Abstract:
An electronic signal transmitting device is disposed in a housing of an integrated circuit. The integrated circuit includes at least one first signal end and at least one second signal end. The electronic signal transmitting device includes at least one electromagnetic transmitting unit, coupled between the first signal end and the second signal end for transmitting an electronic signal between the first signal end and the second signal end; and an electromagnetic insulating layer covering the electromagnetic transmitting unit for protecting the integrated circuit from electromagnetic interference.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an electronic signal transmitting device and integrated circuit thereof for transmitting an electronic signal, and more particularly, to an electronic signal transmitting device and integrated circuit thereof with a high electro-static discharge (ESD) resistance. 
     2. Description of the Prior Art 
     With the advancement of technology, various kinds of electronic circuitry can be integrated/formed in a single chip. The electronic circuitry in an integrated circuit can be classified into core circuitry and input/output circuitry, which are both driven by power sources with different respective voltages. In order to allow the core circuit and input/output circuit to connect with the external power supplies, core power pads and input/output pads are configured in the integrated circuit. 
     Electro-static charges may easily enter the inside of the integrated circuit via the core power pads and the input/output pads when packing, testing, transporting or manufacturing the integrated circuit. When excessive amounts of charge enter the integrated circuit, an electro-static discharge phenomenon will occur. The electro-static discharge may cause the integrated circuit to work abnormally, and may even damage the electronic circuitry of the integrated circuit in a more serious situation. Thus, how to reduce the effect of electro-magnetic discharge is an important topic to be discussed. 
     SUMMARY OF THE INVENTION 
     In order to solve the above problem, the present invention provides an electronic signal transmitting device and integrated circuit thereof with a high electro-static discharge resistance. 
     The present invention discloses an electronic signal transmitting device disposed in a housing of an integrated circuit. The integrated circuit comprises at least one first signal end and at least one second signal end. The electronic signal transmitting device comprises at least one electromagnetic transmitting unit, coupled between the first signal end and the second signal end for transmitting an electronic signal between the first signal end and the second signal end; and an electromagnetic insulating layer which covers the electromagnetic transmitting unit for protecting the integrated circuit from electromagnetic interference. 
     The present invention further discloses an integrated circuit, comprising a housing; at least one first signal end, configured at a first side of the housing; at least one second signal end, configured at a second side of the housing; and an electronic signal transmitting unit, configured in the housing, comprising at least one electromagnetic transmitting unit, coupled between the first signal end and the second signal end, for transmitting an electronic signal between the first signal end and the second signal end; and an electromagnetic insulating layer which covers the electromagnetic transmitting unit for protecting the integrated circuit from electromagnetic interference. 
     These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  is a schematic diagram of an integrated circuit according to an embodiment of the present invention. 
         FIG. 1B  is a cross-sectional view of the integrated circuit shown in  FIG. 1A . 
         FIG. 2  is an equivalent circuit of the integrated circuit shown in  FIG. 1B . 
         FIG. 3A  is a schematic diagram of another integrated circuit according to an embodiment of the present invention. 
         FIG. 3B  is a cross-sectional view of the integrated circuit shown in  FIG. 3A . 
         FIG. 4  is another equivalent circuit of the integrated circuit shown in  FIG. 1B . 
     
    
    
     DETAILED DESCRIPTION 
     Please refer to  FIG. 1A , which is a schematic diagram of an integrated circuit  10  according to an embodiment of the present invention. As shown in  FIG. 1A , the integrated circuit  10  comprises a housing  100 , a plurality of first signal ends  102 , a plurality of second signal ends  104  and an electronic signal transmitting device  106 . The first signal ends  102  are configured at a side (e.g. the left side) of the housing  100  and the second signal ends  104  are configured at another side (e.g. the right side) of the housing  100 . Please note that a number of the first signal ends  102  and a number of second signal ends  104  can be appropriately changed according to different system requirements and design concepts. The electronic signal transmitting device  106  is configured in the housing  100  and comprises a plurality of electromagnetic transmitting units  108  and an electromagnetic insulating layer  110 . The electronic signal transmitting device  106  is utilized for transmitting an electronic signal ES between the plurality of first signal ends  102  and the plurality of second signal ends  104 . Through the electromagnetic insulation characteristic of the electromagnetic insulating layer  110 , the effect of the electro-static discharge (ESD) and electromagnetic interference (EMI) toward the integrated circuit  10  can be reduced. The electronic signal ES can therefore be steadily transmitted. 
     Please refer to  FIG. 1B , which is a cross-sectional view of the integrated circuit  10  shown in  FIG. 1A . Please note that FIG.  1 B only shows a first signal end  102 , a second signal end  104  and an electromagnetic transmitting unit  108  as an example. As shown in  FIG. 1B , the electromagnetic transmitting unit  108  comprises a magnetizer EB and a magnetic coil EC twining round the magnetizer EB. When the integrated circuit  10  wants to transmits the electronic signal ES, the magnetizer EB and the magnetic coil EC form an electromagnetic transmitting state, for performing the transmission of the electronic signal ES. The electromagnetic insulating layer  110  is realized by electromagnetic insulation materials, such as varnish and insulating coating, and covers the magnetizer EB and the magnetic coil EC. Via the electromagnetic insulating layer  110 , the magnetizer EB and the magnetic EC can be fixed. Moreover, a capacitance between the first signal end  102  and the second signal end  104  can be increased via using the electromagnetic insulating layer  110  to cover the magnetizer EB and the magnetic coil EC. The resistance of the electro-static discharge and the electromagnetic interference can thereby be improved. 
     Please refer to  FIG. 2 , which is an equivalent circuit diagram of the integrated circuit  10  shown in  FIG. 1B . As shown in  FIG. 2 , the electromagnetic transmitting unit  108  comprises the magnetic coil EC and an electronic signal transmitting capacitor ESTC. The magnetic coil EC is utilized for performing transmission of the electronic signal ES. The electronic signal transmitting capacitor ESTC represents an equivalent capacitor between the first signal end  102  and the second signal end  104 . Since the space between the first signal end  102  and the second signal end  104  is fully filled by the electromagnetic insulation material (i.e. the electromagnetic insulating layer  110 ), the capacitance of the electronic signal transmitting capacitor ESTC is increased. As a result, the electro-static protection ability can be effectively improved. In other words, both the electromagnetic interference resistance and the electro-static protection ability can be improved. 
     Please refer to  FIG. 3A  and  FIG. 3B , which are schematic diagrams of an integrated circuit  30  according to an embodiment of the present invention. The integrated circuit  30  shown in  FIG. 3A  and  FIG. 3B  is similar to the integrated circuit  10  shown in  FIG. 1A  and  FIG. 1B , thus the signals and the components with similar functions use the same symbols. Unlike the integrated circuit  10  shown in  FIG. 1A  and  FIG. 1B , the integrated circuit  30  further stacks an electromagnetic heat-conducting layer  300 , coupling to a plurality of cooling holes CH of the housing  100 , on the electromagnetic insulating layer  110 . The electromagnetic heat-conducting layer  300  can be a thermal grease layer, which can radiate heat rapidly through the cooling holes CH. In such a condition, the electromagnetic insulating layer  110  not only can fix the magnetizer EB and the magnetic coil EC, but also can conduct heat generated when the electromagnetic transmitting unit  108  transmits the electronic signal ES to the electromagnetic heat-conducting layer  300 , so as to radiate the heat via the electromagnetic heat-conducting layer  300  and the cooling holes CH. This prevents the integrated circuit  30  from overheating and functioning abnormally. 
     Noticeably, the integrated circuit of the above embodiments utilizes the electromagnetic insulating layer made by electromagnetic insulation material to cover the electromagnetic transmitting unit, for increasing the equivalent capacitance between the first signal ends and the second signal ends. The resistance of the electro-static discharge and the electromagnetic interference of the electronic signal transmitting device can therefore be improved. In another embodiment, the integrated circuit radiates the heat generated when the electronic signal transmitting device transmits the electronic signal via the electromagnetic heat-conducting layer configured in the housing of the integrated circuit and the cooling holes of the housing, for preventing the integrated circuit from working abnormally due to overheating. According to different applications and requirements, those with ordinary skill in the art may observe appropriate alternations and modifications. For example, the electronic signal transmitting device may further comprise a waveform filter unit for filtering the noise of the electronic signal. Please refer to  FIG. 4 , which is another equivalent circuit diagram of the integrated circuit  10  shown in  FIG. 1B . The integrated circuit  10  shown in  FIG. 4  is similar to the integrated circuit  10  shown in  FIG. 2 , thus the components and signals with the similar functions use the same symbols. Unlike  FIG. 2 , the equivalent circuit shown in  FIG. 4  further comprises a waveform filter unit  400  electrically connected between the first signal end  102  and the magnetic coil EC, respectively. The waveform filter unit  400  is utilized for filtering the noise of the electronic signal ES so that the noise of the electronic signal ES can be reduced. 
     To sum up, the electronic signal transmitting device and the integrated circuit of the above embodiments improve the resistance of electro-static discharge and the electromagnetic interference between the first signal ends and the second signal ends via covering the electromagnetic insulating layer. Furthermore, the electronic signal transmitting device and the integrated circuit of the above embodiments can also improve the heat-radiating ability via adding the electromagnetic heat conducting layer coupled to the cooling holes of the housing, to prevent abnormal functioning of the integrated circuit due to overheating. 
     Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.