PATENT DOCUMENT

Publication Number: US-8493749-B2
Application Number: US-77777510-A
Country: US
Kind Code: B2

Title: Conforming EMI shielding

Abstract:
This is directed to an EMI shield constructed from a conformal coating. A circuit board can include electronic components for which EMI shielding is required. To provide such shielding in a space-efficient manner, a first non-conductive conformal coating can be placed over the circuit board and the electronic components. A second conductive conformal coating can then be placed over the first such that at least portions of the second coating around the periphery of the electronic components are electrically coupled to the circuit board.

Claims:
What is claimed is: 
     
       1. An electronic device, comprising:
 a circuit board comprising a plurality of contact pads; 
 at least one component coupled to the circuit board requiring EMI shielding, wherein the plurality of contact pads are positioned around a periphery of the at least one component; 
 a first preformed non-conductive conformal sheet placed over the circuit board and the at least one component, the first preformed non-conductive conformal sheet comprising a plurality of openings, each opening corresponding to one contact pad of the plurality of contact pads and being substantially perpendicular to the corresponding contact pad when the first preformed non-conductive conformal sheet is placed over the circuit board and the at least one component; and 
 a second preformed conformal sheet placed over the first preformed conformal sheet, the second preformed conformal sheet constructed from a conductive material and at least partially grounded to the circuit board. 
 
     
     
       2. The electronic device of  claim 1 , wherein:
 the second preformed conformal sheet is electrically connected to the plurality of contact pads. 
 
     
     
       3. The electronic device of  claim 2 , wherein:
 the second preformed conductive sheet is electrically connected to the plurality of contact pads through the each corresponding opening of the plurality of openings of the first preformed non-conductive conformal sheet. 
 
     
     
       4. The electronic device of  claim 2 , wherein the second preformed conformal sheet is electrically connected to the each conductive pad of the plurality of contact pads by at least one of:
 soldering; 
 surface mount technology; 
 a conductive adhesive; and 
 a mechanical connector. 
 
     
     
       5. The electronic device of  claim 1 , wherein:
 the at least one component comprises a plurality of sides; and 
 the second preformed conformal sheet is partially grounded to the circuit board along at least two of the plurality of sides. 
 
     
     
       6. The electronic device of  claim 5 , wherein:
 the second preformed conformal sheet is grounded to the circuit board along each of the plurality of sides of the component. 
 
     
     
       7. The electronic device of  claim 1 , wherein:
 the first preformed non-conductive conformal sheet covers the entirety of the at least one component. 
 
     
     
       8. The electronic device of  claim 1 , wherein:
 the plurality of contact pads comprise a substantially rectangular shape; and 
 the plurality of openings comprise a substantially rectangular shape, such that the intersection of the contact pads and the openings substantially forms a criss-cross pattern. 
 
     
     
       9. A method for shielding an electronic device component from electromagnetic interference, comprising:
 coupling the electronic device component to a circuit board; 
 forming a non-conductive conformal sheet comprising:
 at least one opening; and 
 at least one intermediate coating; 
 
 applying the formed non-conductive conformal sheet over the electronic device component such that the at least one opening and the at least one intermediate coating are placed over at least one contact pad of the circuit board; 
 forming a conductive conformal sheet; 
 removing the at least one intermediate coating after applying the formed non-conductive sheet; and 
 applying the formed conductive conformal sheet over the formed non-conductive conformal sheet, component, and circuit board, wherein at least one portion of the formed conductive conformal sheet is grounded to the circuit board. 
 
     
     
       10. The method of  claim 9 , wherein:
 the at least one portion of the formed conductive conformal sheet is grounded to a region adjacent to an interface between the component and the circuit board. 
 
     
     
       11. The method of  claim 9 , further comprising:
 electrically connecting the formed conductive conformal sheet to the at least one conductive pad via the at least one opening. 
 
     
     
       12. An electromagnetic interference shield, comprising:
 a first preformed sheet of non-conductive material comprising:
 at least one opening; and 
 a first fiducial, the first preformed sheet being coupled to a top surface of an electronic device component, the electronic device component comprising a second fiducial that is operably aligned with the first fiducial; 
 
 a second preformed sheet of conductive material coupled to the first preformed sheet; and 
 a connection interface for electrically connecting the second sheet to a contact pad of a circuit board via the at least one opening of the first preformed sheet. 
 
     
     
       13. The electromagnetic interference shield of  claim 12 , wherein at least one of the first sheet and the second sheet is applied using at least one of:
 an adhesive; and 
 a heat process. 
 
     
     
       14. The electromagnetic interference shield of  claim 12 , wherein the connection interface comprises at least one of:
 solder; 
 surface mount technology; 
 a conductive adhesive; and 
 a mechanical fastener. 
 
     
     
       15. The electronic device of  claim 1 , wherein:
 the first preformed non-conductive conformal sheet is coupled to the at least one component via at least one of an adhesive and heat shrinking. 
 
     
     
       16. The electronic device of  claim 1 , wherein:
 a top surface of the at least one component comprises a first fiducial; and 
 the first preformed non-conductive conformal sheet comprises a second fiducial, the first and second fiducials being aligned when the first preformed non-conductive conformal sheet is placed over the at least one component. 
 
     
     
       17. The electronic device of  claim 16 , wherein:
 the second preformed conformal sheet comprises a third fiducial, the first, second, and third fiducials being aligned when the second preformed conformal sheet is placed over the first preformed non-conductive conformal sheet. 
 
     
     
       18. The method of  claim 11 , wherein the at least one opening comprises a plurality of openings and the at least one contact pad comprises a plurality of contact pads. 
     
     
       19. The method of  claim 18 , wherein each opening of the plurality of openings is substantially perpendicular to a corresponding contact pad of the plurality of contact pads. 
     
     
       20. The method of  claim 9 , wherein the intermediate coating comprises at least one of Teflon and polyethylene. 
     
     
       21. The method of  claim 9 , wherein removing the at least one intermediate coating is performed via at least one of lasers and etching. 
     
     
       22. The electromagnetic interference shield of  claim 12 , wherein:
 the second sheet comprising a third fiducial, the first, second, and third fiducials being operably aligned when the second sheet is coupled to the first sheet.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to previously filed U.S. Provisional Patent Application No. 61/250,767, filed Oct. 12, 2009, entitled “CONFORMING EMI SHIELDING,” which is incorporated by reference herein in its entirety. 
    
    
     BACKGROUND 
     This is directed to using conformal coating to provide electromagnetic interference (EMI) shielding for components of an electronic device. In particular, this is directed to an EMI shield constructed from a conformal coating applied to a circuit board. 
     A portable electronic device can include several components coupled to a circuit board for providing processing and other device operations. Some of the components can generate electromagnetic waves that interfere with the operation of other components of the device. For example, circuitry associated with connecting to a communications network can interfere with other device components (e.g., sensor arrays). To protect the components from such interference, different approaches can be used. In one embodiment a conductive can shielding can be constructed around the components. For example, a frame can be soldered around the periphery of the components, and a cover can be attached to the frame. 
     The frame and cover approach, however, may require two distinct components, constructed from sheets of conductive material (e.g., from sheet metal) added to the circuit board supporting the electronic device components. This can in turn require additional space within the device for the EMI shield, which may place a limit on the device size. 
     SUMMARY OF THE INVENTION 
     This is directed to using a conformal coating for providing EMI shielding within an electronic device. In particular, this is directed to applying consecutive sheets of conformal coating over components of an electronic device circuit board to provide both a water-resistant coating and an EMI shield. 
     An electronic device can include at least one circuit board on which one or more components can be mounted. The board can be treated with a conformal coating, which provides a substantially continuous layer of material around the board and the components. The conformal coating can be constructed using any suitable non-conductive material such that contaminate is substantially prevented from leaking through the coating and shorting the electronic device components. 
     To provide EMI shielding to the device components, a second layer of conforming material can be applied to the circuit board. The material used for the second layer can be a conductive material, which can prevent electromagnetic waves from propagating from one component to another. The second layer can be electrically coupled to the circuit board to provide grounding. In particular, the second layer can be coupled to conductive pads of the circuit board through openings or apertures of the first (non-conductive) layer. 
     The electronic device can ensure that the conductive coating remains electrically coupled to the circuit board conductive pads using any suitable approach. In some embodiments, the non-conductive coating can include openings shaped in a manner to ensure that at least a minimum surface area of conductive pad remains exposed (e.g., via a criss-cross pattern). In some embodiments, the electronic device can include a mechanical engaging mechanism or other fastening component for ensuring that the conductive layer remains in contact with the contact pads. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other features of the present invention, its nature and various advantages will be more apparent upon consideration of the following detailed description, taken in conjunction with the accompanying drawings in which: 
         FIG. 1  is a schematic view of an illustrative electronic device in accordance with one embodiment of the invention; 
         FIG. 2  is a cross-sectional view of an illustrative EMI frame and can coupled to a circuit board; 
         FIG. 3  is a cross-sectional view of an illustrative conforming coating EMI shield used with a circuit board in accordance with one embodiment of the invention; 
         FIG. 4  is an exploded view of a conforming coating EMI shield applied to a circuit board in accordance with one embodiment of the invention; 
         FIG. 5  is a schematic view of a portion of the assembled confirming coating EMI shield and circuit board of  FIG. 4  in accordance with one embodiment of the invention; 
         FIG. 6  is a cross-sectional view of an illustrative conforming coating EMI shield from which a portion of non-conductive coating is removed in accordance with one embodiment of the invention; 
         FIG. 7  is a cross-sectional view of an illustrative conforming coating EMI shield coupled to a circuit board using a mechanical fastener in accordance with one embodiment of the invention; and 
         FIG. 8  is a flowchart of an illustrative process for providing a conformal coating EMI shield in accordance with one embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION 
     An electronic device can include components for which EMI shielding is required. To provide appropriate EMI shielding while limiting the amount of space required for the shield, the electronic device can include a conformal coating layer constructed from conductive material. The conductive conformal coating can be electrically coupled to one or more pads on the circuit board (e.g., around the periphery of the device components) to ensure that the conductive coating, which serves as an EMI shield, is grounded. The electronic device can include an intermediate non-conductive coating between the electronic device components and the conductive conformal coating layer to ensure that the conductive layer does not short the electronic device components. In some embodiments, the non-conductive layer can include openings in the layer to allow the conductive layer to be electrically coupled to the circuit board. 
       FIG. 1  is a schematic view of an electronic device in accordance with one embodiment of the invention. Electronic device  100  can include housing  110 , bezel  112 , and window  120 . Bezel  112  can be coupled to housing  110  in a manner to secure window  120  to the bezel. Housing  110  and bezel  112  can be constructed from any suitable material, including for example plastic, metal, or a composite material. In one implementation, housing  110  can be constructed from plastic or any metal such as aluminum, and bezel  112  can be constructed from any metal such as stainless steel. Window  120  can be constructed from any suitable transparent or translucent material, including for example glass or plastic. Different electronic device components can be retained within electronic device  100  to provide different functionality to the user. In some embodiments, electronic device  100  can include components that generate electromagnetic waves that may interfere with the proper operation of other electronic device components. Those components may then need to be shielded to ensure proper operation of the electronic device. 
     The electronic device can provide EMI shielding using any suitable approach. In some embodiments, the electronic device can include a frame extending from the surface of a circuit board over which a cover can be releasably coupled.  FIG. 2  is a cross-sectional view of an illustrative EMI frame and can coupled to a circuit board. Electronic device  200  can include circuit board  202  to which components  210  and  212  are coupled. Although  FIG. 2  only shows two components, it will be understood that any suitable number or type of components can be coupled to the circuit board. To protect components  210  and  212  from EMI caused by other components, conductive shields  220  and  221  can be constructed around the components. Shield  220  can include frame  222 , which can include a wall placed substantially around the periphery of the component (e.g., component  210 ), and over which cover  224  can be placed and electrically connected (e.g., by contact if both frame  222  and cover  224  are conductive). Frame  222  can be electrically connected to the circuit board via conductive pads  204  and  206  extending at least partially around the periphery of the component (and pad  208  for shield  221 ). Frame  222  can be mounted using any suitable approach, including for example soldering and SMT. To completely enclose the component and prevent electromagnetic waves from leaking, cover  224  can be placed over frame  222  such that small or no gaps exist between the frame and cover. This approach, however, requires additional components within the device and thus limits the size of the device. 
     In some embodiments, the electronic device can instead include a conforming coating or cover for providing EMI shielding.  FIG. 3  is a cross-sectional view of an illustrative conforming coating EMI shield used with a circuit board in accordance with one embodiment of the invention. Electronic device  300  can include circuit board  302  on which electronic components  310  and  312  can be mounted. To provide waterproofing or water resistance, as well as resistance to other contaminates, to the circuit board and components (e.g., to prevent water from shorting the circuit board), conformal coating  320  can be applied to the surface of the board. Conformal coating  320  can include any suitable material, including for example a non-conductive material (e.g., a patterned acrylic sealing adhesive). 
     To provide EMI shielding, as well as additional contaminate resistance, a second conductive conformal coating  330  can be applied to the circuit board over the first conformal coating. Coating  330  can be constructed from any suitable conductive material (e.g., conductive sealing adhesive), including for example an aluminum sheet or other metallic layer. The coatings can be applied to the circuit board using any suitable process, including for example an adhesive (e.g., a pressure sensitive adhesive), heat process (e.g., heat shrink), sputter, physical vapor deposition (PVD), or any other process for deposing a layer of material on the circuit board. Although only two coatings are shown in the example of  FIG. 3 , it will be understood that any suitable number of coatings (conductive or not) can be applied to the circuit board over the components. In some embodiments, coating  320  can instead or in addition include a non-conductive material placed between the component and the circuit board to prevent undesired shorting (if required). 
     To ensure that coating  330  provides sufficient EMI shielding, coating  330  can be electrically coupled to contact pads  304  and  306  of circuit board  302 . Coating  320  can include opening  322  through which coating  330  can extend and come into contact with pads  304  and  306 . Opening  322  can have any suitable shape or size. For example, opening  322  can have a substantially rectangular shape, such that the width of the rectangle is at least a minimum width for ensuring sufficient surface area is exposed for coupling with conductive coating  330 . Contact pads  304  and  306 , and openings  322  in coating  320  can be distributed along circuit board  302  in any suitable configuration. In some embodiments, contact pads  304  and  306  can form a substantially continuous contact surface around the periphery of the device components (e.g., component  310 ). Alternatively, a particular number of contact pads (e.g., pads  304  and  306 ) can be distributed around the periphery of the device component. The contact pads can be distributed in any suitable pattern or distribution, including for example evenly around the periphery or with varying distances between adjacent pads. Openings  322  can similarly be distributed in any suitable configuration, including for example in a configuration substantially corresponding to the configuration of the contact pads. 
       FIG. 4  is an exploded view of a conforming coating EMI shield applied to a circuit board in accordance with one embodiment of the invention. Assembly  400  can include circuit board  402 , non-conductive coating  420 , and conductive EMI shielding coating  430 . Circuit board  402  can include components  410  and  412  mounted on the circuit board. To ensure that conductive coating  430  is properly connected to the circuit board, thus ensuring that coating  430  is grounded and can shield components  410  and  412 , circuit board  402  can include contact pads  404  positioned around the periphery of each component  410  and  412 . The contact pads can form a continuous pad around the periphery of the components, or can instead or in addition for a series of discreet pads around the periphery of each component. In some embodiments, circuit board  402  can include distinct series of contact pads  404  around each component (e.g., around components  410  and  412 ), or circuit board  402  can instead or in addition include at least some contact pads  404  that form a shared boundary between two components (e.g., the contact pads between components  410  and  412 ). The particular configuration of contact pads can depend, in some cases, on the number of distinct conductive conformal coatings applied to the circuit board for EMI shielding (e.g., apply distinct coatings that do not contact each other for different sets of electronic device components). In some embodiments, contact pads  404  can be positioned along an edge  403  of circuit board  402  (e.g., to further reduce the space required for shielding device components). 
     Coating  420  can be formed from any non-conductive material, and include some or all of the features of coating  320  ( FIG. 3 ). Coating  420  can include openings  422  and  424  defining a periphery. The size and placement of openings  422  and  424  can be selected such that when coating  420  is placed on circuit board  402  and coupled to the circuit board (e.g., via an adhesive or heat shrinking), each or almost each opening  422  and  424  may be placed over at least a portion of a contact pad  404 . In some embodiments, one or more of openings  422  and  424  can be placed such that the openings align with a contact pad  404  placed on the edge  403  of circuit board  402 . To assist in the alignment of coating  420  with the circuit board, coating  420  can include targets or fiducials  426  to align with corresponding targets or fiducials  416  of circuit board  402  (e.g., placed on the surface of components  410  and  412 ). 
     Conductive coating  430 , which can provide EMI shielding for components  410  and  412 , can include some or all of the features of conductive coating  330  ( FIG. 3 ). Conductive coating  430  can be applied over coating  420  such that at least portions of coating  430  can be placed in contact with contact pads  404 . In some embodiments, conductive coating  430  can provide individual EMI shielding for each component of circuit board  402  (e.g., with distinct, electrically isolated coatings), or can instead or in addition provide shielding for a subset of components. Conductive coating  430  may be prevented from coming into contact with components  410  and  412  by non-conductive coating  420 , which can ensure that conductive coating  430  does not short the components. 
       FIG. 5  is a schematic view of a portion of the assembled confirming coating EMI shield and circuit board of  FIG. 4  in accordance with one embodiment of the invention. Assembly  500  can include circuit board  402  over which a non-conductive coating (not visible) and conductive coating  430  are applied. The non-conductive coating can include openings  422  and  424  having different orientations. In particular, openings  422  and  424  can include rectangular openings oriented such that the short end of the rectangle is substantially parallel to the component periphery. Circuit board  402  can include corresponding rectangular pads  404  oriented substantially perpendicular to openings  422  and  424  (e.g., the long end of the rectangular pad is substantially parallel to the component periphery). The resulting assembly can include substantially cross-shaped or criss-crossing interfaces between the contact pads and the non-conductive coating, where only the intersection of the contact pads and the openings are exposed for conductive coating  430 . This can ensure that at least a minimum surface area defined by the rectangle having the short end of each of the contact pad and opening will be exposed for conductive coating  430  to connect to the contact pads (e.g., a minimum surface for keeping coating  430  coupled to pads  404 ). In particular, this can provide substantial play or tolerances for aligning and assembling the non-conductive contact sheet to the circuit board while ensuring that the contact pads remain sufficiently exposed, as the application of the coating, and in particular the adhering of the coating to the circuit board, may be difficult to control precisely. Although the shapes used in  FIGS. 4 and 5  for the openings and contact pads are rectangles, it will be understood that any other shape could be used, in particular any shape by which a minimum contact area can be easily provided. 
     In some embodiments, the combination of the non-conductive and conductive conformal coatings can provide enhanced thermal dissipation. In particular, because the coatings extend over some or all of the circuit board, heat generated by the circuit board components can be distributed and directed by the coating to dissipate evenly on all areas of the circuit board via thermal conduction. This can avoid localized peaks in heat on the board, and thus reduce the operating temperature of the device. In some embodiments, one or both of the conformal coating layers can be made of an asymmetrically thermal conductive material (e.g., graphite in the conductive layer) such that heat can be directed to a particular location on the circuit board. In particular, this approach can be used to direct heat away from heat-generating components or heat-sensitive components (e.g., away from processors or sensors), or used to direct heat to a heat sink or other component for removing heat from the device. In some embodiments, this approach can be used to direct heat to a secondary power source, or to an internal mechanism for storing usable energy from the dissipated heat. 
     The conductive coating must be electrically coupled to the circuit board for it to provide acceptable EMI shielding. Because the non-conductive coating is placed between the conductive coating and the circuit board, the non-conductive coating may require an opening adjacent to the contact pads of the circuit board. The opening can be created using any suitable approach. In some embodiment, the non-conductive coating can be provided with existing openings, as described above in the context of  FIGS. 4 and 5 . In some embodiments, the opening can be created once the non-conductive coating has been applied to the circuit board and covers the contact pads. Any suitable approach can be used to create the opening in the non-conductive coating while retaining the contaminate-resistant or waterproof seal of the coating with the circuit board. For example, a laser ablation process or other related process can be used to selectively remove portions of the non-conductive housing. The laser size and intensity can be selected to burn away only the required portions of the non-conductive coating without damaging the contact pad or damaging the interface between the coating and the circuit board. 
       FIG. 6  is a cross-sectional view of an illustrative conforming coating EMI shield from which a portion of non-conductive coating is removed in accordance with one embodiment of the invention. Assembly  600  can include circuit board  602  over which non-conductive coating  620  and conductive coating  630  can be placed. Circuit board  602  can include conductive pad  604  to be placed in contact with conductive coating  630 . To ensure that the portion of non-conductive coating  620  overlaid on contact pad  604  is removed, an intermediate coating  622  can be placed over contact pad  604  before non-conductive coating  620  is placed on circuit board  602 . Intermediate coating  622  can be formed from any suitable material, including for example Teflon or polyethylene. Once the non-conductive coating has been overlaid on the circuit board and cured (if necessary), intermediate coating  622  can be removed (e.g., via laser or etching) to remove both the intermediate coating  622  and the portion of non-conductive layer  620  over contact pad  604 . When conductive layer  630  is later positioned over non-conductive layer  620 , conductive layer  630  can be in electrical contact with contact pad  604 . 
     As another example, a photolithography or other related process of the type can be used. A mask can be placed over the non-conductive coating such that the mask includes a opening to align with the contact pads of the circuit board. Once the mask placed, the circuit board and mask can be etched or exposed to particular light or chemicals to remove the unmasked portions of the non-conductive coating. Although a few approaches for creating the opening in the coating were described above, it will be understood that any other suitable approach can be used instead of or in addition to those described. 
     The conductive coating can be electrically coupled to the contact pads of the circuit board using any suitable approach. In some embodiments, the conductive coating can be secured to the contact pads using an adhesive (e.g., the adhesive of the conductive coating). Alternatively, an electrically conductive coupling can be used (e.g., SMT or soldering). As still another example, a mechanical fastener can be used.  FIG. 7  is a cross-sectional view of an illustrative conforming coating EMI shield coupled to a circuit board using a mechanical fastener in accordance with one embodiment of the invention. Assembly  700  can include circuit board  702  over which non-conductive coating  720  and conductive coating  730  can be placed. Circuit board  702  can include conductive pad  704  to be placed in contact with conductive coating  730 . To ensure that conductive coating remains in contact with contact pad  704 , assembly  700  can include fastener  710  serving as a connection interface for retaining the conductive coating. Fastener  710  can include at least one conductive portion for providing a conductive path between the coating and pad, or alternative can include non-conductive portions securing the coating and pad together. Fastener  710  can be coupled to circuit board  702  using any suitable approach, including for example SMT, soldering, an adhesive, a snap, or a mechanical fastener. 
       FIG. 8  is a flowchart of an illustrative process for providing a conformal coating EMI shield in accordance with one embodiment of the invention. Process  800  can begin at step  802 . At step  804 , a first conformal layer can be placed on a circuit board. The first conformal coating or layer can be secured to the circuit board to provide a substantially water resistant seal. The first conformal coating can be constructed from a non-conductive material to ensure that components coupled to the circuit board are not shorted. At step  806 , a second conformal coating or layer can be secured to the circuit board over the first coating. The second coating can be constructed from a conductive material to serve as an EMI shield. In some embodiments, an additional step can occur between steps  804  and  806  to expose contact pads to be electrically coupled to the second coating. For example, a mask can be removed, or another process for selectively removing the first coating can occur. At step  808 , the second conformal coating can be electrically coupled to the circuit board through the first coating. For example, one or more openings (e.g., around the periphery of one or more components) can be created in the first conformal coating (e.g., using a laser or etching) through which the second coating can contact the circuit board (e.g., contact pads of the circuit board). As another example, the first coating can be generated with existing openings that are aligned with corresponding contact pads of the circuit board. In some embodiments, step  808  can be skipped (e.g., when the contact pads are previously exposed prior to applying the second conformal coating). Process  800  can then end at step  810 . 
     The previously described embodiments are presented for purposes of illustration and not of limitation. It is understood that one or more features of an embodiment can be combined with one or more features of another embodiment to provide systems and/or methods without deviating from the spirit and scope of the invention. The present invention is limited only by the claims which follow.

Metadata:
Filing Date: 20100511
Publication Date: 20130723
Grant Date: 20130723
Priority Date: 20091012
Inventors: MYERS SCOTT
WEBER DOUGLAS
Assignee: APPLE INC
CPC Classifications: [{"code": "H05K3/284", "inventive": true, "first": true, "tree": "[]"}, {"code": "H05K3/284", "inventive": true, "first": true, "tree": "[]"}, {"code": "H05K1/0218", "inventive": false, "first": false, "tree": "[]"}, {"code": "H05K9/0024", "inventive": true, "first": false, "tree": "[]"}, {"code": "H05K2201/09872", "inventive": false, "first": false, "tree": "[]"}, {"code": "H05K2203/1311", "inventive": false, "first": false, "tree": "[]"}, {"code": "Y10T29/49146", "inventive": false, "first": false, "tree": "[]"}, {"code": "Y10T29/49146", "inventive": false, "first": false, "tree": "[]"}, {"code": "H05K9/0024", "inventive": true, "first": false, "tree": "[]"}, {"code": "H05K1/0218", "inventive": false, "first": false, "tree": "[]"}, {"code": "H05K2203/1311", "inventive": false, "first": false, "tree": "[]"}, {"code": "H05K2201/09872", "inventive": false, "first": false, "tree": "[]"}]
Family ID: 43854701