PATENT DOCUMENT

Publication Number: US-8808483-B2
Application Number: US-94050010-A
Country: US
Kind Code: B2

Title: Method of making a curved touch panel

Abstract:
A method of forming a curved touch surface is disclosed. According to an embodiment, the method includes depositing a touch sensor pattern on a flexible substrate; and curving the flexible substrate, using a chuck surface supporting the flexible substrate, to conform to a shape of a curved cover surface. Then, the curved flexible substrate can be laminated or otherwise adhered to the cover surface. The flexible substrate can be a glass substrate greater than 200 μm in thickness, and can be reduced to a desired thickness below 200 μm after the touch sensor pattern is deposited thereon. The flexible substrate can be curved by supporting the flexible substrate on the chuck surface such that the flexible substrate conforms to a shape of the chuck surface, or forcing the flexible substrate against the cover surface, such that the flexible substrate conforms to the shape of the curved cover surface.

Claims:
What is claimed is: 
     
       1. A method of forming a curved touch surface, comprising:
 depositing a touch sensor pattern on a flexible substrate; 
 curving the flexible substrate, using a chuck surface supporting the flexible substrate, to conform to a shape of a curved cover surface; and 
 laminating the curved flexible substrate to an interior side of the cover surface, wherein the curving, comprises:
 supporting the flexible substrate on the chuck surface such that the flexible substrate conforms to a shape of the chuck surface, wherein the chuck surface has a shape at least partially conforming to the shape of the curved cover surface, wherein the flexible substrate is fastened to the chuck surface with a fastening unit and wherein the laminating comprises: 
 applying an adhesive to at least one of the flexible substrate and the curved cover surface; and 
 pressing at least of portion of the flexible substrate against the curved cover surface, wherein the fastening unit is thinner than the adhesive. 
 
 
     
     
       2. The method of  claim 1 , wherein the flexible substrate is a glass substrate less than 200 μm in thickness. 
     
     
       3. The method of  claim 1 , wherein the flexible substrate is a glass substrate greater than 200 μm in thickness, and further comprising:
 reducing the flexible glass substrate to a desired thickness after the touch sensor pattern is deposited thereon. 
 
     
     
       4. The method of  claim 1 , wherein the curving comprises:
 forcing the flexible substrate against the cover surface, such that the flexible substrate conforms to the shape of the curved cover surface. 
 
     
     
       5. The method of  claim 1 , wherein the chuck surface is included in a deformable chuck having an expandable surface conformable to the shape of the curved cover surface. 
     
     
       6. The method of  claim 1 , wherein the cover surface includes a curvature along a plurality of axes. 
     
     
       7. The method of  claim 1 , wherein the cover surface is a cover glass. 
     
     
       8. The method of  claim 1 , wherein the cover surface is plastic cover. 
     
     
       9. The method of  claim 1 , wherein the adhesive is at least one of a pressure adhesive and a liquid adhesive. 
     
     
       10. The method of  claim 1 , wherein the touch sensor pattern is formed of at least one of Indium Tin Oxide (ITO), Antimony Tin Oxide (ATO), silver ink and copper. 
     
     
       11. The method of  claim 1 , wherein the touch surface is incorporated within a computing system. 
     
     
       12. The method of  claim 11 , wherein the touch surface is incorporated within a display device.

Description:
FIELD 
     This relates generally to the formation of touch panels, and in particular, to forming a curved touch panel having at least one touch sensor formed using thin flexible substrates. 
     BACKGROUND 
     Recently, input devices utilizing touch sensors, such as track pads, touch screens and the like, have become increasingly popular. In portable computing devices such as laptop computers, the input devices are commonly track pads (also known as touch pads). With a track pad, the movement of an input pointer (i.e., cursor) usually corresponds to the relative movements of the user&#39;s finger (or stylus) as the finger is moved along a surface of the track pad. 
     In the case of hand-held personal digital assistants (PDA) or mobile devices, the input devices tend to utilize touch-sensitive display screens. When using a touch screen, a user can make a selection on the display screen by pointing directly to objects on the screen using a stylus or finger. Touch screens can include a touch sensor panel, which can be a clear panel with a touch-sensitive surface, and a display device such as a liquid crystal display (LCD) that can be positioned partially or fully behind the panel, or integrated with the panel, so that the touch-sensitive surface can cover at least a portion of the viewable area of the display device. Touch screens can allow a user to perform various functions by touching the touch sensor panel using a finger, stylus or other object at a location often dictated by a user interface (UI) being displayed by the display device. In general, touch screens can recognize a touch event and the position of the touch event on the touch sensor panel, and the computing system can then interpret the touch event in accordance with the display appearing at the time of the touch event, and thereafter can perform one or more actions based on the touch event. 
     Depending on design specifications, touch sensor panels can be formed in a variety of shapes and curvatures. However, in the case of a touch screen, for example, a transparent substrate (e.g., glass) can include a thin transparent patterned film, for example, laminated (or otherwise deposited or formed) thereon. Because of the desired thinness of the substrate and thin film, difficulties can occur during fabrication due to the risk of damaging components of the touch sensor panel. For example, conventional lamination processes are adequate for laminating a substantially flat/planar substrate to a substantially flat/planar material. However, conventional techniques may not be useable when a flexible glass substrate is to be laminated to a curved cover surface, for example, due to the risk of damaging the substrate and/or cover surface. 
     SUMMARY 
     Presently disclosed embodiments are directed to solving issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. 
     Embodiments described herein relate to the formation of curved touch surfaces having curved substrates. According to an embodiment, the curved substrate can be a thin glass substrate less than 200 μm in thickness. 
     Embodiments described herein are directed to a method of forming a curved touch surface including depositing a touch sensor pattern on a flexible substrate, and curving the flexible substrate to conform to a shape of a curved cover surface. The flexible substrate can be curved by supporting the flexible substrate on the chuck surface such that the flexible substrate conforms to a shape of the chuck surface, or forcing the flexible substrate against the cover surface, such that the flexible substrate conforms to the shape of the curved cover surface. 
     According to an embodiment, a method of forming a curved touch surface can include forming one or more touch sensors on a flexible substrate oriented in a flat configuration. Then, the flexible substrate can be molded to conform to a curved cover surface, and adhered to the curved cover surface. 
     The flexible substrate can be a glass substrate greater than 200 μm in thickness, and can be reduced to a desired thickness below 200 μm, for example, after the touch sensor pattern is deposited thereon. Thereafter, the curved flexible substrate can be laminated, or otherwise adhered, to the cover surface. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present disclosure, in accordance with one or more various embodiments, is described in detail with reference to the following figures. The drawings are provided for purposes of illustration only and merely depict exemplary embodiments of the disclosure. These drawings are provided to facilitate the reader&#39;s understanding of the disclosure and should not be considered limiting of the breadth, scope, or applicability of the disclosure. It should be noted that for clarity and ease of illustration these drawings are not necessarily made to scale. 
         FIG. 1  illustrates an exemplary touch sensor panel stackup, according to one embodiment described herein. 
         FIG. 2A  illustrates a touch sensor panel with a curved cover surface, according to one embodiment described herein. 
         FIG. 2B  illustrates a constant wall touch sensor panel, according to one embodiment described herein. 
         FIGS. 3A-3D  illustrates an exemplary process of forming a touch sensor with a flexible substrate and a curved cover surface, according to various embodiments described herein. 
         FIG. 4A  illustrates an exemplary mobile telephone that can include a touch sensor with a curved substrate, according to various embodiments described herein. 
         FIG. 4B  illustrates an exemplary digital media player that can include a touch sensor with a curved substrate and cover surface, according to various embodiments described herein. 
         FIG. 4C  illustrates exemplary personal computer that can include a touch sensor with a curved substrate and cover surface, according to various embodiments described herein. 
         FIG. 5  illustrates an exemplary computing system including one or more touch sensors with curved substrates and cover surfaces, according to various embodiments described herein. 
     
    
    
     DETAILED DESCRIPTION 
     In the following description of embodiments, reference is made to the accompanying drawings which form a part hereof, and in which it is shown by way of illustration specific embodiments that can be practiced. It is to be understood that other embodiments can be used and structural changes can be made without departing from the scope of the disclosed embodiments. 
     This relates to the formation of curved touch surfaces having curved substrates. According to an embodiment, the curved substrate can be a thin glass substrate less than 200 μm in thickness. Embodiments described herein are directed to a method of forming a curved touch surface including depositing a touch sensor pattern on a flexible substrate, and curving the flexible substrate to conform to a shape of a curved cover surface. In order to curve the flexible substrate, according to one embodiment, the flexible substrate can be supported on a chuck surface, such that the flexible substrate can conform to a shape of the chuck surface, which can have a substantially similar shape to the shape of the cover surface. As an alternative (or in addition), the flexible substrate can be forced against the curve cover surface so that the flexible substrate can conform to the shape of the cover surface. Thereafter, the curved flexible substrate can be laminated to the cover surface. 
       FIG. 1  illustrates an exemplary touch screen stackup, including a touch sensor panel with drive and sense electrodes formed with a thin film layer deposited on substrate, according to various embodiments. Touch surfaces, such as capacitive sensing surfaces, generally contain several layers of material. For example, the capacitive sensing surface can include a protective/cosmetic shield (e.g., a cover glass  104  or other dielectric material), one or more electrode layers and a substrate  108 . The protective shield (e.g., cover surface  104 ) is the part of the capacitive sensing surface that can be touched by the user to perform functions such as control operations, gestures, or cursor movements on a display screen, for example. According to various embodiments, the cover surface can be glass or plastic, for example. The cover surface can cover the electrode layer(s), and the electrode layer(s) can be formed on the substrate  108  by depositing thin film  109  thereon. According to embodiments described herein, the substrate  108  can be a glass substrate or plastic substrate, for example, with a thickness less than 200 μm. 
     Capacitive sensing surfaces as described herein can refer to a track pad, touch mouse, touch screen, or any other touch-sensitive surface. For exemplary purposes, various embodiments are described with reference to a touch sensor incorporated within a touch screen. It is noted, however, that the processes described herein can be implemented for various other devices equipped with one or more touch sensors. 
     In the case of the touch sensor being incorporated within a touch screen, the thin film material used to form the drive and sense electrodes can be a substantially transparent conductive material, such as Indium Tin Oxide (ITO) or Antimony Tin Oxide (ATO), for example. However, the thin film  109  can be any other transparent or non-transparent conductive materials, such as silver ink, copper, SiO 2 , or the like. Thin film  109  can be laminated to substrate  108 , or the ITO can be deposited using a sputtering process, a lithography etch, or any other deposition technique. 
     Thin film  109  can include one or more electrode layers having a matrix of drive and sense electrodes of a conductive material. Drive signals can be transmitted through the drive electrodes, resulting in signal (mutual) capacitances between the drive and sense electrodes at the intersection (touch pixels) of the drive electrodes and the sense electrodes. Sensing electronics can be adapted to detect the change in capacitance at each of the sense electrodes as a finger or other object passes over or contacts the touch surface. The capacitance between drive and sense electrodes can appear as a stray capacitance when the given row is held at direct current (DC) voltage levels and as a mutual signal capacitance Csig when the given row is stimulated with an alternating current (AC) signal. The presence of a finger or other object near or on the touch sensor panel can be detected by measuring changes to a signal charge present at the touch pixels being touched, which is a function of Csig. The resulting change in signal capacitance is recognized by the sensing electronics to indicate that a finger or other object has contacted (or is in proximity to) the touch surface at a known pixel. 
     The sensing electronics can include an application specific integrated circuit (ASIC) that can be configured to detect a change in capacitance at each of the electrodes and to compute the position of finger movement based on the change in capacitance over time at each of the sense electrodes. The ASIC can also be configured to report this information to other logic within the computing device, such as a host processor. 
     Substrate  108  of the type described above, with a thin film  109  forming patterned drive electrodes and sense electrodes, can be bonded to the cover surface  104  with pressure sensitive adhesive (PSA)  110 . It is noted that PSA  110  is used in the depicted embodiment for exemplary purposes. Alternatively, re-workable PSAs, thermoplastic film, thermoset film, thermal cure liquid (single or multiple components), ultraviolet (UV) cure liquid, and multiple-component adhesives that cure at room temperature can be used. The adhesive can be applied to the substrate  108 , cover surface  104  or both. 
     An unpatterned layer of ITO (not shown) can optionally be formed on the bottom of the substrate  108  to act as a shield. Anti-reflective (AR) film  114  can then be deposited over the unpatterned ITO. LCD module  116  can be placed beneath the substrate  108 , optionally separated by air gap  118  for ease of repair. Of course, various combinations of the layers of materials depicted in  FIG. 1 , or completely different layers, can be used without departing from the scope of the present disclosure. Also, the thin film  109  can be formed and patterned below the substrate  108 , or on both sides, according to various embodiments. 
     Depending on design preferences, touch sensor panels can take various shapes and/or curvatures. For example, touch sensor panels can have a convex or concave curvature along either the x or y axis, or both axes, or can be completely spherical.  FIG. 2A  shows an exemplary stackup, including (for simplicity) substrate  108 , thin film  109  and cover surface  104  (e.g., glass or plastic), where the cover surface is curved along at least one axis. Accordingly, the touch sensor can have a visual effect of being convex with respect to the user. Since the substrate remains flat in the convex design of  FIG. 2A , the overall thickness of the touch sensor panel can be greater than if the cover surface  104  is also flat, as shown in  FIG. 1 . Moreover, capacitive sensing at the sense electrodes formed with thin film  109  can be degraded, due to the greater distance between a user&#39;s finger contacting the cover surface  104 , for example, and the drive and sense electrodes (i.e., the greater distance between cover surface  104  and thin film  109 ). 
       FIG. 2B  illustrates a constant wall touch sensor panel, according to one embodiment described herein. According to  FIG. 2B , the thickness “y” of the touch sensor panel can remain constant, since the substrate  108  is curved to a substantially similar degree as the cover surface  104 . Using the constant wall design as shown in  FIG. 2B , the overall thickness of the touch sensor panel can be less than the design shown in  FIG. 2A , while touch sensitivity can remain high, since the distance between cover surface  104  and thin film  109  is unchanged from that of the completely flat stackup of  FIG. 1 , for example. In addition, visual distortion of the display, due to the curved cover surface can be reduced. That is, the amount of cover material to see through in the middle of the display is greater than at the edges, which can result in distortions. 
     Moreover, the overall weight of the touch sensor panel can be reduced, since less material can be required for the cover surface  104 . As yet another advantage, the curved substrate  108  leaves available real estate beneath the touch sensor panel for other components of a computing system or device to which the touch sensor panel can be communicatively coupled. However, to achieve these advantages, it can be desirable to form the touch sensor with a curved substrate  108 . 
     As noted above, the curved substrate  108  can be glass (or other transparent material such as plastic), when used within a touch screen, for example, to provide transparency. However, due to the dimensional requirements of the touch sensor, a substrate  108  can be required to be very thin (e.g., between 50 and 150 μm). Curving such thin substrate material to conform to a shape of a curved cover surface  104  can cause the substrate to crack. 
       FIG. 3A  shows an exemplary system for curving and laminating the flexible substrate  108  to the cover surface  104 , according to one embodiment of the present disclosure. In the exemplary embodiment depicted in  FIG. 3A , the flexible substrate  108  can be curved to conform to the shape of the cover surface  104  by the chuck surface  300 . For exemplary purposes, the curved cover surface  104  is curved along two axes; however, a cover surface having various curvatures, to various degrees, along one or more axes can be similarly employed. 
     As shown in  FIG. 3A , flexible substrate  108  includes a thin film  109 . Thin film  109  can be deposited (e.g., laminated) to substrate  108 . Thin film  109  can be patterned to form the touch sensor pattern of drive and sense electrodes, as described above. According to one embodiment, the processing of thin film  109  can occur while substrate  108  is flat, and resting (or otherwise attached) to flat surface. According to various embodiments, the flexible substrate  108  can be relatively thick (e.g., greater than 200 μm) while the thin film is deposited therein. Thereafter, the flexible substrate  108  can be thinned by machining the flexible glass substrate to a desired thickness (e.g., below 200 μm) using a variety of known techniques, without departing from the scope of the present disclosure. 
     According to the embodiment depicted in  FIG. 3A , flexible substrate  108  can be supported on chuck surface  300 , which can be any rigid surface, such as plastic or glass for example. Flexible substrate  108  can be secured to chuck surface  300  with vacuum suction or mechanically held in place with fasteners  312 , according to one embodiment. Of course, various other techniques for securing the flexible substrate  108  to the chuck surface  300  can be employed, such as static electricity, temporary lamination, and the like. According to one embodiment, chuck surface  300  can be shaped in a substantially similar shape as preformed cover surface  104 , which can be held by chuck  310 , for example. In this case, flexible substrate  108  can conform to the curvature of chuck surface  300 , which in turn can cause flexible substrate  108  to conform to cover surface  104 . 
     When chucks  300  and  310  are brought together, flexible substrate  108  can adhere to cover surface  104 , using PSA  110 , for example, which is pre-deposited on cover surface  104 , according to one exemplary embodiment. As noted above, any adhesive can be used, such as re-workable PSAs, thermoplastic film, thermoset film, thermal cure liquid (single or multiple components), UV cure liquid, multiple-component adhesives that cure at room temperature, and double-sided tape. Further, the adhesive can be pre-deposited on flexible surface  108  in addition to, or instead of, cover surface  104 . 
     It is important to note that fasteners  312  can be thinner (e.g., ˜150 μm) than the thickness of PSA  110  (e.g., ˜200 μm), according to an embodiment, since chuck surface  300  must press the flexible substrate  108  against cover surface  104  (including PSA  110 ) so that flexible surface  108  adheres to cover surface  104 . If the fasteners  312  were thicker than the PSA  110 , the flexible substrate  108  may be unable to be pressed against cover surface  104 . 
       FIG. 3B  shows an exemplary system for curving and laminating the flexible substrate  108  to the cover surface  104 , according to one embodiment. According to the embodiment depicted in  FIG. 3B , it is not necessary for the chuck surface  300  to be shaped to the exact curvature of the cover surface  104 . 
     Similarly to  FIG. 3A , as shown in  FIG. 3B , flexible glass substrate  108  can include a thin film  109  (see  FIG. 3A ) patterned with touch sensor circuitry, which is not depicted in  FIG. 3B  for simplicity. According to the embodiment depicted in  FIG. 3B , flexible substrate  108  can be supported on chuck surface  300 . Flexible substrate  108  can be secured to chuck surface  300  with vacuum suction or mechanically held in place with fasteners  312 , according to one embodiment. According to one embodiment, chuck surface  300  can be shaped substantially differently as compared to preformed cover surface  104 , which can be held by chuck  310 , for example. In this case, flexible substrate  108  can conform to the curvature of cover surface  104  when it is pressed against cover surface  104  by chuck surface  300 . That is, it is not necessary for flexible substrate  108  to be curved to match the curvature of cover surface  104  before the laminating process. In the exemplary embodiment of  FIG. 3B , PSA  110  is pre-deposited on flexible substrate  108  and cover surface  104 ; however, as noted above, one can apply adhesive to either the flexible substrate or the cover surface, or both. 
       FIG. 3C  shows an exemplary system for curving and laminating the flexible substrate  108  to the cover surface  104 , according to one embodiment. According to the exemplary embodiment depicted in  FIG. 3C , the chuck surface  300  can include a deformable surface  312  (e.g., an inflatable bladder) that can conform to the shape of the cover surface  104  when pressed against it. For simplicity, the thin film  109  and PSA  110  are not shown. 
     As shown in  FIG. 3C , flexible substrate  108  can rest on deformable surface  312  (or can be otherwise secured using techniques described above). Deformable surface  312  be any deformable material, such as plastic or rubber, which can hold a gas or a liquid, or other conformable material such as a gel or the like. 
     When chuck surfaces  300  and  310  are brought together, deformable surface  312  can expand due to the force of being squeezed (see  FIG. 3D ), such that deformable surface  312  conforms to the curvature of cover surface  104 . As a result, the flexible substrate  108  can conform to the shape of cover surface  104 , and adhere thereto. 
       FIG. 4A  illustrates exemplary mobile telephone  436  including a touch screen device  430 , the touch screen device  430  including a curved touch surface formed with a curved substrate, according to one disclosed embodiment. 
       FIG. 4B  illustrates exemplary digital media player  440  that can include a touch screen device  430  and a track pad device  450 . The touch screen device  430  and/or the track pad device  450  can include a curved touch surface formed with a curved substrate, according to one disclosed embodiment. 
       FIG. 4C  illustrates exemplary personal computer  444  that can include a display  430 , and a track pad  450  including a curved touch surface formed with a curved substrate, according to one disclosed embodiment. 
       FIG. 5  illustrates example computing system  500  including a touch surface  524 , and a touch controller  506 , according to one embodiment. Any of the embodiments depicted in  FIG. 4A ,  4 B or  4 C can be realized with a similar computing system  500 . Touch controller  506  can be an ASIC that can include one or more processor subsystems  502 , which can include, for example, one or more main (local) processors, such as ARM968 processors or other processors with similar functionality and capabilities. However, in other embodiments, some processor functionality can be implemented instead by dedicated logic, such as a state machine. Processor subsystems  502  can also include, for example, peripherals (not shown) such as random access memory (RAM) or other types of memory or storage, watchdog timers and the like. Touch controller  506  can also include, for example, receive section  507  for receiving signals, such as touch sense signals  503  from sense electrodes (e.g., one or more columns of electrodes) of touch surface  524 , and other signals from other sensors such as sensor  511 , etc. Charge pump  515  can be used to generate the supply voltage for the transmit section, which can control the drive electrodes (e.g., one or more rows of electrodes). Although  FIG. 5  shows charge pump  515  separate from transmit section  514 , the charge pump can be part of the transmit section. 
     Touch controller  506  can also include, for example, a demodulation section such as multistage vector demod engine  509 , panel scan logic  510 , and a drive system including, for example, transmit section  514 . Panel scan logic  510  can access RAM  512 , autonomously read data from the sense channels and provide control for the sense channels. In addition, panel scan logic  510  can control transmit section  514  to generate stimulation signals  516  at various frequencies and phases that can be selectively applied to the drive electrodes of touch surface  524 . 
     Touch controller  506  can be adapted to detect the change in mutual capacitance at each of the touch pixels as a finger or other object passes over or contacts the touch surface. Touch controller  506  can be configured to compute the position of finger movement based on the change in mutual capacitance at each of the touch pixels. Touch controller  506  can also be configured to report this information to other logic within touch controller  506 , or host processor  528 , for example. In non-capacitive embodiments, the touch controller can be adapted in accordance with the touch sensing technology to transmit or receive optical or acoustic wave communications, for example. 
     While various embodiments have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. Likewise, the various diagrams may depict an example architectural or other configuration for the disclosure, which is done to aid in understanding the features and functionality that can be included in the disclosure. The disclosure is not restricted to the illustrated example architectures or configurations, but can be implemented using a variety of alternative architectures and configurations. Additionally, although the disclosure is described above in terms of various exemplary embodiments and implementations, it should be understood that the various features and functionality described in one or more of the individual embodiments are not limited in their applicability to the particular embodiment with which they are described. They instead can be applied alone or in some combination, to one or more of the other embodiments of the disclosure, whether or not such embodiments are described, and whether or not such features are presented as being a part of a described embodiment. Thus the breadth and scope of the present disclosure should not be limited by any of the above-described exemplary embodiments.

Metadata:
Filing Date: 20101105
Publication Date: 20140819
Grant Date: 20140819
Priority Date: 20101105
Inventors: SUNG KUO-HUA
FEINSTEIN CASEY J.
GRESPAN SILVIO
Assignee: APPLE INC
CPC Classifications: [{"code": "Y10T156/1031", "inventive": false, "first": false, "tree": "[]"}, {"code": "B32B17/10174", "inventive": true, "first": false, "tree": "[]"}, {"code": "B32B17/10036", "inventive": true, "first": false, "tree": "[]"}, {"code": "B32B17/10146", "inventive": true, "first": false, "tree": "[]"}, {"code": "B32B38/1866", "inventive": true, "first": true, "tree": "[]"}, {"code": "B32B17/10211", "inventive": true, "first": false, "tree": "[]"}, {"code": "B32B17/10036", "inventive": true, "first": false, "tree": "[]"}, {"code": "B32B17/10146", "inventive": true, "first": false, "tree": "[]"}, {"code": "B32B38/1866", "inventive": true, "first": true, "tree": "[]"}, {"code": "B32B17/10211", "inventive": true, "first": false, "tree": "[]"}, {"code": "B32B2457/208", "inventive": false, "first": false, "tree": "[]"}, {"code": "B32B2457/208", "inventive": false, "first": false, "tree": "[]"}, {"code": "B32B17/10174", "inventive": true, "first": false, "tree": "[]"}]
Family ID: 46018489