internal circuit and thereby achieve high-speed operation.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/567,163 US20070262465A1 (en) | 2003-08-19 | 2004-08-11 | Semiconductor Device and Method of Fabricating the Same |
EP04771767A EP1657746A4 (en) | 2003-08-19 | 2004-08-11 | SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING THE SAME |
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JP2003-294936 | 2003-08-19 | ||
JP2003294936A JP4264640B2 (ja) | 2003-08-19 | 2003-08-19 | 半導体装置の製造方法 |
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CN (1) | CN100524704C (ja) |
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KR101003116B1 (ko) | 2008-08-08 | 2010-12-21 | 주식회사 하이닉스반도체 | 패드를 제어하는 반도체 메모리 장치 및 그 장치가 장착된 멀티칩 패키지 |
US8097956B2 (en) | 2009-03-12 | 2012-01-17 | Apple Inc. | Flexible packaging for chip-on-chip and package-on-package technologies |
CN102184268A (zh) * | 2010-10-13 | 2011-09-14 | 天津蓝海微科技有限公司 | 防静电放电和防闩锁效应保护电路规则的自动检查方法 |
CN109906507B (zh) * | 2016-10-26 | 2023-09-05 | 硅工厂股份有限公司 | 多芯片结构的半导体器件及使用其的半导体模块 |
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US6586266B1 (en) * | 1999-03-01 | 2003-07-01 | Megic Corporation | High performance sub-system design and assembly |
US6141245A (en) * | 1999-04-30 | 2000-10-31 | International Business Machines Corporation | Impedance control using fuses |
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-
2003
- 2003-08-19 JP JP2003294936A patent/JP4264640B2/ja not_active Expired - Fee Related
-
2004
- 2004-08-11 US US10/567,163 patent/US20070262465A1/en not_active Abandoned
- 2004-08-11 KR KR1020067001643A patent/KR20060052876A/ko not_active Application Discontinuation
- 2004-08-11 EP EP04771767A patent/EP1657746A4/en not_active Withdrawn
- 2004-08-11 CN CNB2004800236413A patent/CN100524704C/zh not_active Expired - Fee Related
- 2004-08-11 WO PCT/JP2004/011806 patent/WO2005017999A1/ja active Application Filing
- 2004-08-19 TW TW093124977A patent/TWI260759B/zh not_active IP Right Cessation
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Title |
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See also references of EP1657746A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN1836326A (zh) | 2006-09-20 |
US20070262465A1 (en) | 2007-11-15 |
EP1657746A1 (en) | 2006-05-17 |
TWI260759B (en) | 2006-08-21 |
EP1657746A4 (en) | 2010-06-16 |
JP4264640B2 (ja) | 2009-05-20 |
TW200522327A (en) | 2005-07-01 |
JP2005064355A (ja) | 2005-03-10 |
KR20060052876A (ko) | 2006-05-19 |
CN100524704C (zh) | 2009-08-05 |
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