Abstract:
A multiple interface smart card adaptor is described for mobile phones to take advantage of at least wireless and contactless communications.

Description:
RELATED APPLICATION 
     This application is a Continuation of U.S. patent application Ser. No. 11/972,919, filed Jan. 11, 2008, which claims the benefit of U.S. Provisional Application No. 60/968,762, filed 29 Aug. 2007 by inventors Ying-Che Lo, Huan-Chin Luo, Albert Sun and Pao-Chieh An entitled Multiple Interface Card in a Mobile Phone. This application is incorporated herein by reference. 
    
    
     BACKGROUND 
     1. Background 
     The present technology relates generally to mobile phones, and more specifically to multiple interface mobile phones, in that there are interfaces enabled for at least wireless and contactless communications. 
     2. Description of Related Art 
     The use of electronic information storage cards such as smart cards has grown rapidly in recent years as mobile devices have increasingly replaced heavier, larger devices. 
     Smart cards can be used in a wide range of applications including Subscriber Identification Modules (SIMs) for mobile phones, credit or ATM cards, high-security identification and access-control cards, authorization cards for pay television, public transport and public phone payment cards. SIM cards are widely deployed and used around the world, particularly in countries that run Global System for Mobile Communications (GSM) cellular networks. A SIM card is an integrated circuit card about the size of a postage stamp with embedded integrated circuits. The embedded integrated circuits of the SIM card store information such as the identification of a mobile phone service subscriber, subscription information, preferences, saved telephone numbers, text messages and other type of information depending on the design. 
     SUMMARY 
     One aspect of the technology is an apparatus with a circuit board and multiple sets of electrical contact pads. The circuit board has two principal surface on opposite sides of the circuit board. The multiple sets of electrical contact pads include at least three sets of electrical contact pads. A first set of electrical contact pads is on the first principal surface. The first set of electrical contact pads is arranged to electrically connect with a mobile phone smart card. Thus, the first set of electrical contact pads communicates data of the mobile phone smart card for wireless and contactless communication. A second set of electrical contact pads is on the second principal surface. The second set of electrical contact pads is arranged to electrically connect with a smart card socket of a mobile phone. Thus, the second set of electrical contact pads communicates data with the smart card socket of the mobile phone for wireless communication. A third set of electrical contact pads is arranged on the circuit board to electrically connect with a contactless communication antenna external to the circuit board. Thus, the third set of electrical contact pads communicates data with the contactless communication antenna for contactless communication. 
     Contactless communication is over distances shorter than wireless communication. Examples of contactless communication are near field communication, and proximity and vicinity communication such as those compliant with ISO 14443 and/or ISO 15693. Examples of wireless communication are GSM, TDMA, CDMA, and various 3G and 4G standards. 
     Some embodiments further include the mobile phone smart card adjacent to the first principal surface of the circuit board. 
     Some embodiments further include the mobile phone. The mobile phone includes the mobile phone smart card socket adjacent to the second principal surface of the circuit board. 
     Some embodiments further include the contactless communication antenna. Some embodiments further include a battery providing power to the mobile phone, and the contactless communication antenna adjacent to the battery. In some embodiments the mobile phone has a housing surrounding the mobile phone which includes a removable battery cover, and the contactless communication antenna is on the battery cover. 
     Some embodiments further include various combinations of the mobile phone with smart card socket, the mobile phone smart card, and the contactless communication antenna, such as all three or any two. 
     Multiple embodiments variously locate contactless communication circuitry in the mobile phone smart card and in an integrated circuit on the circuit board. 
     In some embodiments, the mobile phone smart card has the contactless communication circuitry. The second set of electrical contact pads of the circuit board is electrically connected with at least one electrical contact pad of the first set of electrical contact pads of the circuit board. Thus, the first and second sets of electrical contact pads of the circuit board directly communicate data between the mobile phone smart card and the smart card socket of the mobile phone for wireless communication. The third set of electrical contact pads of the circuit board is electrically connected with at least one electrical contact pad of the first set of electrical contact pads of the circuit board. Thus, the first and third sets of electrical contact pads of the circuit board directly communicate data between the mobile phone smart card and the contactless communication antenna for contactless communication. 
     In some embodiments, the first set of electrical contact pads of the circuit board communicates data of the mobile phone smart card, such that the mobile phone smart card has a first set of smart card contact pads compliant with ISO 7816. In some embodiments, the mobile phone smart card has extra contact pads in addition to the first sets of smart card contact pads, whereby the extra contact pads support contactless communication of the mobile phone. In other embodiments, despite the mobile phone smart card having no extra contact pads, in addition to the first set of smart card contact pads, supporting contactless communication, the technology provides the mobile phone with contactless communication. 
     In some embodiments, the second set of electrical pads of the circuit board is arranged to electrically connect with the smart card socket of the mobile phone, such that the smart card socket has a first sets of socket contacts arranged to connect with the mobile phone smart card being compliant with ISO 7816, and the smart card socket has no extra socket contacts in addition to the first set of socket contacts supporting contactless communication. In other embodiments, despite the smart card socket having no extra socket contacts, in addition to the set of socket contacts, supporting contactless communication, the technology provides the mobile phone with contactless communication. 
     Some embodiments, further comprise at least one integrated circuit on the circuit board processing data of the mobile phone smart card for wireless and contactless communication. In some embodiments, the mobile phone smart card has no contactless communication circuitry. In other embodiments, the mobile phone smart card has contactless communication circuitry, in which case the contactless communication circuitry of the integrated circuit on the circuit board, and the contactless communication circuitry of the mobile phone smart card, are partly redundant. 
     Another aspect of the technology is a method of manufacturing the technology described herein. A circuit board having a first principal surface and a second principal surface on opposite sides of the circuit board is provided. A first set of electrical contact pads is provided on the first principal surface arranged to electrically connect with a mobile phone smart card, such that the first set of electrical contact pads communicates data of the mobile phone smart card for wireless and contactless communication. A second set of electrical contact pads is provided on the second principal surface arranged to electrically connect with a smart card socket of a mobile phone, such that the second set of electrical contact pads communicates data with the smart card socket of the mobile phone for wireless communication. A third set of electrical contact pads is provided, arranged on the circuit board to electrically connect with a contactless communication antenna external to the circuit board, such that the third set of electrical contact pads communicates data with the contactless communication antenna for contactless communication. 
     The antenna includes a connector that is detachable from the pair of wires from the flexible printed circuit board. Embodiments of the antenna can be manufactured by a wide variety of methods including etched metal lines on a printed circuit board, a wiring coil, or printing conducting wires onto a plastic paper. 
     The structures and methods of the present technology are disclosed in the detailed description below. This summary does not purport to define the invention. The invention is defined by the claims. These and other embodiments, features, aspects, and advantages of the technology can be understood with regard to the following description, appended claims and accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows an exploded perspective view of a mobile phone embodiment. 
         FIGS. 2 and 3  show top and bottom views of a mobile phone smart card in some embodiments. 
         FIGS. 4 and 5  show top and bottom views of a printed circuit board embodiment. 
         FIGS. 6 and 7  show top and bottom views, again, of a mobile phone smart card in some embodiments. 
         FIGS. 8 and 9  show top and bottom views of another printed circuit board embodiment. 
         FIGS. 10 and 11  shows top and bottom views of a contactless communication antenna. 
         FIGS. 12 and 13  shows top and bottom views of a contactless communication antenna. 
         FIGS. 14 and 15  shows top and bottom views of a contactless communication antenna. 
         FIGS. 16 and 17  shows top and bottom views of a battery with a contactless communication antenna. 
         FIG. 18  shows example dimensions of the set of electrical contact pads on embodiments of the printed circuit board complying with ISO 7816. 
     
    
    
     DETAILED DESCRIPTION 
     A description of structural embodiments and methods of the technology is provided. It is to be understood that there is no intention of limiting the invention to the specifically disclosed embodiments but that the invention may be practiced using other features, elements, methods and embodiments. Like elements in various embodiments are commonly referred to with like reference numerals. 
       FIG. 1  shows an exploded perspective view of a mobile phone embodiment. The mobile phone  106  has a smart card socket  108 . The combined smart card/printed circuit board  104  is shaped to be placed physically into the smart card socket  108 . The combined smart card/printed circuit board  104  has electrical contact pads arranged to electrically couple with the electrical contact pads in the smart card socket  108 , when the combined smart card/printed circuit board  104  is placed physically into the smart card socket  108 . The battery  102  has a contactless communication antenna. The contactless communication antenna has electrical contact pads arranged to electrically couple with contactless communication electrical contact pads of the combined smart card/printed circuit board  104 , when the combined smart card/printed circuit board  104  is placed physically into the smart card socket  108 , and the battery  102  is placed in the mobile phone  106 . The housing of the mobile phone  106  includes a removable battery cover  100 . In an other embodiment, the contactless communication antenna is on the removable battery cover  100 . In such an embodiment, the contactless communication antenna has electrical contact pads arranged to electrically couple with contactless communication electrical contact pads of the combined smart card/printed circuit board  104 , when the combined smart card/printed circuit board  104  is placed physically into the smart card socket  108 , and the battery cover  100  is placed on the mobile phone  106 . 
       FIGS. 2 and 3  show top and bottom views of a mobile phone smart card in some embodiments. The mobile phone smart card  210  has a set of electrical contact pads  212  to communicate data of the mobile phone smart card  210 . 
       FIGS. 4 and 5  show top and bottom views of a printed circuit board embodiment. One side of a printed circuit board  420  has one set of electrical contact pads  422  arranged to connect with the smart card socket  108  of a mobile phone  106 . The opposite side of the printed circuit board  420  has two sets of electrical contact pads—the set of electrical contact pads  524  and  526 , and the set of electrical contact pads  528 . The set of electrical contact pads  528  is arranged to connect with a contactless communication antenna external to the printed circuit board  420 . The set of electrical contact pads  524  and  526  is arranged to connect with a mobile phone smart card  210 . The set of electrical contact pads  524  are “pass through” contact pads that carry the same signal as the respective one of the electrical contact pads  422  from one side to the other of the printed circuit board  420 . Out of the set of electrical contact pads  524  and  526 , electrical contact pads  526  are electrically connected with the set of electrical contact pads  528  arranged to connect with a contactless communication antenna. Out of the set of electrical contact pads  524  and  526 , electrical contact pads  524  are not electrically connected with the set of electrical contact pads  528  arranged to connect with a contactless communication antenna. In this embodiment, the mobile phone smart card includes contactless communication circuitry and therefore controls the contactless communication antenna. 
       FIGS. 6 and 7  show top and bottom views, again, of a mobile phone smart card in some embodiments. The mobile phone smart card  210  has a set of electrical contact pads  212  to communicate data of the mobile phone smart card  210 . 
       FIGS. 8 and 9  show top and bottom views of another printed circuit board embodiment. The printed circuit board  820  includes an integrated circuit  830  processing data of the smart card for wireless and contactless communication. One side of a printed circuit board  820  has one set of electrical contact pads  422  arranged to connect with the smart card socket  108  of a mobile phone  106 . The opposite side of the printed circuit board  820  has two sets of electrical contact pads—the set of electrical contact pads  942  and  944 , and the set of electrical contact pads  952 . The set of electrical contact pads  952  is arranged to connect with a contactless communication antenna external to the printed circuit board  820 . The set of electrical contact pads  942  and  944  is arranged to connect with a mobile phone smart card  210 . Only some of the set of electrical contact pads  942  and  944  are “pass through” contact pads that carry the same signal as the respective one of the set of electrical contact pads  422  from one side to the other of the printed circuit board  820 , as can be seen by the limited number of traces  822  that connect to the set of electrical contact pads  422  and carry signals from one side to the other side of the printed circuit board  820 . The set of electrical contact pads  942  and  944 , are electrically connected to the integrated circuit  830 , as is evident from the traces  832  and the corresponding traces on the other side. Out of the set of electrical contact pads  942  and  944 , electrical contact pads  944  are not directly electrically connected with the set of electrical contact pads  422 . The integrated circuit  830  controls: the electrical contact pads  944  arranged to connected to the mobile phone smart card  210 , and the set of electrical contact pads  952  arranged to connect with a contactless communication antenna. 
     In other embodiments, the integrated circuit and the set of electrical contacts arranged to connect with an external contactless communication antenna switch sides. 
       FIGS. 10 and 11  shows top and bottom views of a contactless communication antenna. The contactless communication antenna  1002  has electrical contact pads  1004  arranged to connect with a set of electrical contact pads on the printed circuit board arranged to connect with the contactless communication antenna (e.g.,  528  in  FIGS. 5 and 952  in  FIG. 9 ). The contactless communication antenna  1002  also has electrical traces  1005  and  1106  arranged according to the shape of the contactless communication antenna  1002  and the position of the electrical contact pads  1004 . 
       FIGS. 12 and 13  shows top and bottom views of a contactless communication antenna. The contactless communication antenna  1202  has electrical contact pads  1204  arranged to connect with a set of electrical contact pads on the printed circuit board arranged to connect with the contactless communication antenna (e.g.,  528  in  FIGS. 5 and 952  in  FIG. 9 ). The contactless communication antenna  1202  also has electrical traces  1205  and  1306  arranged according to the shape of the contactless communication antenna  1202  and the position of the electrical contact pads  1204 . 
       FIGS. 14 and 15  shows top and bottom views of a contactless communication antenna. The contactless communication antenna  1402  has electrical contact pads  1404  arranged to connect with a set of electrical contact pads on the printed circuit board arranged to connect with the contactless communication antenna (e.g.,  528  in  FIGS. 5 and 952  in  FIG. 9 ). The contactless communication antenna  1402  also has electrical traces  1405  and  1506  arranged according to the shape of the contactless communication antenna  1402  and the position of the electrical contact pads  1404 . 
       FIGS. 16 and 17  shows top and bottom views of a battery with a contactless communication antenna. The batter  102  has a contactless communication antenna  1202 , with electrical contact pads of the contactless communication antenna  1202  folded to place the bulk of the contactless communication antenna and its contact pads on opposing sides of the battery  102 . 
       FIG. 18  shows example dimensions of the set of electrical contact pads on embodiments of the mobile phone smart card complying with ISO 7816. The distance between side walls of the chip card  20  or  100  from a left edge  112  and an upper edge  114  are also shown. 
     A typical SIM card slot is capable of holding a typical SIM card, which has second size dimensions with a plug-in size of about 25 mm long and 15 mm wide, and less than 1 mm thick. A plug-in SIM card size is for example less than 1 mm thick. Example “mini-sized” SIM cards have size dimensions of 15 mm long, 12 mm wide, and less than 1 mm thick. The SIM card includes at least a subset of contact pads compliant with ISO 7816-2, which includes contact pads 1-8 (C1-C8), defined according to ISO 7816 as follows. 
     
       
         
               
               
               
             
           
               
                 TABLE 1 
               
               
                   
               
               
                 Contact Pad 
                 Designation 
                 Description 
               
               
                   
               
             
             
               
                 C1 
                 Vcc 
                 Power connection 
               
               
                 C2 
                 RST 
                 Reset line 
               
               
                 C3 
                 CLK 
                 Clock signal line 
               
               
                 C4 
                 RFU 
                 Reserved for future use 
               
               
                 C5 
                 GND 
                 Ground line 
               
               
                 C6 
                 Vpp 
                 Programming power connection 
               
               
                 C7 
                 I/O 
                 Input/output line that provides a half- 
               
               
                   
                   
                 duplex communication channel between 
               
               
                   
                   
                 the reader and the smart card 
               
               
                 C8 
                 RFU 
                 Reserved for future use 
               
               
                   
               
             
          
         
       
     
     The contact pads C1, C2, C3, C5, C6, C7 have been assigned as interface pins for use with the functions as described in Table 1. Two of the contact pads, C4 and C8, are listed as reserved for future use. In one embodiment, the contact pads C4 and C8 are used to drive a contactless communication antenna or communicate data for use with a contactless communication antenna. In another embodiment, extra contact pads are added to drive a contactless communication antenna or communicate data for use with a contactless communication antenna.