Patent Document

CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims priority under 35 USC 119 from Japanese Patent Application No. 2016-132628, filed on Jul. 4, 2017, the disclosure of which is incorporated by reference herein. 
       BACKGROUND 
     Technical Field 
       [0002]    The present disclosure relates to a semiconductor device and a semiconductor chip. 
       Related Art 
       [0003]    Semiconductor devices are known in which a semiconductor chip and electronic components that is connected to the semiconductor chip are mounted on a lead frame. 
         [0004]    For example, Japanese Patent Application Laid-Open (JP-A) No. 2004-165429 discloses a semiconductor device in which a semiconductor chip and passive elements are fixed to a lead frame. In the above disclosure, the passive elements in the semiconductor device are manufactured separately from the lead frame and are fixed to the lead frame. 
         [0005]    In addition, JP-A No. 2005-033761 discloses a piezoelectric oscillator that includes a oscillator package in which a piezoelectric oscillator element is housed, and a semiconductor element including an oscillator circuit electrically connected to the oscillator package. In this piezoelectric oscillator, the oscillator package and the semiconductor element are respectively fixed to mutually distinct faces of an island portion of the lead frame. 
         [0006]    As a configuration for a semiconductor device in which a semiconductor chip and electronic components that are connected to the semiconductor chip are mounted on a lead frame, the semiconductor device may be, for example, configured such that the electronic components are disposed between the semiconductor chip and lead terminals, and plural wires connecting the lead terminals and the semiconductor chip are disposed so as to bridge the electronic components. However, in such a configuration, wires connecting the semiconductor chip and the electronic components may contact with wires connecting the semiconductor chip and the lead terminals, in a case in which the semiconductor chip and the electronic components are connected by wires. 
       SUMMARY 
       [0007]    The present disclosure provides, in a semiconductor device that includes a semiconductor chip and electronic components connected to the semiconductor chip, a semiconductor device that may prevent wires connecting the semiconductor chip and the electronic components from contacting with other wires. 
         [0008]    A first aspect of the present disclosure is a semiconductor device including: a semiconductor chip including a circuit having a predetermined function, at least one first terminal connected to the circuit, and a plural second terminals not connected to the circuit, the first terminal and the second terminals being formed along one edge of the semiconductor chip; plural third terminals provided at positions outside of the semiconductor chip and opposing the one edge, each of the plural third terminals being connected to one of the plural second terminals by a respective first wire; and an electronic component provided between the semiconductor chip and the third terminals, the electronic component including a fourth terminal that is connected to the first terminal by a second wire and is disposed below some of the first wires, wherein the first terminal is disposed at a position such that the first wires and the second wire do not intersect. 
         [0009]    A second aspect of the present disclosure is semiconductor chip having a rectangular external profile including: an oscillator circuit; plural terminals provided along one edge forming an outer periphery of the semiconductor chip; and internal wiring that connects one of the plural terminals with the oscillator circuit and that runs through a region between the one of the plural terminals and the one edge of the semiconductor chip. 
         [0010]    According to the above aspects, the present disclosure may provide a semiconductor device that may prevent wires connecting a semiconductor chip and electronic components from contacting with other wires, in a semiconductor device that includes the semiconductor chip and the electronic components connected to the semiconductor chip. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    Exemplary embodiments will be described in detail based on the following figures, wherein: 
           [0012]      FIG. 1  is a plan view illustrating a configuration of a semiconductor device according to an exemplary embodiment of the present disclosure; 
           [0013]      FIG. 2  is a perspective view illustrating a configuration of a semiconductor device according to an exemplary embodiment of the present disclosure; 
           [0014]      FIG. 3  is a plan view illustrating a configuration of a semiconductor device according to a comparative example; 
           [0015]      FIG. 4  is a perspective view illustrating a configuration of a semiconductor device according to a comparative example; and 
           [0016]      FIG. 5  is a plan view illustrating a configuration of a semiconductor device according to another exemplary embodiment of the present disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0017]    Explanation follows regarding example exemplary embodiments of the present disclosure, with reference to the drawings. Note that in the drawings, configuration elements and portions that are the same or are equivalent are appended with the same reference numerals. 
       First Exemplary Embodiment 
       [0018]      FIG. 1  is a plan view illustrating a configuration of a semiconductor device  1  according to an exemplary embodiment of the present disclosure, and  FIG. 2  is a perspective view of the semiconductor device  1 . In the semiconductor device  1 , a semiconductor chip  10  and an oscillating element  30  are mounted on a die pad  50  that configures a lead frame. The semiconductor chip  10  has a rectangular external shape, and the semiconductor chip  10  is provided with plural electrode pads along each of the edges forming the outer periphery of the semiconductor chip  10 . Plural lead terminals  51  that configure the lead frame are provided at positions opposing one edge A 1  of the semiconductor chip  10 . The plural lead terminals  51  are arrayed along the edge A 1 . The oscillating element  30  is disposed between the plural lead terminals  51  and the semiconductor chip  10 . 
         [0019]    The semiconductor chip  10  includes an oscillator circuit  11  that is connected to the oscillating element  30 . Two electrode pads  21  that are each connected to the oscillator circuit  11 , and plural electrode pads  22  that are not connected to the oscillator circuit  11 , are provided along the edge A 1  of the semiconductor chip  10 . 
         [0020]    The two electrode pads  21  connected to the oscillator circuit  11  are provided spaced apart from each other. Some of the plural electrode pads  22  that are not connected to the oscillator circuit  11  are disposed between the one and the other of the electrode pads  21 . Each of the electrode pads  21  is connected to the oscillator circuit  11  by internal wiring  23  that runs through a region between the edge A 1  of the semiconductor chip  10  and the electrode pads  21  and  22 , namely, that runs through an outer peripheral region of the semiconductor chip  10 . Namely, the internal wiring  23  does not configure a wiring layout that connects the electrode pads  21  and the oscillator circuit  11  by the shortest routes, and the internal wiring  23  configures a wiring layout that diverts along the edge A 1  side of the semiconductor chip  10 . In other words, the internal wiring  23  connecting the oscillator circuit  11  and the electrode pads  21  configures a wiring layout that passes through the region between two electrode pads  22  disposed between the two electrode pads  21  and that connects to the electrode pads  21 . Forming the wiring layout of the internal wiring  23  in such manner may avoid interference between the internal wiring  23  and other wiring formed in the semiconductor chip  10 , and may simplify the arrangement of other wiring. 
         [0021]    Each of the plural electrode pads  22  not connected to the oscillator circuit  11  is connected to a corresponding lead terminal  51  by a wire  42 . Namely, respective wires  42  are disposed so as to bridge the oscillating element  30 . 
         [0022]    The oscillating element  30  includes, for example, a crystal oscillator. The external profile of the oscillating element  30  is, for example, a rectangular shape, and the longitudinal direction of the oscillating element  30  is disposed so as to face the edge A 1  of the semiconductor chip  10 . The length of the oscillating element  30  in the longitudinal direction is substantially the same as the length of the semiconductor chip  10 , or is longer than the length of the semiconductor chip  10 . The oscillating element  30  includes two electrode pads  31  provided on the surface of the oscillating element  30 . The two electrode pads  31  are spaced apart from each other along the longitudinal direction (the direction along the edge A 1 ) of the oscillating element  30 . Each of the electrode pads  31  is disposed at a longitudinal direction end portion of the oscillating element  30 . The size of each of the electrode pads  31  is sufficiently larger than the size of the electrode pads  21  and  22  formed on the semiconductor chip  10 . Each of the two electrode pads  31  is disposed below the wires  42 . In  FIG. 1  and  FIG. 2 , extension lines from mutually opposing edges B 1  and edges B 2  of the electrode pads  31  of the oscillating element  30  are illustrated by dashed lines. The two electrode pads  21  connected to the oscillator circuit  11  are each provided within a region R, which is a region between the edge B 1  extension line and the edge B 2  extension line of the respective electrode pad  31 . Namely, the two electrode pads  21  connected to the oscillator circuit  11  are disposed such that the distance to the electrode pads  31  is as small as possible. 
         [0023]    The two electrode pads  21  connected to the oscillator circuit  11  and the two electrode pads  31  of the oscillating element  30  are respectively connected by wires  41 . Each of the wires  41  is provided not to intersect with the wires  42  that connect the electrode pads  22  and the lead terminals  5 . Namely, the electrode pads  21  are disposed at positions such that the wires  41  do not intersect with the wires  42 . Namely, since the placement angle of each of the wires  41  changes depending on the arrangement of the respective electrode pad  21 , the wires  41  can be configured not intersect with the wires  42  by setting the arrangement of the electrode pads  21 . The arrangement of the electrode pads  21  may be determined such that the placement angles of the wires  41  substantially matches the placement angles of the wires  42 , in other words, such that the wires  41  and the wires  42  are substantially parallel. Thus, determining the arrangement of the electrode pads  21  such that the wires  41  do not intersect with the wires  42  may prevent contact between the wires  41  and the wires  42 . 
         [0024]      FIG. 3  is a plan view illustrating configuration of a semiconductor device  1 X according to a comparative example, and  FIG. 4  is a perspective view of the semiconductor device  1 X according to the comparative example. Similarly to the semiconductor chip  10  according to the above exemplary embodiment, in the semiconductor device  1 X according to the comparative example, a semiconductor chip  10 X includes an oscillator circuit  11 , two electrode pads  21  connected to the oscillator circuit  11 , and plural electrode pads  22  not connected to the oscillator circuit  11 . 
         [0025]    In the semiconductor chip  10 X according to the comparative example, the two electrode pads  21  connected to the oscillator circuit  11  are provided adjacent to each other and are provided in the vicinity of the oscillator circuit  11 . Disposing the electrode pads  21  in the vicinity of the oscillator circuit  11  enables the length of the internal wiring  23  connecting the oscillator circuit  11  and the electrode pads  21  together to be made shorter than the length of the internal wiring  23  formed in the semiconductor chip  10  according to the exemplary embodiment of the present disclosure as illustrated in  FIG. 1 . 
         [0026]    However, in cases in which the electrode pads  21  are disposed in the vicinity of the oscillator circuit  11 , as illustrated in  FIG. 3  and  FIG. 4 , the placement angle of the wires  41  connecting the electrode pads  21  and the electrode pads  31  of the oscillating element  30  becomes larger than the placement angles of the wires  42  connecting the electrode pads  22  and the lead terminals  51 . As a result, for example, there is a concern that contact between the wires  41  and the wires  42  will occur at the portion enclosed by the dashed lines in  FIG. 3 . In cases in which the distance between the electrode pads  21  and the electrode pads  22  is sufficiently long, contact between the wires  41  and the wires  42  in the semiconductor chip  10 X may be avoided. However, it is not always possible for the distance between the electrode pads  21  and the electrode pads  22  to be made sufficiently long while securing the required number of electrode pads  22 . In such cases, the size of the semiconductor chip may need to be increased. 
         [0027]    On the other hand, the semiconductor chip  10  according to the present exemplary embodiment is not configured so as to preferentially dispose the electrode pads  21  to be adjacent to each other, and is not configured so as to preferentially dispose the electrode pads  21  in the vicinity of the oscillator circuit  11 . Namely, in the semiconductor chip  10 , the electrode pads  21  connected to the oscillator circuit  11  are disposed such that the wires  41  and the wires  42  do not intersect, the electrode pads  21  are disposed at positions spaced apart from each other, and the electrode pads  21  are disposed at positions relatively far from the oscillator circuit  11 . Thus, by determining the arrangement of the electrode pads  21  such that the wires  41  and the wires  42  do not intersect with each other, the present exemplary embodiment may prevent contact between the wires  41  and the wires  42 . 
         [0028]    In the semiconductor chip  10  according to the exemplary embodiment of the present disclosure, the length of the internal wiring  23  is set longer than that in the semiconductor chip  10 X according to the comparative example, since the electrode pads  21  are disposed at positions relatively far from the oscillator circuit  11 . In the semiconductor chip  10  according to the present exemplary embodiment, the internal wiring  23  configures a wiring layout that passes through the region between the electrode pads  21  and  22  and the edge A 1  of the semiconductor chip  10 , namely, that passes through the outer peripheral region of the semiconductor chip  10 . Namely, the internal wiring  23  does not configure a wiring layout that connects the electrode pads  21  and the oscillator circuit  11  by the shortest routes. Rather, the internal wiring  23  configures a wiring layout that is diverted along the edge A 1  side of the semiconductor chip  10 . By configuring the wiring layout of the internal wiring  23  in such manner, the present exemplary embodiment may avoid interference between the internal wiring  23  and other wiring formed in the semiconductor chip  10 , and may simplify the arrangement of other wiring. 
         [0029]    Moreover, in the semiconductor chip  10  according to the present exemplary embodiment, since the electrode pads  21  are not preferentially disposed in the vicinity of the oscillator circuit  11 , there are fewer restrictions regarding the arrangement of the oscillator circuit  11 , and the degree of freedom for arrangement of the oscillator circuit  11  and other circuitry formed in the semiconductor chip  10  may be increased. 
         [0030]    Moreover, with the semiconductor device  1  according to the present exemplary embodiment, the two electrode pads  21  connected to the oscillator circuit  11  are each provided within the region R which is a region between the edge B 1  extension line and the edge B 2  extension line of the respective electrode pad  31 . This enables the length of the wires  41  connecting the electrode pads  21  and the electrode pads  31  to be made shorter than the length of the wires  41  in the semiconductor device  1 X according to the comparative example. Accordingly, the present exemplary embodiment may prevent contact between the wires  41  and the wires  42 . 
       Second Exemplary Embodiment 
       [0031]      FIG. 5  is a plan view illustrating configuration of a semiconductor device  1 A according to a second exemplary embodiment of the present disclosure. In a semiconductor chip  10 A configuring the semiconductor device  1 A, plural electrode pads, including electrode pads  21  connected to the oscillator circuit  11  and electrode pads  22  not connected to the oscillator circuit  11 , are disposed forming plural rows running along the edge A 1  forming an outer periphery of the semiconductor chip  10 A. In the example illustrated in  FIG. 5 , the two electrode pads  21  connected to the oscillator circuit  11  and some of the plural electrode pads  22  not connected to the oscillator circuit  11  are arrayed at an outside (a side closest to the edge A 1 ), and others of the plural electrode pads  22  not connected to the oscillator circuit  11  are arrayed at an inside (a side furthest from the edge A 1 ). 
         [0032]    Each of the electrode pads  21  is connected to an electrode pad  31  of the oscillating element  30  by a wire  41 , and each of the electrode pads  22  is connected to a corresponding lead terminal  51  by a wire  42 . Similarly to the semiconductor device  1  according to the first exemplary embodiment, the electrode pads  21  are disposed at positions such that the wires  41  do not intersect with the wires  42 . Accordingly, the above configuration may prevent contact between the wires  41  and the wires  42  to be prevented. 
         [0033]    Moreover, the semiconductor device  1 A and the semiconductor chip  10 A according to the present exemplary embodiment are configured with a layout in which the plural electrode pads, which includes both the electrode pads  21  and the electrode pads  22 , are disposed so as to form plural rows running along the edge A 1  of the semiconductor chip  10 A. Accordingly, the present exemplary embodiment may the number of electrode pads disposed running along the edge A 1  to be increased, compared to the semiconductor chip  10  according to the first exemplary embodiment. 
         [0034]    Note that, in each of the above exemplary embodiments, cases in which the oscillating element  30  was given as an example of electronic components packaged with the semiconductor chip  10 ,  10 A, and a case in which the semiconductor chip  10 ,  10 A includes the oscillator circuit  11  connected to the oscillating element  30 , have been described. However, the present disclosure is not limited thereto. The electronic components packaged with the semiconductor chip  10 ,  10 A may be, for example, electronic components other than an oscillating element, such as another semiconductor chip differing from the semiconductor chip  10 ,  10 A or a chip capacitor. In addition, the circuit formed on the semiconductor chip  10 ,  10 A may be a circuit other than an oscillator circuit, such as a power supply circuit or an input/output circuit connected to electronic components. Moreover, in the above exemplary embodiments, cases in which two electrode pads  21  and two wires  41  for connecting the semiconductor chip  10 ,  10 A and the electronic components (the oscillating element  30 ) are provided, have been described. However, there may be one or three or more electrode pads and wires for connecting the semiconductor chip and the electronic components. 
         [0035]    Further, in each of the above exemplary embodiments, cases in which the semiconductor chip  10 ,  10 A and the oscillating element  30  are mounted on a lead frame, have been described. However, a wiring substrate such as a printed circuit board may be employed instead of a lead frame. In such a case, the electrode pads formed on the wiring substrate may function as the lead terminals  51 .

Technology Category: 5