Abstract:
A method of manufacturing a semiconductor device, includes: preparing a semiconductor IC chip and an external electrode terminal which is positioned away from the semiconductor IC chip, wherein the semiconductor IC chip has first and second electrode pads thereon, the second electrode pad being positioned between the first electrode pad and the external electrode terminal; connecting the first electrode pad and the external electrode terminal by a loop-like wire; and pressing a portion of the loop-like wire toward the semiconductor IC chip, thereby connecting the portion of the loop-like wire with the second electrode pad.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a semiconductor device which has a structure that a semiconductor IC chip and an external electrode terminal are connected through a loop-like wire formed by wire bonding, a method of manufacturing the semiconductor device, and a wire bonding method. 
     2. Description of the Related Art 
     Various methods have been suggested to produce an electrical connection between an electrode pad of a semiconductor IC chip and an inner lead by wire bonding, at manufacturing a semiconductor device, in Japanese Patent Kokai Publication No. 2008-117888 (Patent Document 1) and Japanese Patent Kokai Publication No. 2008-34567 (Patent Document 2), for example.  FIG. 13  illustrates a typical wire bonding method which has the steps of: bonding a gold ball  5  to an electrode pad  4  of a semiconductor IC chip  3 , which is fixed on a die pad  1  with an adhesive agent  2 , by using a wire bonding apparatus (not illustrated in the drawing), forming a loop-like wire  6  so that a neck (a part standing straight)  6   a  of a predetermined length H 6a  is formed in a direction of right above a top  5   a  of the gold ball  5 , and extending the wire to the inner lead  40  and bonding the extended loop-like wire  6  to an inner lead  40 . 
     However, in the wire bonding of the conventional manufacturing method, it is necessary that the length H 6a  of the neck  6   a  of the loop-like wire  6  is considerably long in order to reduce stress occurring at the top  5   a  of the gold ball  5 . For this reason, the conventional semiconductor device which includes the semiconductor IC chip  3  and the loop-like wire  6  has the following problem that: it is difficult to reduce a height H 6  of the loop-like wire  6  sufficiently, and thus the semiconductor device cannot be sufficiently reduced in thickness. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to provide a method of manufacturing the semiconductor device which may realize a semiconductor device which is reduced in thickness. 
     According to an aspect of the present invention, a method of manufacturing a semiconductor device, includes: preparing a semiconductor IC chip and an external electrode terminal which is positioned away from the semiconductor IC chip, wherein the semiconductor IC chip has first and second electrode pads thereon, the second electrode pad being positioned between the first electrode pad and the external electrode terminal; connecting the first electrode pad and the external electrode terminal by a loop-like wire; and pressing a portion of the loop-like wire toward the semiconductor IC chip, thereby connecting the portion of the loop-like wire with the second electrode pad. 
     According to another aspect of the present invention, a method of manufacturing a semiconductor device, includes: preparing a semiconductor IC chip and an external electrode terminal which is positioned away from the semiconductor IC chip, wherein the semiconductor IC chip has first electrode pad which has first and second portions thereon, the second portion being positioned between the first portion of the first electrode pad and the external electrode terminal; connecting the first portion of the first electrode pad and the external electrode terminal by a loop-like wire; and pressing a portion of the loop-like wire toward the semiconductor IC chip, thereby connecting the portion of the loop-like wire with the second portion of the first electrode pad. 
     According to a further aspect of the present invention, a method of manufacturing a semiconductor device, includes: bonding an end of a wire to an electrode pad of a semiconductor IC chip by using a gold ball, and bonding the other end of the wire to an external electrode terminal, thereby forming a loop-like wire extending from the electrode pad to the external electrode terminal; and bonding the loop-like wire by using a bump gold ball so that a part of the loop-like wire, which is at a predetermined position on the semiconductor IC chip on a side of the external electrode terminal from the gold ball, is pressed down toward the semiconductor IC chip; wherein the predetermined position is set at a position so that at least a height of a highest part of the loop-like wire on the side of the external electrode terminal from the bump gold ball is lower than a height of a top of the bump gold ball. 
     According to a still further aspect, a semiconductor device includes: 
     a semiconductor IC chip having an electrode pad; 
     an external electrode terminal; 
     a loop-like wire connecting the electrode pad of the semiconductor IC chip and the external electrode terminal; 
     a gold ball by which an end of the loop-like wire is bonded to the electrode pad; and 
     a bump gold ball by which the loop-like wire is bonded so that a part of the loop-like wire, which is at a predetermined position on the semiconductor IC chip on a side of the external electrode terminal from the gold ball, is pressed down toward the semiconductor IC chip; 
     wherein the predetermined position is set at a position so that at least a height of a highest part of the loop-like wire on the side of the external electrode terminal from the bump gold ball is lower than a height of a top of the bump gold ball. 
     In the above semiconductor device, the predetermined position may be set at a position so that a height of a highest part of the whole of the loop-like wire is lower than a height of the top of the bump gold ball. 
     In the above semiconductor device, the semiconductor device, the semiconductor IC chip mat have another electrode pad on the side of the external electrode terminal from the gold ball, and the bump gold ball bonds the loop-like wire to said another electrode pad. 
     In the above semiconductor device, the electrode pad may have a bonding area on the side of the external electrode terminal from the gold ball, and the bump gold ball bonds the loop-like wire to the bonding area of the electrode pad. 
     In the above semiconductor device, the bump gold ball may have a center on the side of the external electrode terminal from a center of the gold ball, and bonds the loop-like wire onto the gold ball. 
     The above semiconductor device may further include an insulating film being formed on the semiconductor IC chip on the side of the external electrode terminal from the gold ball. 
     In the above semiconductor device, a height of a highest part of the loop-like wire before the bonding by using the bump gold ball may be within a range from 80 μm to 150 μm, and a height of a highest part of the loop-like wire after the bonding by using the bump gold ball may be lower than the height of the highest part of the loop-like wire before the bonding by using the bump gold ball. 
     According to a still further aspect, a semiconductor device includes: 
     an inner lead; 
     a semiconductor IC chip being formed at a distance from the inner lead and having a first electrode disposed on a surface of the semiconductor IC chip and a second electrode disposed on a side of the inner lead from the first electrode on the surface of the semiconductor IC chip, the second electrode being electrically connected to the first electrode; 
     a gold ball being formed on the first electrode so that the gold ball is electrically connected to the first electrode; 
     a loop-like wire extending from the gold ball to the inner lead through above the second electrode so as to be electrically connected to the inner lead; and 
     a bump gold ball being formed on the second electrode so that the bump gold ball is electrically connected to the second electrode through the loop-like wire. 
     In the above semiconductor device, it is possible that a height of the loop-like wire from the surface of the semiconductor IC chip does not exceed a height of the bump gold ball from the surface of the semiconductor IC chip. 
     In the above semiconductor device, the surface of the semiconductor IC chip between the second electrode and the inner lead may be covered by an insulating film. 
     In the above semiconductor device, the first electrode and the second electrode may be integrally formed as a single unit. 
     According to a still further aspect, a semiconductor device includes: 
     an inner lead; 
     a semiconductor IC chip being formed at a distance from the inner lead and having a first electrode on a surface of the semiconductor IC chip; 
     a gold ball being formed on the first electrode so that the gold ball is electrically connected to the first electrode; 
     a loop-like wire extending from the gold ball to the inner lead so as to be electrically connected to the inner lead; and 
     a bump gold ball being formed on the first electrode so that the bump gold ball is electrically connected to the first electrode through the loop-like wire. 
     In the above semiconductor device, it is possible that a height of the loop-like wire from the surface of the semiconductor. IC chip does not exceed a height of the bump gold ball from the surface of the semiconductor IC chip. 
     According to the present invention, a conductive bump such as a bump gold ball is bonded at a position where a height of the highest part of a loop-like wire may be reduced, thereby a semiconductor device which is reduced in thickness may be realized. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein: 
         FIG. 1  is a longitudinal sectional view schematically illustrating a first step of a method of manufacturing a semiconductor device according to a first embodiment of the present invention; 
         FIG. 2  is a longitudinal sectional view schematically illustrating a second step of the method of manufacturing the semiconductor device according to the first embodiment of the present invention; 
         FIG. 3  is a longitudinal sectional view schematically illustrating a third step of the method of manufacturing the semiconductor device according to the first embodiment of the present invention; 
         FIG. 4  is a longitudinal sectional view schematically illustrating a fourth step of the method of manufacturing the semiconductor device according to the first embodiment of the present invention; 
         FIG. 5  is a plan view schematically illustrating the structure of  FIG. 4 ; 
         FIG. 6  is an enlarged view of a main part for explaining the semiconductor device and the method of manufacturing the semiconductor device according to the first embodiment of the present invention; 
         FIG. 7  is a longitudinal sectional view schematically illustrating a semiconductor device according to a second embodiment of the present invention; 
         FIG. 8  is a plan view schematically illustrating the structure of  FIG. 7 ; 
         FIG. 9  is an enlarged view of a main part for explaining the semiconductor device and a method of manufacturing the semiconductor device according to the second embodiment; 
         FIG. 10  is a longitudinal sectional view schematically illustrating a semiconductor device according to a third embodiment of the present invention; 
         FIG. 11  is a plan view schematically illustrating the structure of  FIG. 10 ; 
         FIG. 12  is an enlarged view of a main part of the semiconductor device for explaining the semiconductor device and a method of manufacturing the semiconductor device according to the third embodiment of the present invention; and 
         FIG. 13  is a longitudinal sectional view schematically illustrating a conventional semiconductor device. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     First Embodiment 
     Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications will become apparent to those skilled in the art from the detailed description. 
       FIGS. 1 to 4  are longitudinal sectional views schematically illustrating steps of a method of manufacturing a semiconductor device according to a first embodiment of the present invention, and  FIG. 5  is a plan view schematically illustrating the structure of  FIG. 4 . 
     Firstly, in the method of manufacturing the semiconductor device according to the first embodiment, as illustrated in  FIG. 1 , a semiconductor IC chip  13  which is fixed on a die pad  11  with an adhesive agent  12  and an inner lead  40  which is an external electrode terminal are placed at predetermined positions in a wire bonding apparatus (not illustrated in the drawing). At that time, in general, the inner lead  40  is placed to be lower than a surface of the semiconductor IC chip  13 . In the first embodiment, the semiconductor IC chip  13  has a first electrode pad  14   a  and a second electrode pad  14   b  for wire bonding which are arranged side by side in a direction toward the inner lead  40  and on the upper surface of the chip. The first electrode pad  14   a  and the second electrode pad  14   b  are two separated electrodes which are electrically connected with each other in the semiconductor IC chip  13  by a conductive member or conductive line  14   c , for example. In the first embodiment, the first electrode pad  14   a  and the second electrode pad  14   b  are formed so that their upper surfaces are the same in height. 
     In the first embodiment, the semiconductor IC chip  13  may have an insulating film  18  on its upper surface. It is sufficient that the insulating film  18  covers at least the surface below a loop-like wire  16  which electrically connects a bump gold ball  17  and the inner lead  40 . In this case, even if the loop-like wire  16  which will be described below touches the semiconductor IC chip  13  because a height of the loop-like wire  16  is too low, the touch is caused on the insulating film  18  and therefore there is no damage to performance. 
     Next, as illustrated in  FIG. 2 , by a capillary of the wire bonding apparatus (not illustrated in the drawing), a gold ball (i.e., a first gold ball)  15  is formed on the first electrode pad  14   a , an end of the wire is bonded by using the gold ball  15  to the first electrode pad  14   a  of the semiconductor IC chip  13 , the other end of the wire is bonded to the inner lead  40 , and thus the loop-like wire  16  is formed so as to extend from the first electrode pad  14   a  to the inner lead  40 . At this time, the loop-like wire  16  is formed so as to extend from the first electrode pad  14   a  through above the second electrode pad  14   b  to the inner lead  40 . Therefore, at the following step of bonding the loop-like wire  16  to the second electrode pad  14   b  by using the bump gold ball  17 , the loop-like wire  16  may be pressed down by using the bump gold ball  17  near a starting point of the bonding, i.e., near a point where the loop-like wire  16  is generally the highest, as well as the loop-like wire  16  may be electrically connected to the second electrode pad  14   b , which is electrically connected to the first electrode pad  14   a . Thus, an advantage of the present invention that electrical reliability is improved between the semiconductor IC chip  13  and the inner lead  40  while the loop-like wire  16  is reduced in height may be more effectively realized. Although the height of the loop-like wire  16  is approximately 80 to 150 μm in this case, it is desirable that the height of the loop-like wire  16  be lower (e.g., approximately 80 to 100 μm). 
     Next, as illustrated in  FIG. 3 , a bump gold ball (or a second gold ball)  17   a  is formed at a tip of the capillary  50  of the wire bonding apparatus. Then, as illustrated in  FIG. 4 , the bump gold ball  17  is bonded so that the loop-like wire  16  is pressed down toward the semiconductor IC chip  13  at a predetermined position on the semiconductor IC chip  13 , on a side of the inner lead  40  from the gold ball  15 , i.e., at a position on the second electrode pad  14   b . The bump gold ball  17  is electrically connected to the second electrode pad  14   b  through the loop-like wire  16  which is interposed therebetween, and the second electrode pad  14   b  is electrically connected to the first electrode pad  14   a . Since the loop-like wire is reduced in height, even if the loop-like wire  16  on the gold ball  15  is ruptured, reliability of the electrical connection between the semiconductor IC chip  13  and the inner lead  40  may be improved. 
       FIG. 6  is an enlarged view of a main part for explaining the semiconductor device and the method of manufacturing the semiconductor device according to the first embodiment of the present invention. As illustrated in  FIG. 6 , the predetermined position (which may be specified by a distance D 17  between a center of the gold ball  15  and a center of the bump gold ball  17 , for example) is set so that a height of a highest part of the loop-like wire  16  after the step of bonding the loop-like wire  16  by using the bump gold ball  17  is lower than a height of the highest part of the loop-like wire  16  before the step of bonding the loop-like wire  16  by using the bump gold ball  17 , and at least a height H 16  of a highest part of the loop-like wire  16  on a side of the inner lead  40  from the bump gold ball  17  is lower than a height H 17  of a top  17   a  of the bump gold ball  17 . It is desirable for the predetermined position to be set so that a height of a highest part of the whole of the loop-like wire  16  (a height of a highest part in a range which includes a side of the gold ball  15  from the bump gold ball  17 ) is lower than that of the top  17   a  of the bump gold ball  17  (e.g., 50 μm of height or less). 
     The predetermined position may be calculated or experimentally determined on the basis of conditions such as a position of the gold ball  15 , a position of the inner lead  40 , material for the loop-like wire  16  and the bump gold ball  17 , operational conditions of the capillary to be used, and a tolerance value for stress occurring at the top  15   a  of the gold ball  15 . For example, it is desirable that the position of the bump gold ball  17  be the highest position of the loop-like wire  16  or a neighboring position thereof before bonding the bump gold ball  17 . For this reason, in the semiconductor IC chip  13 , it is necessary that the second electrode pad  14   b  is formed at a position which corresponds to the desired predetermined position. 
     As described above, according to the semiconductor device and the method of manufacturing the semiconductor device of the first embodiment, the height of the highest part of the loop-like wire  16  may be lowered by bonding the bump gold ball  17  which presses down the loop-like wire  16  toward the semiconductor IC chip  13 , therefore the semiconductor device may be reduced in thickness. 
     When the first electrode pad  14   a  and the second electrode pad  14   b  are separated electrodes, the first electrode pad  14   a  and the second electrode pad  14   b  may be disposed so that they are considerably distant from each other. Thus, the semiconductor device and the method of manufacturing the semiconductor device according to the first embodiment is suitable for a case that the bonding position of the bump gold ball  17  needs be considerably distant from the bonding position of the gold ball  15 . For example, if the loop-like wire  16  has a long length (e.g., 3 mm or more), the loop-like wire  16  may be high in a middle of the loop-like wire  16 , not near the semiconductor IC chip  13 . In this case, it is effective that the first electrode pad  14   a  and the second electrode pad  14   b  are disposed at a distance from each other and the second electrode pad  14   b  is disposed at a position where a lowest height of the loop-like wire  16  may be obtained. 
     Second Embodiment 
       FIG. 7  is a longitudinal sectional view schematically illustrating steps of a method of manufacturing a semiconductor device according to a second embodiment of the present invention,  FIG. 8  is a plan view schematically illustrating the structure of  FIG. 7 , and  FIG. 9  is an enlarged view of a main part for explaining the semiconductor device according to the second embodiment of the present invention and the method of manufacturing the semiconductor device. 
     In the method of manufacturing the semiconductor device according to the second embodiment, as illustrated in  FIG. 7 , a semiconductor IC chip  23  which is fixed on a die pad  21  with an adhesive agent  22  and the inner lead  40  are disposed in predetermined positions in a wire bonding apparatus (not illustrated in the drawing). At this time, in general, the inner lead  40  is disposed to be lower than an upper surface of the semiconductor IC chip  23 . In the second embodiment, the semiconductor IC chip  23  has a single electrode pad  24  for wire bonding which has a long length in a direction toward the inner lead  40  on the upper surface of the chip. The electrode pad  24  of the second embodiment may include a structure that the first electrode pad  14   a  and the second electrode pad  14   b  of the first embodiment are integrally formed as a single unit. An insulating film  28  may be provided on the upper surface of the semiconductor IC chip  23 , if necessary. It is sufficient that the insulating film  28  is formed at least below a loop-like wire  26  which electrically connects a bump gold ball  27  and the inner lead  40 . 
     Next, by a capillary (not illustrated in the drawing), a gold ball  25  is formed on the electrode pad  24  of the semiconductor IC chip  23 , an end of a wire is bonded to the electrode pad  24  by the gold ball  25 , and the other end of the wire is bonded to the inner lead  40 , thereby forming the loop-like wire  26  extending from the gold ball  25  on the electrode pad  24  to the inner lead  40 . The other end of the wire may be bonded to the inner lead  40 , for example, by a known wire bonding method or the like. 
     Next, a bump gold ball is formed at a tip of the capillary. Then, the loop-like wire  26  is bonded by using the bump gold ball  27  so that the bump gold ball  27  presses down the loop-like wire  26  toward the semiconductor IC chip  23 , at a predetermined position on the semiconductor IC chip  23  on a side of the inner lead  40  from the gold ball  25 , i.e., in a wire bonding area on the side of the inner lead  40  from the gold ball  25  on the electrode pad  24 . 
     In a similar manner to in the first embodiment, the predetermined position (which may be specified by a distance D 27  between a center of the gold ball  25  and a center of the bump gold ball  27 , for example) is set so that a height of a highest part, of the loop-like wire  26  after the step of bonding the loop-like wire  26  by using the bump gold ball  27  is lower than a height of the highest part of the loop-like wire  26  before the step of bonding the loop-like wire  26  by using the bump gold ball  27  and at least a height H 26  of a highest part of the loop-like wire  16  on a side of the inner lead  40  from the bump gold ball  27  is lower than a height H 27  of a top  27   a  of the bump gold ball  27  (e.g., 50 μm of height or less). It is desirable for the predetermined position to be set so that a height of a highest part of the whole of the loop-like wire  26  is lower than that of the top  27   a  of the bump gold ball  27 . 
     The predetermined position may be calculated or experimentally determined on the basis of conditions such as a position of the gold ball  25 , a position of the inner lead  40 , material for the loop-like wire  26  and the bump gold ball  27 , operational conditions of the capillary to be used, and a tolerance value for stress occurring at the top  25   a  of the gold ball  25 . For this reason, in the semiconductor IC chip  23 , it is necessary that the electrode pad  24  has a wide size so as to include a corresponding position to the determined predetermined position. There is no functional difference between the cases that a single electrode pad is used as the second embodiment (which may make the structure simple) and that a plurality of electrode pads are formed as the first embodiment (which may make material for the electrode pads to be reduced). 
     As described above, according to the semiconductor device and the method of manufacturing the semiconductor device of the second embodiment, the bump gold ball  27  is bonded at a position where the height of the highest part of the loop-like wire  26  may be lowered in comparison with a case with no bump gold ball, thereby the semiconductor device may be reduced in thickness. 
     According to the semiconductor device and the method of manufacturing the semiconductor device of the second embodiment, the single electrode pad  24  includes the gold ball  25  and the bump gold ball  27 , thereby it is suitable for a case that a distance between the gold ball  25  and the bump gold ball  27  is desired to be small, i.e., an area of the semiconductor IC chip is desired to be small. 
     In the second embodiment, the single electrode pad  24  for wire bonding which has a long length in a direction toward the inner lead  40  is provided on the upper surface of the semiconductor IC chip  23 . This is the difference from the first embodiment. 
     Third Embodiment 
       FIG. 10  is a longitudinal sectional view schematically illustrating steps of a method of manufacturing a semiconductor device according to a third embodiment of the present invention,  FIG. 11  is a plan view schematically illustrating the structure of  FIG. 10 , and  FIG. 12  is an enlarged view of a main part for explaining the semiconductor device and the method of manufacturing the semiconductor device according to the third embodiment. 
     In the method of manufacturing the semiconductor device according to the third embodiment, a semiconductor IC chip  33  which is fixed on a die pad  31  with an adhesive agent  32  and the inner lead  40  are disposed in predetermined positions in a wire bonding apparatus (not illustrated in the drawing). At that time, in general, the inner lead  40  is disposed to be lower than an upper surface of the semiconductor IC chip  33 . In the third embodiment, an electrode pad  34  for wire bonding is disposed on the upper surface of the semiconductor IC chip  33 . An insulating film (not illustrated in the drawing) may be provided on the upper surface of the semiconductor IC chip  33 , if necessary. The insulating film may be formed at least below a loop-like wire  36  which electrically connects a bump gold ball  37  and the inner lead  40 . 
     Next, by a capillary of the wire bonding apparatus (not illustrated in the drawing), a gold ball  35  is formed on the electrode pad  34  of the semiconductor IC chip  33 , an end of the wire is bonded to the electrode pad  34  by the gold ball  35 , and the other end of the wire is bonded to the inner lead  40 . As a result, the loop-like wire  36  is formed so as to extend from the gold ball  35  on the electrode pad  34  to the inner lead  40 . 
     Next, a bump gold ball is formed at a tip of the capillary. Then, the loop-like wire  36  is bonded by using the bump gold ball  37  so that the loop-like wire  36  is pressed down toward the semiconductor IC chip  33 , on the gold ball  35  which is disposed at a predetermined position on the semiconductor IC chip  33  on a side of the inner lead  40  from the gold ball  35  (a distance L 37  in  FIG. 12 ) and on the side of the inner lead  40  from the gold ball  35 . The step of bonding the loop-like wire  36  by using the bump gold ball  37  includes a step, in which the bump gold ball  37  presses down the loop-like wire  36  on a top of the gold ball  35 . At this step, the bump gold ball  37  may press down the loop-like wire  36  on the top of the gold ball  35  for bonding, at a position which is slightly shifted from directly above the gold ball  35  in a horizontal direction. For example, the loop-like wire  36  may be bonded on the gold ball  35  by using the bump gold ball  37  which has a center on a side of the inner lead  40  from a center of the gold ball  35 . Thus, bonding by using the bump gold ball  37  which presses down the loop-like wire  36  on the top of the gold ball  35  at a position which is slightly shifted from directly above the gold ball  35  in the horizontal direction makes it possible to solve a problem of a height of the chip caused when the loop-like wire  36  is pressed down at a position directly above the gold ball  35  by using the bump gold ball  37  (i.e., the height of the whole chip is greater because the wire is between the gold ball  35  and the bump gold ball  37 ), thereby the height of the whole chip may be reduced. By interposing the loop-like wire  36  between the gold ball  35  and the bump gold ball  37 , a structure in which the bump gold ball  37  strengthens the top of the gold ball  35  is obtained, even if the loop-like wire  36  is reduced in height as in  FIG. 12 , thereby electrical reliability may be improved. 
     According to the semiconductor device and the method of manufacturing the semiconductor device of the third embodiment, in a similar manner to the first embodiment, the predetermined position (which may be specified by the distance L 37  between a center of the gold ball  35  and a center of the bump gold ball  37 , for example) is set so that a height H 36  of a highest part of the loop-like wire  36  after bonding the loop-like wire  36  by using the bump gold ball  37  is lower than a height of the highest part of the loop-like wire  36  before bonding the loop-like wire  36  by using the bump gold ball  37 , and the height H 36  of the highest part of the loop-like wire  36  is lower than a height H 37  of a top  37   a  of the bump gold ball  37 . That is, the predetermined position is set so that the height H 36  of the highest part of the whole of the loop-like wire  36  is lower than the height H 37  of the top  37   a  of the bump gold ball  37 . 
     The predetermined position may be calculated or experimentally determined on the basis of conditions such as a position of the gold ball  35 , a position of the inner lead  40 , material for the loop-like wire  36  and the bump gold ball  37 , operational conditions of the capillary to be used, and a tolerance value of stress occurring at the top of the gold ball  35 . 
     As described above, according to the semiconductor device and the method of manufacturing the semiconductor device of the third embodiment, the bump gold ball  37  is bonded at a position where the height of the highest part of the loop-like wire  36  may be lowered, thereby the semiconductor device may be reduced in thickness. 
     According to the semiconductor device and the method of manufacturing the semiconductor device of the third embodiment, the top  35   a  of the gold ball  35  is strengthened by using the bump gold ball  37  which presses down the top  35   a  of the gold ball  35 , thereby risk of a rupture of the loop-like wire  36  at the top  35   a  of the gold ball  35  may be reduced and reliability of electrical performance may be improved. 
     The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of following claims.