Patent Publication Number: US-2019198448-A1

Title: Anisotropically conductive elastic adhesive films in semiconductor device packages and methods of assembling same

Description:
FIELD 
     This disclosure relates to anisotropically conductive elastic adhesive films that assist in assembly of semiconductor device packages. 
     BACKGROUND 
     Semiconductive device miniaturization during packaging includes challenges to locate several semiconductive devices as well as passive devices in close proximity and to occupy a small overall footprint. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Disclosed embodiments are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings where like reference numerals may refer to similar elements, in which: 
         FIG. 1A  is a cross-section elevation of an anisotropically conductive flexible film that includes a plurality of electrically conductive channels according to an embodiment; 
         FIG. 1B  is a cross-section elevation of the anisotropically conductive flexible film depicted in  FIG. 1A  as applied to a semiconductor device package according to an embodiment; 
         FIG. 2A  is a cross-section elevation of a flexible film that includes a dispersion of electrically conductive particles according to an embodiment; 
         FIG. 2B  is a cross-section elevation of a semiconductor device package that includes the flexible film depicted in  FIG. 2A  according to an embodiment; 
         FIG. 3  is a cross-section elevation of a semiconductor device package that includes an anisotropically conductive flexible film with anisotropic electrical and heat conductivities according to an embodiment; 
         FIG. 3A  is a cross-section elevation of a portion of the semiconductor device package depicted in  FIG. 3  during assembly according to an embodiment; 
         FIG. 4  is a cross-section elevation of a semiconductor device package that includes an anisotropically conductive flexible film with anisotropic electrical and heat conductivities according to an embodiment; 
         FIG. 5  is a cross-section elevation of a semiconductor device package that includes an anisotropically conductive flexible film with anisotropic electrical and heat conductivities according to an embodiment; 
         FIG. 6  is a cross-section elevation of a semiconductor device package that includes an anisotropically conductive flexible film with anisotropic electrical and heat conductivities according to an embodiment; 
         FIG. 7  is a cross-section elevation of a semiconductor devise package on-package that includes anisotropically conductive flexible films with anisotropic electrical and heat conductivities according to an embodiment; 
         FIG. 8  is a cross-section elevation of a semiconductor device package that includes a flexible film with anisotropic electrical and heat conductivities according to an embodiment; 
         FIG. 9  is a cross-section elevation of a semiconductor device package that includes an anisotropically conductive flexible film that couples with a ribbon interconnect according to an embodiment; 
         FIG. 10  is a process flow diagram for assembling a semiconductor device package according to several embodiments; and 
         FIG. 11  is included to show an example of a higher-level device application for the disclosed embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     Elastic heat-transfer films include anisotropic electrical conductivity corridors that function for heat transfer channels as well as possibly for signal- and power/ground channels. The anisotropically conductive flexible films are installed where head space may have been found, but electrical and heat-conduction connections are established between respective other devices and heat sinks. 
       FIG. 1A  is a cross-section elevation  101  of an anisotropically conductive flexible film  110  that includes a plurality of electrically conductive channels  112  according to an embodiment. The anisotropically conductive flexible film  110  includes an elastic body  110  and a plurality of electrically conductive channels, one instance of which is indicated with reference numeral  112 . In an embodiment, the elastic body  110  is made from a silicone polymer that allows for flexibility, compressibility, but it retains sufficient structural cohesion that the several electrically conductive channels  112  do not short into each other during compression. 
     In an embodiment, the several conductive channels  112  are made from electronics-grade copper (Cu) and consequently, the conductive channels  112  provide useful anisotropic heat and electrical conductivity where the anisotropically conductive flexible film  101  is applied to convey excess heat away from an electronic semiconductive device. 
       FIG. 1B  is a cross-section elevation of the anisotropically conductive flexible film  110  depicted in  FIG. 1A  as applied to a semiconductor device package  102  according to an embodiment. The anisotropically conductive flexible film  110  is under focused compression from a first semiconductive device  116  and a subsequent semiconductive device  120 . Focused compression regions create a flexible film with anisotropic electrical conductivity, and focused compression is provided between bond pads  118  and  122 , and between bond pads  118 ′ and  122 ′, such that electrical connections are made between the first semiconductive device  116  and the subsequent semiconductive device  120 . 
     A region in the anisotropically conductive flexible film that is between adjacent bond pads  118  and  118 ′ and between adjacent bond pads  122  and  122 ′, however, has no electrical connection between the first semiconductive device  116  and the subsequent semiconductive device  120 . Accordingly, a given compressive embodiment of the anisotropically conductive flexible film  110  is useful for anisotropic electrical conductivity. 
     As illustrated in  FIG. 1A , the anisotropically conductive flexible film  110  has a rest thickness  114  (measured in the Z-direction), and as illustrated in  FIG. 1B , the anisotropically conductive flexible film  110  has a compressed thickness  115  that is less than the rest thickness  114 , where electrical interconnections are made between the two devices  116  and  120 . As configured, the anisotropically conductive flexible film  110  is a conductive and electronically connective bridge  110  between a bottom semiconductive device  116  and a top semiconductive device  120 . 
       FIG. 2A  is a cross-section elevation  201  of a flexible film  210  that includes a dispersion of electrically conductive particles  212  according to an embodiment. The flexible film  210  includes an elastic body  210  and a dispersion of electrically conductive particles, one instance of which is indicated with reference numeral  212 . In an embodiment, the elastic body  210  is made from a silicone polymer that allows for flexibility such as compressibility, but it retains sufficient structural cohesion that the dispersion of electrically, conductive particles  212  do not laterally short into each other during e.g. compression, but under useful compression, sufficient inter-particle electrical contact is made to create an electrically conductive channel. 
     In an embodiment, the dispersion of electrically conductive particles  212  is made from electronics-grade copper (Cu) particles, and consequently the dispersion  212  provides useful heat conductivity where the anisotropically conductive flexible film  210  is applied to convey excess heat away from an electronic semiconductive device. 
       FIG. 2B  is a cross-section elevation of a semiconductor device package  202  that includes the flexible film  210  depicted in  FIG. 2A  according to an embodiment. The flexible film  210  is under compression from a first semiconductive device  216  and a subsequent semiconductive device  220 . Focused compression is provided between bond pads  218  and  222 , and between bond pads  218 ′ and  222 ′, such that virtual anisotropic interconnects  213  are formed where regional dispersions of electrically conductive particles are sufficiently compressed. The virtual anisotropic interconnects are present, one of which is depicted with reference numeral  213 . The focused compression regions create an anisotropically conductive flexible film  210  with anisotropic electrical conductivity. A region in the anisotropically conductive flexible film that is between adjacent bond pads  218  and  218 ′, and adjacent bond pads  222  and  222 ′, has no electrical connection among the uncompressed dispersion of electrically conductive particles  212 , because compression of the anisotropically conductive flexible film  210 , if any in this region, does not created an anisotropic virtual interconnect. No connectivity is achieved in these regions, between the first semiconductive device  116  and the subsequent semiconductive device  120 . No electrical connection between the first semiconductive device  216  and the subsequent semiconductive device  220  is made, because the dispersion of electrically conductive particles  212  remains expanded and isolated in the matrix of the anisotropically conductive flexible film  210 . Accordingly, a given compressive variation of the anisotropically conductive flexible film  210  is useful. 
     As illustrated in  FIG. 2A , the anisotropically conductive flexible film  210  has a rest thickness  214 , and as illustrated in  FIG. 2B , the anisotropically conductive flexible film  210  has a compressed thickness  215  that is less than the rest thickness  214 . 
     Hereinafter, embodiments with anisotropically conductive flexible films, may use embodiments depicted in either of  FIGS. 1B and 2B , but reference is made to an anisotropically conductive flexible film, that may also be virtually, anisotropically conductive. 
       FIG. 3  is a cross-section elevation of a semiconductor device package  300  that includes an anisotropically conductive flexible film  310  with anisotropic electrical and heat conductivities according to an embodiment. The anisotropically conductive flexible film  310  exhibits anisotropic electrical conductivity with a plurality of electrically conductive channels  312 . The anisotropically conductive flexible film  310  also exhibits anisotropic heat conductivity with a plurality of the electrically conductive channels  312  that abut at least one heat sink. 
     In an embodiment, a first semiconductive device  316  that may be referred to as a bottom device  316  is mounted on a first semiconductor package substrate  324 . As illustrated, the first semiconductive device  316  is flip-chip mounted on the semiconductor package substrate  324 . A heat sink  326  abuts the flip-chip mounted first semiconductive device  316 . 
     In an embodiment, the heat sink  326  has the form factor of an integrated heat spreader (IHS)  326 , which may also be referred to as a “lid”  326 . In an embodiment, insulated through-sink vias  328  in the heat sink  326  connect the semiconductor package substrate  324  to the anisotropically conductive flexible film  310 . A subsequent semiconductor package substrate  330  completes a connection from the first semiconductor package substrate  324 , through the insulated through-sink via  328  and the anisotropically conductive flexible film  310 . An electrical bump  334  on the first semiconductor package substrate  324  contacts the insulated through-sink via  328 , which contacts an electrically conductive channel  312   s  within the anisotropically conductive flexible film  310 . The electrically conductive channel  312   s  in turn contacts the subsequent semiconductor package substrate  330 . 
     In an embodiment, electrical communication between the first semiconductor package substrate  324  and the subsequent semiconductor package substrate  330  allows for devices respectively disposed on the package substrates  324  and  330 , to be physically closer to each other than if they were to be disposed on a single semiconductor package substrate, or on a board such as a motherboard. Consequently, an X-Y footprint of the semiconductor device package  300  is small, which allows for a smaller form factor with the same or higher computational function with equivalent components. 
     Although the several electrically conductive channels are depicted with the reference number base  312 , the position of the channels within the semiconductor device package  300 , create different structural context. In an embodiment, the electrically conductive channel  312   s , completes a connection from the first semiconductor package substrate  324 , through the insulated through-sink via  326  and the anisotropically conductive flexible film  310 . This represents a substantially vertical composite interconnect that includes an electrical bump  334  on the first semiconductor package substrate  324 , an insulated through-sink via  328 , and the electrically conductive channel  312   s . This substantially vertical composite interconnect  334 ,  328  and  312   s  is a substrate-to-substrate-bridging composite interconnect. 
     In an embodiment, an electrically conductive channel  312   v  completes a connection between the first semiconductive device  316 , a through-silicon via  332  in the first semiconductive device  316 , and to the subsequent semiconductor package substrate  330 . This electrically conductive channel  312   v  with the anisotropically conductive flexible film  310  represents a die-to-substrate bridging composite interconnect. 
     In an embodiment, a heat-transfer conductive channel  312   x  in the anisotropically conductive flexible film  310  creates a composite heat-transfer structure. This composite heat-transfer structure allows heat flow from the first semiconductive device  316 , the heat sink  326 , the heat-transfer conductive channel  312   x , and an optionally present bond pad  333  and a through-substrate via  336  to a shielding can  338  that encloses the several components of the semiconductor device package  300 . 
     In an embodiment, bottom-side additional components include a second semiconductive device  340  on the first semiconductor package substrate  324 . In an embodiment, the second semiconductive device  340  is a memory die. In an embodiment, other components  342 ,  344  and  346  are disposed on the first semiconductor package substrate  324 . 
     In an embodiment, top-side additional components include a subsequent semiconductive device  348 , and components  350 ,  352  and  354 . In an embodiment, the subsequent semiconductive device  348  is a transceiver for wireless telecommunications. Communication between bottom devices  316 ,  340 ,  342 , and  344  to top devices  348 ,  350 ,  352  and  354  are all bridged through the anisotropically conductive flexible film  310 . 
     In an embodiment, the first semiconductor package substrate  324  is mounted through a board-side bump  356  to a board  358  such as a motherboard  358 . After forming the electrical bumps  356  (one instance enumerated), the first semiconductor device substrate  324  is seated on the board  358 , and in an embodiment, the board  358  includes an external shell  360  that provides both physical and electrical insulation for devices within the external shell  360 . 
       FIG. 3A  is a cross-section elevation of a portion of the semiconductor device package  300  depicted in  FIG. 3  during assembly according to an embodiment. The semiconductor device package  301  is inverted along the X-axis such that a negative-Z direction is represented compared to the illustration in  FIG. 3 . Further, the subsequent semiconductor package substrate  330  is expanded along the Z-direction for more detail. 
     During assembly, an electrically conductive adhesive  335  is deposited into the shielding can  338 , and the subsequent semiconductor package substrate  330  is seated onto the electrically conductive adhesive  335 . In an embodiment, the adhesive  335  has dielectric but thermal conductivity properties. 
     Within the subsequent semiconductor package substrate  330  includes copper routing layers that connect the anisotropically conductive flexible film  310  (see  FIG. 3 ) both with passive devices such as devices  350 ,  352 , and  354  and a ground plane  329  within the subsequent semiconductor package substrate  330 . Included within the subsequent semiconductor package substrate  330  are thermal vias such as the through-substrate via  336 . 
       FIG. 4  is a cross-section elevation of a semiconductor device package  400  that includes an anisotropically conductive flexible film  410  with anisotropic electrical and heat conductivities according to an embodiment. The anisotropically conductive flexible film  410  exhibits anisotropic electrical conductivity with a plurality of electrically conductive channels  412 . 
     In an embodiment, a first semiconductive device  416  that may be referred to as a bottom device  416  is mounted on a first semiconductor package substrate  424 . As illustrated, the first semiconductive device  416  is flip-chip disposed opposite the anisotropically conductive flexible film  410 . As illustrated, the first semiconductive device  416  is “opossum” mounted on the first semiconductor package substrate  424 . In an embodiment, the first semiconductive device  416  is mounted on a land side  423 , and opposite the land side  423  is a bridge side  425  onto which the anisotropically conductive flexible film  410  is mounted. In an embodiment, the anisotropically conductive flexible film  410  may be referred to as a bridge film  410 . 
     In an embodiment, a subsequent semiconductor package substrate  430  completes a connection from the first semiconductor package substrate  424 , through the bridge film  410 . A subsequent semiconductive device  446  is disposed on the subsequent semiconductor package substrate  430 . It can be seen a bilateral qualitative symmetry is depicted with the first and subsequent semiconductive devices  416  and  446  are connected across respective first and subsequent semiconductor package substrates  424  and  430 , with the anisotropically conductive flexible film  410  disposed in the center. The qualitative symmetry means five structures are configured with the anisotropically conductive flexible film the central structure. 
     In an embodiment, electrical communication through the anisotropically conductive flexible film  410 , between the first semiconductor package substrate  424  and the subsequent semiconductor package substrate  430 , allows for devices respectively disposed on the package substrates  424  and  430 , to be physically closer to each other than if they were to be disposed on a single semiconductor package substrate, or on a board such as a motherboard. Consequently, an X-Y footprint of the semiconductor device package  400  is small, which allows for a smaller form factor with the same or higher computational function with equivalent components. The several interconnects  412 , represents a vertical interconnect that is a substrate-to-substrate-bridging interconnect. 
     In an embodiment, a bottom-side additional component  440  is disposed on the bridge side  425  of the first semiconductor package substrate  424 . 
     In an embodiment, top-side additional components include the subsequent semiconductive device  446 , and components  448  and  450 . In an embodiment, the subsequent semiconductive device  446  is a memory die. 
     In an embodiment, the first semiconductor package substrate  424  is depicted being mounted through a hoard-side bump  454  to a board  458  such as a motherboard  458 . After forming the electrical bumps  454  (one instance enumerated), the first semiconductor device substrate  424  is seated on the board  458 , and in an embodiment, the board  458  includes an external shell  460  that provides both physical and electrical insulation for devices within the external shell  460 . 
     Where connection pad sizes are different as these pads contact the anisotropically conductive flexible film  410 , pitch matching is no necessary where the X-direction density of the several interconnects  412  may contact several bond pads, e.g.,  424 ′ and  424 ″ on the first semiconductive package substrate  424 , but e.g., only one  430 ′ (or a comparatively different bond-pad count) of the several contacts may contact a bond pad on the subsequent semiconductive package substrate  430 . 
       FIG. 5  is a cross-section elevation of a semiconductor device package  500  that includes an anisotropically conductive flexible film  510  with anisotropic electrical and heat conductivities according to an embodiment. The anisotropically conductive flexible film  510  exhibits anisotropic electrical conductivity with a plurality of electrically conductive channels  512 . The anisotropically conductive flexible film  510  also exhibits anisotropic heat conductivity with a plurality of the electrically conductive channels  512  that abut at least one heat sink. 
     In an embodiment, a first semiconductive device  516  that may be referred to as a bottom device  516  is mounted on a first semiconductor package substrate  524 , and a subsequent semiconductive device  546  is disposed above a heat sink  526 . The anisotropically conductive flexible film  510  is disposed between the heat sink  526  and the subsequent semiconductive device  546 . 
     As illustrated, the first semiconductive device  516  is flip-chip mounted on the first semiconductor package substrate  524 . The heat sink  526  abuts the flip-chip mounted first semiconductive device  516 . 
     In an embodiment, the heat sink  526  has the form factor of an integrated heat spreader (IHS)  526 , which may also be referred to as a “lid”  526 . In an embodiment, insulated through-sink vias  528  in the heat sink  526  connect the first semiconductor package substrate  524  to the anisotropically conductive flexible film  510 . The subsequent semiconductive device  546  is also flip-chip mounted onto a subsequent semiconductor package substrate  530 . 
     One electrical communication path between the first semiconductor package substrate  524  and the subsequent semiconductor package substrate  530 , includes an electrical bump  534  that contacts an insulated through-sink via  528 . The insulated through-sink via  528  contacts an electrically conductive channel  512   v  in the anisotropically conductive flexible film  510 . The electrically conductive channel  512   v  contacts a top-device through-silicon via  532   t  in the top or subsequent semiconductive device  546 . And the subsequent semiconductive device  546  completes the connection from the first semiconductor package substrate  524  to the subsequent semiconductor package substrate  530  through a top electrical hump  550 . 
     In an embodiment, one electrical communication path between the first semiconductor package substrate  524  and the subsequent semiconductor package substrate  530 , includes two through-silicon via (TSV) structures, including a bottom TSV  532   b  and a top TSV  532   t ′, both of which contact an electrically conductive channel  512   v  in the anisotropically conductive flexible film  510 . The electrically conductive channel  512   v  contacts both through-silicon via  532   b  in the bottom or first semiconductor device  516 , and through-silicon via  532   t ′ in the top or subsequent semiconductive device  546 . And the subsequent semiconductive device  546  completes the connection from the first semiconductor package substrate  524  to the subsequent semiconductor package substrate  530  through a top electrical bump  550 ′. 
     In an embodiment, electrical communication between the first semiconductor package substrate  524  and the subsequent semiconductor package substrate  530 , allows for devices respectively disposed on the package substrates  524  and  530 , to be physically closer to each other than if they were to be disposed on a single semiconductor package substrate, or on a board such as a motherboard. Consequently, an X-Y footprint of the semiconductor device package  300  is small, which allows for a smaller form factor with the same or higher computational function with equivalent components. 
     In an embodiment, a heat-transfer conductive channel  512   x  in the isotropically conductive flexible film  510  is part of a composite heat-transfer structure. This composite heat-transfer structure allows heat flow from the first semiconductive device  516 , the heat sink  526 , the heat-transfer conductive channel  512   x , and the subsequent semiconductive device  546 . 
       FIG. 6  is a cross-section elevation of a semiconductor device package  600  that includes an anisotropically conductive flexible film  610  with anisotropic electrical and heat conductivities according to an embodiment. The anisotropically conductive flexible film  610  exhibits anisotropic electrical conductivity with a plurality of electrically conductive channels  612 . 
     In an embodiment, a first semiconductive device  616  is seated at a backside into a heat sink  626 . A subsequent semiconductive device  646  is disposed face-to-face with the first semiconductive device  616  with the anisotropically conductive flexible film  610  disposed between the first semiconductive device  616  and the subsequent semiconductive device  646 . 
     As illustrated, the first semiconductive device  616  is to be flip-chip mounted onto a semiconductor package substrate  624 , and the subsequent semiconductive device  646  “opossum” hangs below the first semiconductive device with the anisotropically conductive flexible film  610  as the electronic interface between the two devices  616  and  646 . 
     In an embodiment, the heat sink  626  has the form factor of an integrated heat spreader (IHS)  626 , which may also be referred to as a “lid”  626 , but it includes sufficient contact area to bond with the semiconductor package substrate  624  with dummy bumps  633 , while selected electrical bumps  634  created electronic connection to the semiconductor package substrate  624 . 
     In an embodiment, pitch matching between the two semiconductive devices  616  and  646  is resolved by the several occurrences of the electrically conductive channels  612 , similarly to that illustrated and described for the semiconductive device package  400  depicted in  FIG. 4 . 
       FIG. 7  is a cross-section elevation of a semiconductor device package-on-package  700  that includes anisotropically conductive flexible films  710  and  711  with anisotropic electrical and heat conductivities according to an embodiment. The anisotropically conductive flexible films  710  and  711  exhibit anisotropic electrical conductivity with a plurality of electrically conductive channels  712 . In an embodiment, a first semiconductive device  716  that may be referred to as a bottom device  716  is mounted on a first semiconductor package substrate  724 . As illustrated, the first semiconductive device  716  is flip-chip mounted on the first semiconductor package substrate  724 . In an embodiment, the anisotropically conductive flexible films  710  and  711  may be referred to as bridge films  710  and  711 . 
     In an embodiment, a subsequent semiconductor package substrate  730  completes a connection from the first semiconductor package substrate  724 , through the bridging anisotropically conductive flexible films  710  and  711 , which act as a package-on-package (POP) interconnects  710  and  711 . A subsequent semiconductive device  746  is disposed on the subsequent semiconductor package substrate  730  as part of a POP device  746 . In an embodiment, a heat sink  726  abuts the subsequent semiconductive device  746 , and a bond pad  731  contacts both the subsequent semiconductive device  746  and the subsequent semiconductor package substrate  730 . 
     In an embodiment, electrical communication through the anisotropically conductive flexible films  710  and  711 , between the first semiconductor package substrate  724  and the subsequent semiconductor package substrate  730  includes several occurrences of the electrically conductive channels  712  that are coupled with bond pads  725  on first semiconductor package substrate  724  land side, and bond pads  723  on a first semiconductor package substrate  724  die side. The semiconductor device package  700  allows for devices respectively disposed on the package substrates  724  and  730 , to be physically closer to each other than if they were to be disposed on a single semiconductor package substrate, or on a board such as a motherboard. Consequently, an X-Y footprint of the semiconductor device package  700  is small, which allows for a smaller form factor with the same or higher computational function with equivalent components. The several interconnects  712 , represents vertical interconnects that are a substrate-to-substrate-bridging interconnect. 
     In an embodiment, pitch matching between the two semiconductor package substrates  724  and  730  is resolved by the several occurrences of the electrically conductive channels  712 , similarly to that illustrated and described for the semiconductive device package  400  depicted in  FIG. 4 . 
       FIG. 8  is a cross-section elevation of a semiconductor device package  800  that includes an anisotropically conductive flexible film  810  with anisotropic electrical and heat conductivities according to an embodiment. The anisotropically conductive flexible film  810  exhibits anisotropic electrical conductivity with a plurality of electrically conductive channels  812 . 
     In an embodiment, the first semiconductive device  816  abuts a heat sink  826 , which in turn is seated on a first semiconductor package substrate  824  at a bond pad  831 , and a bond pad  831  contacts both the first semiconductive device  816  and the first semiconductor package substrate  824 . The anisotropically conductive flexible film  810  contacts both the first semiconductor package substrate  824  and a subsequent semiconductor package substrate  830 . 
     In an embodiment and as illustrated, a series of first bond pads  823  contact at least one electrically conductive channel  812 , and a series of subsequent bond pads  829  on a subsequent semiconductor substrate  830  also contact at least one electrically conductive channel  812 . As illustrated and in an embodiment, where the enumerated respective first and subsequent bond pads  823  and  829  contact at least one conductive channel  812 , the respective bond pads  823  and  829  contact the same three conductive channels  812 . Although the pitch of the respective bond pads  823  and  829  are the same as illustrated, in an embodiment, the respective pitches are different for the bond pads similarly as illustrated for  FIG. 4 . 
       FIG. 9  is a cross-section elevation of a semiconductor device package  900  that includes an anisotropically conductive flexible film  910  that couples with a ribbon (or flex) interconnect  911  according to an embodiment. A first semiconductive device  916  abuts a heat sink  926  at a bond pad  931 , and the bond pad  931  contacts both the first semiconductive device  916  and a first semiconductor package substrate  924 . 
     The anisotropically conductive flexible film  910  exhibits anisotropic electrical conductivity with a plurality of electrically conductive channels  912 . Because of the plurality of electrically conductive channels  912  include a sub-plurality of these channels  912  contacting each bond pad, an electrical connection to the ribbon interconnect  911  is achieved. 
     In an embodiment, a first semiconductive device  916  is mounted on the first semiconductor package substrate  924 . As illustrated, the first semiconductive device  916  is flip-chip mounted on the first semiconductor package substrate  924 , and electrical communication to the anisotropically conductive flexible film  910  and to the ribbon interconnect  911  is accomplished through the first semiconductor package substrate  924 . 
     In an embodiment, a subsequent semiconductor package substrate  930  completes a connection from the first semiconductor package substrate  924 . In an embodiment, the subsequent semiconductor package substrate  930  is a board such as a motherboard. 
       FIG. 10  is a process flow diagram  1000  for assembling a semiconductor device package according to several embodiments. 
     At  1010 , the process includes assembling an anisotropically conductive flexible film to a bond pad of semiconductor device substrate. 
     At  1020 , the process includes assembling an anisotropically conductive flexible film to a heat sink. 
     At  1030 , the process includes assembling an anisotropically conductive flexible film to a bond pad of a semiconductive device. 
     In an embodiment, the processes of items  1010  and  1020  are depicted in  FIG. 3  where the anisotropically conductive flexible film  310  contacts the subsequent semiconductor package substrate  330  and the heat sink  326 . 
     In an embodiment, the processes of item  1020  and  1030  are depicted in  FIG. 5  where the anisotropically conductive flexible film  510  contacts the heat sink  526  and the subsequent semiconductive device  546 . 
     At  1040 , the process includes bonding the anisotropically conductive flexible film to the structures it contacts. In a non-limiting example embodiment, a thermal-compression bonding technique is used to bond the anisotropically conductive flexible film to any two or more of the three surface types. In an embodiment, compressing the anisotropically conductive flexible film is carried out where the virtual anisotropic interconnects  213  depicted in  FIG. 2B  are formed. 
     At  1050 , the process includes assembling the anisotropically conductive flexible film to a computing system. 
       FIG. 11  is included to show an example of a higher-level device application for the disclosed embodiments. The anisotropically conductive flexible film embodiments may be found in several parts of a computing system. In an embodiment, the anisotropically conductive flexible film is part of a communications apparatus such as is affixed to a cellular communications tower. The anisotropically conductive flexible film embodiments may also be referred to as a system-in-package with a wide-band phased-array antenna apparatus. In an embodiment, a computing system  1100  includes, but is not limited to, a desktop computer. In an embodiment, a system  1100  includes, but is not limited to a laptop computer. In an embodiment, a system  1100  includes, but is not limited to a netbook. In an embodiment, a system  600  includes, but is not limited to a tablet. In an embodiment, a system  1100  includes, but is not limited to a notebook computer. In an embodiment, a system  1100  includes, but is not limited to a personal digital assistant (PDA). In an embodiment, a system  1100  includes, but is not limited to a server. In an embodiment, a system  1100  includes, but is not limited to a workstation. In an embodiment, a system  1100  includes, but is not limited to a cellular telephone. In an embodiment, a system  1100  includes, but is not limited to a mobile computing device. In an embodiment, a system  1100  includes, but is not limited to a smart phone. In an embodiment, a system  1100  includes, but is not limited to an internet appliance. Other types of computing devices may be configured with the microelectronic device that includes anisotropically conductive flexible film embodiments. 
     In air embodiment, the processor  1110  has one or more processing cores  1112  and  1112 N, where  1112 N represents the Nth processor core inside processor  1110  where N is a positive integer. In an embodiment, the electronic device system  1100  using anisotropically conductive flexible film embodiments that includes multiple processors including  1110  and  1105 , where the processor  1105  has logic similar or identical to the logic of the processor  1110 . In an embodiment, the processing core  1112  includes, but is not limited to, pre-fetch logic to fetch instructions, decode logic to decode the instructions, execution logic to execute instructions and the like. In an embodiment, the processor  1110  has a cache memory  1116  to cache at least one of instructions and data for the isotropically conductive flexible film embodiments in the system  1100 . The cache memory  1116  may be organized into a hierarchal structure including one or more levels of cache memory. 
     In an embodiment, the processor  1110  includes a memory controller  1114 , which is operable to perform functions that enable the processor  1110  to access and communicate with memory  1130  that includes at least one of a volatile memory  1132  and a non-volatile memory  1134 . In an embodiment, the processor  1110  is coupled with memory  1130  and chipset  1120 . In an embodiment, the chipset  1120  is part of anisotropically conductive flexible film embodiments depicted in  FIGS. 1A, 1B, 2A, 2B, and 3 through 9 . The processor  1110  may also be coupled to a wireless antenna  1178  to communicate with any device configured to at least one of transmit and receive wireless signals. In an embodiment, the wireless antenna interface  1178  operates in accordance with, but is not limited to, the IEEE 802.11 standard and its related family, Home Plug AV (HPAV), Ultra Wide Band (UWB), Bluetooth, WiMax, or any form of wireless communication protocol. 
     In an embodiment, the volatile memory  1132  includes, but is not limited to, Synchronous Dynamic Random Access Memory (SDRAM), Dynamic Random Access Memory (DRAM), RAMBUS Dynamic Random Access Memory (RDRAM), and/or any other type of random access memory device. The non-volatile memory  1134  includes, but is not limited to, flash memory, phase change memory (PCM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), or any other type of non-volatile memory device. 
     The memory  1130  stores information and instructions to be executed by the processor  1110 . In an embodiment, the memory  1130  may also store temporary variables or other intermediate information while the processor  1110  is executing instructions. In the illustrated embodiment, the chipset  1120  connects with processor  1110  via Point-to-Point (PtP or P-P) interfaces  1117  and  1122 . Either of these PtP embodiments may be achieved using anisotropically conductive flexible film embodiments as set forth in this disclosure. The chipset  1120  enables the processor  1110  to connect to other elements in anisotropically conductive flexible film embodiments in a system  1100 . In an embodiment, interfaces  1117  and  1122  operate in accordance with a PtP communication protocol such as the Intel® QuickPath Interconnect (QPI) or the like. In other embodiments, a different interconnect may be used. 
     In an embodiment, the chipset  1120  is operable to communicate with the processor  1110 ,  1105 N, the display device  1140 , and other devices  1172 ,  1176 ,  1174 ,  1160 ,  1162 ,  1164 ,  1166 ,  1177 , etc. The chipset  1120  may also be coupled to a wireless antenna  1178  to communicate with any device configured to at least do one of transmit and receive wireless signals. 
     The chipset  1120  connects to the display device  1140  via the interface  1126 . The display  1140  may be, for example, a liquid crystal display (LCD), a plasma display, cathode ray tube (CRT) display, or any other form of visual display device. In an embodiment, the processor  1110  and the chipset  1120  are merged into a system-in-package with a wide-band phased-array antenna module apparatus in a system. Additionally, the chipset  1120  connects to one or more buses  1150  and  1155  that interconnect various elements  1174 ,  1160 ,  1162 ,  1164 , and  1166 . Buses  1150  and  1155  may be interconnected together via a bus bridge  1172  such as at least one isotropically conductive flexible film embodiment. In an embodiment, the chipset  1120 , via interface  1124 , couples with a non-volatile memory  1160 , a mass storage device(s)  1162 , a keyboard/mouse  1164 , a network interface  1166 , smart TV  1176 , and the consumer electronics  1177 , etc. 
     In an embodiment, the mass storage device  1162  includes, but is not limited to, a solid state drive, a hard disk drive, a universal serial bus flash memory drive, or any other form of computer data storage medium. In one embodiment, the network interface  1166  is implemented by any type of well-known network interface standard including, but not limited to, an Ethernet interface, a universal serial bus (USB) interface, a Peripheral Component Interconnect (PCI) Express interface, a wireless interface and/or any other suitable type of interface. In one embodiment, the wireless interface operates in accordance with, but is not limited to, the IEEE 802.11 standard and its related family, Home Plug AV (HPAV), Ultra Wide Band (UWB), Bluetooth, WiMax, or any form of wireless communication protocol. 
     While the modules shown in  FIG. 11  are depicted as separate blocks within the isotropically conductive flexible film embodiments in a computing system  1100 , the functions performed by some of these blocks may he integrated within a single semiconductor circuit or may be implemented using two or more separate integrated circuits. For example, although cache memory  1116  is depicted as a separate block within processor  1110 , cache memory  1116  (or selected aspects of  1116 ) can be incorporated into the processor core  1112 . 
     Where useful, the computing system  1100  may have a broadcasting structure interface such as for affixing the apparatus to a cellular tower. 
     To illustrate the anisotropically conductive flexible film embodiments and methods disclosed herein, a non-limiting list of examples is provided herein: 
     Example 1 is a semiconductor device package, comprising: an anisotropically conductive flexible film including a plurality of electrically conductive corridors disposed therein; a semiconductor package substrate coupled to the anisotropically conductive flexible film; and a semiconductive device, wherein at least one of the semiconductor package substrate and the semiconductive device is in direct contact with the anisotropically conductive flexible film. 
     In Example 2, the subject matter of Example 1 optionally includes wherein the anisotropically conductive flexible film includes virtual anisotropic interconnects. 
     In Example 3, the subject matter of any one or more of Examples 1-2 optionally include wherein the semiconductor package substrate is a subsequent semiconductor package substrate, further including: a first semiconductor package substrate, wherein the semiconductive device is flip-chip disposed on the first semiconductor package substrate; a heat sink in direct contact with the anisotropically conductive flexible film, wherein the heat sink includes an insulated through-sink via, wherein the insulated through-sink via contacts both the first semiconductor package substrate and the anisotropically conductive flexible film; wherein the anisotropically conductive flexible film is in direct contact with the subsequent semiconductor package substrate; and a subsequent device disposed on the subsequent semiconductor package substrate. 
     In Example 4, the subject matter of any one or more of Examples 1-3 optionally include wherein the semiconductor package substrate is a subsequent semiconductor package substrate, further including: a first semiconductor package substrate, wherein the semiconductive device is flip-chip disposed on the first semiconductor package substrate; a heat sink in direct contact with the anisotropically conductive flexible film, wherein the heat sink includes an insulated through-sink via, wherein the insulated through-sink via contacts both the first semiconductor package substrate and the anisotropically conductive flexible film; wherein the anisotropically conductive flexible film is in direct contact with the subsequent semiconductor package substrate; a subsequent device disposed on the subsequent semiconductor package substrate; a third semiconductive device disposed on the first semiconductor package substrate; at least two passive devices, one each of which is disposed on one of the first semiconductor package substrate and the subsequent semiconductor package substrate. 
     In Example 5, the subject matter of any one or more of Examples 1-4 optionally include wherein the semiconductor package substrate is a subsequent semiconductor package substrate, further including: a first semiconductor package substrate, wherein the semiconductive device is flip-chip disposed on the first semiconductor package substrate; a heat sink in direct contact with the anisotropically conductive flexible film, wherein the heat sink includes an insulated through-sink via, wherein the insulated through-sink via contacts both the first semiconductor package substrate and the anisotropically conductive flexible film; wherein the anisotropically conductive flexible film is in direct contact with the subsequent semiconductor package substrate; a subsequent semiconductive device disposed on the subsequent semiconductor package substrate; wherein the anisotropically conductive flexible film is also in direct contact with the heat sink; and a shielding can disposed on the first semiconductor package substrate, wherein the shielding can encloses the first and subsequent semiconductive devices. 
     In Example 6, the subject matter of any one or more of Examples 1-5 optionally include wherein the semiconductor package substrate is a first semiconductor package substrate, further including: a subsequent semiconductor package substrate, wherein the first semiconductor package substrate and the subsequent semiconductor package substrate each abuts the anisotropically conductive flexible film, and wherein the semiconductive device is disposed the first semiconductor package substrate opposite the anisotropically conductive flexible film. 
     In Example 7, the subject matter of any one or more of Examples 1-6 optionally include wherein the semiconductor package substrate is a first semiconductor package substrate, and wherein the semiconductive device is a first semiconductive device, further including: a subsequent semiconductor package substrate, wherein the first semiconductor package substrate and the subsequent semiconductor package substrate each abuts the anisotropically conductive flexible film, and wherein the first semiconductive device is disposed on the first semiconductor package substrate opposite the anisotropically conductive flexible film; a subsequent semiconductive device disposed on the subsequent semiconductor package substrate, wherein a bilateral qualitative symmetry is configured with the first semiconductive device, the first semiconductor package substrate, the anisotropically conductive flexible film, the subsequent semiconductor package substrate, and the subsequent semiconductive device. 
     In Example 8, the subject matter of any one or more of Examples 1-7 optionally include wherein the semiconductor package substrate is a subsequent semiconductor package substrate, and the semiconductive device is a subsequent semiconductive device disposed on the subsequent semiconductor package substrate, further including: a first semiconductive device disposed on a first semiconductor package substrate; a heat sink that abuts the first semiconductive device and that is in direct contact with the anisotropically conductive flexible film, wherein the heat sink includes an insulated through-sink via, wherein the insulated through-sink via contacts the anisotropically conductive flexible film and the first semiconductor package substrate, and the anisotropically conductive flexible film contacts the subsequent semiconductive device; and wherein the subsequent semiconductive device abuts the anisotropically conductive flexible film. 
     In Example 9, the subject matter of any one or more of Examples 1-8 optionally include wherein the semiconductive device is a first semiconductive device, further including: a subsequent semiconductive device; a heat sink that abuts the subsequent semiconductive device, wherein the first and subsequent semiconductive devices are seated on the anisotropically conductive flexible film; and wherein the semiconductor package substrate is bonded to each of the heat sink and the subsequent semiconductive device. 
     In Example 10, the subject matter of any one or more of Examples 1-9 optionally include wherein the semiconductive device is a first semiconductive device, further including: a subsequent semiconductive device; a heat sink that abuts the subsequent semiconductive device, wherein the first and subsequent semiconductive devices are seated on the anisotropically conductive flexible film; and wherein the semiconductor package substrate is bonded to each of the heat sink and the subsequent semiconductive device, and wherein the first semiconductive device is suspended from the anisotropically conductive flexible film, above the semiconductor device package. 
     In Example 11, the subject matter of any one or more of Examples 1-10 optionally include wherein the anisotropically conductive flexible film is a first anisotropically conductive flexible film, further including: a subsequent anisotropically conductive flexible film, that forms with the first anisotropically conductive flexible film, a package-on-package interconnect structure; a subsequent semiconductor package, wherein the first and subsequent anisotropically conductive flexible films support the subsequent semiconductor package above the first semiconductor package; and a subsequent semiconductive device disposed on the subsequent semiconductor package. 
     In Example 12, the subject matter of any one or more of Examples 1-11 optionally include wherein the anisotropically conductive flexible film is a first anisotropically conductive flexible film, further including: a subsequent anisotropically conductive flexible film, that forms a package-on-package interconnect structure with the first anisotropically conductive flexible film; a subsequent semiconductor package, wherein the first and subsequent anisotropically conductive flexible films support the subsequent semiconductor package above the first semiconductor package; a subsequent semiconductive device disposed on the subsequent semiconductor package; and a heat sink disposed on the subsequent semiconductor package, wherein the heat sink abuts the subsequent semiconductive device. 
     In Example 13, the subject matter of any one or mare of Examples 1-12 optionally include wherein the semiconductor package substrate is a first semiconductor package substrate that abuts the anisotropically conductive flexible film, further including: a subsequent semiconductor package substrate that abuts the anisotropically conductive flexible film, wherein the semiconductive device is disposed on the subsequent semiconductor device substrate; and wherein the anisotropically conductive flexible film includes more than one anisotropic contact corridor that contact a single bond pad on at least one of the first and subsequent semiconductor package substrates. 
     In Example 14, the subject matter of any one or more of Examples 1-13 optionally include wherein the semiconductor package substrate is a first semiconductor package substrate that abuts the anisotropically conductive flexible film, further including: a subsequent semiconductor package substrate that abuts the anisotropically conductive flexible film, wherein the semiconductive device is disposed on the subsequent semiconductor device substrate; wherein the anisotropically conductive flexible film includes more than one anisotropic contact corridor that contact a single bond pad on at least one of the first and subsequent semiconductor package substrates; and a heat sink seated on the subsequent semiconductor package substrate, wherein the heat sink also abuts the semiconductive device. 
     In Example 15, the subject matter of any one or more of Examples 1-14 optionally include wherein the semiconductor package substrate is a first semiconductor package substrate, further including: a subsequent semiconductor package substrate disposed below the first semiconductor package substrate; a ribbon connector that contacts the anisotropically conductive flexible film, wherein the anisotropically conductive flexible film contacts the first semiconductor package substrate, and wherein the semiconductive device is disposed on the first semiconductor package substrate; and a heat sink seated on the first semiconductor package substrate, wherein the heat sink also abuts the semiconductive device. 
     Example 16 is a process of assembling a semiconductor device package, comprising: assembling an anisotropically conductive flexible film to at least one of: a bond pad on a semiconductor package substrate; a bond pad on a semiconductive device; and a heat sink; bonding the anisotropically conductive flexible film under conditions to form at least one of an electronic connection and a heat-transfer conductive channel. 
     In Example 17, the subject matter of Example 16 optionally includes wherein the semiconductor package substrate is a subsequent semiconductor package substrate, further including: assembling a first semiconductor package substrate to the heat sink; and assembling a shielding can to the semiconductor package substrate. 
     In Example 18, the subject matter of any one or more of Examples 16-17 optionally include wherein the semiconductor package substrate is a first semiconductor package substrate, further including: assembling a subsequent semiconductor package substrate to the anisotropically conductive flexible film, and wherein the semiconductive device is disposed on the first semiconductor package substrate opposite the anisotropically conductive flexible film; and assembling a subsequent semiconductive device on the subsequent semiconductor package substrate, wherein a bilateral qualitative symmetry is configured with the first semiconductive device, the first semiconductor package substrate, the anisotropically conductive flexible film, the subsequent semiconductor package substrate, and the subsequent semiconductive device. 
     In Example 19, the subject matter of any one or more of Examples 16-18 optionally include wherein the semiconductor package substrate is a subsequent semiconductor package substrate, and the semiconductive device is a subsequent semiconductive device disposed on the subsequent semiconductor package substrate, further including: assembling a first semiconductive device on a first semiconductor package substrate; wherein assembling the heat sink to abut the first semiconductive device and that is in direct contact with the anisotropically, conductive flexible film, wherein the heat sink includes an insulated through-sink via, wherein the insulated through-sink via contacts the anisotropically, conductive flexible film and the first semiconductor package substrate, and the anisotropically conductive flexible film contacts the subsequent semiconductive device; and wherein assembling the subsequent semiconductive device to abut the anisotropically conductive flexible film. 
     In Example 20, the subject matter of any one or more of Examples 16-19 optionally include wherein the semiconductive device is a first semiconductive device, further including: assembling a subsequent semiconductive device to the first semiconductive device through the anisotropically conductive flexible film; and wherein assembling the heat sink to abut the subsequent semiconductive device; and wherein bonding the anisotropically conductive flexible film causes the semiconductor package substrate to be bonded to each of the heat sink and the subsequent semiconductive device. 
     In Example 21, the subject matter of any one or more of Examples 16-20 optionally include wherein the anisotropically conductive flexible film is a first anisotropically conductive flexible film, further including: bonding a subsequent anisotropically conductive flexible film to form a package-on-package interconnect structure with the with the first anisotropically conductive flexible film; seating the semiconductive device on the subsequent semiconductor package, wherein the first and subsequent anisotropically conductive flexible films support the subsequent semiconductor package above the first semiconductor package; and seating a heat sink on the subsequent semiconductive device disposed on the subsequent semiconductor package. 
     In Example 22, the subject matter of any one or more of Examples 16-21 optionally include wherein the semiconductor package substrate is a first semiconductor package substrate that is assembled to the anisotropically conductive flexible film, further including: assembling a subsequent semiconductor package substrate to abut the anisotropically conductive flexible film, wherein the semiconductive device is disposed on the subsequent semiconductor device substrate; and wherein bonding includes bonding the anisotropically conductive flexible film to include more than one anisotropic contact corridor contacting a single bond pad on at least one of the first and subsequent semiconductor package substrates. 
     In Example 23, the subject matter of any one or mare of Examples 16-22 optionally include wherein the semiconductor package substrate is a first semiconductor package substrate, further including: bonding a subsequent semiconductor package substrate below the first semiconductor package substrate; bonding a ribbon connector to contact the anisotropically conductive flexible film, wherein the anisotropically conductive flexible film contacts the first semiconductor package substrate, and wherein the semiconductive device is disposed on the first semiconductor package substrate; and seating a heat sink on the first semiconductor package substrate, wherein the heat sink also abuts the semiconductive device. 
     Example 24 is a computing system, comprising: an anisotropically conductive flexible film including a plurality of electrically conductive corridors disposed therein; a semiconductor package substrate coupled to the anisotropically conductive flexible film; a semiconductive device, wherein at least one of the semiconductor package substrate and the semiconductive device is in direct contact with the anisotropically conductive flexible film; and wherein the semiconductive device is coupled with memory and a chipset. 
     In Example 25, the subject matter of Example 24 optionally includes a board to which the semiconductor package substrate is coupled; and a heat sink seated on the board, wherein the heat sink also contacts the anisotropically conductive flexible film. 
     The above detailed description includes references to the accompanying drawings, which form a part of the detailed description. The drawings show, by way of illustration, specific embodiments in which the invention can be practiced. These embodiments are also referred to herein as “examples.” Such examples can include elements in addition to those shown or described. However, the present inventors also contemplate examples in which only those elements shown or described are provided. Moreover, the present inventors also contemplate examples using any combination or permutation of those elements shown or described (or one or more aspects thereof), either with respect to a particular example (or one or more aspects thereof), or with respect to other examples more aspects thereof) shown or described herein. 
     In the event of inconsistent usages between this document and any documents so incorporated by reference, the usage in this document controls. 
     In this document, the terms “a” or “an” are used, as is common in patent documents, to include one or more than one, independent of any other instances or usages of “at least one” or “one or more.” In this document, the term “or” is used to refer to a nonexclusive or, such that “A or B” includes “A but not B,” “B but not A,” and “A and B,” unless otherwise indicated. In this document, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Also, in the following claims, the terms “including” and “comprising” are open-ended, that is, a system, device, article, composition, formulation, or process that includes elements in addition to those listed after such a term in a claim are still deemed to fall within the scope of that claim. Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects. 
     Method examples described herein can be machine or computer-implemented at least in part. Some examples can include a computer-readable medium or machine-readable medium encoded with instructions operable to configure an electrical device to perform methods as described in the above examples. An implementation of such methods can include code, such as microcode, assembly language code, a higher-level language code, or the like. Such code can include computer readable instructions for performing various methods. The code may form portions of computer program products. Further, in an example, the code can be tangibly stored on one or more volatile, non-transitory, or non-volatile tangible computer-readable media, such as during execution or at other times. Examples of these tangible computer-readable media can include, but are not limited to, hard disks, removable magnetic disks, removable optical disks (e.g., compact disks and digital video disks), magnetic cassettes, memory cards or sticks, random access memories (RAMs), read only memories (ROMs), and the like. 
     The above description is intended to be illustrative, and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. Other embodiments can be used, such as by one of ordinary skill in the art upon reviewing the above description. The Abstract is provided to comply with 37 C.F.R. § 1.72(b), to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. Also, in the above Detailed Description, various features may be grouped together to streamline the disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the Detailed Description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that such embodiments can be combined with each other in various combinations or permutations. The scope of the disclosed embodiments should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.