Patent Publication Number: US-2020296823-A1

Title: Multi-package on-board waveguide interconnects

Description:
BACKGROUND 
     With each computing generation, the amount of data to be moved and processed on the platform increases. Data may need to be moved between various types of processors, memories, etc. for computing and storage. The increasing demand in data rate may mean denser and more complex routing schemes may be used on the motherboard to support the high-speed communication links between the different packages. One consequence of these schemes may be advanced design rules, increased layer count on the motherboard, etc., which may increase the cost of production of a product. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  depicts an example electronic module of an electronic device, in accordance with various embodiments herein. 
         FIG. 2  depicts an alternative example electronic module of an electronic device, in accordance with various embodiments herein. 
         FIG. 3  depicts an alternative example electronic module of an electronic device, in accordance with various embodiments herein. 
         FIG. 4  depicts an alternative example electronic module of an electronic device, in accordance with various embodiments herein. 
         FIG. 5  depicts an alternative example electronic module of an electronic device, in accordance with various embodiments herein. 
         FIG. 6  depicts an alternative example electronic module of an electronic device, in accordance with various embodiments herein. 
         FIG. 7  depicts an example technique for making a electronic module of an electronic device, in accordance with various embodiments herein. 
         FIG. 8  illustrates an example device that may use various embodiments herein, in accordance with various embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     In the following detailed description, reference is made to the accompanying drawings which form a part hereof, wherein like numerals designate like parts throughout, and in which is shown by way of illustration embodiments in which the subject matter of the present disclosure may be practiced. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present disclosure. Therefore, the following detailed description is not to be taken in a limiting sense, and the scope of embodiments is defined by the appended claims and their equivalents. 
     For the purposes of the present disclosure, the phrase “A or B” means (A), (B), or (A and B). For the purposes of the present disclosure, the phrase “A, B, or C” means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B and C). 
     The description may use perspective-based descriptions such as top/bottom, in/out, over/under, and the like. Such descriptions are merely used to facilitate the discussion and are not intended to restrict the application of embodiments described herein to any particular orientation. 
     The description may use the phrases “in an embodiment,” or “in embodiments,” which may each refer to one or more of the same or different embodiments. Furthermore, the terms “comprising,” “including,” “having,” and the like, as used with respect to embodiments of the present disclosure, are synonymous. 
     The term “coupled with,” along with its derivatives, may be used herein. “Coupled” may mean one or more of the following. “Coupled” may mean that two or more elements are in direct physical or electrical contact. However, “coupled” may also mean that two or more elements indirectly contact each other, but yet still cooperate or interact with each other, and may mean that one or more other elements are coupled or connected between the elements that are said to be coupled with each other. The term “directly coupled” may mean that two or elements are in direct contact. 
     In various embodiments, the phrase “a first feature formed, deposited, or otherwise disposed on a second feature,” may mean that the first feature is formed, deposited, or disposed over the feature layer, and at least a part of the first feature may be in direct contact (e.g., direct physical or electrical contact) or indirect contact (e.g., having one or more other features between the first feature and the second feature) with at least a part of the second feature. 
     Various operations may be described as multiple discrete operations in turn, in a manner that is most helpful in understanding the claimed subject matter. However, the order of description should not be construed as to imply that these operations are necessarily order dependent. 
     Embodiments herein may be described with respect to various Figures. Unless explicitly stated, the dimensions of the Figures are intended to be simplified illustrative examples, rather than depictions of relative dimensions. For example, various lengths/widths/heights of elements in the Figures may not be drawn to scale unless indicated otherwise. Additionally, some schematic illustrations of example structures of various devices and assemblies described herein may be shown with precise right angles and straight lines, but it is to be understood that such schematic illustrations may not reflect real-life process limitations which may cause the features to not look so “ideal” when any of the structures described herein are examined, e.g., using scanning electron microscopy (SEM) images or transmission electron microscope (TEM) images. In such images of real structures, possible processing defects could also be visible, e.g., not-perfectly straight edges of materials, tapered vias or other openings, inadvertent rounding of corners or variations in thicknesses of different material layers, occasional screw, edge, or combination dislocations within the crystalline region, and/or occasional dislocation defects of single atoms or clusters of atoms. There may be other defects not listed here but that are common within the field of device fabrication. 
     As noted above, the amounts of data to be moved/processed on an electronic device platform may be increasing. The consequences of this increase may include more advanced design rules, increased layer count, etc. Embodiments herein relate to reducing the signal congestion on a circuit board by introducing high-speed signal links that occupy a smaller motherboard footprint. Specifically, the high-speed signal links may be or include one or more waveguide channels that allow for communication of electromagnetic signals in the millimeter-wave (mmWave) frequency band, which may generally be considered to be between approximately 20 gigahertz (GHz) and approximately 300 GHz. In some embodiments, the electromagnetic signals may have an even higher frequency than the mmWave-frequency band and may be, e.g., on the order of 300 GHz or above (i.e., terahertz (THz)-wave frequencies), 1 THz, or above, or higher. 
     More specifically, embodiments herein relate to use of a waveguide channel as an ultra-high-speed wireline communication link between two packages on a same circuit board or between two dies directly coupled to the same circuit board. The waveguide channel may operate at mmWave or THz-wave frequencies. Use of such a waveguide channel may provide a number of advantages. For example, the relatively high bandwidth density of the waveguide channel may reduce the number of traces that are to be implemented on a board or package. Additionally, use of the waveguide channel may enable socket-less communication between various chips on the same circuit board. As a result, the thickness and footprint reduction of the circuit board may be possible, which may result in cost reduction and smaller form factors of products that use embodiments herein. Additionally, direct chip attach (e.g., where the chip is directly coupled with the circuit board) may be possible in some applications such as portable or client devices. 
     More generally, embodiments herein may include an electronic module that includes multiple microelectronic packages on a circuit board. The electronic module or the circuit board may be, for example, considered to be a motherboard of an electronic device. In other embodiments, the electronic module or the circuit board may be, for example, considered to be an interposer or some other type of electronic module or circuit board. 
     In some embodiments, the microelectronic package may be or may be similar to a semiconductor package that includes one or more dies coupled with a package substrate. The dies of the microelectronic packages may have an active element (e.g., a processor, a memory, etc.) and one or more passive elements (e.g., resistors, capacitors, etc.). The semiconductor package may be coupled with the circuit board with one or more other elements (e.g., a socket, an interposer, etc.) positioned therebetween, or the semiconductor package may be directly coupled with the circuit board by some form of an interconnect. In other embodiments, the microelectronic package may not have the package substrate, and instead the die may be directly coupled with the circuit board by some form of an interconnect. 
     It may be desirable for two or more of the microelectronic packages to communicate at data speeds in the order of 10s to 1000s of gigabits per second (Gbps). In order to communicate at these data speeds, it may be desirable to use an on-board waveguide channel that is capable of propagating an electromagnetic wave in the mmWave-frequencies, THz-frequencies, or above. 
       FIG. 1  depicts an example electronic module  100  of an electronic device, in accordance with various embodiments herein. It will be noted that each and every element of  FIG. 1  may not be labeled for the sake of avoidance of clutter of the Figure. However, it will be understood from the picture and the below description that similar-looking elements in similar places (e.g., like the interconnects, vias, etc.) may share characteristics with one another. 
     The circuit board may include two microelectronic packages  105   a  and  105   b  (collectively, microelectronic packages  105 ). In the embodiment of  FIG. 1 , the microelectronic packages  105   a / 105   b  may include a package substrate  120   a / 120   b  with a die  110   a / 110   b  attached thereto. The package substrates  120   a / 120   b  may be collectively referred to herein as package substrates  120 , and the dies  110   a / 110   b  may be collectively referred to herein as dies  110 . 
     The package substrates  120  may be cored or coreless. In various embodiments, the package substrates  120  may include one or more layers of an organic or inorganic dielectric material. The dielectric material may be, for example, a build-up film made of silica-filled epoxy, or some other appropriate dielectric material. The package substrates  120  may also include one or more conductive elements such as traces, pads, vias, etc. that may route signals from one area or element of the package substrate  120  to another. Such a via may be via  160 , which may communicatively couple an element at one side of the package substrate  120  with another side of the package substrate  120 . It will be understood that although only a single via  160  is depicted as performing this function, in other embodiments the coupling may include a plurality of vias, traces, etc. In various embodiments, the package substrates  120  may include one or more active or passive elements either positioned within the package substrates  120 , or coupled to the package substrates  120 . However, these extra elements are not depicted in  FIG. 1  for the sake of avoidance of clutter of the Figure. 
     As noted above, the dies  110   a  may include one or more active or passive elements. The active elements may be or include a singular or distributed processor, one or more cores of a distributed processor, a memory, etc. The processor may be, for example, a central processing unit (CPU), a graphics processing unit (GPU), or some other type of processor. The passive element may include or be a resistor, a capacitor, an inductor, etc. 
     The microelectronic packages  105  may also include one or more transceivers  115   a / 115   b  (collectively, transceivers  115 ). Generally, and as will be described in greater detail below, the transceivers  115  may be communicatively coupled with the dies  110  by one or more conductive elements such as trace  155 . Specifically, the transceivers  115  may be configured to receive an electronic signal from the die  110 , and then modulate, up-convert, or otherwise alter the electronic signal to a high-frequency electronic signal. The high-frequency electronic signal may have a frequency on the order of a mmWave-frequency, a THz-frequency, or higher. The transceiver  115  may then output the high-frequency electronic signal. Additionally or alternatively, a transceiver  115  may be configured to receive a high-frequency electronic signal and then de-modulate, down-convert, or otherwise alter the high-frequency electronic signal to a lower-frequency electronic signal which may then be output to a die  110 . 
     The trace  155  may be formed of a conductive material such as copper, and configured to convey one or more electronic signals between a die  110  and a transceiver  115 . Although only a single trace  155  is shown, it will be understood that in other embodiments a die  110  and a transceiver  115  may be communicatively coupled by a plurality of conductive elements such as one or more traces, vias, etc. In some embodiments the trace  155  may be positioned within the package substrate  120 , rather than on top of the package substrate  120  as shown. 
     One or both of the dies  110  and the transceivers  115  may be coupled with the package substrate  120  by one or more interconnects such as interconnects  130 . As depicted, the interconnects may be a solder ball or solder bump, and may be an element of, e.g., a ball grid array (BGA). However, in other embodiments, one or both of the dies  110  and the transceiver  115  may be coupled with the package substrate  120  by some other type of interconnect such as a socket, a mechanical coupling like a clamp, an element of a land grid array (LGA), a pin of a pin grid array (PGA), or some other type of interconnect. In some embodiments, an underfill  125  may be positioned between an element of the microelectronic packages  105  and the package substrate  120 . For example, as shown, the underfill  125  may be present between a die  110  and a package substrate  120 . The underfill  125  may help physically secure the die  110  to the package substrate, protect a face of the die  110 , or perform some other function. In embodiments, the underfill  125  may be or include epoxy, mold compound, or some other dielectric material with a relatively low-loss tangent such as may be dictated by use of high-frequency signals. Some specific materials of the underfill  125  may be or include silica-filled epoxides, ceramic filled epoxides, silica-filled imides, alumina filled organic matrix, etc. In other embodiments, the underfill  125  may not be present. 
     As can be seen, the microelectronic packages  105  may be coupled with a printed circuit board (PCB)  150 , for example by interconnects  135  which may be similar to, and share one or more characteristics of, interconnects  130 . For example, the interconnects  135  may be elements of a BGA, PGA, LGA, they may be a socket, they may be replaced by a clamp, etc. 
     Similarly to the package substrate  120 , the PCB  150  may be cored or coreless, and may include one or more layers of an organic or inorganic dielectric material such as build-up film, prepreg, FR4, or some other type of dielectric material. The PCB  150  may also have one or more conductive elements such as one or more traces, pads, vias, etc. either positioned on or within the PCB  150 . The PCB  150  may also include one or more active or passive elements positioned within or on the PCB  150 , however these extra elements may not be depicted in  FIG. 1  for the sake of clarity of the Figure and lack of clutter. 
     The PCB  150  may include a waveguide channel  145 . The waveguide channel  145  may be a dielectric waveguide, a coaxial waveguide, a rectangular waveguide, a substrate-integrated waveguide (SIW), or some other type of waveguide. Specifically, the waveguide may be configured to convey one or more high-frequency electromagnetic signals (e.g., electromagnetic signals with a frequency in the mmWave-frequency range, THz-frequency range, or above) between microelectronic packages  105   a  and  105   b . It will be understood that although the waveguide channel  145  is depicted as being in a topmost or outer portion of the PCB  150 , in some embodiments the waveguide channel  145  may be positioned within the PCB  150 , e.g., between two layers of the PCB  150 . Additionally, although only a single waveguide channel  145  is depicted in  FIG. 1 , in other embodiments the PCB  150  may include a plurality of waveguide channels that communicatively link microelectronic packages  105   a  and  105   b , or link one of the microelectronic packages  105  with a third microelectronic package that is not pictured in  FIG. 1 . In embodiments where a plurality of waveguide channels links two microelectronic packages, the plurality of waveguide channels may be referred to as a “waveguide bundle.” 
     The waveguide channel  145  may include one or more signal launchers  140 . The signal launchers  140  may be a radiative element such as an antenna, a plurality of opposing metal plates, or some other type of radiative element. The signal launchers  140  may be configured to receive a high-frequency electronic signal (e.g., from a transceiver such as transceiver  115 ) and convert the high-frequency electronic signal supported by package substrate  120  to a high-frequency electromagnetic signal supported by the waveguide  145  (or vice-versa). The signal launcher  140  may then output the high-frequency electromagnetic signal to the waveguide channel  145  so that the high-frequency electromagnetic signal may propagate through the waveguide channel  145 . 
     Generally, in operation, the electronic module  100  may operate as follows. The die  110   a  of microelectronic package  105   a  may generate an electronic signal that is transferred through trace  155  to transceiver  115   a . Transceiver  115   a  may modulate, up-convert, or otherwise alter the signal to a high-frequency electronic signal as described above, and output that high-frequency electronic signal. Specifically, in  FIG. 1 , the high-frequency electronic signal may be output through one of interconnects  130  to package substrate  120   a , and more specifically to via  160  of package substrate  120   a . The high-frequency electronic signal may propagate along the via  160 , through an interconnect  135 , and to signal launcher  140 . Signal launcher  140  may convert the high-frequency electronic signal to a high-frequency electromagnetic signal as described above, which then propagates through waveguide channel  145 . A corresponding signal launcher may receive the high-frequency electromagnetic signal and convert it to a high-frequency electronic signal which is output to microelectronic package  105   b , and more specifically to package substrate  120   b . The high-frequency electronic signal propagates to transceiver  115   b  where it is down-converted, demodulated, or otherwise altered to an electronic signal which is then provided to die  110   b.    
     It will be understood that the above-described signal path is only intended as one example of such a signal path, and other embodiments may have other signal paths. Additionally, although the signal path is only described as unidirectional, in other embodiments the signal path may additionally or alternatively propagate from microelectronic package  105   b  to microelectronic package  105   a . It will further be understood that various elements of a single microelectronic package (e.g., interconnects  130 ) which are depicted as similar to one another may vary in some embodiments. For example, the interconnects coupling the die  110  to the package substrate  120  may be different than the interconnects coupling the transceiver  115  to the package substrate  120 . Various elements between packages may likewise differ. For example, die  110   a  may be of a different type than die  110   b . Finally, in some embodiments the transceiver  115  and the die  110   a  may not be elements of the same microelectronic package, but rather they may be elements of separate microelectronic packages that are communicatively coupled with one another. Other elements may vary in other embodiments. 
       FIG. 2  depicts an alternative example electronic module  200  of an electronic device, in accordance with various embodiments herein. The electronic module  200  may include microelectronic packages  205 , which may be respectively similar to, and share one or more characteristics of, microelectronic packages  105 . Specifically, the microelectronic packages may include a package substrate  220 , which may be similar to, and share one or more characteristics of, package substrates  120 . The microelectronic packages  205  may be coupled with a PCB  250  that includes a waveguide channel  245  with one or more signal launchers  240 , which may be respectively similar to, and share one or more characteristics of, PCB  150 , waveguide channel  145 , and signal launchers  140 . 
     The microelectronic packages  205  may include a die  210  and a transceiver  215 , which may be similar to, and share one or more characteristics of, die  110  and transceiver  115 . However, as can be seen in  FIG. 2 , the die  210  and transceiver  215  may be a unitary chip. That is, in embodiments, the transceiver  215  may be an element of the die  210 . For example, the transceiver may be a logic, circuit, or some other element that is either integrated on or within the die  210 . 
       FIG. 3  depicts an alternative example electronic module  300  of an electronic device, in accordance with various embodiments herein. The electronic module  300  may include microelectronic packages  305  with dies  310 , transceivers  315 , and package substrates  320 , which may be respectively similar to, and share one or more characteristics of, microelectronic packages  205 , dies  210 , transceivers  215 , and package substrates  220 . The electronic module  300  may also include a PCB  350 , which may be similar to, and share one or more characteristics of, PCB  250 . 
     The electronic module  300  may also include a waveguide channel  345  and one or more waveguide connectors  355 . The waveguide channel  345 , as pictured, may be a flexible waveguide such as a dielectric waveguide. However, in other embodiments the waveguide channel  345  may be a different type of waveguide such as a coaxial cable. 
     The connectors  355  may be coupled to the PCB  350 , and the waveguide channel  345  may be positioned therebetween. As can be seen, the connectors  355  may be communicatively coupled with the microelectronic packages  305 . The connectors  355  may include a signal launcher similar to signal launchers  140  or  240 , and be configured to receive a high-frequency electronic signal from a microelectronic package  305 , convert it to a high-frequency electromagnetic signal, and launch the high-frequency electromagnetic signal into waveguide channel  345 . Additionally or alternatively, one of the connectors  355  may be configured to receive a high-frequency electromagnetic signal from waveguide channel  345 , convert it to a high-frequency electronic signal, and output the high-frequency electronic signal to a microelectronic package  305 . It will be noted that although the connectors  355  are depicted as coupled with the PCB  350 , in other embodiments the connectors  355  may be elements of, or other connected with, the package substrates  320  or the transceivers  315 . 
       FIG. 4  depicts an alternative example electronic module  400  of an electronic device, in accordance with various embodiments herein. In this embodiment, the electronic module  400  may include microelectronic packages  405  with dies  410 , transceivers  415 , and package substrates  420 , which may be respectively similar to, and share one or more characteristics of, microelectronic packages  105 , dies  110 , transceivers  115 , and package substrates  120 . 
     The electronic module  400  may also include a PCB  450  with connectors  455  and a waveguide channel  445 , which may be respectively similar to, and share one or more characteristics of, PCB  350 , connectors  355 , and waveguide channel  345 . 
       FIG. 5  depicts an alternative example electronic module  500  of an electronic device, in accordance with various embodiments herein. Generally, the high bandwidth density of the waveguide channel may result in a significant reduction of the die bumps required for high-speed signaling. This reduction may lead to the relaxation of the first level interconnect (FLI) bump pitch, which in turn may translate into the ability to implement multi-chip modules (MCM) with direct chip attach (DCA) to the substrate. This implementation may be used, for example, in the client or portable device space. An example of this implementation is depicted in  FIG. 5  with respect to electronic module  500 . 
     The electronic module  500  may include a PCB  550  with a waveguide channel  545  and signal launchers  540 , which may be respectively similar to, and share one or more characteristics of, PCB  150 , waveguide channel  145 , and signal launchers  140 . 
     The electronic module  500  may include microelectronic packages  505 , which may be generally similar to, and share one or more characteristics of, microelectronic packages  205 . However, as can be seen in  FIG. 5 , the microelectronic packages  505  may general comprise a die  510  and a transceiver  515  which may be directly coupled with the PCB  550 . The die  510  may be similar to, and share one or more characteristics of, die  210 . Similarly, transceiver  515  may be similar to, and share one or more characteristics of, transceiver  215 . 
     Specifically, as can be seen in  FIG. 5 , the die  510  and transceiver  515  may be coupled with the substrate by interconnects  530  which may be similar to, and share one or more characteristics of, interconnects  130 . Also, as can be seen in  FIG. 5 , the electronic module  500  may include an underfill  525  which may be similar to, and share one or more characteristics of, underfill  125 . It will be noted that although the die  510  and transceiver  515  are depicted as unitary, in some embodiments the die  510  may be physically separated from transceiver  515  in a fashion similar to die  110  and transceiver  115 . 
       FIG. 6  depicts an alternative example electronic module  600  of an electronic device, in accordance with various embodiments herein. As previously noted, in some embodiments the microelectronic package may be coupled with the substrate by a socket. Generally, the socket may keep the microelectronic package and a waveguide connector stable within the socket.  FIG. 6  depicts an example electronic module  600  with such a socket. 
     Generally, the electronic module  600  may include microelectronic packages  605  with dies  610 , transceivers  615 , and package substrates  620 , which may be respectively similar to, and share one or more characteristics with, microelectronic packages  105 , dies  110 , transceivers  115 , and package substrates  120 . The electronic module  600  may also have a PCB  650 , which may be similar to, and share one or more characteristics of, PCB  350 . 
     The electronic module  600  may also include one or more sockets  670 . The sockets  670  may generally be positioned between the microelectronic packages  605  and the PCB  650 . The sockets  670  may be coupled with the PCB  650 , for example by interconnects  675 . Interconnects  675  may be similar to, and share one or more characteristics with, interconnects  135 . The sockets  670  may also couple with the microelectronic packages by interconnects  680 , which may also be similar to, and share one or more characteristics with, interconnects  135 . Specifically, in some embodiments the sockets  670  may include one or more elements of a BGA, a PGA, an LGA, etc. In some embodiments, the socket may extend partially up the side of the microelectronic packages  605  and hold the microelectronic packages  605  in place. In some embodiments, the sockets  670  may include one or more elements that go over the top of the microelectronic packages  605  (as oriented in  FIG. 6 ) and hold the microelectronic packages  605  in place with a “clamp” type mechanism. 
     In some embodiments, the sockets  670  may include a connector  655 , which may be similar to, and share one or more characteristics with, connectors  455 . As shown, the connectors  655  may be elements of the socket  670 , however in other embodiments the connectors  655  may be external to, but physically or communicatively coupled with, sockets  670 . The connectors  655  may be coupled with a waveguide  645 , which may be similar to, and share one or more characteristics with, waveguide  445 . 
     It will be understood that the above-described embodiments of  FIGS. 1-6  are intended as examples of various embodiments, and depict various configurations of certain elements. However, in other embodiments certain elements may be in a different configuration. For example, in some embodiments the transceiver may be located within the package substrate, the socket, positioned on the socket, or positioned at a different side of the package substrate than depicted in various Figures. In some embodiments, the various signal launchers may be located on the die, package substrate, socket, etc. Additionally, it will be understood that although each and every element of  FIGS. 2-6  may not be specifically addressed, certain elements that appear similar to elements of  FIG. 1  may generally be understood to be similar to the elements of  FIG. 1  (e.g., the interconnects, the underfill, etc.). 
       FIG. 7  depicts an example technique for making an electronic module, in accordance with various embodiments herein. Generally, the technique may be described with respect to electronic module  100 , however it will be understood that the described technique may apply to some other circuit board described herein, or related to embodiments herein, with or without adaptation of the technique. 
     Generally, the technique may involve coupling, at  705 , a first die with a PCB. The die may be similar to, for example, die  110 , and the PCB may be similar to, for example, PCB  150 . In the embodiment of  FIG. 1 , the die may be coupled with the PCB as an element of a microelectronic package that is coupled with the PCB. However, in other embodiments the die may be similar to, for example, die  510  which is coupled directly with the PCB, or the die may be coupled to the PCB by a socket such as socket  670 . 
     The technique may then involve coupling, at  710 , a second die with the PCB. Similarly to the first die described above with respect to element  705 , the second die may either be coupled directly to the PCB, may be coupled to the PCB as an element of a microelectronic package, a socket may be used, etc. 
     The technique may then include communicatively coupling, at  715 , a waveguide channel with the first die and the second die. The waveguide channel may be similar to, for example, waveguide channel  145  or some other waveguide channel discussed herein. 
     It will be understood that the above-described technique is only one example technique, and other embodiments may have techniques with more or fewer elements. In some embodiments certain elements, e.g. elements  705  and  710 , may occur concurrently with one another, or in a different order. 
       FIG. 8  illustrates an example computing device  1500  suitable for use with various of the electronic modules such as electronic module  100 ,  200 ,  300 ,  400 ,  500 , or  600  (collectively, “electronic modules  100 - 600 ”), in accordance with various embodiments. Specifically, in some embodiments, the computing device  1500  may include one or more of electronic modules  100 - 600  therein. 
     As shown, computing device  1500  may include one or more processors or processor cores  1502  and system memory  1504 . For the purpose of this application, including the claims, the terms “processor” and “processor cores” may be considered synonymous, unless the context clearly requires otherwise. The processor  1502  may include any type of processors, such as a CPU, a microprocessor, and the like. The processor  1502  may be implemented as an integrated circuit having multi-cores, e.g., a multi-core microprocessor. The computing device  1500  may include mass storage devices  1506  (such as diskette, hard drive, volatile memory (e.g., DRAM, compact disc read-only memory (CD-ROM), digital versatile disk (DVD), and so forth)). In general, system memory  1504  and/or mass storage devices  1506  may be temporal and/or persistent storage of any type, including, but not limited to, volatile and non-volatile memory, optical, magnetic, and/or solid state mass storage, and so forth. Volatile memory may include, but is not limited to, static and/or DRAM. Non-volatile memory may include, but is not limited to, electrically erasable programmable read-only memory, phase change memory, resistive memory, and so forth. In some embodiments, one or both of the system memory  1504  or the mass storage device  1506  may include computational logic  1522 , which may be configured to implement or perform, in whole or in part, one or more instructions that may be stored in the system memory  1504  or the mass storage device  1506 . In other embodiments, the computational logic  1522  may be configured to perform a memory-related command such as a read or write command on the system memory  1504  or the mass storage device  1506 . 
     The computing device  1500  may further include input/output (I/O) devices  1508  (such as a display (e.g., a touchscreen display), keyboard, cursor control, remote control, gaming controller, image capture device, and so forth) and communication interfaces  1510  (such as network interface cards, modems, infrared receivers, radio receivers (e.g., Bluetooth), and so forth). 
     The communication interfaces  1510  may include communication chips (not shown) that may be configured to operate the device  1500  in accordance with a Global System for Mobile Communication (GSM), General Packet Radio Service (GPRS), Universal Mobile Telecommunications System (UMTS), High-Speed Packet Access (HSPA), Evolved HSPA (E-HSPA), or Long-Term Evolution (LTE) network. The communication chips may also be configured to operate in accordance with Enhanced Data for GSM Evolution (EDGE), GSM EDGE Radio Access Network (GERAN), Universal Terrestrial Radio Access Network (UTRAN), or Evolved UTRAN (E-UTRAN). The communication chips may be configured to operate in accordance with Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Digital Enhanced Cordless Telecommunications (DECT), Evolution-Data Optimized (EV-DO), derivatives thereof, as well as any other wireless protocols that are designated as 3G, 4G, 5G, and beyond. The communication interfaces  1510  may operate in accordance with other wireless protocols in other embodiments. 
     The computing device  1500  may further include or be coupled with a power supply. The power supply may, for example, be a power supply that is internal to the computing device  1500  such as a battery. In other embodiments the power supply may be external to the computing device  1500 . For example, the power supply may be an electrical source such as an electrical outlet, an external battery, or some other type of power supply. The power supply may be, for example alternating current (AC), direct current (DC) or some other type of power supply. The power supply may in some embodiments include one or more additional components such as an AC to DC convertor, one or more downconverters, one or more upconverters, transistors, resistors, capacitors, etc. that may be used, for example, to tune or alter the current or voltage of the power supply from one level to another level. In some embodiments the power supply may be configured to provide power to the computing device  1500  or one or more discrete components of the computing device  1500  such as the processor(s)  1502 , mass storage  1506 , I/O devices  1508 , etc. 
     The above-described computing device  1500  elements may be coupled to each other via system bus  1512 , which may represent one or more buses. In the case of multiple buses, they may be bridged by one or more bus bridges (not shown). Each of these elements may perform its conventional functions known in the art. The various elements may be implemented by assembler instructions supported by processor(s)  1502  or high-level languages that may be compiled into such instructions. 
     The permanent copy of the programming instructions may be placed into mass storage devices  1506  in the factory, or in the field, through, for example, a distribution medium (not shown), such as a compact disc (CD), or through communication interface  1510  (from a distribution server (not shown)). That is, one or more distribution media having an implementation of the agent program may be employed to distribute the agent and to program various computing devices. 
     The number, capability, and/or capacity of the elements  1508 ,  1510 ,  1512  may vary, depending on whether computing device  1500  is used as a stationary computing device, such as a set-top box or desktop computer, or a mobile computing device, such as a tablet computing device, laptop computer, game console, or smartphone. Their constitutions are otherwise known, and accordingly will not be further described. 
     In various implementations, the computing device  1500  may comprise one or more components of a data center, a laptop, a netbook, a notebook, an ultrabook, a smartphone, a tablet, a personal digital assistant (PDA), an ultra mobile PC, a mobile phone, or a digital camera. In further implementations, the computing device  1500  may be any other electronic device that processes data. 
     In some embodiments, as noted above, computing device  1500  may include one or more of electronic modules  100 - 600 . For example, in some embodiments the processor  1502 , memory  1504 , or some other component of the computing device  1500  may be one of the various dies  110 ,  210 ,  310 , etc. 
     EXAMPLES OF VARIOUS EMBODIMENTS 
     Example 1 includes a electronic module for use in an electronic device, the electronic module comprising: a printed circuit board (PCB); a first die coupled with the PCB; a second die coupled with the PCB; and a waveguide channel communicatively coupled with the first die and the second die, wherein the waveguide channel is to convey an electromagnetic signal from the first die to the second die, and wherein the electromagnetic signal has a frequency greater than 30 gigahertz (GHz). 
     Example 2 includes the electronic module of example 1, wherein the electromagnetic signal has a frequency greater than 300 GHz. 
     Example 3 includes the electronic module of example 1, wherein the PCB comprises a plurality of layers, and wherein the waveguide channel is an element of a layer of the plurality of layers of the PCB. 
     Example 4 includes the electronic module of example 1, wherein the waveguide channel includes a waveguide connector that is coupled with the PCB. 
     Example 5 includes the electronic module of any of examples 1-4, wherein the first die is an element of a microelectronic package that further includes a high-frequency transceiver that is to up-convert an electronic signal from a logic component of the first die to an electronic signal with a frequency greater than 30 GHz. 
     Example 6 includes the electronic module of example 5, wherein the high-frequency transceiver is an element of the first die. 
     Example 7 includes the electronic module of example 5, wherein the high-frequency transceiver is communicatively coupled with the first die. 
     Example 8 includes the electronic module of example 5, wherein the microelectronic package includes a package substrate physically coupled with the first die and the PCB. 
     Example 9 includes the electronic module of example 5, wherein the PCB further includes a signal launcher that is to convert the electronic signal with the frequency greater than 30 GHz to the electromagnetic signal. 
     Example 10 includes the electronic module of any of examples 1-4, wherein the waveguide channel is physically coupled with a socket that communicatively or physically couples the first die with the PCB. 
     Example 11 includes the electronic module of any of examples 1-4, wherein the first die is directly coupled with the PCB. 
     Example 12 includes a method of forming an electronic module for use in an electronic device, wherein the method comprises: coupling a first die with a printed circuit board (PCB); coupling a second die with the PCB; and communicatively coupling a waveguide channel with the first die and the second die, wherein the waveguide channel is to convey an electromagnetic signal with a frequency greater than 30 gigahertz (GHz) between the first die and the second die. 
     Example 13 includes the method of example 12, wherein the electromagnetic signal has a frequency greater than 300 GHz. 
     Example 14 includes the method of examples 12 or 13, wherein coupling the first die with the PCB includes coupling a microelectronic package to the PCB, wherein the microelectronic package includes a package substrate, the first die, and a high-frequency transceiver element that is to receive an electronic signal from a logic of the first die and up-convert the electronic signal to an electronic signal with a frequency greater than 30 GHz. 
     Example 15 includes the method of examples 12 or 13, wherein the waveguide channel is an element of a layer of the PCB and communicatively coupling the waveguide channel with the first die includes communicatively coupling the first die with a signal launcher of the PCB, wherein the signal launcher is to receive an electronic signal related to a signal generated by the first die and convert the electronic signal to the electromagnetic signal. 
     Example 16 includes the method of examples 12 or 13, further comprising coupling the waveguide channel to the PCB. 
     Example 17 includes an electronic device comprising: a memory; and a motherboard coupled with the memory, wherein the motherboard includes: a first computing component coupled with the motherboard, wherein the first computing component includes a first die and a first transceiver, wherein the first transceiver is to: receive a first electronic signal from the first die; and up-convert the first electronic signal to a second electronic signal with a frequency greater than 30 gigahertz (GHz); a waveguide channel that is communicatively coupled with the first transceiver, wherein the waveguide channel is to receive and convey an electromagnetic signal with a frequency greater than 30 GHz, wherein the electromagnetic signal is based on the second electronic signal; and a second computing component coupled with the motherboard, wherein the second computing component includes a second die and a second transceiver, wherein the second transceiver is to: receive a third electronic signal that is related to the electromagnetic signal, wherein the third electronic signal has a frequency greater than 30 GHz; down-convert the third electronic signal to a fourth electronic signal; and provide the fourth electronic signal to the second die. 
     Example 18 includes the electronic device of example 17, wherein the second electronic signal has a frequency greater than 300 GHz. 
     Example 19 includes the electronic device of examples 17 or 18, wherein the second transceiver is an element of the second die. 
     Example 20 includes the electronic device of examples 17 or 18, wherein the second computing component is a microelectronic package that includes a package substrate physically coupled with the motherboard, the second die, and the second transceiver. 
     Various embodiments may include any suitable combination of the above-described embodiments including alternative (or) embodiments of embodiments that are described in conjunctive form (and) above (e.g., the “and” may be “and/or”). Furthermore, some embodiments may include one or more articles of manufacture (e.g., non-transitory computer-readable media) having instructions, stored thereon, that when executed result in actions of any of the above-described embodiments. Moreover, some embodiments may include apparatuses or systems having any suitable means for carrying out the various operations of the above-described embodiments. 
     The above description of illustrated embodiments, including what is described in the Abstract, is not intended to be exhaustive or limiting as to the precise forms disclosed. While specific implementations of, and examples for, various embodiments or concepts are described herein for illustrative purposes, various equivalent modifications may be possible, as those skilled in the relevant art will recognize. These modifications may be made in light of the above detailed description, the Abstract, the Figures, or the claims.